Title

Mode selection and phase locking of sidelobe-emitting semiconductor laser arrays via reflection coupling from an external narrow-bandwidth grating

Authors

Authors

S. Riyopoulos; G. Venus;L. Glebov

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Appl. Phys.

Keywords

LOCKED VCSEL ARRAYS; BEAM; Physics, Applied

Abstract

A phase locked array design, utilizing direct reflection feedback between adjacent cavities by an external grating, is analyzed and proposed. The narrow grating reflection bandwidth causes longitudinal mode selection, while the array geometry causes transverse wavenumber selection through the coupling strength. As a result, only one among the free running cavity eigenmodes can couple effectively into a phase locked collective eigenmode. The coupled array mode is experiencing the high reflectivity of the grating and surpasses the low gain of the free running modes, that experience only a much lower reflectivity from the cavity edge antireflective coating. These results suggest that in-phase locking and single mode operation can be achieved simultaneously through the use of an external narrow-bandwidth grating. (C) 2008 American Institute of Physics.

Journal Title

Journal of Applied Physics

Volume

103

Issue/Number

11

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

15

WOS Identifier

WOS:000256706200008

ISSN

0021-8979

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