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3 September 2019 Eight-wavelength receiver optical subassembly based on silica hybrid integrated technology
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A receiver optical subassembly (ROSA) based on hybrid integrated technology is designed and fabricated. It consists of an 8-channel arrayed waveguide grating (AWG) with 2% refractive index difference, two 4-channel positive intrinsic-negative photodetector arrays, and two 4-channel transimpedance amplifier arrays. A flat-top optical spectrum was observed because the output waveguides have a multimode structure, and the average 1-dB bandwidth of AWG channels is 2.8 nm. The insertion loss of all channels is between −1.8 and −2.9  dB, and the cross talk between adjacent channel is less than −20  dB. The ROSA shows a maximum responsivity of 0.4  A  /  W and 3-dB bandwidth of more than 22 GHz for four channels, which can meet the data transmission rate of 25  Gb  /  s. In the future, we will improve the fabrication process to achieve a transmission rate of 8  ×  25  Gb  /  s.

© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2019/$28.00 © 2019 SPIE
Shaoyang Li, Liangliang Wang, Junming An, Jiashun Zhang, Ningbo Huang, Wei He, Yue Wang, Xiaojie Yin, Hongjie Wang, Jianguang Li, and Yuanda Wu "Eight-wavelength receiver optical subassembly based on silica hybrid integrated technology," Optical Engineering 58(9), 097101 (3 September 2019).
Received: 12 April 2019; Accepted: 7 August 2019; Published: 3 September 2019

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