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Opt Lett. 2007 Feb 15;32(4):370-2.

Coherent combining of the output of two semiconductor lasers using optical phase-lock loops.

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  • 1Department of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA. liangwei@its.caltech.edu

Abstract

We have experimentally demonstrated current-injection optical phase-lock loops (OPLLs) based on commercial single-section semiconductor distributed-feedback (DFB) lasers. Using two parallel OPLLs, we have obtained 87% efficient coherent power combining of the two DFB lasers. The rms differential phase error between the two lasers is about 30 degrees .

PMID:
17356656
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