Use of a doubly polarized laser for remote powering of an integrated optical modulator

Stable operation of an integrated optic modulator is demonstrated using a 1.3 mu m doubly polarized laser as a depolarized source in conjunction with a long run of ordinary fiber. The laser is found to be unusually susceptible to feedback due to gain competition between the polarization modes. The resulting low-frequency polarization noise is significantly reduced by the addition of fiber isolators to the system.>