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Continuous-wave cascaded second Stokes diamond Raman laser at 1477 nm
Optics Letters
|March 2, 2021
Summary
We developed a high-power, continuous-wave diamond Raman laser emitting at 1477 nm. This efficient laser achieved 63 W output power with excellent beam quality, demonstrating its potential for various applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- Fiber lasers are crucial for various applications.
- Raman lasers offer wavelength flexibility.
- Diamond is a promising material for high-power optics.
Purpose of the Study:
- To develop a high-brightness cascaded Stokes diamond Raman laser.
- To investigate the performance and limitations of such a laser system.
- To achieve efficient wavelength conversion using a novel cavity design.
Main Methods:
- Utilizing a Yb-doped fiber laser as the pump source.
- Employing a single pump pass concentric cavity design.
- Investigating thermal limitations and intra-cavity power dynamics.
Main Results:
- Achieved 63 W output power at 1477 nm in continuous-wave mode.
- Reached a conversion efficiency exceeding 30% with 45% second Stokes outcoupling.
- Demonstrated diffraction-limited beam quality.
Conclusions:
- The cascaded Stokes diamond Raman laser shows high efficiency and excellent beam quality.
- The developed cavity design effectively manages Stokes conversion and outcoupling.
- Further investigation into thermal effects and temporal behavior is warranted for optimization.
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