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Solid-state laser spectral narrowing using a volumetric photothermal refractive Bragg grating cavity mirror
Te-yuan Chung1, Alexandra Rapaport, Vadim Smirnov
1College of Optics and Photonics, CREOL and FPCE, University of Central Florida, Orlando 32816, USA.
Optics Letters
|January 31, 2006
Summary
Broadband Ti:sapphire and Cr:LiSAF lasers achieved dramatic spectral narrowing using volumetric Bragg gratings. This innovation significantly boosted spectral brightness by 1000 times without altering output power.
Area of Science:
- Laser Physics
- Materials Science
Background:
- Broadband lasers like Ti:sapphire and Cr:LiSAF are essential for various applications.
- Achieving narrow spectral output from these lasers typically requires complex setups.
Purpose of the Study:
- To demonstrate a simple method for spectral narrowing of broadband lasers.
- To enhance the spectral brightness of Ti:sapphire and Cr:LiSAF lasers.
Main Methods:
- Replaced the output mirror of Ti:sapphire and Cr:LiSAF lasers with a reflective volumetric Bragg grating.
- The Bragg grating was recorded in photothermal refractive glass.
Main Results:
- Achieved dramatic spectral narrowing for both Ti:sapphire and Cr:LiSAF lasers.
- Maintained output power comparable to traditional dielectric coated mirrors.
- Increased spectral brightness by three orders of magnitude.
Conclusions:
- Volumetric Bragg gratings offer a simple and effective solution for spectral narrowing of broadband lasers.
- This method significantly enhances spectral brightness without compromising output power.
