Optical parametric oscillator

SIGNAL (programming language)

Raman scattering

Raman spectroscopy

Materials science

Computer science

Diode

Raman laser

Laser

Physics

Optics

Programming language

Energy conversion efficiency

Laser pumping

Optoelectronics

Optics Letters

An intra-cavity optical parametric oscillator (OPO) emitting at 1.7 μm derived by Nd:YVO4 self-Raman laser is demonstrated in this Letter, with a KTiOAsO4 (KTA) crystal used as nonlinear optical crystal. A laser diode end-pumped acousto-optic Q-switched Nd:YVO4 self-Raman laser at 1176 nm was employed as the pump source. At an incident pump power of 12.1 W and a pulse repetition frequency of 60 kHz, average output power up to 1.2 W signal light at 1742 nm was obtained, with diode-to-signal conversion efficiency of 10%. The pulse width was about 11 ns and spectral line width was less than 0.5 nm for the signal light. The results show that compact intra-cavity KTA-OPO derived by Nd:YVO4 self-Raman laser is an efficient method for 1.7 μm waveband laser generation, with potential applications in biological imaging, laser therapy, special materials processing, etc.

Efficient 17 μm light source based on KTA-OPO derived by Nd:YVO_4 self-Raman laser