Abstract
A new type of all-single-mode fiber depolarizer, based upon a
2 × 2 coupler and a recirculating delay line and useable with a
coherent light source, is proposed and demonstrated. The reduction
in the degree of polarization is examined theoretically and
experimentally. Design criteria and principles are
discussed. With a narrow-band laser source, the degree of
polarization was tuned between 99.8% and 1.15%. Experiments
illustrate how this depolarizer can eliminate the effects of induced
polarization fluctuation in a polarization-sensitive fiber-optic
system. The experimental results support the theoretical
model.
© 1998 Optical Society of America
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