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Proceedings Paper

Coherent diode laser arrays
Author(s): Theodore C. Salvi; Sylvia Dorato
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Paper Abstract

Semiconductor diode lasers have significant advantages over other types of lasers in compactness and efficiency. They also can be mass produced using techniques of the electronics industry, offering the hope for very low cost per laser. However, the power of an individual single- spatial-mode diode laser is limited to a few watts. The coherent power of diode lasers can be increased by making a coherent array. We will discuss a variety of approaches that have been employed to make coherent arrays of diode lasers. The first group of techniques are those using a master oscillator, either in a branching master-oscillator-power- amplifier configurations, or in a multiple injection locked configuration. Systems without a master oscillator can either be one large resonator with many segmented gain regions, or coupled oscillators. The coupled oscillators are divided into those coupled to adjacent elements only (series coupling), and those coupled to many other elements (parallel coupling). We also will show how nonlinear optics have been used to implement some of the above architectures. These various methods have produced scientific success in coupling arrays together, but each has drawbacks that have prevented coherent diode arrays from achieving commercial success.

Paper Details

Date Published: 13 May 1998
PDF: 7 pages
Proc. SPIE 3267, Laser Resonators, (13 May 1998); doi: 10.1117/12.308096
Show Author Affiliations
Theodore C. Salvi, Logicon R&D Associates (United States)
Sylvia Dorato, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 3267:
Laser Resonators
Alexis V. Kudryashov; Pierre Galarneau, Editor(s)

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