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Depolarized source for high-power operation of a remote waveguide modulator

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Abstract

Remote operation of integrated-optical modulators requires a definite polarization input to the device, usually at the end of a long fiber run. This problem has been dealt with by the use of polarization-maintaining fiber (PMF), polarization-control devices, or a depolarized source1-3 followed by ordinary fiber and a polarizer. The motivation for the latter technique is its ability to replace expensive PMF with ordinary fiber. In this study we demonstrate a depolarized source using a guided- wave device to achieve phase modulation between orthogonal states. This approach simultaneously increases the threshold for stimulated Brillouin scattering4 (SBS), providing a distinct advantage over alternative schemes2,3 and making it useful for high-power operation over long fiber runs.

© 1994 Optical Society of America

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