SINGLE-MODE VERTICAL-CAVITY SURFACE-EMITTING LASER BY GRADED-INDEX LENS SPATIAL-FILTERING

Authors
KOCH BJ LEGER JR GOPINATH A WANG Z
Citation
Bj. Koch et al., SINGLE-MODE VERTICAL-CAVITY SURFACE-EMITTING LASER BY GRADED-INDEX LENS SPATIAL-FILTERING, Applied physics letters, 70(18), 1997, pp. 2359-2361
Citations number
17
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
70
Issue
18
Year of publication
1997
Pages
2359 - 2361
Database
ISI
SICI code
0003-6951(1997)70:18<2359:SVSLBG>2.0.ZU;2-A
Abstract
4.5 mW of power in a single spatial mode has been obtained from a vert ical cavity surface emitting laser (VCSEL) in an external cavity setup , using a graded index (GRIN) lens with a spatial filtering high refle cting aperture deposited on its endface. The spatial filter on the GRI N lens endface forces a larger single transverse mode in the VCSEL tha n is obtained without it. A brightness of 5.1x10(5) W/cm(2) str is dem onstrated, which is 91% of the maximum achievable. (C) 1997 American I nstitute of Physics.