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Highly efficient phase locking of four diode pumped Nd:YAG laser beams |
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| Authors: | S. Menard M. Vampouille A. Desfarges-Berthelemot V. Kermene B. Colombeau C. Froehly |
| Affiliation: | a Thomson – CSF Optronique, Rue Guynemer, BP 55, 78283 Guyancourt Cedex, France b Institut de Recherches en Communications Optiques et Microondes, UMR CNRS 6615 Faculté des Sciences, 123 Av. A. Thomas, 87060 Limoges Cedex, France |
| Abstract: | We describe the mutual phase-locking of four Nd:YAG beams longitudinally end-pumped by four fiber-coupled diode lasers. Mutual phase-locking is performed by two types of diffractive components located inside a telescopic Fabry–Perot resonator. The control of the phase-locking is shown and the different spatial eigenmodes connected with the pumping geometry in the resonator are theoretically and experimentally studied. 1.2 W is obtained in a single mode stable pattern with 30% optical-to-optical conversion efficiency in the continuous wave regime. |
| Keywords: | End-pumped Nd:YAG lasers Multi-axis lasers Laser phase-locking Fourier transform cavity Intra-cavity spatial filtering |
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