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

doi:10.1364/OE.21.004512

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

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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 language	English
Pages (from-to)	4512–4517
Number of pages	5
Journal	Optics Express
Volume	21
Issue number	4
DOIs	https://doi.org/10.1364/OE.21.004512
Publication status	Published - 25 Feb 2013

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Locking and wavelength selection of an ultra-collimated single-mode diode laser bar by a volume holographic gratingFinal published version, 931 KB

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

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. ",

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N2 - 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.

AB - 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.

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DO - 10.1364/OE.21.004512

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

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