5 June 2003 Diffractive photonic-crystal pumping of power lasers
Author Affiliations +
Proceedings Volume 4971, Gas and Chemical Lasers and Intense Beam Applications IV; (2003) https://doi.org/10.1117/12.472743
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States
In the present report a novel diffractive technique for effective optical pumping of power chemical lasers by external coherent radiation is proposed. This technique utilizes a bicomponent diffraction system coupled structurally to the unstable telescopic cavity of the laser. The space localization of the electromagnetic field inside the proposed optical scheme represents a periodic structure of diffractive maxima in the near field-zone and a narrow paraxial diffraction channel with high intensity in the far-field zone. In the Fresnel diffraction zone, the optical effect of multifocal diffractive focusing of the radiation is observed. Here the intensity in the central peaks can exceed by a factor of six (for spherical waves) to ten (for plane waves) the value of the incident wave intensity. The diffractive focusing of the input radiation opens the possibility to create a narrow diffraction initiation channel inside the laser cavity with a given space distribution and a high intensity. This technique provides a high efficiency for optical pumping and makes it possible to get a huge value of the laser energy gain. Calculations show that the ignition of laser-chemical reactions in the diffraction initiation channel under the condition of diffractive focusing of input radiation allows the laser energy to reach a gain of up to 109.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Renat R. Letfullin, Renat R. Letfullin, Henk F. Arnoldus, Henk F. Arnoldus, John T. Foley, John T. Foley, } "Diffractive photonic-crystal pumping of power lasers", Proc. SPIE 4971, Gas and Chemical Lasers and Intense Beam Applications IV, (5 June 2003); doi: 10.1117/12.472743; https://doi.org/10.1117/12.472743

Back to Top