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Simultaneous multi-wavelength oscillation of Nd laser around 1.3 μm: A potential source for coherent terahertz generation

2006; Optica Publishing Group; Volume: 14; Issue: 11 Linguagem: Inglês

10.1364/oe.14.004721

1094-4087

Ardhendu Saha, Aniruddha Ray, Sourabh Mukhopadhyay, Nandita Sinha, Prasanta Kumar Datta, Pranab Kumar Dutta,

Solid State Laser Technologies

Simultaneous oscillations of 1318.8nm, 1320.0nm, 1332.6nm, 1335.0nm, 1338.2nm and 1339.0nm in a side, pulsed-diode-laser-array pumped Nd:YAG laser is realized for both free running and Q-switched operation. An average power of 1.1W is obtained for an absorbed pump power of 7.1W with an effective optical slope efficiency of 33%. The difference frequency interactions among these wavelengths may be used to generate radiation in the range 0.13-3.43THz. With the two most intense lines at 1318.8nm and 1338.2nm, it is possible to generate coherent radiation at 3.3THz with numerically estimated peak power of 0.21W in a 1.5mm thick GaSe crystal.