Stable coherent coupling of laser diodes by a volume Bragg grating in photothermorefractive glass.
Two separate laser diodes emitting near 980 nm were coupled by a thick volume Bragg grating recorded in a photothermorefractive glass. The coupled diodes emitted at the same wavelength with a spectral width narrowed to below the resolution of the spectrum analyzer (<30 pm). Coherent emission at a pumping level greater than five times above the threshold was observed for several months with near-unity visibility of the interference pattern.
Venus
George B
GB
College of Optics and Photonics/CREOL, University of Central Florida, Orlando 32816-2700, USA.
Sevian
Armen
A
Smirnov
Vadim I
VI
Glebov
Leonid B
LB