Chirping effects in phase-coupled laser arrays

Amos Hardy, William Streifer, Marek Osinski

Research output: Contribution to journalArticlepeer-review

Abstract

An improved coupled-mode theory is used to analyse various phase-coupled, index-guided diode laser arrays. Different designs of 10-guide arrays are considered,including uniform, linearly chirped, Λ-chirped, V-chirped, and saw-tooth arrays. Lower-order supermodes are favored when there is excess gain between the guides. However, a common problem with large arrays is the relatively poor mode discrimination. This can be remedied by proper gain tailoring, which results in significantly higher gain for the lowest-order supermode. Further improvement can be achieved with moderately strong coupling, when the highest-order supermodes can be made cut-off, thus reducing mode competition due to spatial hole burning effects above threshold.

Original languageEnglish
Pages (from-to)443-450
Number of pages8
JournalIEE Proceedings, Part J: Optoelectronics
Volume135
Issue number6
DOIs
StatePublished - 1988
Externally publishedYes

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