光通信链路中集成芯片的收发一体工作

Integrated Chip for Simultaneous Transmission and Reception in Optical Communication Links

在PIN光电探测器(PIN-PD)结构的垂直方向上集成垂直腔面发射激光器(VCSEL)结构单元,实现了收发一体式工作的集成光电芯片对,可用于进一步提高光互连的性能。该集成光电芯片可以同时对两个波段进行收发一体工作,一端进行中心波长为805 nm的光信号的发送和中心波长为850 nm的光信号的接收,另一端进行中心波长为850 nm的光信号的发送和中心波长为805 nm的光信号接收。仿真优化805 nm波长处光信号发送端的结构与性能,理论分析结构中VCSEL单元和PIN-PD单元工作时的电学隔离和光学解耦,最终证实本结构可以同时进行收发一体的工作。

This paper proposes an integrated optoelectronic chip pair that can simultaneously receive and transmit signals by integrating a vertical cavity surface emitting laser(VCSEL)unit in the vertical direction of a PIN photodetector(PIN-PD)unit.The two units can transmit in two bands at the same time.In particular,one terminal can transmit and receive optical signals at the central wavelengths of 805 and 850 nm,respectively;the other terminal can transmit and receive optical signals at the central wavelengths of 850 and 805 nm,respectively.This study mainly introduces and optimizes the structure and performance of one end of the optical signal transmission at the wavelength of 805 nm and theoretically analyzes the electrical isolation and optical decoupling of the VCSEL and PIN-PD units,which further ensures that the structure can work as a transceiver at the same time.