Locking and wavelength selection of an ultra-collimated single-mode diode laser bar by a volume holographic grating

Natalia Trela, Howard John Baker, Denis Hall

Research output: Contribution to journalArticle

4 Citations (Scopus)
345 Downloads (Pure)

Abstract

Wavelength-locking by a volume holographic grating (VHG) is reported for a diode laser bar with 49 single mode emitters, fitted with a dual-axis collimation phase-plate for smile elimination and excellent beam pointing correction. The much-improved VHG feedback with the ultra-collimated array beam gives 100% wavelength locking at 975 nm over a 17°C temperature range and external cavity lengths up to 110 mm. This enables a folded cavity configuration to provide a fully-locked array with wavelength selection into 200 pm channels over an 8 nm band, suitable for multi-bar dense wavelength-combining.

Original languageEnglish
Pages (from-to)4512–4517
Number of pages5
JournalOptics Express
Volume21
Issue number4
DOIs
Publication statusPublished - 25 Feb 2013

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