17 January 2005 Beam shaping and fiber coupling of high-power laser diode arrays
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Proceedings Volume 5644, Optoelectronic Devices and Integration; (2005); doi: 10.1117/12.573649
Event: Photonics Asia, 2004, Beijing, China
Abstract
The extreme divergence and the astigmatism of the high power laser diode array (LDA) require optics with complex lens structure and high performance. A monolithic micro- optic system is designed to shape the beam of LDA and couple the output of LDA with low NA fiber. The structure and principle of the micro-optic system is described in detail. The actual performance of the micro-optic system is studied by measuring P-I properties for both fiber coupled output and the LDA output, and their dependences on deviations in x, y, z directions. The light output of 980nm, 19-emitter LDA is shaped by this micro-optic system and coupled into a fiber with 400µm diameter, Numerical Aperture (NA) 0.22. The overall efficiency is more than 60%. The main factors effecting coupling efficiency are analyzed.
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Xiao-hui Ma, Xu Li, Guo-Jun Liu, Quanlin Shi, Desheng Xin, Jian-jia Zhang, "Beam shaping and fiber coupling of high-power laser diode arrays", Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); doi: 10.1117/12.573649; https://doi.org/10.1117/12.573649
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KEYWORDS
Semiconductor lasers

Fiber couplers

Beam shaping

Diodes

Micro optics

High power lasers

Fiber coupled lasers

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