Optics letters最新文献

Compact and low-loss inline optical power monitor with an MMI-based Ge/Si hybrid waveguide. 紧凑和低损耗在线光功率监视器与基于mmi的Ge/Si混合波导。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.559532

Xinxuan Ma, Yuhang Wan, Zheng Zheng

引用次数: 0

Dyakonov surface waveguide modes in ring resonators. 环形谐振器中的Dyakonov表面波导模式。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.563679

I I Stepanov, O V Borovkova, N A Gippius, S A Dyakov, D A Chermoshentsev

引用次数: 0

Frequency super-resolution time-frequency analysis method in the optical downconversion E-field measurement system. 光学下变频电场测量系统中的频率超分辨时频分析方法。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.562133

Qingwen Zhang, Yan Yang, Xinyu Zhang, Shuguo Xie

{"title":"Frequency super-resolution time-frequency analysis method in the optical downconversion E-field measurement system.","authors":"Qingwen Zhang, Yan Yang, Xinyu Zhang, Shuguo Xie","doi":"10.1364/OL.562133","DOIUrl":"https://doi.org/10.1364/OL.562133","url":null,"abstract":"Because of the challenges of an electromagnetic space with vast information, rapid dynamics, and wide bandwidth, the optical downconversion E-field measurement system can be used for reducing measurement time and enhancing signal reception by downconverting signals to a narrowband. However, the narrowband compression often causes spectral aliasing, hindering the effective extraction of parameters as traditional separation methods fail to work with aliased signals. In order to address the above issues, we propose a frequency super-resolution time-frequency analysis method (FSR-TFAM) for downconversion of aliased signals based on eigenvalue decomposition. On the one hand, dense signals in the frequency domain are expanded with time to realize the sparsity of the dense spectra and retain the signal parameters to the greatest extent. On the other hand, the method of separating signals from the noise subspace according to their eigenvalues is adopted to solve the problem of time-frequency contradiction in the traditional time-frequency analysis. Also, under the condition of limited sampling length, this method can read the frequency information of the downconversion signal with high precision, which greatly improves the measurement accuracy of the system. In single-tone signal simulations, the proposed method could reduce the mean frequency error by 98.08% compared to short-time Fourier transform (STFT).","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4198-4201"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541711","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

One-stage hollow-core fiber-based compression of Yb:KGW lasers to the single-cycle regime. Yb:KGW激光器单周期压缩的单级空心芯光纤。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565432

Z Pi, A B Enders, D Vaso, E Goulielmakis

引用次数: 0

Single-pixel imaging system based on a high performance S-CYHEAPbI₃ self-powered detector. 基于高性能S-CYHEAPbI3自供电探测器的单像素成像系统。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.566338

Xiaoting Wang, Cuili Cui, Long Yuan, Zhihui Kang, Jiahao Bai, Jiajia Ning, Ling Zuo, Hanzhuang Zhang, Yinghui Wang

{"title":"Single-pixel imaging system based on a high performance S-CYHEAPbI3 self-powered detector.","authors":"Xiaoting Wang, Cuili Cui, Long Yuan, Zhihui Kang, Jiahao Bai, Jiajia Ning, Ling Zuo, Hanzhuang Zhang, Yinghui Wang","doi":"10.1364/OL.566338","DOIUrl":"https://doi.org/10.1364/OL.566338","url":null,"abstract":"We carry out a route to fabricate the ferroelectric S-CYHEAPbI3 polycrystalline films for photodetectors (PDs), with ITO/S-CYHEAPbI3/Ag structure. The PD exhibits a good optoelectronic performance including an on-off ratio of 1.87 × 104, a responsivity (R) of 14.3 A W-1, and a detectivity of 5.42 × 1012 Jones at a bias voltage of 0.3 V and the self-powered optoelectronic properties involving a R of 0.42 A W-1 and a detectivity of 1.15 × 1012 Jones. The frequency-modulation test and the transient absorption test together point out that the photo-generated carriers have to spend ∼0.02 eV to freely move in the S-CYHEAPbI3 polycrystalline films, owing to the barrier of crystal domains. A single-pixel imaging system based on our PD can continuously obtain pattern information in power-free environments due to its self-powered capability and high photostability. These results open a new avenue for fabricating high-performance PD and broaden its application in optoelectronic devices.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4186-4189"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541753","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

Synchronized multi-wavelength picosecond pulse generation by a single-frequency laser seeded Raman fiber amplifier. 单频激光种子拉曼光纤放大器同步多波长皮秒脉冲的产生。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.566572

Zhi Cheng, Jiaqi Zhou, Ting Yu, Yunmeng Liu, Xinru Cao, Yatan Xiong, Yingjuan Shi, Yan Feng

{"title":"Synchronized multi-wavelength picosecond pulse generation by a single-frequency laser seeded Raman fiber amplifier.","authors":"Zhi Cheng, Jiaqi Zhou, Ting Yu, Yunmeng Liu, Xinru Cao, Yatan Xiong, Yingjuan Shi, Yan Feng","doi":"10.1364/OL.566572","DOIUrl":"https://doi.org/10.1364/OL.566572","url":null,"abstract":"Synchronized multi-wavelength ultrafast laser has been widely used in Raman scattering spectroscopy, ultrafast pump-probe microscopy, coherent optical synthesis, and difference-frequency generation. Here, we demonstrate a cascaded single-frequency continuous wave (SF-CW) laser seeded Raman fiber amplifier to generate synchronized multi-wavelength picosecond pulses centered at 1065 nm, 1121 nm, and 1178 nm with ∼10 ps pulse duration. Different from the previous reported methods with resonator configuration, the SF-CW seeded Raman fiber amplifier not only is free of elaborate cavity length alignment but also presents repetition rate agility. Utilizing a gain switched diode as the pump source, the repetition rate of the synchronized multi-wavelength pulses could be adjusted from 20 MHz to 50 MHz. Additionally, the influence of the amplified spontaneous Raman emission (ASRE) has been investigated experimentally. It was found that suppressing the accumulated ASRE from the preceding amplifier stage is the key to obtain high-order Stokes pulses with decent spectral coherence.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4358-4361"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541760","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

All-fiber Er:ZBLAN ring cavity laser in the 2.8 μm band. 2.8 μm波段全光纤Er:ZBLAN环形腔激光器。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565610

Nasrollah Karampour, Gebrehiwot Tesfay Zeweldi, Md Moinul Islam Khan, Martin Rochette

引用次数: 0

Enhancement of the electro-optic modulation efficiency in lithium niobate whispering gallery mode microdisk modulators. 铌酸锂窃窃廊模式微盘调制器电光调制效率的提高。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.561638

Farah Comis, James Seddon, Mu-Chieh Lo, Alfonso Ruocco

引用次数: 0

Generation and coherent control of dark-state spatial modes. 暗态空间模式的产生与相干控制。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.562083

Huai-Che Shia, Siang-Wei Shao, Wu-Cheng Chiang, Yu-Hung Kuan, I-Kang Liu, Teodora Kirova, Gediminas Juzeliūnas, Yu-Ju Lin, Wen-Te Liao

引用次数: 0

hyperPICASSO: adapting the mutual-information-based unmixing technique PICASSO to hyperspectral datasets. hyperPICASSO：将基于互信息的解混技术应用于高光谱数据集。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564010

Chi Z Huang, Vincent D Ching-Roa, Michael G Giacomelli

{"title":"hyperPICASSO: adapting the mutual-information-based unmixing technique PICASSO to hyperspectral datasets.","authors":"Chi Z Huang, Vincent D Ching-Roa, Michael G Giacomelli","doi":"10.1364/OL.564010","DOIUrl":"https://doi.org/10.1364/OL.564010","url":null,"abstract":"Mutual-information (MI)-based unmixing algorithms such as PICASSO (Process of ultra-multiplexed Imaging of biomoleCules viA the unmixing of the Signals of Spectrally Overlapping fluorophores), which iteratively subtract pairs of images to minimize MI, have demonstrated the ability to remove spectral overlap from highly multiplexed fluorescent probes better than reference-based unmixing due to the binding-site variation of fluorophore emission spectra. However, when dealing with hyperspectral datasets, these approaches rely on naïve binning across discrete spectral bands. In doing so, spectral information within those bands is disregarded, resulting in inefficient unmixing. To address this, we have developed the hyperPICASSO algorithm, which generalizes MI-based unmixing to hyperspectral datasets. Our approach is to extract spectral features from annotated images that are used to perform approximate linear unmixing, which is then iteratively improved by pairwise minimization of MI. We find that hyperPICASSO significantly reduces cross talk compared to applying PICASSO-based unmixing to naïve binning of spectral data and compared to linear unmixing using measured spectra. The advantage is particularly evident for features with strongly overlapping emission spectra. We demonstrate that MI-based unmixing can greatly reduce cross talk by utilizing hyperspectral data.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4386-4389"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541718","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