Modeling of phase-locking of slab-lasers with hybrid resonators

Anatoly P. Napartovich; Nickolai N. Elkin; Vera N. Troshchieva; James P. Reilly

doi:10.1117/12.469501

6 June 2002 Modeling of phase-locking of slab-lasers with hybrid resonators

Anatoly P. Napartovich, Nickolai N. Elkin, Vera N. Troshchieva, James P. Reilly

Proceedings Volume 4629, Laser Resonators and Beam Control V; (2002) https://doi.org/10.1117/12.469501
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

RF CO₂ slab lasers with waveguide-unstable resonators demonstrated last years to be an effective tool for many applications. Increase of the total power using technique of phase locking of lasers can be achieved without deterioration of beam quality. Till now, no attempt was made to develop such technique for slab-laser arrays. Authors propose to arrange optical coupling between individual resonators using beams diffracting over the edge of convex mirror in asymmetric unstable resonator. 3-dimensional diffraction code was applied taking into account refractive index gradients and gain saturation effects in combination with diffraction and waveguiding effects in a whole optical tract including the coupling channel. In-phase and out-of-phase mode competition was studied in dependence on parameters of resonators and active medium, assuming the lasers were identical. Key parameters for phase locking are defined: optical coupling channel length and position of the resonator optical axis relative to the nearest edge of the convex mirror. The numerical simulations evaluate tolerances for the length of optical coupling channel. A range of the key parameters providing in-phase mode stable operation at high above threshold conditions is found for a particular laser construction. An option to generalize optical coupling method to N-slab-laser array is discussed.

Citation Download Citation

Anatoly P. Napartovich, Nickolai N. Elkin, Vera N. Troshchieva, and James P. Reilly "Modeling of phase-locking of slab-lasers with hybrid resonators", Proc. SPIE 4629, Laser Resonators and Beam Control V, (6 June 2002); https://doi.org/10.1117/12.469501

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