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High-Efficiency Frequency Doubling Blue-Laser VECSEL Based on Intracavity Beam Control.
Zhuo Zhang1, Jianwei Zhang1, Ziye Du1,2
1State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel, Switzerland)
|June 27, 2024
Summary
Researchers developed a novel blue laser using a Vertical External Cavity Surface-Emitting Laser (VECSEL) with an intracavity beam control structure. This design significantly boosts frequency conversion efficiency, enabling a powerful and compact blue laser source.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Blue lasers are crucial for diverse applications like marine communication and laser medicine.
- Vertical External Cavity Surface-Emitting Lasers (VECSELs) offer high power and tunable wavelengths, enabling blue laser generation through frequency doubling.
Purpose of the Study:
- To introduce a new intracavity beam control external-cavity structure for VECSELs.
- To enhance frequency conversion efficiency and optimize blue laser output.
Main Methods:
- Developed a laser cavity stability analysis model to assess lens parameters and positions.
- Implemented an external resonant cavity with two optical lenses to control the beam waist and crystal placement.
- Utilized intracavity beam control to adjust the laser beam waist and improve frequency conversion.
Main Results:
- Achieved a frequency conversion efficiency of up to 60.2% at 488 nm.
- Generated a blue laser output exceeding 1.3 W.
- Measured a full width at half maximum of approximately 0.23 nm for the 488 nm spectrum.
Conclusions:
- The novel intracavity beam-controlled VECSEL structure effectively mitigates laser mode leakage.
- This design demonstrates significant potential for developing efficient and compact blue laser sources.
