Laterally coupled all solid state laser array with a three-mirror cavity

Yuko Kono; Akira Nakanishi; Fumihiko Kannari

doi:10.1117/12.308122

13 May 1998 Laterally coupled all solid state laser array with a three-mirror cavity

Yuko Kono, Akira Nakanishi, Fumihiko Kannari

Proceedings Volume 3267, Laser Resonators; (1998) https://doi.org/10.1117/12.308122
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

A Nd:YAG microchip laser array is developed and the spatial phase correlation among each the microchip laser is attained utilizing the Talbot effect in a three-mirror cavity configuration. The laterally coupled Nd:YAG microchip laser array produces a pair of spots with angular separation of (lambda) /d in its far field, where d is the distance between the adjacent sources, corresponding to an out-of-phase spatial mode coupling. The far field spot size is reduced by a factor of 4.7 compared with that obtained by incoherent adding of the individual microchip lasers. Although an external mirror positioned at the 1/4 Talbot distance from the microchip lasers source is very effective to introduce the coherence among the laser chips, the present long Talbot distance limits the output laser power due to the extremely high diffraction loss in the auxiliary cavity. Smaller beam sizes for each microchip lasers will decrease the filling factor and improve the efficiency in the Talbot cavity.

Citation Download Citation

Yuko Kono, Akira Nakanishi, and Fumihiko Kannari "Laterally coupled all solid state laser array with a three-mirror cavity", Proc. SPIE 3267, Laser Resonators, (13 May 1998); https://doi.org/10.1117/12.308122

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