共查询到19条相似文献,搜索用时 93 毫秒
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集成冷光学的红外探测器杜瓦封装在中波、长波红外组件研制中具有重要意义,有利于抑制红外辐射背景、提升仪器灵敏度和集成度。提出了集成冷光学的中波、长波双波段探测器杜瓦组件,设计了一体化冷平台支撑、低漏热透镜支撑等新结构,解决了冷光学透镜组与探测器组合、双波段探测器透镜组之间高精度配准及高强度单点支撑钎焊等新工艺,建立了该冷光学集成组件杜瓦的冷面温度均匀性、双温区控制以及低热负载等关键参数。实现了杜瓦液氮热负载小于0.85 W,中波工作于73 K,冷面温度均匀性0.36 K,长波工作于65 K,冷面温度均匀性0.08 K,探测器与透镜组配准精度偏差优于±10μm,探测器光学模组间配准偏差优于±15μm。该新型杜瓦已通过一系列空间环境适应性试验验证,成功应用于风云四号系列气象卫星大气垂直探测仪中。 相似文献
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扫积型红外探测器是目前大量使用的一种新型红外探测器,在研制这种红外探测器时,应对这种探测器/杜瓦瓶的热耗(漏热)进行计算,以便对制冷器的制冷功率等参数提出合理的要求。本文从一般传热学原理出发,对该探测器/杜瓦瓶所发生的辐射、传导、焦耳热等漏热进行了计算,从而得到了该探测器/杜瓦瓶所消耗的热量——热耗,并与国内外有关资料、数据进行了比较。 相似文献
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红外探测器封装微型杜瓦瓶结构与分析 总被引:1,自引:0,他引:1
本文分析了用于多元红外探测器封装的微型杜瓦瓶的三种结构形式,并分析了其漏热,电学性能和工艺性,通过比较对今后我国红外探测器封装技术作出预测。 相似文献
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介绍了脉冲YAG激光焊接红外探测器全金属杜瓦瓶的工艺参数及焊接结构的选择,并对焊结结果进行了检测分析。 相似文献
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为了满足低温光学系统低背景、低功耗和红外探测器制冷组件高环境适应性的要求,提出了探测器制冷组件杜瓦主体(窗口、窗口帽和引线盘) 200 K低温保持,与制冷机膨胀机或脉管散热面柔性绝热连接的设计思想。针对低温光学用杜瓦柔性外壳工程应用中的特点,文中以某低温光学用长波12.5 μm 2 000元红外探测器杜瓦组件以例,提出了波纹管作为绝热连接的柔性外壳,重点阐述杜瓦柔性波纹管隔热、力学和相关漏热的设计,并开展不同热负载条件下波纹管热特性验证,可实现最小温度梯度为37.22 K,绝热热阻为1142 K/W,误差在37%。为综合评价低温光学用柔性外壳结构杜瓦组件的性能,对某低温光学用长波12.5 μm 2 000元探测器柔性外壳杜瓦组件开展热真空和鉴定级的力学试验考核验证,试验结果表明实现了200 K低温窗口,探测器60 K工作,杜瓦漏热为544 mW,低温工况工作时相对于常温工况制冷机的功耗下降了53%,并通过了4 g的随机力学考核,验证了低温光学用杜瓦柔性波纹管外壳模型合理可行,对于后续低温光学用杜瓦柔性外壳结构工程应用提供了重要参考。 相似文献
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Attenuation and phase constants are calculated for a metal-clad-dielectric-slab waveguide and the results show the behavior of the propagating modes as a function of cladding material and dielectric. Analysis indicates that the dielectric properties influence the attenuation and cutoff frequencies whereas the metal cladding influences primarily the attenuation of propagating modes. Variation of the attenuation and phase constant around a center frequency show surface-wave properties of the TM0 and TM1 modes. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1987,75(11):1512-1523
Integrated optics and optoelectronics will play key roles in the evolution of the telecommunications network. We briefly review the available and developing technologies for integrated optical and optoelectronic devices, and summarize their characteristics and their natural areas of application in telecommunications. We then describe the trends and developments in fiber communication systems, services, and architectures, and how they can benefit from these devices. Major areas in which these devices are expected to contribute are: lowering the costs of high-speed network termination equipment to aid in providing inexpensive wide-band services to the subscriber; increasing the fraction of the fiber's natural bandwidth that can be made available for network usage; and increasing the network flexibility to facilitate multiservice integration. 相似文献
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Tung-Lin Tsai Hang-Sheng Tuan 《Quantum Electronics, IEEE Journal of》1974,10(3):326-332
The reflection and scattering properties of guided optical waves at a single groove discontinuity are studied in this paper. The groove is on the surface of an optical thin-film waveguide commonly used in integrated optics. Both the fundamental TE0 and TM0 modes are considered. The problem is treated by a boundary perturbation technique. The power reflection coefficient, the radiation patterns, and the power of waves scattered into the free space and the substrate are found. Numerical results from an example are given to illustrate the effect of the geometric shape of the groove. 相似文献
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A numerical method is described that provides the means for optimizing any objective function representing a general multilayer integrated optics waveguide. In this way, the physical parameters of the multilayer structure can be set so that the performance of the device is optimized. The method uses any standard numerical minimization algorithm in conjunction with the argument principle method. The method has been successfully applied for the optimization of a multilayer immunosensor and a TE-mode polarizer. The advantages of the method are its generality, its efficiency, its accuracy, and its applicability to a wide range of planar integrated optics devices 相似文献
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Colucci G. Romano D. Bava G.P. Montrosset I. 《Quantum Electronics, IEEE Journal of》1992,28(3):729-738
An almost analytical model for the analysis of integrated optics parametric oscillators is proposed. A comprehensive discussion of the static device characteristics of a doubly resonant oscillator with varying parameters of the optical cavity which influence the operation conditions (single and double pass and resonant pump) is presented. A detailed discussion of the evolution towards the singly resonant condition and the possibility of hysteretic behavior is also included 相似文献
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针对超长线列红外探测器杜瓦具有容积大、零部件种类多、材料放气源多,特别是集成式超长线列杜瓦与内充3 MPa高压氦气的直线脉管冷指封装集成等特点,基于材料解析放气及渗透理论,建立了超长线列杜瓦组件真空寿命评估模型,对分置式与集成式超长线列杜瓦的真空寿命进行了计算,其真空寿命预计值均可以达到2年。设计了一种杜瓦真空度在线监测结构对这两类杜瓦的真空度进行了实时监测,分置式及集成式杜瓦真空寿命预计值与实测值相对误差分别为5.8%和6.96%。因集成式杜瓦真空寿命估算较为困难,对其热负载通过制冷性能进行实验验证,其热负载2年后未发生明显变化。 相似文献
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Roughness, inhomogeneity, and integrated optics 总被引:1,自引:0,他引:1
Surface roughness (and more generally) inhomogeneity is a constraining factor on optoelectronics devices. Its more conspicuous effect is to scatter light thus leading to power attenuation. This effect partly explains the five orders of magnitude difference in attenuation between fibers and integrated waveguides. Less well known is the effect of roughness on back-coupling and mode coupling in devices such as couplers and gratings. I present here an overview of these effect analyzed from a heuristic approach based upon the length scales of the dominant physical mechanism present in such devices 相似文献