光学
激光器
栅栏
光子学
光电二极管
光通信
光子集成电路
光电子学
自由空间光通信
材料科学
物理
作者
Jeong Hwan Song,Tangla Kongnyuy,Mathias Prost,Hakimeh Mohammadhosseini,Roelof Jansen
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-11-22
卷期号:48 (1): 17-17
摘要
We report the optical performance of a photonic receiver for laser communication applications. The receiver is composed of 14 × 12 grating coupler arrays. The received optical signal power will be combined electrically via germanium photodiodes. The photonic receiver is designed for 20-µm to 30-µm mode field diameter (MFD) input sources. To maximize the fill factor of the 200 µm × 200 µm light-receiving area, a design strategy has been proposed. (1) Grating couplers are customized for compactness. (2) Periods of grating couplers are designed to work as end-fire and back-fire grating couplers for the same incident angle of the input laser source. (3) Different widths of waveguides are routed to minimize cross talk. The photonic receiver is evaluated with a 10-µm MFD source. As a result of the evaluation, the receiving area considering the minimum efficiency of −10.5 dB is 95% of the designed area when illuminating 20-µm to 300-µm MFD laser sources.
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