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Twisted Hi-Bi Fiber DFB Lasers with Controllable Output Polarization

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Abstract

We demonstrate that single polarization, hi-bi fiber DFB lasers are in general characterized by elliptical state of polarization, due to the in-built fiber birefringence axis rotation. Externally applied birefringence-axis twist is shown to provide accurate control of the output SOP. Continuous tuning from circular to linear polarization, with PER of ~40dB has been demonstrated.

© 2012 Optical Society of America

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