IEICE Electronics Express
Online ISSN : 1349-2543
High receiver responsivity and low dark current of InP-based pin-photodiode array monolithically integrated with 90° hybrid and spot-size converter using selective embedding regrowth
Hideki YagiNaoko InoueTakehiko KikuchiRyuji MasuyamaTomokazu KatsuyamaYoshihiro TateiwaKatsumi UesakaYoshihiro YonedaMasaru TakechiHajime Shoji
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2015 Volume 12 Issue 2 Pages 20141018


The InP-based pin-photodiode array monolithically integrated with a 90° hybrid and spot-size converters was realized using selective embedding regrowth for compact 100 Gb/s coherent receivers. The low dark current of less than 500 pA up to 85 °C was attained by InP passivation effect in four-channel pin-photodiodes. As a receiver using these photodiode arrays, a receiver responsivity including total loss of 6.7 dB in the 90° hybrid and intrinsic loss of 3 dB in the polarization beam splitter was higher than 0.060 A/W between −5 °C and 85 °C through the integration of the spot-size converter. Responsivity imbalance of the In-phase and Quadrature channels was also less than 0.5 dB over the C-band.

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© 2015 by The Institute of Electronics, Information and Communication Engineers
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