High average power 2 μm generation using an intracavity PPMgLN optical parametric oscillator

Abstract

An intracavity quasi-phase-matched optical parametric oscillator (OPO) has been developed for the purpose of generating radiation with high average power and high repetition rate in the 2 μm regime. The device is a degenerate OPO based on a 3 mm thick MgO-doped periodically poled LiNbO(3) (PPMgLN) crystal, which is pumped in turn within the cavity by a diode side-pumped, Q-switched 1 μm Nd:YAG laser operating at 10 kHz. Up to 20 W broadband 2 μm radiation can be generated with a compact configuration under the crystal temperature of 115 °C. The beam profile is close to circularly symmetric with M(2) ~ 10.

Nonlinear Optical Features of Zeolitic Imidazolate Framework-67 Nanocrystals for Mid-Infrared Pulse Generation

“…Because of their strong absorption of water and their safety in regard to human eyes, 2 μm lasers have been employed in many fields, such as medicine, free-space communication, and material science. − In addition, 2 μm lasers are also utilized as pump sources for pulsed laser deposition and optical parametric oscillators . An effective way to obtain pulsed laser sources is Q-switching.…”

Compact intra-cavity pumped low-threshold passively Q-switched Ho:Sc2SiO5 laser by a LD-pumped Tm:YAP laser at room temperature

“…2 µm solid-state lasers pumped by laser diodes (LDs) have been a focus in the field of solid-state lasers. Laser mediums co-doped with Tm 3+ and Ho 3+ active ions are an efficient way to obtain 2 µm-lasers [1][2][3]. However, Tm-Ho co-doped lasers prefer to operate at low temperature to retain laser efficiency [4].…”

Diode-pumped actively Q-switched Tm:YAP/BaWO_4 intracavity Raman laser

“…Nonlinear optical processes can also produce the IR radiation. For instance, optical parametric oscillators based on MgO-doped periodically poled LiNbO 3 [5] and difference frequency generators based on GaAs [6] are efficient devices to generate the IR laser source. In addition, stimulated Raman scattering (SRS) in solid-state Raman material is a potential method to extend the spectral coverage of the present lasers, and playing a more and more important role in generating new laser lines [7,8].…”