| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable-sized terahertz wave generation device and generation method by controlling a time lag of two laser beams driven by a single laser light source for excitation. SOLUTION: The terahertz wave generation device is equipped with: a single laser light source 2 for excitation; a branching optical system 3 which branches light impinging from the light source 2 into two; a laser light source 4 of a first frequency, which generates a laser beam 7 at the first frequency for terahertz wave generation in response to incidence of one of two branched laser beams for excitation; a laser light source 5 of a second frequency, which generates a laser beam 8 at the second frequency for terahertz wave generation in response to incidence of the other of two branched laser beams for excitation; a multiplexing optical system 6 which multiplexes the laser beam 7 and the laser beam 8; and a crustal 9 for terahertz wave generation on which the laser beam at the first frequency and the laser beam at the second frequency, which are multiplexed, impinge from the multiplexing optical system 6. A terahertz wave 25 is generated by difference frequency mixing of the laser light 7 at the first frequency and the laser light 8 at the second frequency by the crystal 9 for terahertz wave generation. COPYRIGHT: (C)2010,JPO&INPIT |
