Open AccessSimultaneous multi-wavelength oscillation of Nd laser around 1.3 μm: A potential source for coherent terahertz generation
Author(s) -
Ardhendu Saha,
Aniruddha Ray,
Sourabh Mukhopadhyay,
Nandita Sinha,
Prasanta Kumar Datta,
Pranab Dutta
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.004721
Subject(s) - terahertz radiation , laser , optics , wavelength , materials science , radiation , oscillation (cell signaling) , optoelectronics , diode , slope efficiency , fiber laser , physics , chemistry , biochemistry
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.