Open AccessSilica-based, compact and variable-optical-attenuator integrated coherent receiver with stable optoelectronic coupling system
Author(s) -
Satoshi Tsunashima,
Fumito Nakajima,
Yusuke Nasu,
Ryoichi Kasahara,
Yoichiro Nakanishi,
Takashi Saida,
Takashi Yamada,
Kimikazu Sano,
Toshikazu Hashimoto,
Hidetoshi Fukuyama,
Hideaki Nosaka,
Koichi Murata
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.027174
Subject(s) - optics , demodulation , optical attenuator , photodiode , materials science , phase shift keying , optoelectronics , attenuator (electronics) , physics , optical fiber , bit error rate , multi mode optical fiber , computer science , attenuation , telecommunications , decoding methods , channel (broadcasting)
We demonstrate a compact and variable-optical-attenuator (VOA) integrated coherent receiver with a silica-based planar lightwave circuit (PLC). To realize the compact receiver, we integrate a VOA in a single PLC chip with polarization beam splitters and optical 90-degree hybrids, and employ a stable optoelectronic coupling system consisting of micro lens arrays and photodiode (PD) subcarriers with high-speed right-angled signal lines. We integrate a VOA and a coherent receiver in a 27x40x6 mm package, and successfully demodulate a 128-Gbit/s polarization division multiplexed (PDM) quadrature phase shift keying (QPSK) signal with a VOA-assisted wide dynamic range of more than 30 dB.