Optics express最新文献

{"title":"Asymmetrical dual-point pumped ceramic Nd:YAG rotary disk laser.","authors":"Bin Xie, Wenlan Gao, Yuefei Li, Weilin Cao, Jian Zhang, Dawei Zhang, Jianlang Li","doi":"10.1364/OE.563461","DOIUrl":"https://doi.org/10.1364/OE.563461","url":null,"abstract":"<p><p>In this study, asymmetrical dual-point pumping was proposed to be used in the rotary disk laser to improve the laser performance by controlling the spatial separation between the two heat deposition rings inside the rotary gain medium. To validate this method, a 1064-nm ceramic Nd:YAG rotary disk laser was investigated by analyzing the effect of the rotation radii of two pumping points and rotation rates on laser performance. Using dual-point pumping at different rotation radii of 9 mm and 6 mm, with respective pump powers of 18.6 W and 17.0 W, the laser emitted 10.3-W power with 32.7-% slope efficiency at an optimal rotation rate of 800 rpm. After comparing it with symmetrical dual-point pumping and single-point pumping, it was shown that asymmetrical dual-point pumping could be used for further power scaling of the rotary disk laser with good stability.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"23980-23990"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294492","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}

{"title":"Augmented spectrum bandwidth of Nd-doped garnet and bixbyite by spectrum tailoring.","authors":"Yoichi Sato, Takunori Taira","doi":"10.1364/OE.554538","DOIUrl":"https://doi.org/10.1364/OE.554538","url":null,"abstract":"<p><p>Although Nd-doped garnet and bixbyite are well-known solid-state laser gain media due to their promising characteristics, they have a clear shortcoming of narrow emission bandwidth from the viewpoint of ultrafast pulse generation. In this work, we estimated the possible designable bandwidth by the spectral tailoring of Nd-doped garnet and bixbyite. Based on the evaluation of fluorescent spectra from Nd³⁺ in the various kinds of ordered and disordered host ceramics with the composition of Y_xLu_2-xO₃, Y_xGd_2-xO₃, Lu_xGd_2-xO₃, Y₃Al_xSc_5-xO₁₂, Y₃Al_xGa_5-xO₁₂, Y_xLu_3-xAl₅O₁₂, Y_xGd_3-xAl₅O₁₂, and Lu_xGd_3-xAl₅O₁₂, we concluded 6-nm spectral bandwidth was possible by use of the stacked composite of at least four kinds of Nd-doped garnet crystals. In addition, we discovered the improvement of the designability and the augmentation of the bandwidth by the temperature tuning of the stacked composite. Consequently, a 6-nm emission bandwidth was demonstrated using the stacked composite of Nd:Gd₃Ga₅O₁₂, Nd:Y₃ScAl₄O₁₂, Nd:Y₃Sc₂Al₃O₁₂, and Nd:Y₃Al₅O₁₂.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"24050-24059"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294493","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}

{"title":"Crosstalk model of division of focal plane polarization cameras: optical causes and parameter effects.","authors":"Jiaan Xue, Su Qiu, Weiqi Jin, Xia Wang, Lin Luo, Qiwei Liu","doi":"10.1364/OE.564058","DOIUrl":"https://doi.org/10.1364/OE.564058","url":null,"abstract":"<p><p>The division of focal plane polarization cameras is a widely used integrated polarization imaging system, where light intensity crosstalk between micro-polarizer pixels introduces measurement errors. Previous studies have only assessed qualitative crosstalk trends. Here, we model crosstalk as near-field, non-paraxial diffraction of an ideal metal grating. Using the angular spectrum method with spatial-domain discrete sampling, we establish how the F-number and incident angle influence crosstalk intensity distribution. We analyze coherence effects and propose a cosine-based intensity response. Macroscopic experiments validate our microscopic model, revealing polarization parameter deviations and system noise, confirming crosstalk calibration feasibility.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"23008-23035"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294507","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}

{"title":"Defect levels in InAs/InAsSb type-II superlattice for LWIR cascade detectors.","authors":"K Majkowycz, K Murawski, M Kopytko, B Seredyński, P Martyniuk","doi":"10.1364/OE.562875","DOIUrl":"https://doi.org/10.1364/OE.562875","url":null,"abstract":"<p><p>This work presents DLTS (deep level transient spectroscopy) and PL (photoluminescence) results for a longwave infrared (LWIR) type-II InAs/InAsSb superlattice (T2SLs) based cascade detectors grown by a RIBER Compact 21-DZ solid source molecular beam epitaxy (MBE) system on GaAs substrate. The absorber was optimized for 10.6 μm at 300 K. In order to verify defects from individual heterostructure layers, DLTS measurements were performed for the entire cascade structure and a single cell (stage) of the cascade detector. The obtained results indicate that there are three defect levels (NDPs- native point defects) located in the absorber layer and one related to the occurrence of mismatch dislocations between buffer and substrate.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"22563-22569"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294508","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}

{"title":"Enhancing the measurement stability of segmented mirror edge height through synchronous measurement in atmospheric turbulence.","authors":"Bin Wang, Xiqun Wang, Junke Wang, Yichun Dai, Kunyan Wang, Xu Tan, Hui Yang, Dehua Yang, Changcheng Wu, Fangyu Xu, Zhenyu Jin","doi":"10.1364/OE.555887","DOIUrl":"https://doi.org/10.1364/OE.555887","url":null,"abstract":"<p><p>Optical interference phase measurement is a crucial technology for measuring the edge height of segments during the co-phased adjustment stage of giant astronomical telescopes equipped with segmented primary mirrors. For the Chinese Giant Solar Telescope (CGST), achieving optical interferometric measurements with a range of 10 <i>µ</i>m or more is a critical challenge that must be addressed to integrate the the co-focus and phasing adjustment processes. Given the unique requirements of solar observation, CGST intends to implement multi-wavelength technology to tackle the measurement range issue. However, this multi-wavelength measurement approach encounters the problem of edge jumps, and merely extending the exposure time does not effectively resolve this issue, which could compromise the telescope's diffraction-limited observational capabilities. The study indicates that the relative measurement error between two wavelengths, caused by atmospheric turbulence, is the primary factor leading to edge jumps. To address this issue, the paper proposes a dual-wavelength synchronous measurement technique. An experiment conducted on a segmented-mirror system demonstrates that, under turbulent conditions and with an exposure time of one second, the probability of edge jumps is negligible. By employing dual-wavelength synchronous technology, each measurement and adjustment takes only a few seconds, allowing the co-phased adjustment of CGST to be completed in just two to three rounds of measurement and adjustment.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"22699-22710"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294528","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}

{"title":"Experimental Kerr constant determination for pure blue phase liquid crystal: oblique incidence in a reflective vertical field switching cell.","authors":"Sumanyu Chauhan, Markus Wahle, Dieter Cuypers, Grigory Lazarev, Herbert De Smet","doi":"10.1364/OE.560601","DOIUrl":"https://doi.org/10.1364/OE.560601","url":null,"abstract":"<p><p>The use of blue phase liquid crystals (BPLCs) in spatial light modulators (SLMs) offer advantages over traditional nematic LCs due to their polarization-independent behavior. We demonstrate a simplified reflection-mode setup similar to liquid crystal on silicon (LCoS) technology to evaluate BPLC performance. Using a vertical field switching (VFS) reflective cell with pure BPLC, we achieve phase modulation without complex cell fabrication methods typically needed for BPLCs in VFS configurations. Our measurements validate the setup's effectiveness in characterizing BPLC electro-optic response. The measured Kerr constant of <i>K</i> ≈ 4.4 nm V^-2 demonstrates this approach's viability for developing BPLC-based SLMs.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"23260-23268"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294534","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}

{"title":"Hetero-core fiber optic pH sensor coated with Au nanoparticles immobilized in pH-sensitive polymer multilayers.","authors":"Deepro Banerjee, Kazuhiro Watanabe, Atsushi Seki, Michiko Nishiyama","doi":"10.1364/OE.559509","DOIUrl":"https://doi.org/10.1364/OE.559509","url":null,"abstract":"<p><p>In this paper, we have conducted a comparative study between hetero-core optical fiber localized surface plasmon resonance-based pH sensors that have been coated with a combination of different pH-sensitive polymers using the self-assembling layer-by-layer technique in the acidic pH range of 4.0-6.0. We have found that the pH response of the sensors in the given pH range increased with an increase in the number of self-assembled bilayers, and have concluded that the Poly-L-Lysine, Poly Acrylic Acid pair containing 30 layers had the highest optical loss change of 0.315 dB in response to pH change in the range of 4.0-5.5 at 650 nm wavelength out of all the other combinations.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"23645-23656"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294540","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}

{"title":"Independent tuning of free spectral range in thin-film lithium niobate microring resonators.","authors":"Jia-Lin Chen, Ji-Zhe Zhang, Guan-Zhong Huang, Peng Ye, Guo-Wei Zhang, Jia-Qi Wang, Yuan-Hao Yang, Xin-Biao Xu, Wen Liu, Zheng-Fu Han, Guang-Can Guo, Chang-Ling Zou, Wei Chen","doi":"10.1364/OE.562026","DOIUrl":"https://doi.org/10.1364/OE.562026","url":null,"abstract":"<p><p>In conventional traveling-wave optical cavities, the free spectral range (FSR) and the resonance frequencies are inherently linked, limiting the ability to control the FSR independently. This work presents a systematic investigation of techniques to tune the waveguide dispersion in thin-film lithium niobate (TFLN) microring resonators (MRRs), enabling independent control of the FSR without affecting a specific resonance. We experimentally characterize and compare the effects of electro-optic and thermo-optic tuning on the FSR and resonance wavelengths, revealing the difference in tuning waveguide mode dispersion between distinct mechanisms. Furthermore, we demonstrate that the FSR tuning behavior can be engineered by varying the waveguide width, offering an additional degree of freedom for dispersion control arising from the interplay between geometry and material dispersion. These findings provide new insights into the control of integrated photonic devices and can contribute to applications requiring independent control of FSR and resonance wavelengths.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"22852-22863"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294555","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}

{"title":"Plasmon-assisted channel-tunable bistable states in a monolayer MoS₂ nanoresonator coupled to a metallic nanoshell.","authors":"Jian-Bo Li, Hong-Mei Gong, Yu-Xiang Peng, Si Xiao, Jin-Bo Hu, Lin-Wen Long","doi":"10.1364/OE.564595","DOIUrl":"https://doi.org/10.1364/OE.564595","url":null,"abstract":"<p><p>We study how to obtain the channel-tunable bistable states in a coupled system consisting of a monolayer MoS₂ nanomechanical resonator (NR) and a metallic nanoshell (MNS) beyond the dipole approximation. The MNS is constructed by a metallic core and a dielectric shell. The calculated results show that the linear absorption spectrum exhibits some new features, such as three-phonon resonance, Rayleigh resonance, and ac-Stark resonance. In a strong exciton-plasmon coupling regime, the absorption peak and amplification peak in the absorption spectrum can be greatly enhanced by adjusting the exciton-phonon coupling strength. Especially, we plot the bistability phase diagrams in the system's parameter space and highlight the strong dependency of the lower (upper) bistable threshold on the pumping intensity, the MNS-NR distance, and the dielectric shell thickness. The ratio of linear absorption in the upper and lower stable states can reach 42. For a given MNS with a fixed shell thickness, it is easy to achieve single-channel or dual-channel bistable states by only adjusting the exciton-phonon coupling strength via modulation of the length of the MoS₂ nanosheet along the NR axis. The findings obtained here are very useful for extensive applications such as optical memory cells and channel-tunable bistable switches.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"23568-23578"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294560","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}

{"title":"Microwave photonics channelized receiver with high phase stability.","authors":"Guchang Chen, Chenyuan Li, Xiangzhi Xie, Feifei Yin, Kun Xu, Yitang Dai","doi":"10.1364/OE.560351","DOIUrl":"https://doi.org/10.1364/OE.560351","url":null,"abstract":"<p><p>Acquiring phase relationships among channels is crucial for channelized receivers to achieve large instantaneous bandwidth. In conventional technical approaches, the system exhibits significant sensitivity to environmental disturbances and fails to maintain stable phase relationships across channels, resulting in significant challenges in acquiring cross-channel phase information. Consequently, extensive additional digital signal processing is necessitated to extract the phase information of broadband signals. To mitigate these limitations, this study proposes a novel microwave photonics (MWP) channelized receiver with high phase stability based on dual optical frequency combs (OFCs). The system is meticulously designed to ensure the same phase jitter across all channels at the hardware level, thereby preserving stable phase relationships among channels. This architectural innovation significantly enhances the system's immunity to environmental disturbances. In the experimental evaluation, dual-tone signals were employed to assess the phase stability among channels within the system. The root mean square values of phase jitter among all the channels were within 1.71 degrees. Additionally, comprehensive system testing was conducted using broadband linear frequency modulation (LFM) signals and broadband quadrature phase shift keying (QPSK) signals. The received signals were successfully reconstructed. Through repeated measurements, it was demonstrated that the demodulated LFM signals exhibited stable side mode suppression ratios, while the QPSK signals yielded stable constellation diagrams post-demodulation. These experimental results conclusively validate the phase stability of the proposed system. Notably, this system represents the hardware-level implementation of a channelized receiver capable of maintaining stable phase relationships among channels based on dual OFCs. Furthermore, it has experimentally demonstrated, for the first time, the channelized reception and synthesis of a single broadband digital signal. This advancement provides a potential solution for phase-stabilized channelized reception of broadband signals, offering a robust solution for applications requiring high phase stability and large instantaneous bandwidth.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 11","pages":"23668-23677"},"PeriodicalIF":3.2,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144294570","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}