Abstract

According to a previously reported model [ IEEE J. Quantum Electron. 27, 396 ( 1991)], the properties of injection-locked gain-guided diode laser arrays depend on the geometric characteristics of the master beam, such as the size of its waist and its incidence angle. Experimentally, two injection configurations are of particular interest: the focused injection, in which the master beam is focused on one stripe of the slave array, and the wide-beam injection, in which the master beam is shone on the whole or a part of the width of the array. We investigate experimentally and compare these two configurations. In particular, we show that, in agreement with our theory, changing the geometry of the master beam greatly alters the far-fields patterns, the locking bandwidth, and the spectrum of the locked array. We also compare the injection angle sensitivity and the beam-steering properties of the two configurations. Observations confirm our predictions, and optimal configurations are proposed.

© 1992 Optical Society of America

Highly coherent injection-locked laser diode arrays

Laurence R. Brewer
Appl. Opt. 30(3) 317-320 (1991)

Characteristics of the injection-locked master-slave lasers

Liping Zhang, Ruhai Dou, and Jianguo Chen
Appl. Opt. 47(14) 2648-2654 (2008)

Power-scalable system of phase-locked single-mode diode lasers

Lars Bartelt-Berger, Uwe Brauch, Adolf Giesen, Helmut Huegel, and Hans Opower
Appl. Opt. 38(27) 5752-5760 (1999)

Injection-beam parameter optimization of an injection-locked diode-laser array

M. K. Chun, L. Goldberg, and J. F. Weller
Opt. Lett. 14(5) 272-274 (1989)

High-speed electronic beam steering using injection locking of a laser-diode array

E. A. Swanson, G. L. Abbas, S. Yang, V. W. S. Chan, and J. G. Fujimoto
Opt. Lett. 12(1) 30-32 (1987)