Injection-seeded terahertz-wave parametric oscillator

Abstract

Macrospin and micromagnetic studies of tilted polarizer spin-torque nano-oscillators J. Appl. Phys. 112, 063903 (2012) New-generation of cryogenic sapphire microwave oscillators for space, metrology, and scientific applications Rev. Sci. Instrum. 83, 085113 (2012) Design and numerical simulations of a high power 0.15 THz oscillator Phys. Plasmas 19, 083111 (2012) Influence of thermal fluctuations on the emission linewidth in MgO-based spin transfer oscillators

Autocorrelator for the measurement of a quasi-continuous-wave laser beam sinusoidally modulated at 17 THz

“…where s (1) and s (2) are the cross sections of one-and twophoton absorptions, respectively, P is the peak power of the laser, and z is the parameter, defined as z ¼ 2z/b, in which z is the distance from the beam waist to the photocathode surface, and b is the confocal parameter. The ratio of the signals arising from one-photon (first term) and two-photon (second term) processes can then be calculated using Eq.…”

“…In order to generate a terahertz wave, it is necessary to develop a laser source that emits at two different frequencies for the generation of a beat signal comprised of a sinusoidal wave in the terahertz range. For example, a nonlinear optical crystal can be installed in a high-finesse cavity, to generate a beat signal by coherent interaction with a pump source [1]. A continuous-wave (CW) Raman laser arising from molecular hydrogen in a high-finesse cavity for generating a Stokes beam, the frequency of which is determined by a Raman shift frequency (587 cm À1 for the rotational transition and 4155 cm À1 for the vibrational transition) has recently been reported.…”

Terahertz-Wave Parametric Sources

“…The principles of the terahertz wave parametric generator (TPG) (Shikata et al, 2000;Sato et al, 2001;Shikata et al, 2002) and the terahertz wave parametric oscillator (TPO) (Kawase et al, 1996; allow building systems that are not only compact but also operate at room temperature, making them suitable as practical sources. In principle, both a narrow linewidth and a wide tunability are possible in injection-seeded TPG/TPO (is-TPG/TPO) systems with single-longitudinal-mode near-infrared lasers as seeders Imai et al, 2001). In basic research, these sources were pumped using flash lamp-or laser diode-pumped Qswitched Nd:YAG lasers which have Gaussian beam profile and long pulse widths (15 ~ 25 ns).…”

Transform-limited, achromatic injection-seeded terahertz-wave parametric generator

“…The injection-seeded TPO (is-TPO) 12 and the injection-seeded TPG (is-TPG) [14][15][16][17][18][19] has been demonstrated to generate Fourier transform-limited THz-wave radiation. TPGs, as compared to TPOs, are especially preferred for external seeding by narrow linewidth light sources such as a CW tunable SLM laser for two reasons.…”

“…We have focused on the development of THz-wave parametric oscillator (TPO) [9][10][11][12][13] and THz-wave parametric generator [14][15][16][17][18][19] (TPG) based on the laser light scattering from the A 1 -symmetry polariton mode of MgO:LiNbO 3 nonlinear crystal, which generated widely tunable, coherent THz-wave radiations with compact and room-temperature operation.…”