Generation and detection of broadband coherent terahertz radiation using 17-fs ultrashort pulse fiber laser.
We describe the generation and detection of broadband terahertz radiation using an all-fiber laser. Optical pulses from a mode-locked fiber laser oscillator are compressed using nonlinear and dispersion effects induced in optical fibers, and 17-fs optical pulses with 170-kW peak power are generated at the wavelength region around 1.5 microm. By injecting these pulses into an organic crystal DAST (4-N, N-dimethylamino-4'-N"-methyl-stilbazolium tosylate), broadband terahertz field is radiated at 0.1-25 THz. The frequency region exceeding 20 THz is achieved with a fiber laser for the first time.
Takayanagi
Jun
J
EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. j_takaya@nuee.nagoya-u.ac.jp
Kanamori
So
S
Suizu
Koji
K
Yamashita
Masatsugu
M
Ouchi
Toshihiko
T
Kasai
Shintaro
S
Ohtake
Hideyuki
H
Uchida
Hiromasa
H
Nishizawa
Norihiko
N
Kawase
Kodo
K
D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007259:Infrared Rays; D007834:Lasers; D008872:Microwaves; D055100:Optical Fibers; D010783:Photometry / Q000295:instrumentation*; D014159:Transducers