Single-mode vertical cavity surface emitting laser by graded-index lens spatial filtering

Barry J. Koch, James R. Leger, Anand Gopinath, Zhong Wang, Robert A. Morgan

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

4.5 mW of power in a single spatial mode has been obtained from a vertical cavity surface emitting laser (VCSEL) in an external cavity setup, using a graded index (GRIN) lens with a spatial filtering high reflecting aperture deposited on its endface. The spatial filter on the GRIN lens endface forces a larger single transverse mode in the VCSEL than is obtained without it. A brightness of 5.1 × 105 W/cm2 str is demonstrated, which is 91% of the maximum achievable.

Original languageEnglish (US)
Pages (from-to)2359-2361
Number of pages3
JournalApplied Physics Letters
Volume70
Issue number18
DOIs
StatePublished - May 5 1997

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