2.70 μ m emission Er:Cr:YSGG laser with LiNbO 3 Pockels cell
2008; IOP Publishing; Volume: 6; Issue: 3 Linguagem: Inglês
10.1002/lapl.200810120
ISSN1612-202X
AutoresY.H. Park, Hong Jin Kong, Y.S. Kim, G.U. Kim,
Tópico(s)Photorefractive and Nonlinear Optics
ResumoIn this study, an electro-optically Q-switched 2.70 μm emission Er:Cr:YSGG laser with a LiNbO3 Pockels cell is investigated and compared with a FTIR Q-switched scheme. It can obtain nanosecond pulse at a low voltage of 1.4 kV using a CaF2 polarizer and a LiNbO3 crystal with Brewster's angle cut ends. Wavelength generation of 2.70 μm was possible with a Fresnel loss at a rear mirror with a dielectric dichroic coating. The maximum output energy of 21.5 mJ (at 1 Hz repetition rate) was achieved in TEM21 mode using the output coupler with a reflectivity of 55% at 2.70 μm. The generated maximum pulse energy and pulse width were 13.3 mJ and 159 ns in TEM00 mode, respectively. The pulse width was shorter than 1.3 μs of the FTIR Q-switched scheme.
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