Abstract
Feature
Issue on Optical Performance Monitoring (OPM). 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
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