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本文综述近期国外研制成功的电吸收波导探测器(EAP)的原理,制备工艺,性能及其应用。由于Franz—Keldysh效应使得半导体的禁带边界发生漂移,因而电吸收波导探测器的探测度的响应波长超过了正常吸收的长波极限。若EAP探测器列阵的外加偏置电压按顺序由底到高,那么探测器列阵就能探测复用光束的多光谱讯号。这对于扩大光信息容量有着极其重要的意义。在设计时要着重考虑其波长的分辨率和信道间的串音问题。
This article summarizes the recent successful development of the principle of electroabsorption waveguide detector (EAP), preparation technology, performance and its application. Due to the Franz-Keldysh effect, the band gap of the semiconductor drifts so that the detection wavelength of the electrically conductive waveguide detector responds beyond the long wave limit normally absorbed. If the applied bias voltage of the EAP detector array is from bottom to high in order, the detector array can detect the multi-spectral signal of the multiplexed beam. This is extremely important for the expansion of optical information capacity. In the design should focus on the resolution of its wavelength and crosstalk between channels.