Optics and Laser Technology最新文献

英文中文

Performance measurement of unidirectional continuous-wave ring Ti:sapphire laser with self-injection locking and isolator-based configurations

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-12 DOI: 10.1016/j.optlastec.2025.112710

Yingjie Ma , Xinxiu Zhou , Yutong Wang , Pengyu Zhang , Jingcheng Shang

Commercial isolators used in solid-state lasers are costly, suffer from high losses, and require precise alignment, while high-power pumping induces thermal lensing, limiting their application. In atomic magnetometry and inertial measurements under the Spin-Exchange Relaxation-Free (SERF) regime, which require low-intensity noise in the 0–100 Hz range from the pump laser, the self-injection method offers a promising alternative by achieving unidirectional operation with minimal loss. This work presents a continuous-wave (CW) ring Ti:sapphire laser that achieves unidirectional operation using either the self-injection method or a commercial isolator, and the laser performance under both methods was compared, with the free-running state used as a reference. The results show that self-injection improved unidirectionality without introducing additional losses, preserved the output wavelength and mode structures, and significantly suppressed intensity noise below 10 kHz, with minimal impact on higher frequencies. It also suppressed frequency noise from 1 Hz to 1 kHz and narrowed the linewidth. These findings underscore the self-injection method’s role in low-frequency noise suppression in Ti:sapphire lasers and highlight its potential for advancing quantum precision measurements.

{"title":"Performance measurement of unidirectional continuous-wave ring Ti:sapphire laser with self-injection locking and isolator-based configurations","authors":"Yingjie Ma , Xinxiu Zhou , Yutong Wang , Pengyu Zhang , Jingcheng Shang","doi":"10.1016/j.optlastec.2025.112710","DOIUrl":"10.1016/j.optlastec.2025.112710","url":null,"abstract":"<div><div>Commercial isolators used in solid-state lasers are costly, suffer from high losses, and require precise alignment, while high-power pumping induces thermal lensing, limiting their application. In atomic magnetometry and inertial measurements under the Spin-Exchange Relaxation-Free (SERF) regime, which require low-intensity noise in the 0–100 Hz range from the pump laser, the self-injection method offers a promising alternative by achieving unidirectional operation with minimal loss. This work presents a continuous-wave (CW) ring Ti:sapphire laser that achieves unidirectional operation using either the self-injection method or a commercial isolator, and the laser performance under both methods was compared, with the free-running state used as a reference. The results show that self-injection improved unidirectionality without introducing additional losses, preserved the output wavelength and mode structures, and significantly suppressed intensity noise below 10 kHz, with minimal impact on higher frequencies. It also suppressed frequency noise from 1 Hz to 1 kHz and narrowed the linewidth. These findings underscore the self-injection method’s role in low-frequency noise suppression in Ti:sapphire lasers and highlight its potential for advancing quantum precision measurements.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112710"},"PeriodicalIF":4.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation and mechanical property of 1Cr15Ni4Mo3N stainless steel efficiently repaired by laser metal deposition with a synergistic improvement strategy

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-12 DOI: 10.1016/j.optlastec.2025.112750

Maosen Hu , Yaojie Chao , Yuhang Zhang , Xiaolong Dong , Xiaodong Qi , Desheng Li , Hai Lin

Laser metal deposition (LMD) optimized with the strategy of synergistic improvement of the laser power (P) and powder feed rate (PFR) was employed to repair 1Cr15Ni4Mo3N stainless steel. Herein, the P of the 1080 nm fiber laser was increased layer by layer (1000, 1200 and 1300 W) while raising the PFR (8.5, 10, 11.5 g/min), with the aim of achieving favorable performance and higher efficiency. Additionally, the thermal behavior during repair process was exposed by finite element analysis, and the comprehensive analysis of the temperature distribution and the thermal cycle are in good agreement with the trend of the microhardness variation in the deposition area. The growth rates of the molten pool depth at the centers of the second and third layers are 19.79 % and 12.33 %, respectively, indicating that the poor fusibility of the interlayer fusion zones caused by the increased PFR has been avoided due to the improved P. Moreover, the average tensile strength and the impact toughness of the laser-repaired specimen (LS) are derived to be 1489 MPa and 88.7 J/cm², which are 10.12 % and 10.60 % higher than that of the base material (BM), respectively, and the elongation of the LS reaches 17.3 %. The mechanical properties of the LS are guaranteed while the efficiency is improved, suggesting that the strategy and the developed finite element model can serve to provide application value in the rapid maintenance of precipitation-hardening stainless steel.

{"title":"Numerical simulation and mechanical property of 1Cr15Ni4Mo3N stainless steel efficiently repaired by laser metal deposition with a synergistic improvement strategy","authors":"Maosen Hu , Yaojie Chao , Yuhang Zhang , Xiaolong Dong , Xiaodong Qi , Desheng Li , Hai Lin","doi":"10.1016/j.optlastec.2025.112750","DOIUrl":"10.1016/j.optlastec.2025.112750","url":null,"abstract":"<div><div>Laser metal deposition (LMD) optimized with the strategy of synergistic improvement of the laser power (<em>P</em>) and powder feed rate (PFR) was employed to repair 1Cr15Ni4Mo3N stainless steel. Herein, the <em>P</em> of the 1080 nm fiber laser was increased layer by layer (1000, 1200 and 1300 W) while raising the PFR (8.5, 10, 11.5 g/min), with the aim of achieving favorable performance and higher efficiency. Additionally, the thermal behavior during repair process was exposed by finite element analysis, and the comprehensive analysis of the temperature distribution and the thermal cycle are in good agreement with the trend of the microhardness variation in the deposition area. The growth rates of the molten pool depth at the centers of the second and third layers are 19.79 % and 12.33 %, respectively, indicating that the poor fusibility of the interlayer fusion zones caused by the increased PFR has been avoided due to the improved <em>P</em>. Moreover, the average tensile strength and the impact toughness of the laser-repaired specimen (LS) are derived to be 1489 MPa and 88.7 J/cm<sup>2</sup>, which are 10.12 % and 10.60 % higher than that of the base material (BM), respectively, and the elongation of the LS reaches 17.3 %. The mechanical properties of the LS are guaranteed while the efficiency is improved, suggesting that the strategy and the developed finite element model can serve to provide application value in the rapid maintenance of precipitation-hardening stainless steel.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112750"},"PeriodicalIF":4.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved conversion efficiency of mid-infrared MgO:PPLN optical parametric oscillator by optimizing pump pulse waveform

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-12 DOI: 10.1016/j.optlastec.2025.112786

Jindai Liu , Yang He , Yuhang Liang , Fei Chen

We present a high-efficiency mid-infrared (MIR) optical parametric oscillator (OPO) based on MgO-doped periodically poled lithium niobate (MgO:PPLN) crystal pumped by a linearly polarized ytterbium-doped fiber laser (YDFL). The YDFL can amplify the laser pulses with square, Gaussian, triangular, sinusoidal, and trapezoidal waveforms. We investigated how the MIR conversion efficiency is influenced by the pulse waveform of YDFL theoretically and experimentally. The results demonstrate that the conversion efficiency is maximized by choosing a square wave as the YDFL seed waveform, which can promote the MgO:PPLN-OPO to reach the pump threshold rapidly and allows for a longer continuous oscillation time with the same pump pulse energy. When the square-wave pump power is 61.1 W, the OPO attains a maximum power of 10.3 W with a conversion efficiency of 16.86 % at 3.759 μm.

引用次数: 0

MSFA-Net: Multi-scale feature aggregation and attention-enhanced U-Net for microscopic hyperspectral pathology images segmentation

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-11 DOI: 10.1016/j.optlastec.2025.112652

Hongmin Gao , Jingwei Gu , Shenxiang Liu , ShuFang Xu , Qi Zhao

Pathological diagnosis is regarded as the gold standard for early gastric cancer detection. Automatic segmentation efficiently delineates lesion areas, which are essential for identifying and diagnosing these lesions. Current segmentation methods that rely on grayscale or RGB images are hindered by limited information, whereas advancements in microscopic hyperspectral imaging technology offer a novel perspective for early gastric cancer diagnosis. This technology provides rich spatial and spectral information that effectively reflects the chemical composition and physical state of tissues, thereby enhancing the identification of cancerous regions. U-Net has marked a significant advancement in segmentation networks and has demonstrated promising results in hyperspectral pathology images segmentation tasks. However, the substantial semantic gap between its encoder and decoder presents challenges in addressing complex lesion areas. To address this problem, a multi-scale feature fusion and attention-enhanced U-Net (MSFA-Net) is proposed which optimized for reduce semantic gaps, and applied to the segmentation of precancerous lesions in gastric cancer using microscopic hyperspectral pathology images. The Cross-Stage Feature Fusion (CSFF) module is designed to accurately merge encoder-level features, alongside Multi-Scale Integrated Convolution (MSIConv) extracts multi-scale features, effectively bridging the semantic gap between the encoder and decoder. Additionally, the Adaptive-weighted Attention (AWA) module is designed to optimize the fusion of encoder and decoder features, further enhancing the recovery of image details. Experimental results demonstrate that the model performs well on both Intestinal Metaplasia (IM) and Gastric Intraepithelial Neoplasia (GIN) stages of precancerous gastric cancer.

{"title":"MSFA-Net: Multi-scale feature aggregation and attention-enhanced U-Net for microscopic hyperspectral pathology images segmentation","authors":"Hongmin Gao , Jingwei Gu , Shenxiang Liu , ShuFang Xu , Qi Zhao","doi":"10.1016/j.optlastec.2025.112652","DOIUrl":"10.1016/j.optlastec.2025.112652","url":null,"abstract":"<div><div>Pathological diagnosis is regarded as the gold standard for early gastric cancer detection. Automatic segmentation efficiently delineates lesion areas, which are essential for identifying and diagnosing these lesions. Current segmentation methods that rely on grayscale or RGB images are hindered by limited information, whereas advancements in microscopic hyperspectral imaging technology offer a novel perspective for early gastric cancer diagnosis. This technology provides rich spatial and spectral information that effectively reflects the chemical composition and physical state of tissues, thereby enhancing the identification of cancerous regions. U-Net has marked a significant advancement in segmentation networks and has demonstrated promising results in hyperspectral pathology images segmentation tasks. However, the substantial semantic gap between its encoder and decoder presents challenges in addressing complex lesion areas. To address this problem, a multi-scale feature fusion and attention-enhanced U-Net (MSFA-Net) is proposed which optimized for reduce semantic gaps, and applied to the segmentation of precancerous lesions in gastric cancer using microscopic hyperspectral pathology images. The Cross-Stage Feature Fusion (CSFF) module is designed to accurately merge encoder-level features, alongside Multi-Scale Integrated Convolution (MSIConv) extracts multi-scale features, effectively bridging the semantic gap between the encoder and decoder. Additionally, the Adaptive-weighted Attention (AWA) module is designed to optimize the fusion of encoder and decoder features, further enhancing the recovery of image details. Experimental results demonstrate that the model performs well on both Intestinal Metaplasia (IM) and Gastric Intraepithelial Neoplasia (GIN) stages of precancerous gastric cancer.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112652"},"PeriodicalIF":4.6,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nondestructive characterization of nano-sized absorbing defects within laser devices using Atomic Force Microscopy-based Infrared Spectroscopy (AFM-IR)

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-11 DOI: 10.1016/j.optlastec.2025.112773

Zhenyin Lu , Shenghuan Fang , Binbin Jiang , Hongfei Jiao , Xinbin Cheng , Zhanshan Wang , Jinlong Zhang

Currently, the application of micro-nanostructures has gradually expanded into the field of high-power lasers due to their unique advantages. However, absorbing defects introduced in the fabrication process have negative effects on the laser induced damage threshold (LIDT) and overall device performance. Research on characterizing nano-sized absorbing defects remains scarce due to various constraints. In this study, nano-sized polymethyl methacrylate (PMMA) and polystyrene (PS) particles were chosen to simulate nano-sized absorbing defects. Their distributions and compositions were successfully characterized using Atomic Force Microscopy-based Infrared Spectroscopy (AFM-IR) with a high resolution of approximately 7.1 nm. Absorbing defects as small as 50 nm have been characterized, and different substances can be identified in the same region. Additionally, we calculated the local absorption coefficients for the samples. The study confirms the feasibility of AFM-IR for characterizing nano-sized absorbing defects. This technology will facilitate more effective study and control of defects, thereby promoting the performance optimization of micro-nanostructures and high-power laser devices.

目前，微纳结构因其独特的优势已逐渐扩展到高功率激光器领域。然而，制造过程中引入的吸收缺陷会对激光诱导损伤阈值（LIDT）和整体器件性能产生负面影响。由于各种限制，有关纳米级吸收缺陷的表征研究仍然很少。本研究选择了纳米级聚甲基丙烯酸甲酯（PMMA）和聚苯乙烯（PS）颗粒来模拟纳米级吸收缺陷。使用基于原子力显微镜的红外光谱（AFM-IR）技术成功地对它们的分布和组成进行了表征，分辨率高达约 7.1 nm。对小至 50 纳米的吸收缺陷进行了表征，并可在同一区域识别出不同的物质。此外，我们还计算了样品的局部吸收系数。这项研究证实了利用原子力显微镜-红外技术表征纳米级吸收缺陷的可行性。这项技术将有助于更有效地研究和控制缺陷，从而促进微纳结构和高功率激光设备的性能优化。

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引用次数: 0

Morphology-driven spectral extraction method for enhanced liquid–solid transition LIBS detection of heavy metals in water

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-09 DOI: 10.1016/j.optlastec.2025.112686

Weihua Huang , Kaiqin Li , Aojun Gong , Harse Sattar , Junfei Nie , Lianbo Guo

In the detection of heavy metals in water by laser-induced breakdown spectroscopy (LIBS) via liquid–solid transition, the morphology of the solute region exhibits significant variability and randomness. To ensure full-coverage scanning of the solute region, a large enough rectangular laser scanning array is commonly utilized. However, this approach may incorporate spectra that are not ablated from the solute region, thereby impacting the spectral stability and the limit of detection (LOD). In this work, a morphology-driven spectral extraction method was proposed. It aims to extract the spectra of the solute region from the full-coverage scanning spectra, and then exclude the interference of invalid spectra. To assess the validity of the method, a series of 1:1:1 mixed solutions of the elements cadmium (Cd), manganese (Mn), and chromium (Cr) was prepared. After full-coverage scanning by a large enough rectangular array, the solute region spectra were extracted using the morphology-driven spectral extraction method. Quantification was performed using the spectra both before and after extraction, then comparing the spectral stability and quantitative accuracy. The results indicated that using the extracted spectra could significantly improved quantitative performance. Spectral stability was enhanced by a 38.8% reduction in the relative standard deviation (RSD), ensuring more consistent and reliable measurements. The LOD was reduced by 62.6%, enabling highly sensitive detection of trace-level concentrations. In conclusion, the morphology-driven solute region spectral extraction method proposed in this work can effectively mitigate the impact of invalid spectra, thereby enhancing the spectral stability and lowering the LOD for heavy metal detection in water by LIBS.

{"title":"Morphology-driven spectral extraction method for enhanced liquid–solid transition LIBS detection of heavy metals in water","authors":"Weihua Huang , Kaiqin Li , Aojun Gong , Harse Sattar , Junfei Nie , Lianbo Guo","doi":"10.1016/j.optlastec.2025.112686","DOIUrl":"10.1016/j.optlastec.2025.112686","url":null,"abstract":"<div><div>In the detection of heavy metals in water by laser-induced breakdown spectroscopy (LIBS) via liquid–solid transition, the morphology of the solute region exhibits significant variability and randomness. To ensure full-coverage scanning of the solute region, a large enough rectangular laser scanning array is commonly utilized. However, this approach may incorporate spectra that are not ablated from the solute region, thereby impacting the spectral stability and the limit of detection (LOD). In this work, a morphology-driven spectral extraction method was proposed. It aims to extract the spectra of the solute region from the full-coverage scanning spectra, and then exclude the interference of invalid spectra. To assess the validity of the method, a series of 1:1:1 mixed solutions of the elements cadmium (Cd), manganese (Mn), and chromium (Cr) was prepared. After full-coverage scanning by a large enough rectangular array, the solute region spectra were extracted using the morphology-driven spectral extraction method. Quantification was performed using the spectra both before and after extraction, then comparing the spectral stability and quantitative accuracy. The results indicated that using the extracted spectra could significantly improved quantitative performance. Spectral stability was enhanced by a 38.8% reduction in the relative standard deviation (RSD), ensuring more consistent and reliable measurements. The LOD was reduced by 62.6%, enabling highly sensitive detection of trace-level concentrations. In conclusion, the morphology-driven solute region spectral extraction method proposed in this work can effectively mitigate the impact of invalid spectra, thereby enhancing the spectral stability and lowering the LOD for heavy metal detection in water by LIBS.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"186 ","pages":"Article 112686"},"PeriodicalIF":4.6,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study the shrinkage process of UV-curable adhesive using digital holographic interferometry

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-09 DOI: 10.1016/j.optlastec.2025.112746

Varun Kumar , Ryoichi Ozono , Taisei Kishikawa , Katsuya Kito , Katsuhiro Iwasaki , Masayuki Yokota

In this paper digital holographic interferometry (DHI) is implemented to study the shrinkage/hardening behavior of UV-curable acrylic adhesives. In the experiment, an aluminum plate as a reflective object was placed on top of the UV adhesive coating, and the temporal variation of the thickness of the UV adhesive coating during the curing process was determined from the vertical displacement of the aluminum plate using DHI. The effect of two different UV-illumination intensities on the curing process and shrinkage behavior were studied on two types of acrylic adhesives with different compositions and viscosity. In the case of first adhesive A, the experimentally calculated values of final shrinkage were 3.23 µm for the UV illumination intensity of 30

m W / {c m}^{2}

, and 4.39 µm for UV illumination intensity of 50

m W / {c m}^{2}

. While in case of second adhesive B, the measured final shrinkage values were 0.15 µm for the UV illumination intensity of 30

m W / {c m}^{2}

, and 1.12 µm for the UV illumination intensity of 50

m W / {c m}^{2}

. The proposed method for the experimental investigations of shrinkage behaviors/hardening process of UV-adhesives provides useful information for analyzing the curing behavior of adhesives in their developing stages. Also, the quantitative investigations of shrinkage behavior of adhesives are highly required for the assembly of high-performance optical devices that require sub-μm positional accuracy of optical components.

{"title":"Study the shrinkage process of UV-curable adhesive using digital holographic interferometry","authors":"Varun Kumar , Ryoichi Ozono , Taisei Kishikawa , Katsuya Kito , Katsuhiro Iwasaki , Masayuki Yokota","doi":"10.1016/j.optlastec.2025.112746","DOIUrl":"10.1016/j.optlastec.2025.112746","url":null,"abstract":"<div><div>In this paper digital holographic interferometry (DHI) is implemented to study the shrinkage/hardening behavior of UV-curable acrylic adhesives. In the experiment, an aluminum plate as a reflective object was placed on top of the UV adhesive coating, and the temporal variation of the thickness of the UV adhesive coating during the curing process was determined from the vertical displacement of the aluminum plate using DHI. The effect of two different UV-illumination intensities on the curing process and shrinkage behavior were studied on two types of acrylic adhesives with different compositions and viscosity. In the case of first adhesive A, the experimentally calculated values of final shrinkage were 3.23 µm for the UV illumination intensity of 30 <span><math><mrow><mi>m</mi><mi>W</mi><mo>/</mo><msup><mrow><mi>c</mi><mi>m</mi></mrow><mn>2</mn></msup></mrow></math></span>, and 4.39 µm for UV illumination intensity of 50 <span><math><mrow><mi>m</mi><mi>W</mi><mo>/</mo><msup><mrow><mi>c</mi><mi>m</mi></mrow><mn>2</mn></msup></mrow></math></span>. While in case of second adhesive B, the measured final shrinkage values were 0.15 µm for the UV illumination intensity of 30 <span><math><mrow><mi>m</mi><mi>W</mi><mo>/</mo><msup><mrow><mi>c</mi><mi>m</mi></mrow><mn>2</mn></msup></mrow></math></span>, and 1.12 µm for the UV illumination intensity of 50 <span><math><mrow><mi>m</mi><mi>W</mi><mo>/</mo><msup><mrow><mi>c</mi><mi>m</mi></mrow><mn>2</mn></msup></mrow></math></span>. The proposed method for the experimental investigations of shrinkage behaviors/hardening process of UV-adhesives provides useful information for analyzing the curing behavior of adhesives in their developing stages. Also, the quantitative investigations of shrinkage behavior of adhesives are highly required for the assembly of high-performance optical devices that require sub-μm positional accuracy of optical components.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"186 ","pages":"Article 112746"},"PeriodicalIF":4.6,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An integrated laser system for manipulating trapped ions qubits

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-07 DOI: 10.1016/j.optlastec.2025.112694

Wei-Ran Ye , Jin-Ming Cui , Yan Chen , Yi-Long Chen , Rui-Rui Li , Yun-Feng Huang , Chuan-Feng Li , Guang-Can Guo

In experiments with atomic qubits encoded in the hyperfine levels of cold atoms or ions, the generation and control of multiple laser frequencies are often required for laser cooling and qubit manipulation. In this work, we demonstrate a laser system that integrates laser cooling, qubit initialization and detection, and Raman operations into a single setup, utilizing fiber laser technology and nonlinear optics. Specifically, a 369 nm laser for preparing and detecting

^{171} {Yb}^{+}

ions, and a 554 nm laser for qubit Raman manipulation, are generated by modulating a seed laser at 1108 nm through a fiber electro-optic modulator (EOM), amplified by a Yb-doped fiber amplifier, and then converted to 369 nm and 554 nm using two sequentially placed periodically-poled nonlinear crystals. This method offers significant flexibility and scalability, as different laser frequencies can be generated by adding specific radio-frequency signals to the electronic system, without altering the optical setup. The switching time between laser frequency channels is measured at 6.5 ns. With a modulation bandwidth of 20 GHz, this approach can accommodate the hyperfine splittings of various ion species. Overall, This scheme optimizes the optical configuration for atom and ion operations, minimizes insertion losses, and provides an efficient multi-channel laser frequency generation solution, making it highly beneficial for atomic and ionic quantum information experiments.

{"title":"An integrated laser system for manipulating trapped ions qubits","authors":"Wei-Ran Ye , Jin-Ming Cui , Yan Chen , Yi-Long Chen , Rui-Rui Li , Yun-Feng Huang , Chuan-Feng Li , Guang-Can Guo","doi":"10.1016/j.optlastec.2025.112694","DOIUrl":"10.1016/j.optlastec.2025.112694","url":null,"abstract":"<div><div>In experiments with atomic qubits encoded in the hyperfine levels of cold atoms or ions, the generation and control of multiple laser frequencies are often required for laser cooling and qubit manipulation. In this work, we demonstrate a laser system that integrates laser cooling, qubit initialization and detection, and Raman operations into a single setup, utilizing fiber laser technology and nonlinear optics. Specifically, a 369 nm laser for preparing and detecting <span><math><mrow><msup><mrow></mrow><mrow><mn>171</mn></mrow></msup><msup><mrow><mi>Yb</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math></span> ions, and a 554 nm laser for qubit Raman manipulation, are generated by modulating a seed laser at 1108 nm through a fiber electro-optic modulator (EOM), amplified by a Yb-doped fiber amplifier, and then converted to 369 nm and 554 nm using two sequentially placed periodically-poled nonlinear crystals. This method offers significant flexibility and scalability, as different laser frequencies can be generated by adding specific radio-frequency signals to the electronic system, without altering the optical setup. The switching time between laser frequency channels is measured at 6.5 ns. With a modulation bandwidth of 20 GHz, this approach can accommodate the hyperfine splittings of various ion species. Overall, This scheme optimizes the optical configuration for atom and ion operations, minimizes insertion losses, and provides an efficient multi-channel laser frequency generation solution, making it highly beneficial for atomic and ionic quantum information experiments.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"186 ","pages":"Article 112694"},"PeriodicalIF":4.6,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ground-state cooling of a magnomechanical system with levitated magnetic sphere

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-07 DOI: 10.1016/j.optlastec.2025.112663

Junxi Xu , Huiya Zhan , Aixi Chen , Wenjie Nie

In the paper, we investigate the ground-state cooling of a magnomechanical system with a levitated yttrium iron garnet sphere. The system is considered to be driven by the magnetic and microwave field pumps. Further, the suspension position of the sphere is biased by an additional Coulomb force, which is used to establish the effective phonon–magnon and photon–phonon couplings. We found that for the different pump schemes, the ground-state cooling of the levitated motion mode can be always realized by selecting the proper Coulomb forces to bias the sphere. We also discuss in detail the influence of the system parameters, such as the radius of the sphere, the driving power strength, the mechanical frequency, and the detunings of the cavity and magnon modes, on the cooling characteristics of the levitated motion mode. The results obtained her e have potential applications in the realization of the quantum coherence properties by the levitated magnomechanical setup.

引用次数: 0

High-fidelity in-line digital holography by hybrid constraints phase retrieval algorithm 采用混合约束相位检索算法的高保真在线数字全息技术

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-06 DOI: 10.1016/j.optlastec.2025.112754

Dayong Wang , Feifan Fan , Jie Zhao , Lu Rong , Yunxin Wang , Shufeng Lin

In-line digital holography (DH) achieves indirect detection of optical complex-amplitudes. Single-shot in-line DH via phase retrieval can obtain reconstructed complex field without twin image by exploring signal priors. However, these iterative projection methods based on single prior suffer from poor imaging fidelity. In this paper, we propose a novel hybrid constraints phase retrieval (HC-PR) algorithm to reconstruct the in-line digital hologram. In particular, the combined methods of the positive absorption, the total variation (TV) minimization, and the denoising regularization act as the prior constraints of the optimization framework to ensure the truth and robustness of the reconstructed complex-amplitude field. Moreover, distinguishing the signal region with the no-signal region enables high fidelity imaging of fractional hologram. The feasibility of our method is verified by the numerical simulation and the optical experiments. The HC-PR exhibits better reconstructed results compared with other popular methods, especially facing the fractional holograms. This new in-line digital holographic imaging approach provides a simple and efficient solution for the design of lensless imaging.

{"title":"High-fidelity in-line digital holography by hybrid constraints phase retrieval algorithm","authors":"Dayong Wang , Feifan Fan , Jie Zhao , Lu Rong , Yunxin Wang , Shufeng Lin","doi":"10.1016/j.optlastec.2025.112754","DOIUrl":"10.1016/j.optlastec.2025.112754","url":null,"abstract":"<div><div>In-line digital holography (DH) achieves indirect detection of optical complex-amplitudes. Single-shot in-line DH via phase retrieval can obtain reconstructed complex field without twin image by exploring signal priors. However, these iterative projection methods based on single prior suffer from poor imaging fidelity. In this paper, we propose a novel hybrid constraints phase retrieval (HC-PR) algorithm to reconstruct the in-line digital hologram. In particular, the combined methods of the positive absorption, the total variation (TV) minimization, and the denoising regularization act as the prior constraints of the optimization framework to ensure the truth and robustness of the reconstructed complex-amplitude field. Moreover, distinguishing the signal region with the no-signal region enables high fidelity imaging of fractional hologram. The feasibility of our method is verified by the numerical simulation and the optical experiments. The HC-PR exhibits better reconstructed results compared with other popular methods, especially facing the fractional holograms. This new in-line digital holographic imaging approach provides a simple and efficient solution for the design of lensless imaging.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"186 ","pages":"Article 112754"},"PeriodicalIF":4.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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