<p><a href="http://www.osa-jon.org/features/OPM_2004.html">Feature Issue on Optical Performance Monitoring (OPM)</a></p> Simultaneous monitoring of power, wavelength, and channel number for a tunable laser is demonstrated by use of a combination of an optical isolator, an etalon, a polarizer, and photodiodes. The mode hopping and incomplete-tuning problems that might arise in tuning the laser can be detected with the proposed approach. The spectral response of the monitoring module can be adjusted to match the wavelength-tuning range. The spectral adjustment can be performed by rotating the input polarization or the output polarizer. It can also be tuned by rotating the second stage if a two-stage isolator is used. We demonstrate experimentally the feasibility of this approach by use of discrete fiber-pigtailed components.
© 2003 Optical Society of America
Optical Performance Monitoring
Original Manuscript: November 3, 2003
Revised Manuscript: November 2, 2003
Published: May 26, 2004
Optical Performance Monitoring (2004) Journal of Optical Networking
Chun-Liang Yang, San-Liang Lee, and Jingshown Wu, "Optical-isolator-based modules for monitoring DWDM tunable lasers," J. Opt. Netw. 3, 452-463 (2004)