Optics Communications最新文献

英文中文

Ultrasensitive fiber optic dual parametric sensor based on harmonic Vernier effect

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-11 DOI: 10.1016/j.optcom.2025.131508

Tengfei Wang , Cheng Zuo , Yuanzi Wang , Xiaopeng Liu , Qiliang Xia , Jun Zhu , Xuqiang Wu , Jiatong Luo , Benli Yu

An ultrasensitive fiber optic dual parametric sensor based on harmonic Vernier effect is proposed and experimentally demonstrated, consisting of a fiber Sagnac interferometer (FSI) cascaded with a Fabry-Perot interferometer (FPI). The sensing interferometer FSI is fabricated by splicing a high birefringence polarization-maintaining fiber (Hi-Bi PMF) and a fiber coupler. The FPI is manufactured by splicing a segment of Hollow Core Photonic Crystal Fiber (HCPCF) between two Single Mode Fibers (SMFs). It is temperature insensitive and can be utilized as a reference interferometer. The Harmonic Vernier effect is obtained by adjusting the length of the HCPCF to change the optical path length (OPL) difference between the two interferometers, and the effect of the detuning factor on the sensitivity is verified by the experiment. The results of the experimentation reveal that the sensitivities of the proposed sensors to temperature and strain are −62.298 nm/°C and 134.97 pm/με, respectively, with low discrimination errors of ±0.0007 °C and ±0.041 με. With its high sensitivity, low cost, and simple structure, this sensor has great potential in industrial manufacturing and environmental detection applications.

{"title":"Ultrasensitive fiber optic dual parametric sensor based on harmonic Vernier effect","authors":"Tengfei Wang , Cheng Zuo , Yuanzi Wang , Xiaopeng Liu , Qiliang Xia , Jun Zhu , Xuqiang Wu , Jiatong Luo , Benli Yu","doi":"10.1016/j.optcom.2025.131508","DOIUrl":"10.1016/j.optcom.2025.131508","url":null,"abstract":"<div><div>An ultrasensitive fiber optic dual parametric sensor based on harmonic Vernier effect is proposed and experimentally demonstrated, consisting of a fiber Sagnac interferometer (FSI) cascaded with a Fabry-Perot interferometer (FPI). The sensing interferometer FSI is fabricated by splicing a high birefringence polarization-maintaining fiber (Hi-Bi PMF) and a fiber coupler. The FPI is manufactured by splicing a segment of Hollow Core Photonic Crystal Fiber (HCPCF) between two Single Mode Fibers (SMFs). It is temperature insensitive and can be utilized as a reference interferometer. The Harmonic Vernier effect is obtained by adjusting the length of the HCPCF to change the optical path length (OPL) difference between the two interferometers, and the effect of the detuning factor on the sensitivity is verified by the experiment. The results of the experimentation reveal that the sensitivities of the proposed sensors to temperature and strain are −62.298 nm/°C and 134.97 pm/με, respectively, with low discrimination errors of ±0.0007 °C and ±0.041 με. With its high sensitivity, low cost, and simple structure, this sensor has great potential in industrial manufacturing and environmental detection applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"579 ","pages":"Article 131508"},"PeriodicalIF":2.2,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Generation of a noise-like pulse from an all-polarization-maintaining Er fiber laser in a Figure-eight configuration with a nonlinear amplifying loop mirror

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-11 DOI: 10.1016/j.optcom.2025.131507

Hikaru Yamamoto, Yoshiaki Takiguchi, Hiroyuki Toda, Masayuki Suzuki

We have experimentally demonstrated a generation of a self-started noise-like pulse (NLP) in an all-polarization-maintaining Er-doped fiber (PM-EDF) laser with a nonlinear amplifying loop mirror in a Figure-8 configuration. By controlling the length of the normal dispersion fiber in the cavity, the NLP average output power of 5.70 mW with a spectral bandwidth of 2.2 nm at a repetition rate of 3.08 MHz was obtained. An autocorrelation trace of the NLP contained long and short pulses, typical features of the NLP. The output NLP was amplified by a homemade normal dispersion PM-EDF amplifier, resulting in an output average output power of 216 mW with a spectral bandwidth of 3.2 nm. This developed NLP is well-suitable for pump sources of supercontinuum generation.

引用次数: 0

Progress in Er-doped fibers for extended L-band operation of amplifiers

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-11 DOI: 10.1016/j.optcom.2025.131510

Ziwei Zhai, Jayanta K. Sahu

Erbium (Er)-doped fiber amplifiers (EDFAs) have revolutionized optical fiber communication, facilitating long-distance, large-capacity, and high-reliability data transmission. The explosive growth in transmission capacity, particularly in dense-wavelength-division-multiplexed (DWDM) communication systems, necessitates the development of efficient EDFAs beyond the C-band (1530–1565 nm) and traditional L-band (1565–1610 nm). However, the expansion of bandwidth is limited by signal-induced excited-state absorption (ESA) effects in EDFs, highlighting the importance of optimizing fiber core compositions with appropriate co-dopants and concentrations in designing extended L-band EDFs. High-performance EDFAs in the extended L-band require improvements in gain, bandwidth, noise figure, and efficiency. This paper reviews the spectroscopic properties of EDFs in alumino-silicate, phospho-silicate, and ternary AlPO₄–SiO₂ glass hosts, with a particular focus on ESA effects. We review the current state of the art of extended L-band EDFAs in single-stage amplification, emphasizing silica-based glass hosts with tailored material compositions of the fiber core. Various novel co-dopants are discussed, like ytterbium (Yb), cerium (Ce), and yttrium (Y). We also explore the optimization on the pump wavelengths and amplification schemes, including single-pass and double-pass configurations. In addition, this review addresses both the temperature and radiation effects of L-band EDFAs, demonstrating the potential of radiation-resistant EDFAs for advancing aerospace-based optical communications.

{"title":"Progress in Er-doped fibers for extended L-band operation of amplifiers","authors":"Ziwei Zhai, Jayanta K. Sahu","doi":"10.1016/j.optcom.2025.131510","DOIUrl":"10.1016/j.optcom.2025.131510","url":null,"abstract":"<div><div>Erbium (Er)-doped fiber amplifiers (EDFAs) have revolutionized optical fiber communication, facilitating long-distance, large-capacity, and high-reliability data transmission. The explosive growth in transmission capacity, particularly in dense-wavelength-division-multiplexed (DWDM) communication systems, necessitates the development of efficient EDFAs beyond the C-band (1530–1565 nm) and traditional L-band (1565–1610 nm). However, the expansion of bandwidth is limited by signal-induced excited-state absorption (ESA) effects in EDFs, highlighting the importance of optimizing fiber core compositions with appropriate co-dopants and concentrations in designing extended L-band EDFs. High-performance EDFAs in the extended L-band require improvements in gain, bandwidth, noise figure, and efficiency. This paper reviews the spectroscopic properties of EDFs in alumino-silicate, phospho-silicate, and ternary AlPO<sub>4</sub>–SiO<sub>2</sub> glass hosts, with a particular focus on ESA effects. We review the current state of the art of extended L-band EDFAs in single-stage amplification, emphasizing silica-based glass hosts with tailored material compositions of the fiber core. Various novel co-dopants are discussed, like ytterbium (Yb), cerium (Ce), and yttrium (Y). We also explore the optimization on the pump wavelengths and amplification schemes, including single-pass and double-pass configurations. In addition, this review addresses both the temperature and radiation effects of L-band EDFAs, demonstrating the potential of radiation-resistant EDFAs for advancing aerospace-based optical communications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131510"},"PeriodicalIF":2.2,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compressive light field photography with high spatial-angular resolution based on single-pixel imaging

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-11 DOI: 10.1016/j.optcom.2025.131511

Wei Feng, Xingang Li, Jiangtao Xu, Yi Wang, Zhongsheng Zhai

In this paper, a novel compressive light field photography method based on single-pixel imaging is proposed to achieve high spatial-angular resolution under compressive sampling. Specifically, a digital micromirror device is used to modulate the spatial information of the target scene, while a camera is regarded as a single-pixel camera array to record the angular information of the light rays. Different Hadamard orderings and compressive sensing are respectively used to compress the sampling rate, and the parallax calculation method for each perspective of our hardware system is presented to realize the digital refocusing, which can demonstrate the accuracy of our light field photography. The experimental results show that our method can achieve light field photography with a high spatial-angular resolution of 128 × 128 spatial and 96 × 96 angular resolutions at a 10% sampling rate. Theoretically, if a high-speed camera is used, our spatial resolution can easily reach 1920 × 1080 pixels. Notably, this approach resolves the trade-off between spatial and angular resolution encountered in microlens array-based light field cameras, significantly reduces time, data storage requirements, and computational costs, and it provides a novel solution for light field photography with high spatial-angular resolution.

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引用次数: 0

Direct computational ghost imaging via speckle patterns based on multi-social genetic algorithm

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-11 DOI: 10.1016/j.optcom.2024.131465

Lingyun Zhu , Longfei Yin , Xikang Cui , Wenting Yu , Lei Chen , Haoyu Ge , Guohua Wu

We have proposed a direct computational imaging method via speckle patterns based on a multi society genetic algorithm. Decomposing the reconstruction problem of computational ghost imaging into two objectives, we introduce the multi-society genetic algorithm, enabling the reconstructed object image to be updated in the form of speckle patterns. The results demonstrate that this method can achieve a high quality reconstructed image. Compared with existing methods, our approach can improve the Peak Signal-to-Noise Ratio (PSNR) by up to 4.6 dB in experimental settings. This is beneficial for promoting biomedical imaging and developing integrated single pixel cameras.

引用次数: 0

Parallel processing of FBG spectral distortion recognition and temperature demodulation based on multi-task learning

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-10 DOI: 10.1016/j.optcom.2025.131505

Rui Tang, Hong Jiang, Zepu Cao

In distributed fiber Bragg grating (FBG) sensing networks, sensing accuracy and reliability depend on the quality of the FBG reflection spectrum. However, environmental noise, spectral distortion, and low signal resolution will inevitably affect the spectral quality. Therefore, this article proposes a demodulation method that combines cubic spline interpolation (CSI) with a one-dimensional convolutional neural network (1-DCNN) model to alleviate the above problems. In this paper, the CSI algorithm is used to improve the signal resolution of the FBG sensing network without modifying the hardware conditions, which can effectively improve the quality of various spectra. At the same time, the deep features are extracted from the full spectrum of FBG, and the 1-DCNN model is used as a shared framework combined with multi-task learning. The powerful nonlinear fitting ability of the model can realize the parallel task of distortion spectrum recognition and temperature demodulation. The simulation experiment results show that the signal resolution is effectively improved to 1 p.m., which is better than cubic polynomial and Hermite interpolation. The 1-DCNN model effectively integrates dual tasks, achieving fast and accurate recognition and demodulation of FBG spectra. The accuracy of all classification tasks reached 0.99875, and root mean square error (RMSE) of 0.32256 °C was also achieved for temperature prediction tasks. In addition, when using distorted spectra with different SNRs and initial resolutions as inputs, good comprehensive performance was achieved, which is superior to other machine learning models.

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引用次数: 0

Wideband non-degenerate two-photon absorption in low-loss multimode silicon waveguides for nonlinear optical tuning between C and 2-μm wavebands

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-10 DOI: 10.1016/j.optcom.2025.131506

Zhaonian Wang , Jiangbing Du , Ke Xu , Zuyuan He

All-optical signal processing has a wide range of applications in optical computing, communication, switch and so on, where intensity modulation is highly desired. In this work, we propose and demonstrate a study of all-optical intensity modulation via nonlinear tuning based on two photo absorption (TPA) between C and 2-μm wavebands. By using multimode silicon waveguide with Euler bends for low-loss optimization, we design and fabricate a 12.3-cm silicon waveguide, achieving a minimum propagation loss of 0.23 dB/cm at C band and 0.87 dB/cm at 2-μm waveband. The waveguide is fabricated over 220-nm silicon-on-insulator (SOI) platform. 8.9 dB extinction ratio (ER) of TPA is experimentally realized above a 400-nm spectral distance at 2-μm waveband with a C-band pump. A mode loop structure assisted by mode-division-multiplexing (MDM) is proposed to enhance the TPA effect, with 1.6-dB extra ER improvement obtained.

引用次数: 0

Visible light positioning system based on stacking learning model

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-10 DOI: 10.1016/j.optcom.2025.131479

Ye Tian , Lei Jing , Zhengrong Tong , Kun Yang , Dandan Huang , Peng Li , Xue Wang , Hao Wang , Zhonghan Wang , Yongsheng Jiang

In the field of Visible Light Positioning (VLP), ensemble learning algorithms can improve positioning accuracy. Among these, stacking learning models reduce the overfitting issues that may occur with individual models by integrating multiple algorithms, thereby making the model more robust in positioning systems. This paper proposes a three-dimensional visible light positioning scheme based on a stacking ensemble learning algorithm. The scheme uses Weighted K-Nearest Neighbors (WKNN) and Extreme Learning Machine (ELM) as base learners, with Linear Regression (LR) as the meta-learner. By integrating the advantages of different algorithms, it enhances the accuracy of indoor positioning. Experimental results show that in a 2.4 m

\times

2.4 m

\times

1.5 m indoor environment, the VLP system using this scheme achieved an average positioning error of 0.021 m, which is significantly better than traditional single algorithms. Particularly, even under varying lighting conditions, the stacking algorithm maintained high accuracy, verifying its adaptability in complex environments. These results demonstrate the feasibility and advantages of the proposed scheme for practical applications.

{"title":"Visible light positioning system based on stacking learning model","authors":"Ye Tian , Lei Jing , Zhengrong Tong , Kun Yang , Dandan Huang , Peng Li , Xue Wang , Hao Wang , Zhonghan Wang , Yongsheng Jiang","doi":"10.1016/j.optcom.2025.131479","DOIUrl":"10.1016/j.optcom.2025.131479","url":null,"abstract":"<div><div>In the field of Visible Light Positioning (VLP), ensemble learning algorithms can improve positioning accuracy. Among these, stacking learning models reduce the overfitting issues that may occur with individual models by integrating multiple algorithms, thereby making the model more robust in positioning systems. This paper proposes a three-dimensional visible light positioning scheme based on a stacking ensemble learning algorithm. The scheme uses Weighted K-Nearest Neighbors (WKNN) and Extreme Learning Machine (ELM) as base learners, with Linear Regression (LR) as the meta-learner. By integrating the advantages of different algorithms, it enhances the accuracy of indoor positioning. Experimental results show that in a 2.4 m <span><math><mo>×</mo></math></span> 2.4 m <span><math><mo>×</mo></math></span> 1.5 m indoor environment, the VLP system using this scheme achieved an average positioning error of 0.021 m, which is significantly better than traditional single algorithms. Particularly, even under varying lighting conditions, the stacking algorithm maintained high accuracy, verifying its adaptability in complex environments. These results demonstrate the feasibility and advantages of the proposed scheme for practical applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131479"},"PeriodicalIF":2.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Design and optimization of a grating-free external cavity diode laser with over 6 THz phase-continuous tunability

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-09 DOI: 10.1016/j.optcom.2025.131504

Jiuyuan Zhu , Yang Gao , Bo Zhang , Zhongwen Deng , Yuanlong Fan , Xinjian Zhang , Adam Jones , Nigel Copner , Kang Li

A novel grating-free tunable external cavity diode laser has been designed and optimized, featuring an impressive phase-continuous tuning range exceeding 6 THz. The laser cavity is constructed from two sets of right-angled mirrors arranged in a rectangular configuration. These mirrors are symmetrically positioned relative to the central axis and are parallel in pairs, effectively forming two periscopic assemblies. Wavelength adjustment is achieved by rotating a double-sided mirror positioned centrally within the mirror sets, and an etalon is utilized as the wavelength selector. This pivot-point-free rotation simultaneously tunes both the cavity length and the etalon mode wavelength, ensuring high synchronization between the two. With a low refractive index material used for the etalon, the tuning range can theoretically extend up to 6.022 THz.

引用次数: 0

Advancing optomechanical sensing: Novel CMOS-compatible plasmonic pressure sensor with Silicon-Insulator-Silicon waveguide configuration

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications

Pub Date : 2025-01-09 DOI: 10.1016/j.optcom.2025.131495

Abdullah Taharat, Mohammad Abrar Kabir, Aseer Imad Keats, A.K.M. Rakib, Rakibul Hasan Sagor

This article introduces a novel Complementary Metal Oxide Semiconductor (CMOS) compatible plasmonic optical pressure sensor featuring a Silicon-Insulator-Silicon (SIS) waveguide configuration. The sensor design incorporates a railtrack resonator coupled to a straight waveguide with gratings, further enhanced by embedding silicon nanorods into the waveguide and resonator cavity. Finite element method (FEM) was used to perform numerical investigation and evaluate the performance of our sensor. The proposed sensor exhibits a pressure sensitivity of 51.075 nm/MPa, surpassing that of previous silver-based sensors and showcasing the potential of silicon in plasmonic sensing applications. Moreover, this work represents the first instance of employing CMOS-compatible silicon for designing an optical pressure sensor, thereby bridging the gap between plasmonic optomechanical sensors and nanoelectronics while circumventing the compatibility issues typically associated with metals in standard CMOS fabrication processes. By leveraging silicon as a plasmonic material, we have effectively addressed the constraints, such as lack of tunability and poor optical and thermal stability, that are suffered by traditional metal-based sensors. Moreover, building upon the recent advancements in silicon photonics, the need for setting up new manufacturing infrastructures for novel materials, such as transition metal nitrides, is overcome by the use of silicon due to the well-established fabrication facility of the silicon industry. The sensor’s versatility and impact across diverse domains are highlighted by its potential applications, including gas leakage detection, flow rate measurement and refractive index sensing for early diagnosis of organ rejection post-transplantation.

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