共查询到18条相似文献,搜索用时 831 毫秒
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新型长波长InP基谐振腔增强型光探测器 总被引:4,自引:1,他引:3
介绍了一种新型长波长InP基谐振腔增强型(RCE)光探测器。通过V(FeCl3):V(H2O)溶液对InGaAs牺牲层的选择性湿法腐蚀,制备出具有InP/空气隙的高反射率分布布拉格反射镜(DBR),并将该选择性湿法腐蚀技术成功地应用到长波长InP基谐振腔增强型光探测器的制备中去,从而彻底解决了InP/InGaAsP高反射率分布布拉格反射镜难以外延生长的问题。所制备出的谐振腔增强型光探测器,其台面面积为50μm×50μm,底部反射镜为1.5对的InP/空气隙分布布拉格反射镜,顶部反射镜靠InGaAsP与空气的界面反射来实现。测试结果表明,该谐振腔增强型光探测器在波长1.510μm处获得了约59%的峰值量子效率,在3V反偏压下暗电流为2nA,3dB响应带宽达到8GHz。 相似文献
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谐振腔增强型光探测器的高速响应性能研究 总被引:2,自引:2,他引:0
高速长波长光探测器是高速光纤通信系统和网络的关键器件,它要求光探测器具有宽的频率响应带宽和高量子效率。常用的PIN光探测器由于量子效率和高速性能均受到吸收层厚度的牵制,使得二者相互制约,成为一对矛盾。谐振腔增强型(RCE)光探测器为这一矛盾的解决提供了有效的方案。基于谐振腔增强型光探测器的实际设计和制作模型,分析了器件吸收层中的光场分布,并将其运用于载流子的连续方程,从理论上详细地分析了器件的高速响应特性,给出了计算结果。针对研制的高速长波长谐振腔增强型光探测器,进行了理论分析和实际器件测试的结果比较,得到了比较一致的结果。 相似文献
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本文提出了一种新型的3腔结构谐振腔增强型光探测器,并进行了实验研究。此器件的光谱响应线宽由其滤波腔决定。实验测得为小于4nm;它的量子效率由其吸收腔决,器件的整体响应可以在一定程度上补偿其波腔的损耗。 相似文献
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长波长、高灵敏度的InP/InGaAs谐振腔光电探测器 总被引:2,自引:0,他引:2
本文报道了一种能够实现高速、高灵敏度的InP基谐振腔增强型(RCE)光电探测器。它采用衬底入光方式,解决了在InP衬底上外延生长的InP/InGaAs介质膜分布布拉格反射镜(DBR)反射率低的问题,该探测器的吸收层厚度为0.2μm,在波长1.583μm处获得了80%的峰值量子效率,同时为了降低探测器的固有电容,利用质子注入技术使得器件的部分电极绝缘,实验结果表明质子注入不影响RCE光电探测器的量子效率。 相似文献
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简要评论了响应1~2μm光谱区的探测器结构.介绍液相外延生长的InGaAs光电探测器结果,其中包括适用于1.0~1.7μm光谱区的直径为100μm和500μm的器件以及适用于0.5~1.7μm波段直径为100μm的薄帽器件.在这些器件中观察到高量子效率、低漏电电流和高稳定性.本文还描述了响应2~3μm波长的异质结构器件. 相似文献
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报导Ku波段高功率GaAsFET的制造技术,包括全离子注入、0.5μm自对准栅、高可靠欧姆接触、干法生长和刻蚀、背面通孔、内匹配和合成技术。器件由两个9.6mm栅宽的芯片组成,在11.2~11.7GHz频带内,一分口增益压缩输出功率8W,增益6dB,功率附加效率24%。 相似文献
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A novel resonant cavity enhanced (RCE) photodetector with flat-top and steep-edge response is presented. The response is obtained
by designing a gradient-thickness P area in the absorption cavity. Simulation results show that the maximum and minimum values
of the quantum efficiency in bandpass are 85.242% and 87.564% respectively, the ripple is about 3.6%, and 0.5 dB, 3 dB and
20 dB bandwidths are 0.3 nm, 0.4 nm and 1.2 nm, respectively. The mesa area is 10 μm × 10 μm and the frequency response bandwidth
is 87 GHz. Compared with similar photodetectors, this photodetector has high quantum efficiency, narrow spectral response
linewidth, good flat-top and steep-edge response and ideal high-speed characteristics. 相似文献
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高速电光调制器是宽带光通信网络和微波光子系统中的关键元器件之一。相对于体材料铌酸锂而言,薄膜铌酸锂材料由于其较强的光场限制能力,在构建小尺寸、宽带、低半波电压的高性能电光调制芯片上有独特的优势。文章基于薄膜铌酸锂材料研制了一种3 dB带宽不低于50 GHz的电光调制芯片,并采用光纤与波导水平端面耦合的光学封装方案和基于1.85 mm同轴接头的射频封装方案,实现了全封装的薄膜铌酸锂电光调制器。测量结果表明,封装后器件的光学插入损耗小于等于5 dB,3 dB带宽大于等于40 GHz,射频半波电压小于等于3 V@1 GHz。 相似文献
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利用数值计算方法分析了高速光电探测器的耗尽区宽度与响应度及响应速度的关系.分析结果表明,耗尽区宽度选择应在响应度和响应速度之间折中,在响应度满足使用要求的情况下,尽量提高响应速度.利用该分析结果设计了台面型InGaAs/InP pin高速光电探测器材料结构.通过优化腐蚀工艺与钝化工艺,解决了器件腐蚀形貌和钝化问题.结合其他微细加工工艺完成了器件的制备,器件光敏区直径50 μm.测试结果显示,在反向偏压为5V时,暗电流小于1 nA,电容约为0.21 pF.此外,在1 310 nm激光辐照下,器件的响应度约为0.95 A/W,-3 dB带宽超过10 GHz,其性能满足10 Gbit/s光纤通信应用要求. 相似文献
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A systematic optimization procedure for the design of RCE Schottky photodetectors to achieve maximum quantum efficiency and high speed operation at 1.3 and 1.55 μm wavelengths is presented. The quantum efficiency formulation used includes the structural parameters of the photodetector and takes into account the wavelength dependence of the top and bottom mirrors reflectivities. The results have shown that the value of the thickness of the antireflection coating layer has a major influence in selecting the width of the photodetector to simultaneously achieve maximum quantum efficiency and high bandwidth at the two wavelengths. Simulated values of 270 and 40 GHz were obtained, respectively, for the 3-dB carrier-transit time-limited bandwidth and bandwidth-efficiency product for an RCE Schottky photodetector with a 0.02-μm gold layer 相似文献
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C. Rolland G. Mak K.L. Prosyk C.M. Maritan N. Puetz 《Photonics Technology Letters, IEEE》1991,3(10):894-896
Bulk InGaAsP electroabsorption waveguide modulators based on a novel multiquaternary layer design which have a tapered-fiber-modulator-tapered-fiber insertion loss as low as 4.5 dB and a small-signal frequency response in excess of 11 GHz at lambda =1.33 mu m are described. This design allows one to decouple somewhat the electrical and optical properties of the device. By choosing the appropriate quaternary composition of the core and the cladding layers, the coupling to a tapered fiber can be optimized, while the position and thickness of the p-i-n junction can be varied independently to meet operating voltage and speed requirements without affecting the waveguide mode. A -3 dB small-signal modulation bandwidth in excess of 11 GHz was measured.<> 相似文献
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Cai M. Hedekvist P.O. Bhardwaj A. Vahala K. 《Photonics Technology Letters, IEEE》2000,12(9):1177-1179
We present an all fiber-optic add/drop device based on a taper-resonator-taper structure with improved characteristics. Several gigahertz bandwidths are observed using microspheres having diameters ranging from 30 to 50 μm. Extinction ratios as high as 26 dB of the dropped channel are obtained due to nearly ideal coupling and phase matching between the fiber tapers and the small resonator. This is the first time that bit-error rate (BER) measurements have been performed on such couplers. For a device with an optical bandwidth of 3.8 GHz, the BER shows less than 2-dB penalty at 5 Gbit/s and no signs of an error floor 相似文献