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Fast heterodyne optical phase-lock loop using double quantum well laser diodes

Fast heterodyne optical phase-lock loop using double quantum well laser diodes

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The first experimental demonstration is reported of a heterodyne optical phase-lock loop (OPLL) using semiconductor lasers without external cavities or other linewidth narrowing methods. For a total loop propagation delay of 3 ns and a loop filter bandwidth of 700 MHz, a phase error variance of 1.02 rad2 was achieved in 500 MHz measurement bandwidth.

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