Investigation of noise correlations in the phase-locked class-A VECSEL array

Author:

Karuseichyk SopfyORCID,Pal Vishwa1ORCID,Sahoo Sahil1,Beaudoin Grégoire2,Sagnes Isabelle2ORCID,Bretenaker Fabien3ORCID

Affiliation:

1. Indian Institute of Technology Ropar

2. Université Paris-Saclay

3. Indian Institute of Technology Kharagpur

Abstract

We theoretically and experimentally study the noise correlations in an array of lasers based on a VECSEL (Vertical External Cavity Surface Emitting Laser) architecture. The array of two or three lasers is created inside a planar degenerate cavity with a mask placed in a self-imaging position. Injection from each laser to its neighbors is created by diffraction, which creates a controllable complex coupling coefficient. The noise correlations between the different modes are observed to be dramatically different when the lasers are phase-locked or unlocked. These results are well explained by a rate equation model that takes into account the class-A dynamics of the lasers. This model permits the isolatation of the influence of the complex coupling coefficients and of the Henry α-factor on the noise behavior of the laser array.

Funder

Science and Engineering Research Board

RENATECH

PAUSE

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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