Publication Type
Conference Paper
Journal Name
Proceedings of SPIE
Publication Date
Volume
9343
Conference Name
SPIE Photonics West, 2015
Conference Location
San Francisco, California, United States of America
Conference Sponsor
SPIE
Conference Date
-
Abstract
Employing a Fox-Li approach, we derived the cold-cavity mode structure and a coupled mode theory for a phased array of N single-transverse-mode active waveguides with feedback from an external cavity. We applied the analysis to a system with arbitrary laser lengths, external cavity design and coupling strengths to the external cavity. The entire system was treated as a single resonator. The effect of the external cavity was modeled by a set of boundary conditions expressed by an N-by-N frequency-dependent matrix relation between incident and reflected fields at the interface with the external cavity. The coupled mode theory can be adapted to various types of gain media and internal and external cavity designs.