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Dual Q-switched laser outputs from a single lasing medium using an intracavity MEMS micromirror array
Ralf Bauer1, Walter Lubeigt, Deepak Uttamchandani
1Centre for Microsystems and Photonics, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, UK. ralf.bauer@strath.ac.uk
Optics Letters
|September 4, 2012
Summary
This study demonstrates active Q-switching of a Nd:YAG laser using microelectromechanical system scanning micromirrors. Two independent laser outputs were achieved, offering a novel approach for laser control.
Area of Science:
- Lasers and Photonics
- Microelectromechanical Systems (MEMS)
Background:
- Traditional laser Q-switching methods can be complex and bulky.
- Developing compact and efficient laser modulation techniques is crucial for various applications.
Purpose of the Study:
- To investigate the use of an intracavity microelectromechanical system (MEMS) array for active Q-switching of a Nd:YAG laser.
- To demonstrate the simultaneous generation of two independent, equal-power laser outputs.
Main Methods:
- An intracavity array of individually controlled MEMS scanning micromirrors was employed.
- The MEMS micromirrors were used to actively Q-switch a side-pumped Nd:YAG gain medium.
- Separate actuation of two adjacent micromirrors enabled independent control of laser outputs.
Main Results:
- Two simultaneous, independent laser outputs with equal power were achieved.
- A combined average output power of 125 mW was obtained.
- Observed pulse durations were 28 ns and 34 ns FWHM at repetition frequencies of 8.7 kHz and 7.9 kHz, respectively.
- Beam quality factors (M2) of 1.2 and 1.1 were measured, with peak powers of 253 W and 232 W.
Conclusions:
- MEMS scanning micromirrors provide an effective method for active Q-switching in Nd:YAG lasers.
- The technique allows for the generation of two independent laser beams with controllable parameters.
- This approach offers a promising solution for compact and versatile laser systems.
