Abstract

We report on an in-band optical signal-to-noise ratio monitoring technique for wavelength division multiplexed channels. Our proposal relies on the different degree of polarization between the signal (highly polarized) and the noise (not polarized). Using this principle, we divide the signal under test into two orthogonal polarization components and induce a differential group delay via a controlled birefringence apparatus that produces a wavelength-dependent shift of the polarization state of the signal. After a linear polarizing filter, high-resolution spectral analysis allows measurement of the amplified spontaneous emission noise level. The method is tested by experimental measurements of a 40 Gbit/s differential phase-shift keying channel showing very good performance.

© 2010 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
In-service light path PMD (polarization mode dispersion) monitoring by PMD compensation

X. Steve Yao, Xiaojun Chen, T. J. Xia, Glenn Wellbrock, David Chen, Daniel Peterson, Paul Zhang, Ansel Belisle, Lei Dong, and Tao Yu
Opt. Express 18(26) 27306-27318 (2010)

Influence of polarization state, baud rate and PMD on non-linear impairments in WDM systems with mixed PM (D)QPSK and OOK channels

Mohsan Niaz Chughtai, Marco Forzati, Jonas Mårtensson, and Danish Rafique
Opt. Express 20(7) 8155-8160 (2012)

Brillouin optical spectrum analyzer monitoring of subcarrier-multiplexed fiber-optic signals

Yonatan Stern, Kun Zhong, Thomas Schneider, Yossef Ben-Ezra, Ru Zhang, Moshe Tur, and Avi Zadok
Appl. Opt. 52(25) 6179-6184 (2013)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription