Coherent combining of the output of two semiconductor lasers using optical phase-lock loops.
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 .
Liang
Wei
W
Department of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA. liangwei@its.caltech.edu
Yariv
Amnon
A
Kewitsch
Anthony
A
Rakuljic
George
G