Optics and Laser Technology最新文献

英文中文

Design of freeform off-axis telescope with low tilt-to-length noise based on construction method

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-17 DOI: 10.1016/j.optlastec.2025.112821

Hao Tan , Zichao Fan , Huiru Ji , Yan Mo , Donglin Ma

In this paper, we propose a design methodology for low tilt-to-length (TTL) noise freeform off-axis telescopes, aimed at enhancing performance in space-based gravitational wave (GW) detection. Our design integrates advanced freeform surfaces to reduce TTL noise and improve optical quality, which is crucial for the requirements of GW detection mission. The novelty of our approach lies in the construction method, which directly computes the optical parameters, enabling simultaneous consideration of wavefront error (WFE) and TTL noise. This contrasts traditional optimization methods, which often handle these aspects sequentially, leading to inefficiencies and potential increases in design time. By incorporating TTL noise considerations at the design stage, our method significantly enhances the predictability and efficiency of the telescope design process. Based on this method, we present an off-axis telescope design which demonstrates that the root-mean-square (RMS) wavefront error remains well within the requirements of GW detection missions across the scientific field of view (FOV), and the TTL noise is maintained below the threshold across a wide operational range. The RMS WFE of the designed system is lower than 0.0025λ within the scientific FOV of ±7μrad. The maximum TTL noise within FOV of ±300μrad is less than 0.025 nm/rad.

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引用次数: 0

Manipulating nanoparticles by coupling wedge and plasmonic modes on non-uniformly biased graphene strips

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-17 DOI: 10.1016/j.optlastec.2025.112815

Behnam Okhravi, Mostafa Ghorbanzadeh

Realizing tunable high intensified and localized multiple hot spots are crucial for developing integrated optical tweezers in lab-on-a-chip devices to study interparticle interactions, routing and delivering nanoparticles. In this work, we utilize from a wedge-shaped Si structure to create and guide an extremely localized optical wedge mode and also as a non-uniform gate to non-uniformly control the chemical potential of topped graphene strips. Using three-dimensional finite-difference time-domain numerical method, we show that the wedge mode can excite localized surface plasmon (LSP) modes on the surface of each graphene strips with two distinct hot spots (trapping sites). The position of the trapping sites can be electrically manipulated continuously along the length of each graphene strip and discretely along the direction of propagation of the wedge mode by tuning the gate voltage. The calculated plasmonic forces by Maxwell stress tensor (MST) method reveals that 7 V change in the gate voltage leads to displacement of trapped particles by ∼ 49 nm. Moreover, we show that in the proposed structure by smoothly varying the gate voltage of graphene strips, active plasmonic focusing and defocusing lenses can be realized. We believe the proposed system can be implemented in lab-on-a-chip devices for electrically manipulating multiple nanoparticles without the need to use large scale expensive optical instruments.

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引用次数: 0

A review on dissipative optical solitons: A route to photo-bot

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-17 DOI: 10.1016/j.optlastec.2025.112647

Prashant Singh, K. Senthilnathan

The article delves into the intriguing realm of soliton molecules in the dissipative systems where we initially discuss the formation of solitons in optical fibers and their fundamental dynamics within integrable models. It then sheds light on dissipative nonlinear optical cavities and fiber lasers, lauded as ideal testbeds for studying the complex and captivating dynamics of dissipative solitons. The review comprehensively examines research on dissipative optical dynamics, encompassing dissipative solitons, soliton molecules, complexes, and crystals. The article illuminates research on light bullets in nonlinear dissipative systems in the remarkable discovery of spatiotemporal soliton molecules and (3 + 1)D soliton crystals. Finally, it emphasizes how a deep understanding and control over the dynamics of soliton molecules could unlock the potential for optimizing “quasi-intelligence” within these intriguing light formations. Building upon the past and recent breakthroughs, we propose the concept of “Photo-bots” – intelligence in interacting solitons and soliton molecules, inspired by nanobots. In contrast to nanobots, which are physical machines interacting with molecules through physical or chemical means, photo-bots are highly controlled and localized light that could play an indispensable role at the quantum level and can modulate the quantum states of atoms and molecules and promises to have several other advanced applications.

文章深入探讨了耗散系统中的孤子分子这一引人入胜的领域，首先讨论了光纤中孤子的形成及其在可积分模型中的基本动力学。然后，文章介绍了耗散非线性光腔和光纤激光器，它们被誉为研究复杂而迷人的耗散孤子动力学的理想试验平台。这篇综述全面考察了耗散光学动力学研究，包括耗散孤子、孤子分子、复合物和晶体。文章从时空孤子分子和 (3 + 1)D 孤子晶体的非凡发现中，阐明了非线性耗散系统中的光子弹研究。最后，它强调了对孤子分子动力学的深入理解和控制如何在这些引人入胜的光形式中释放出优化 "准智能 "的潜力。在过去和近期突破的基础上，我们提出了 "光机器人"（Photo-bots）的概念--受纳米机器人的启发，在相互作用的孤子和孤子分子中实现智能。纳米机器人是通过物理或化学手段与分子相互作用的物理机器，与之不同的是，光机器人是高度受控和局部化的光，可以在量子层面发挥不可或缺的作用，可以调节原子和分子的量子状态，并有望有其他一些先进的应用。

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引用次数: 0

An approach for improving the distorted structured light in holographic optical tweezers

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-17 DOI: 10.1016/j.optlastec.2025.112804

Yida Song, Zhengshu Zhang, Yi Shen, Xionggui Tang

Optical tweezers have been widely used for optical manipulation of various particles. At present, there are different type of optical tweezers. Among them, holographic optical tweezers have attracted growing attention as a powerful tools for optical trapping, optical transportation and optical sorting in many fields, due to its excellent properties including great flexibility and high convenience. Experimentally, however, the structured light has been easily distorted, which would lead to serious degradation of optical manipulation performance. In this work, the distortion of structured light is theoretically analyzed. In the following, the distortion of structured light are numerically simulated and experimentally measured. It shows that the simulated results are in consistent with the experimental ones. Then, an approach for decreasing its optical distortion is proposed, and the results reveal that the distortion of structured light can be effectively corrected. Accordingly, our study provides a way for improving the distorted structured light, which is useful for optically manipulating various particles in optical tweezers.

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引用次数: 0

Positive-feedback amplification of weak laser pulses

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-17 DOI: 10.1016/j.optlastec.2025.112828

Yuanzhuang Bu , Bin Zhang , Jing Hou

Pulsed fiber amplifiers are essential components of high-power pulsed fiber laser systems. To the best of our knowledge, we first propose a type of positive-feedback pulsed fiber amplifier to efficiently amplify weak laser pulses. Positive-feedback mechanism is actively established by the backward time-shifted superposition of seed pulses and feedback pulses. Since the greatly enhanced net input pulses can consume more excited particles to promote excited radiation and suppress spontaneous radiation, our positive-feedback pulsed fiber amplifier achieves a unique near-exponential growth in power curve, higher single-stage gain (17.4 dB, increase of 5.1 dB), and higher pump-to-signal conversion efficiency (19.1 %, increase of 14.6 %) than conventional pulsed fiber amplifiers.

引用次数: 0

Chirality-induced tunable quasi-Brewster angle and anomalous photonic spin-Hall effect

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-17 DOI: 10.1016/j.optlastec.2025.112811

Qiang Zhou, Yawei Tan, Lijuan Sheng, Yong Cao, Zhiteng Wang, Xiaohui Ling

The photonic spin Hall effect (PSHE) has demonstrated significant application potential in precision metrology, sensing, edge imaging, and spin-optical devices. The majority of these applications have focused on optical systems exhibiting either the Brewster or quasi-Brewster effect. Consequently, the flexible adjustment of the quasi-Brewster angle has emerged as a pivotal concern in manipulating the PSHE and expanding its applications. Here, by studying the scattering of a linearly polarized beam incident on an air-chiral interface, we find that the quasi-Brewster angle can be tuned by the chirality parameter κ and induces an anomalous PSHE. This anomalous PSHE manifests as both asymmetric out-of-plane and additional in-plane spin-Hall shifts. Specifically, the real part of κ, which is related to optical activity, results in a separation of the quasi-Brewster angles for left- and right-handed circularly polarized components, leading to asymmetric out-of-plane shifts. The additional in-plane shifts are induced by the circular dichroism of the chiral materials, which is dictated by the imaginary part of κ. This anomalous PSHE can be attributed to the destructive interference between normal and abnormal modes within the scattered beam under linear polarization incidence. Furthermore, we illustrate potential applications of chirality-modulated PSHE in encoding and encryption. Our findings offer additional degrees of freedom for controlling the PSHE, paving the way for advancements in spin-related photonics applications.

光子自旋霍尔效应（PSHE）已在精密计量、传感、边缘成像和自旋光学设备方面展现出巨大的应用潜力。这些应用大多集中在显示布儒斯特效应或准布儒斯特效应的光学系统上。因此，灵活调整准布儒斯特角已成为操纵 PSHE 和扩大其应用范围的关键问题。在这里，通过研究入射到空气手性界面上的线性偏振光束的散射，我们发现准布鲁斯特角可以通过手性参数κ进行调整，并诱导出反常的 PSHE。这种反常的 PSHE 表现为平面外的不对称和额外的平面内自旋-霍尔位移。具体来说，κ 的实部与光学活性有关，它导致左旋和右旋圆偏振分量的准布鲁斯特角分离，从而产生非对称平面外偏移。额外的面内偏移是由手性材料的圆二色性引起的，而圆二色性是由κ的虚部决定的。这种反常的 PSHE 可归因于线性偏振入射下散射光束内正常模式和异常模式之间的破坏性干扰。此外，我们还说明了手性调制 PSHE 在编码和加密中的潜在应用。我们的发现为控制 PSHE 提供了额外的自由度，为自旋相关光子学应用的进步铺平了道路。

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引用次数: 0

Highly stable modular-assembled laser system for a dual-atom-interferometer gyroscope

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-16 DOI: 10.1016/j.optlastec.2025.112771

Chuan Sun , Si-Bin Lu , Min Jiang , Zhan-Wei Yao , Shao-Kang Li , Xiao-Li Chen , Min Ke , Jia-Hao Fu , Run-Bing Li , Jin Wang , Ming-Sheng Zhan

Operating atom-interferometer gyroscopes outside a laboratory environment is challenging primarily owing to the instability of laser systems. To enhance the thermal stability of free-space laser systems, a compact laser system using fiber lasers and all-quartz-jointed optical modules was developed for a dual-atom-interferometer gyroscope. Millimeter-scale optical elements jointed on quartz plates with identical quartz supports, ensure laser power stability and facilitate component upgrades. The primary diode laser was locked to the modulation transfer spectrum of Rb atoms, and Raman lasers were phase-locked to the primary laser. Frequencies for repumping, blow-away, and detection lasers were adjusted with acousto-optic modulators. At room temperature, laser power fluctuation was under 1:1000, polarization extinction ratio exceeded 30 dB, frequency fluctuation was below 91 kHz, and phase noise reached to

- 100

dBc/Hz

@

1 kHz. The optical modules were tested at 5–50

°

C and applied to a dual-atom-interferometer gyroscope. The fringe contrast was tested over the temperature range. The proposed system paves the way for promoting field applications of atom-interferometer sensors.

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引用次数: 0

Optimizing Under-Sampling in Fourier Single-Pixel imaging using GANs and attention mechanisms

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-16 DOI: 10.1016/j.optlastec.2025.112752

Zihao Wang, Yongan Wen, Yu Ma, Wei Peng, Yang Lu

Single-Pixel Imaging (SPI) is an emerging imaging technique with unique advantages, but Fourier Single-Pixel Imaging (FSPI) still faces challenges in improving sampling efficiency and reconstruction quality. The generation of modulation patterns in FSPI typically requires the creation of a linear sampling space, and consequently, the complexity of the sampling space directly impacts the imaging efficiency of FSPI. This paper proposes an FSPI under-sampling optimization method based on Generative Adversarial Networks (GANs) and attention mechanisms, aiming to dynamically generate optimized sampling masks and enhance reconstruction efficiency. Unlike existing end-to-end approaches, this method employs a GANs and Monte Carlo model to directly generate sampling masks instead of images, providing greater flexibility and optimization potential. The generator adopts U-net with ResBlock structure to enhance gradient propagation. This method can capture details and high-frequency information in the image, consequently improving the reconstruction quality. Moreover, through adversarial training, the generator can produce diverse and realistic sampling patterns, thus enhancing the generalization ability of the model. The effectiveness and superiority of this method have been validated by various experiments. In the optical experimental part, we designed a scattering media SPI system to validate the proposed method and compared and analyzed the optimal detector gains. Notably, our method demonstrated excellent adaptability in scattering media conditions, achieving high-quality image reconstruction even in the presence of A4 paper and a water tank as scattering media. This research provides new insights and solutions for the application of deep learning in FSPI under-sampling optimization, particularly in complex imaging environments.

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引用次数: 0

Propagation of autofocusing Airy vortex beams with quadratic phase modulation

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-16 DOI: 10.1016/j.optlastec.2025.112759

Qian Zhang, Qixuan Chen, Haolong He, Hanqiang Qin, Guangting Yao, Zhijie Xu, Kaiyun Zhan

The formation of autofocusing Airy beams (AABs) that carrying a new kind of power-exponent-phase vortices (NPEPVs) with quadratic phase modulation (QPM) is demonstrated. The physical mechanisms of the beams are analyzed by using the theories of intensity distribution and phase distribution. The QPM parameter affects the initial phase distribution, causing the vortex phase winding rotate in different clockwise directions; its absolute value determines the autofocusing position of the beam during propagation. In the case of positive QPM, the phase appears as a nested structure after the beam is autofocused. Conversely, for negative QPM beam, the phase distribution of the beam rotates anticlockwise during propagation. The proposed AABs carrying NPEPVs with QPM will have potential applications in optical manipulation and particle trapping.

引用次数: 0

Force-sensitive optical fiber fabric based on hollow elastic tube and structural grating

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology

Pub Date : 2025-03-15 DOI: 10.1016/j.optlastec.2025.112792

Cheng Zhang , Tian Gao , Xiaoyu Wen , Yuanhua Li , Meiling Zhang , Jun Xu , Hongqiang Li , Huiying Su , Jinlu Sun

To address the challenge of achieving a wide force measurement range and high sensitivity in most flexible sensors, a force-sensitive optical fiber sensor (FSOFS) is proposed based on a hollow elastic tube (HET) and structural grating. A larger-diameter HET is sandwiched between U-shaped polymer optical fibers, and positioned close to a structural grating by slotting. The transverse deformation of the HET causes the bending variations of the structural grating and modulates the light intensity. Simulation and experiment results demonstrate that FSOFS can independently adjust force measurement range and sensitivity by varying the inner and outer radii of the HET and the number of structural grating slots. The FSOFS is integrated as weft yarn to fabricate a force-sensitive optical fiber fabric (FSOFF) for the wearable applications. Experimental results indicate that the FSOFF exhibits high force sensitivity (50.294/N), a wide linear detection range (0 ∼ 1.534 N), as low as 8 mN force detection limit enabling the measurement of subtle variations in body surface pressure. Additionally, the FSOFF embodies low hysteresis error (less than 6.7 %) and excellent consistency in 5400 repeated loading tests. Finally, FSOFF has been successfully applied to wrist pulse detection, fist action recognition, joint curvature sensing and fabric keyboard applications, validating its promising prospects in medical rehabilitation, human–machine interaction and other fields.

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引用次数: 0

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