Share Email Print
cover

Proceedings Paper

Characterization of coherent receiver using polarization-multiplexed source generated from coherent transmitter
Author(s): Qiang Wang; Yang Yue; Massimiliano Salsi; Bo Zhang; Andre Vovan; Jon Anderson
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Intradyne coherent receiver (ICR) is an essential component for modern coherent systems. Critical parameters of ICR include frequency response, bandwidth, and gain imbalance. Conventionally one creates heterodyne beating between tunable laser source (TLS) and local oscillator, and sweeps frequency of TLS to measure those parameters. A complicated control loop aligns state of polarization (SoP) of TLS to 45/135 degree of principle axis of polarization beam splitter. Otherwise unequal amount of power will launch into two polarizations, leading to inaccurate result. To overcome this complexity, we present a novel scheme to characterize ICR using polarization-multiplexed laser source generated using internal components of coherent transmitter. The optical signals on two polarizations are modulated with sinusoidal signal at different frequencies. If frequency difference is larger than laser line width, the output at the coherent transmitter is a polarization-multiplexed laser source. This method allows on-board measurement of analog front-end of coherent receiver by connecting coherent transmitter with coherent receiver. Influence of automatic bias control and radio frequency amplifier is also discussed. Another method is to combine outputs of two separate TLSs with orthogonal polarization through a polarization beam combiner. Both methods lead to robust performance without active control of SoP. The measurement accuracy using polarization-multiplexed laser source is the same as that of the conventional method. The intrinsic resiliency to polarization change leads to simple setup and enables in-field characterization of ICR.

Paper Details

Date Published: 28 January 2017
PDF: 6 pages
Proc. SPIE 10130, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VI, 101300F (28 January 2017); doi: 10.1117/12.2250982
Show Author Affiliations
Qiang Wang, Juniper Networks, Inc. (United States)
Yang Yue, Juniper Networks, Inc. (United States)
Massimiliano Salsi, Juniper Networks, Inc. (United States)
Bo Zhang, Juniper Networks, Inc. (United States)
Andre Vovan, Juniper Networks, Inc. (United States)
Jon Anderson, Juniper Networks, Inc. (United States)


Published in SPIE Proceedings Vol. 10130:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems VI
Guifang Li; Xiang Zhou, Editor(s)

© SPIE. Terms of Use
Back to Top