Narrowing the far field of a Y-junction laser array using a customized spatial filter in an external cavity
- 9 May 1988
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 52 (19) , 1560-1562
- https://doi.org/10.1063/1.99080
Abstract
A study of the spatially resolved spectrum of individual emitters in a Y-junction laser array shows that the array is not completely locked. The use of an external cavity with a novel, customized spatial filter is demonstrated to yield a stable output beam, which increases from 1.25 times the diffraction limit at low power to 1.6 times the diffraction limit at 120 mW without shifting.Keywords
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