A novel cladding structure for semiconductor quantum-well lasers with small beam divergence and low threshold current

Shun-Tung Yen*, Chien Ping Lee

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

A novel cladding structure is proposed and analyzed for semiconductor quantum-well lasers to achieve a small vertical-beam divergence and a low threshold current density simultaneously. This cladding structure is designed to guide a wide optical mode but with a high peak intensity in quantum wells. The wide expansion of the optical mode results in a small beam divergence. In addition, the high optical intensity in quantum wells causes a low threshold current density. This novel cladding structure is optimized. The result shows that this type of cladding structures can achieve a beam divergence as small as 14.6° while the threshold current density remains small.

Original languageEnglish
Pages (from-to)1588-1595
Number of pages8
JournalIEEE Journal of Quantum Electronics
Volume32
Issue number9
DOIs
StatePublished - 1 Dec 1996

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