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

Wei Liang; Amnon Yariv; Anthony Kewitsch; George Rakuljic

doi:10.1364/ol.32.000370

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

Opt Lett. 2007 Feb 15;32(4):370-2. doi: 10.1364/ol.32.000370.

Authors

Wei Liang¹, Amnon Yariv, Anthony Kewitsch, George Rakuljic

Affiliation

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

PMID: 17356656
DOI: 10.1364/ol.32.000370

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 .