Laser beam transformation technique for high-power laser diode linear arrays

Paul Grenier; Yves Taillon; Min Wang; Patrice Topart; Daniel Asselin; André Parent

doi:10.1117/12.655311

15 February 2006 Laser beam transformation technique for high-power laser diode linear arrays

Paul Grenier, Yves Taillon, Min Wang, Patrice Topart, Daniel Asselin, André Parent

Proceedings Volume 6104, High-Power Diode Laser Technology and Applications IV; 61040R (2006) https://doi.org/10.1117/12.655311
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

This paper reports on a novel pair of microlens arrays (MLA's) for efficient coupling of the high aspect ratio optical beam emitted by high-power laser diode linear arrays (also referred to as laser diode bars) into the core of multimode optical fibers. These novel MLA's overcome the limitations observed when using high fill factors laser diode bars. The MLA designs are described. Results from modelling work show good coupling performances for laser diode bars with fill factors up to 75%. The technique for fabricating the complex surface profiles of the MLA's is discussed. Masters are first fabricated and MLA's are then replicated, so that volume production at low cost can be envisioned. The fabricated MLA's have been used for reshaping and fiber coupling the output of a 10-mm laser diode bar. An efficiency of 74% has been obtained when coupling into an optical fiber having a core diameter of 400 μm and a numerical aperture of 0.22.

Citation Download Citation

Paul Grenier, Yves Taillon, Min Wang, Patrice Topart, Daniel Asselin, and André Parent "Laser beam transformation technique for high-power laser diode linear arrays", Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 61040R (15 February 2006); https://doi.org/10.1117/12.655311

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KEYWORDS

Semiconductor lasers

Optical fibers

Microlens

High power lasers

Collimation

Diodes

Photoresist materials

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