Tsunashima Satoshi, Nakajima Fumito, Nasu Yusuke, Kasahara Ryoichi, Nakanishi Yasuhiko, Saida Takashi, Yamada Takashi, Sano Kimikazu, Hashimoto Toshikazu, Fukuyama Hiroyuki, Nosaka Hideaki, Murata Koichi
NTT Photonics Laboratories, NTT Corporation, Atsugi, Kanagawa, Japan.
Opt Express. 2012 Nov 19;20(24):27174-9. doi: 10.1364/OE.20.027174.
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.
我们展示了一种集成了基于二氧化硅的平面光波电路（PLC）的紧凑型可变光衰减器（VOA）相干接收机。为实现紧凑型接收机，我们将一个VOA与偏振分束器和光学90度混合器集成在单个PLC芯片中，并采用由微透镜阵列和带有高速直角信号线的光电二极管（PD）子载波组成的稳定光电耦合系统。我们将一个VOA和一个相干接收机集成在一个27x40x6 mm的封装中，并成功地解调了一个128 Gbit/s偏振复用（PDM）正交相移键控（QPSK）信号，该信号在VOA辅助下具有超过30 dB的宽动态范围。
