DocumentCode
1408732
Title
PDM-QPSK Modulator With a Hybrid Configuration of Silica PLCs and LiNbO 
Phase Modulators
Author
Yamazaki, Hiroshi ; Yamada, Takashi ; Goh, Takashi ; Kaneko, Akimasa
Author_Institution
NTT Photonics Labs., NTT Corp., Atsugi, Japan
Volume
29
Issue
5
fYear
2011
fDate
3/1/2011 12:00:00 AM
Firstpage
721
Lastpage
727
Abstract
We discuss detailed characteristics of a polarization-division-multiplexed quadrature-phase-shift-keying (PDM-QPSK) modulator with a hybrid configuration of silica planar lightwave circuits (PLCs) and LiNbO3 (LN) phase modulators. With a polarization multiplexing circuit consisting of a half-wavelength plate (HWP) and a Mach-Zehnder-type polarization beam combiner (PBC) in a PLC, the modulator outputs a PDM-QPSK signal with a inter-polarization-channel crosstalk smaller than -40 dB. The modulator also has a small insertion loss of 5.0 dB (7.7 and 8.4 dB for each polarization), and successfully operates at 100 Gb/s.
Keywords
integrated optics; integrated optoelectronics; light polarisation; lithium compounds; multiplexing equipment; optical communication equipment; optical crosstalk; optical losses; optical modulation; quadrature phase shift keying; silicon compounds; LiNbO3; Mach-Zehnder-type polarization beam combiner; PDM-QPSK modulator; PDM-QPSK signal; SiO2; half-wavelength plate; insertion loss; integrated optoelectronics; interpolarization-channel crosstalk; phase modulators; polarization multiplexing circuit; polarization-division-multiplexed quadrature-phase-shift-keying modulator; silica planar lightwave circuits; Integrated optoelectronics; optical modulation; optical planar waveguides; optical polarization; quadrature phase-shift keying (QPSK);
fLanguage
English
Journal_Title
Lightwave Technology, Journal of
Publisher
ieee
ISSN
0733-8724
Type
jour
DOI
10.1109/JLT.2010.2101052
Filename
5672564
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