Tunable dual-wavelength operation of a diode laser

Veronique Zambon; Nathalie McCarthy; Michel Piche

doi:10.1117/12.567453

20 December 2004 Tunable dual-wavelength operation of a diode laser

Veronique Zambon, Nathalie McCarthy, Michel Piche

Proceedings Volume 5577, Photonics North 2004: Optical Components and Devices; (2004) https://doi.org/10.1117/12.567453
Event: Photonics North, 2004, Ottawa, Ontario, Canada

Abstract

A tunable multiwavelength laser source can find several applications in spectroscopy, wavelength-division multiplexing and optical metrology. We developed a fabrication technique for holographic gratings designed to allow simultaneous lasing at two wavelengths in Littrow configuration. The design of these gratings is based on recording a constant groove spacing grating and a variable groove spacing grating on the same photoresist. Using the gratings as coupler in the external cavity of a semiconductor laser, we obtained simultaneous laser emission at two wavelengths. The gain medium we used was a commercial laser diode emitting at 675 nm. By translating the grating, we demonstrated tuning of the spectral separation of the dual-wavelength output from 0.8 nm to 6.2 nm. The fabrication technique of holographic gratings and the results obtained with the laser diode will be presented.

Citation Download Citation

Veronique Zambon, Nathalie McCarthy, and Michel Piche "Tunable dual-wavelength operation of a diode laser", Proc. SPIE 5577, Photonics North 2004: Optical Components and Devices, (20 December 2004); https://doi.org/10.1117/12.567453

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