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Laterally periodic resonator for large-area gain lasers
Optics Express
|May 23, 2009
Summary
Laterally periodic resonators stabilize large-area lasers for coherent output. This study numerically investigates transverse modes and losses in resonators with periodic phase elements, confirming theoretical expectations.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Large-area lasers often suffer from poor transverse coherence.
- Conventional laser cavities and laser arrays have limitations in achieving stable, coherent output.
Purpose of the Study:
- To propose and investigate laterally periodic resonators for stabilizing large-area gain lasers.
- To analyze the behavior of transverse modes and mode discrimination in such resonators.
Main Methods:
- Numerical investigation using the iteration method.
- Wave-propagation calculations employing the fast Fourier transform (FFT).
- Modified Prony method for evaluating transverse mode wave functions and losses.
Main Results:
- Identification and analysis of significant low-order transverse modes.
- Evaluation of mode discrimination properties of the periodic resonator.
- Numerical results align with theoretical predictions.
Conclusions:
- Laterally periodic resonators offer a promising approach for generating transversely coherent output from large-area lasers.
- The proposed resonator design combines features of conventional cavities and laser arrays.
- Numerical simulations validate the effectiveness of periodic resonators for mode control and stabilization.
