Optical Engineering最新文献_第7页

Research on the fabrication of high-power semiconductor lasers by impurity-free vacancy disordering 无杂质空位无序制备大功率半导体激光器的研究

4区工程技术

Optical Engineering Pub Date : 2023-11-07 DOI: 10.1117/1.oe.62.11.116102

Tianjiang He, Qiong Qi, Nan Lin, Wei Li, Xiaoyu Ma, Suping Liu

{"title":"Research on the fabrication of high-power semiconductor lasers by impurity-free vacancy disordering","authors":"Tianjiang He, Qiong Qi, Nan Lin, Wei Li, Xiaoyu Ma, Suping Liu","doi":"10.1117/1.oe.62.11.116102","DOIUrl":"https://doi.org/10.1117/1.oe.62.11.116102","url":null,"abstract":"The preparation of a non-absorption window (NAW) through impurity-free vacancy disordering (IFVD) induced quantum well intermixing (QWI) in 915 nm GaInAsP/GaAsP semiconductor lasers is aimed at enhancing the catastrophic optical mirror damage (COMD) threshold and output power of semiconductor lasers. A process for the fabrication of high-power semiconductor lasers has been explored through the intermixing study of primary epitaxial wafers. In the experimental procedure, the epitaxial layers at the front and rear facets were first selectively etched, followed by the deposition of a 200 nm SiO2 dielectric layer on their surfaces. Additionally, a 100 nm TiO2 dielectric layer is applied to suppress QWI in the gain emission region. A NAW is achieved through a rapid thermal annealing process at 830°C for 180 s under atmospheric pressure. In the wafer-scale fabrication process, wide-stripe single-tube devices are produced with a light-emitting region width of 200 μm and a cavity length of 4000 μm. Test results reveal that conventional single-tube devices typically experience COMD at an input current of ∼20 A, with power output at around 19 W. In contrast, the single-tube devices with the NAW reach a continuous output power of 27.7 W at an input current of 30 A, representing a power enhancement of ∼45.8 % . No optical catastrophic damage is observed, and characteristics, such as slope efficiency and threshold current, remain unaltered. This research demonstrates that IFVD combined with the wafer-scale fabrication can effectively enhance the COMD threshold of 915 nm GaInAsP/GaAsP semiconductor laser devices, offering valuable insights into the study of high-power semiconductor lasers.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"9 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135480121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure simulation and design optimization of high-performance lithium niobate thin film electro-optic modulator 高性能铌酸锂薄膜电光调制器的结构模拟与设计优化

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.115103

Hao Chen, Wenyuan Liao, Shaohua Yang, Huafeng Dong, Ying Shi, Huangfan Wang, Fugen Wu

引用次数: 0

Adaptive received signal strength-based localization and channel state information estimation model for indoor multiple-input multiple-output visible light communication using the distance vector (Erratum) 利用距离矢量为室内多输入多输出可见光通信建立基于接收信号强度的自适应定位和信道状态信息估计模型（勘误表）

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.oe.62.11.119801

Tran The Son, Vuong Cong Dat, H. Le‐Minh, Zabih Ghassemlooy, Duong Huu Ai, Huynh Cong Phap

引用次数: 0

Classification of material and surface roughness using polarimetric multispectral LiDAR 利用偏振多光谱激光雷达对材料和表面粗糙度进行分类

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.114104

Yu Han, D. Salido-Monzú, A. Wieser

{"title":"Classification of material and surface roughness using polarimetric multispectral LiDAR","authors":"Yu Han, D. Salido-Monzú, A. Wieser","doi":"10.1117/1.OE.62.11.114104","DOIUrl":"https://doi.org/10.1117/1.OE.62.11.114104","url":null,"abstract":"Abstract. Multispectral light detection and ranging (LiDAR) is an emerging active remote sensing technique that combines distance and spectroscopy measurements. The reflectance spectrum is known to enable material classification. However, the spectrum also depends on other surface parameters, particularly roughness. Herein, we propose an extension of multispectral to polarimetric multispectral LiDAR and introduce unpolarized and linearly polarized reflectance spectra as additional features for classifying materials and roughness. Using a bench-top prototype instrument, we demonstrate the feasibility and benefit of acquiring unpolarized and linearly polarized reflectance spectra. We analyze and interpret the spectra obtained with two different spectral resolutions (10 and 40 nm) from measurements on test specimens consisting of five different materials with two different levels of surface roughness. Using a linear support vector machine, we demonstrate the potential of the different features for enabling material and roughness classification. We find that the unpolarized reflectance spectrum is well suited for classifying materials, and the linearly polarized one for classifying roughness. In both cases, the performance is much better than using a standard reflectance spectrum offered by multispectral LiDAR. We identify polarimetric multispectral LiDAR as a technology that may significantly enhance surface and material probing capabilities for remote sensing applications.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"13 1","pages":"114104 - 114104"},"PeriodicalIF":1.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139304665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of passivation coating on the HgCdTe heterostructures stability at elevated storage temperature 钝化涂层对 HgCdTe 异质结构在高储存温度下稳定性的影响

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.117103

Andrew R. Novoselov, Dmitriy Protasov, V. Kostyuchenko

{"title":"Effect of passivation coating on the HgCdTe heterostructures stability at elevated storage temperature","authors":"Andrew R. Novoselov, Dmitriy Protasov, V. Kostyuchenko","doi":"10.1117/1.OE.62.11.117103","DOIUrl":"https://doi.org/10.1117/1.OE.62.11.117103","url":null,"abstract":"Abstract. It was shown that the concentration of charge carriers and the stoichiometry of near-surface region are changed in p-type HgCdTe films with non-passivated and soiled by indium surface under storage temperatures 80°C and 120°C. The concentration of holes increased up to 1024 cm − 3 and mobility dropped up to 12 cm2 / ( V × s ) under heating. From acquired Auger spectra, it was obtained that the mercury concentration decreased but the cadmium concentration increased in near-surface region as the indium spot approached. The surface passivation by photoresist prevented these degradation processes. The current–voltage characteristics of p-n junctions around the indium spots on the surface of p-type HgCdTe films passivated by SiO2 / Si3N4 layers were measured after storage temperatures from 60°C up to 120° C. It was found that the p-n junctions closest to the indium spots have an increased dark current. The usage of an additional passivation layer of anodic oxide suppressed the appearance of regions with increased dark currents. It was concluded that the additional passivation layer of anodic oxide is necessary for durable and stable work of infrared detector arrays based on HgCdTe films.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"1 1","pages":"117103 - 117103"},"PeriodicalIF":1.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139301232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tool-free axis calibration method for self-rotating three-dimensional vision systems 自旋转三维视觉系统的免工具轴校准方法

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.114105

Jinyue Liu, Xinyuan Cao, Xiaohui Jia, Yiran Ma, Guanghao Li, Tiejun Li

{"title":"Tool-free axis calibration method for self-rotating three-dimensional vision systems","authors":"Jinyue Liu, Xinyuan Cao, Xiaohui Jia, Yiran Ma, Guanghao Li, Tiejun Li","doi":"10.1117/1.OE.62.11.114105","DOIUrl":"https://doi.org/10.1117/1.OE.62.11.114105","url":null,"abstract":"Abstract. The self-rotating three-dimensional (3D) visual scanning system is a prevalent technique for 3D reconstruction. However, the misalignment of the scanner’s rotation axis with the camera’s origin often necessitates specialized calibration tools to establish their relative positions. We propose a rotating axis calibration method for the rotation axis, which eliminates the need for specific tools. A rotating mechanism is used to rotate the 3D camera to different angles and carry out 3D reconstruction of the same object with curved surface characteristics, respectively. The resulting sequence of 3D point clouds is registered to derive the camera’s position transformation matrix corresponding to each rotation angle. Subsequently, we compute the positional relationship between the camera and the rotation axis by solving the equation. To prevent excessively large rotation angles that would cause the object beyond the camera’s field of view, the camera field extension method is proposed, which enhances equation redundancy and leads to improved calibration accuracy. Experiments prove the flexibility and accuracy of the proposed method.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"65 1","pages":"114105 - 114105"},"PeriodicalIF":1.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139305172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep network for underwater image enhancement inspired by physical imaging model 受物理成像模型启发的水下图像增强深度网络

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.113108

Guijin Tang, Yukang Song, Feng Liu

{"title":"Deep network for underwater image enhancement inspired by physical imaging model","authors":"Guijin Tang, Yukang Song, Feng Liu","doi":"10.1117/1.OE.62.11.113108","DOIUrl":"https://doi.org/10.1117/1.OE.62.11.113108","url":null,"abstract":"Abstract. Underwater images often suffer from problems such as low contrast, color distortion, and blurred details, which have a negative impact on subsequent image processing tasks. To mitigate such problems, we propose an algorithm that combines an underwater physical imaging model with a convolutional neural network. The physical imaging model has two important types of parameters: background scattering parameters and direct transmission parameters. For the background scattering parameters, we divide them into three levels, which are primary information, secondary information, and advanced information, and design three subnetworks for feature extraction to represent them. For the direct transmission parameters, we decompose them into two levels, which are shallow transmission information and deep transmission information, and also design two subnetworks to indicate them. Experimental results show that, compared with other enhancement algorithms, the proposed algorithm can not only effectively correct the color deviation and enhance the object edges and texture details but also can obtain superior values of objective evaluation metrics in terms of peak signal-to-noise ratio, structural similarity, underwater color image quality evaluation, and underwater image quality measure.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"105 1","pages":"113108 - 113108"},"PeriodicalIF":1.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139306099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical performance of commercial liquid lens assemblies in microgravity 商用液体透镜组件在微重力环境下的光学性能

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.113106

Shreeyam Kacker, Kerri L. Cahoy

{"title":"Optical performance of commercial liquid lens assemblies in microgravity","authors":"Shreeyam Kacker, Kerri L. Cahoy","doi":"10.1117/1.OE.62.11.113106","DOIUrl":"https://doi.org/10.1117/1.OE.62.11.113106","url":null,"abstract":"Abstract. Focus-tunable liquid lenses are used in various applications due to their compact size, light weight, low power consumption, and cost effectiveness. They have the potential for use in space applications, such as focus compensation, optical communications, and imaging systems. However, liquid lenses have not yet been evaluated for use in the space environment. This work focuses on characterizing operational differences of commercially available liquid lenses from Corning Varioptic and Optotune between Earth gravity, microgravity, and hypergravity environments. Results show a linear drift in the tip/tilt of 0.80 and 4.20 mrad going from 1 to 0 g for the Corning Varioptic A-39N0 lens and Optotune EL-16-40-TC-VIS lens, respectively, with lower optical aberrations in microgravity. Additionally, a significant but small increase in focal power going from 1 to 0 g by 0.02 D is observed for the Optotune lens. No significant change in focal power is observed for the Corning Varioptic lens tested in this experiment. Additionally, potential multi-beam interference is observed in defocus patterns of the Corning Varioptic lens tested during the experiment.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"9 1","pages":"113106 - 113106"},"PeriodicalIF":1.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139297211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retrieval of phase and three-dimensional topography using modified transport of intensity and phase equations with electrically programmable optical path lengths 利用带电可编程光路长度的改良强度和相位传输方程检索相位和三维地形图

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.113102

Nouf Alanazi, Partha P. Banerjee

{"title":"Retrieval of phase and three-dimensional topography using modified transport of intensity and phase equations with electrically programmable optical path lengths","authors":"Nouf Alanazi, Partha P. Banerjee","doi":"10.1117/1.OE.62.11.113102","DOIUrl":"https://doi.org/10.1117/1.OE.62.11.113102","url":null,"abstract":"Abstract. Transport of intensity (TI) is a well-known non-interferometric technique for phase retrieval. The TI and phase equations result from the Helmholtz equation and show the coupling of intensity and phase during optical propagation. TI is an alternative to digital holography, which requires a reference beam for a recording of the interference pattern. However, the conventional TI method has an experimental challenge in that mechanical displacement of the camera or object is needed to record the optical intensities at multiple defocused planes, which can cause errors from misalignments. This work expands on a modified TI technique that avoids mechanical displacements, instead invoking the use of electrooptic materials to create an optical phase difference and hence optical path length through the application of a bias voltage. We demonstrate the use of the modified TI equation (TIE) through simulation and experiment by selecting suitable objects and a biased nematic liquid crystal cell made from pentyl-4-cyanobiphenyl (5CB). The corresponding modified transport of phase equation is also derived and is used to enhance the accuracy of the modified TIE. After providing simulation results for imaged phase retrieval, we demonstrate the unwrapped image phase and hence height or profile extraction for an object with three-dimensional topography using this technique.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"21 1","pages":"113102 - 113102"},"PeriodicalIF":1.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139302153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of wavelength accuracy of reconstruction-equivalent-chirp laser arrays on performance of wavelength division multiplexing space laser communication system 重构等效啁啾激光阵列的波长精度对波分复用空间激光通信系统性能的影响

IF 1.3 4区工程技术

Optical Engineering Pub Date : 2023-11-01 DOI: 10.1117/1.OE.62.11.118103

Mi Li, Anni Li, Chuanbo Zhang, Jiaqiang Nie, Yue-chun Shi, Yuejiang Song, Xiangfei Chen

{"title":"Effect of wavelength accuracy of reconstruction-equivalent-chirp laser arrays on performance of wavelength division multiplexing space laser communication system","authors":"Mi Li, Anni Li, Chuanbo Zhang, Jiaqiang Nie, Yue-chun Shi, Yuejiang Song, Xiangfei Chen","doi":"10.1117/1.OE.62.11.118103","DOIUrl":"https://doi.org/10.1117/1.OE.62.11.118103","url":null,"abstract":"Abstract. To evaluate the effect of crosstalk caused by wavelength deviation of reconstruction-equivalent-chirp (REC) integrated multi-wavelength laser arrays (MWLAs) on an optical free-space communication system in which wavelength division multiplexing (WDM) is applied, we derive the model of power penalty caused by the wavelength deviation of REC-MWLAs and the bit error rate (BER) of the system under atmospheric turbulence and conduct a numerical simulation. The two adjacent channels in arranged REC laser arrays are defined as the analysis scope. We find that the power penalty is more sensitive to the deviation of the channel itself than the adjacent channel as the frequency shift increases from 0 to 50 GHz. The numerical relationship between the BER and power penalty is drawn to further investigate the tolerance for wavelength deviation under the requirements of BER < 10 − 6 and BER < 10 − 9. In addition, for a smaller deviation of 5 GHz of the analyzed channel, the linewidth compression of the REC laser can decrease the power penalty from 1.3 to 0.7 dB, improving the system performance and moderating the demands for deviation of REC-MWLAs, and the gemination of channel spacing does not evidently reduce the requirement for deviation. The results of this work demonstrate the feasibility of REC-MWLAs as the light source of WDM free-space communication systems under atmospheric turbulence and provide an effective reference for the allowable deviation in the design and testing of MWLAs.","PeriodicalId":19561,"journal":{"name":"Optical Engineering","volume":"24 1","pages":"118103 - 118103"},"PeriodicalIF":1.3,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139303441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0