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High-responsivity L-band micro intradyne coherent receiver using InP-based photodetector integrated with 90° hybrid
Author(s): Munetaka Kurokawa; Masaru Takechi; Hideki Yagi; Kenji Sakurai; Yoshihiro Yoneda; Yasushi Fujimura
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Paper Abstract

We demonstrate a high responsivity of 64 GBaud micro intradyne coherent receivers (Micro-ICR) operating at the wavelength range from 1565 nm to 1612 nm (L-band). The package body size is 12.0 mm × 22.7 mm × 4.5 mm, which is fully compliant with OIF implementation agreement. A newly developed InP-based photonic integrated circuit (InPPIC) for the L-band High-Bandwidth Micro-ICR is composed of the high-speed p-i-n-photodiode array (f3dB > 40GHz) and a 90° hybrid waveguide consisting of MMIs which is designed to obtain high transmittance over the L-band. They are monolithically integrated through butt-joint regrowth in which a GaInAs absorption layer of the photodiode is directly connected with a GaInAsP core layer of the 90° hybrid in order to achieve the high responsivity with high optical coupling efficiency. Furthermore, the optical couplings between optical fibers and InP-PICs are realized by low optical loss micro optics. Receiver responsivities of more than 65 mA/W for signal input and local input are achieved within the L-band at 25°C. The wide 3-dB bandwidth of 40 GHz is also confirmed using high-bandwidth TIA. These values are comparable to the coherent receiver for 64 GBaud C-band applications. This receiver module is very promising for the increase of transmission capacity through expansion of operation wavelength (C-band and L-band).

Paper Details

Date Published: 29 January 2018
PDF: 6 pages
Proc. SPIE 10561, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VII, 1056105 (29 January 2018); doi: 10.1117/12.2288196
Show Author Affiliations
Munetaka Kurokawa, Sumitomo Electric Industries, Ltd. (Japan)
Masaru Takechi, Sumitomo Electric Industries, Ltd. (Japan)
Hideki Yagi, Sumitomo Electric Industries, Ltd. (Japan)
Kenji Sakurai, Sumitomo Electric Device Innovations, Inc. (Japan)
Yoshihiro Yoneda, Sumitomo Electric Device Innovations, Inc. (Japan)
Yasushi Fujimura, Sumitomo Electric Industries, Ltd. (Japan)


Published in SPIE Proceedings Vol. 10561:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems VII
Guifang Li; Xiang Zhou, Editor(s)

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