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Novel active Q-switched fiber laser based on electrostatically actuated micro-mirror system
Optics Express
|June 12, 2009
Summary
This study demonstrates active Q-switching in fiber lasers using a deformable micro-mirror. This innovation allows precise control over laser pulses, enabling high peak powers and fast switching speeds.
Area of Science:
- Optics and Photonics
- Fiber Laser Technology
- Micro-electromechanical Systems (MEMS)
Background:
- Traditional Q-switching methods can be complex and bulky.
- Integrating active modulation components into fiber lasers presents challenges.
Purpose of the Study:
- To demonstrate active Q-switching of an erbium-Ytterbium fiber laser using a novel deformable micro-mirror.
- To investigate the micro-mirror's capability to control the laser cavity's Q-factor.
Main Methods:
- Utilized an electrostatically actuated deformable metallic micro-mirror as both a laser cavity reflector and a switching element.
- Engineered the micro-mirror to change curvature upon actuation, modulating the Q-factor.
- Integrated the micro-mirror into a double-clad, codoped fiber laser system.
Main Results:
- Achieved active Q-switching at frequencies ranging from 20 to 200 kHz.
- Generated short optical pulses with a Full Width at Half Maximum (FWHM) down to 300 ns.
- Demonstrated high peak powers from the fiber laser system.
Conclusions:
- The deformable micro-mirror system offers a compact, highly reflective, and achromatic solution for active Q-switching in fiber lasers.
- The demonstrated technology shows significant potential for integration into advanced laser systems.
- This approach enables precise control over laser parameters, leading to enhanced performance characteristics.
