Second-Stokes dual-wavelength operation at 1321 and 1325 nm ceramic Nd:YAG/BaWO_4 Raman laser

Abstract

A diode-pumped, actively Q-switched second-Stokes dual-wavelength laser employing ceramic Nd:YAG as the gain medium and BaWO(4) as the Raman medium is demonstrated. The dual-wavelength Raman laser emission at 1321 and 1325 nm is based on the dual-wavelength fundamental laser emission at 1061 and 1064 nm. With a pump power of 18.4 W and pulse repetition frequency of 15 kHz, a maximum dual-wavelength output power of 1.67 W was obtained, comprising a 0.75 W, 1321 nm laser component and a 0.92 W, 1325 nm laser component. The corresponding dual-wavelength second-Stokes pulse width was 2.9 ns.

Q-switched mode-locking of second-Stokes pulses in a diode-pumped YVO4/Nd:YVO4/YVO4self-Raman laser

“…SRS has been recognized as an effective method for laser frequency conversion. Because SRS is a cascading nonlinear frequency conversion process, second-Stokes waves can be generated when the first-Stokes optical field reaches adequate power intensity as a pump source for SRS [1,2]. The Wang group demonstrated a Q-switched second-Stokes dualwavelength laser with ceramic Nd:YAG as the gain medium and BaWO 4 as the Raman medium separately [1].…”

“…Because SRS is a cascading nonlinear frequency conversion process, second-Stokes waves can be generated when the first-Stokes optical field reaches adequate power intensity as a pump source for SRS [1,2]. The Wang group demonstrated a Q-switched second-Stokes dualwavelength laser with ceramic Nd:YAG as the gain medium and BaWO 4 as the Raman medium separately [1]. Passively and actively Q-switched Nd:YVO 4 self-Raman lasers have been widely demonstrated during the current decade [2][3][4][5].…”

“…Recently, our group reported a Q-switched self-Raman laser at a second-Stokes wavelength of 1764 nm with a composite YVO 4 /Nd:YVO 4 /YVO 4 crystal as the gain medium and the Raman medium simultaneously [2]. But mode-locking was not achieved in the second-Stokes lasers reported in [1,2]. Kerr-lens mode-locked (KLM) lasers with Nd:YVO 4 crystals were recently achieved [6,7].…”

Efficient Raman Laser Based on Bulk α-BaTeMo2O9Crystals

“…timulated Raman scattering (SRS) in bulk crystal material was first reported in 1963, 1) and after that, SRS acting as a simple and efficient method of nonlinear optical conversion has been widely used by choosing crystalline Raman materials. [2][3][4][5][6] In this regime, GaN-based heterostructures is a novel material, where the Raman scattering intensity could be regulated by the external electric fields. 2) While, for the applications of the highpower and high-energy Raman lasers, nitrate, tungstate, carbonate, and molybdate crystals are the representative crystalline Raman materials.…”

“…2) While, for the applications of the highpower and high-energy Raman lasers, nitrate, tungstate, carbonate, and molybdate crystals are the representative crystalline Raman materials. [3][4][5][6] One of the reasons is that these materials have advantages in terms of their favorable thermal and mechanical properties and high concentration of active Raman centers, and importantly, they are compatible with solid-state laser technology. Moreover, they possess molecular groups with strong covalent bonding, which is favored for SRS.…”