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Eight-wavelength receiver optical subassembly based on silica hybrid integrated technology

2019-10-24

Authors: Li, SY; Wang, LL; An, JM; Zhang, JS; Huang, NB; He, W; Wang, Y; Yin, XJ; Wang, HJ; Li, JG; Wu, YD

OPTICAL ENGINEERING

Volume: 58 Issue: 9 Published: SEP 2019 Language: English Document type: Article

DOI: 10.1117/1.OE.58.9.097101

Abstract:

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 x 25 Gb/s. (C) 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).

Full Text: https://www.spiedigitallibrary.org/journals/optical-engineering/volume-58/issue-09/097101/Eight-wavelength-receiver-optical-subassembly-based-on-silica-hybrid-integrated/10.1117/1.OE.58.9.097101.full?SSO=1



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