Low-loss wavelength tuning of a mid-infrared Cr2+:ZnSe laser using a Littrow-mounted resonant diffraction grating
✍ Scribed by N. Vermeulen; P. Wasylczyk; S. Tonchev; P. Muys; H. Ottevaere; O. Parriaux; H. Thienpont
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 146 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1612-2011
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✦ Synopsis
We report the first demonstration of resonantgrating-based laser wavelength tuning in the mid-infrared spectral domain and with Littrow mounting of the grating. We show for a mid-infrared Cr:ZnSe laser that this tuning technique is much more wavelength selective than prism-based tuning, while inducing very low cavity losses (around 2%), which are at least two times smaller than in the case of a standard metal grating. Furthermore, the resonant grating allows tuning the Cr:ZnSe laser over as much as 400 nm around a center wavelength of 2.38 μm. This shows the potential of employing Littrow-mounted resonant diffraction gratings for controlling and tuning the emission wavelength of lasers emitting in the mid-infrared spectral domain and other wavelength regions.
Resonant diffraction grating designed for tuning a Cr:ZnSe laser in Littrow configuration