Diode-Pumped Actively Q-Switched Nd:YVO4/RTP Intracavity Raman Laser at 1.49 µm

Abstract

For the first time, a diode-pumped actively Q-switched Nd:YVO4/RbTiOPO4 (RTP) intracavity Raman laser at 1.49 µm was demonstrated to the best of our knowledge. Experimentally, a dual-end diffusion-bonded YVO4–Nd:YVO4–YVO4 crystal was employed as the laser medium to generate 1.34 µm laser radiation, and an RTP crystal as the Raman medium to enable the frequency conversion, by which radiation at 1.49 µm was achieved successfully. With an incident pump power of 10.4 W, an average output power of 502 mW was obtained at a pulse repetition rate of 15 kHz, corresponding to a conversion efficiency of 4.8%.

Self‐Frequency‐Mixing Raman Laser Based on RbTiOPO4

“…[10][11][12][13][14][15] RbTiOPO 4 (RTP), in addition to having a high Raman gain coefficient, also has a very high second order nonlinear optical coefficient and as such, has been used as a crystal for SFM, SRS, and stimulated polariton scattering, with each effect nonlinear process being used in isolation. [16,17] However, to the best of our knowledge, there have been no reports of the use of RTP as a combined SRS and SFG crystal (similar to what has been demonstrated using its isomorph KTiOAsO 4 (KTA)), [18][19][20] and this forms the focus of our work.…”

Growth, Structure, and Spectroscopic Properties of a Disordered Nd:SrLaGaO4 Laser Crystal

“…For a 1.0 µm wavelength laser, Nd 3+ -doped laser crystals exhibit high pump efficiency and a low threshold due to the long upper\-level lifetime, large emission cross section, and no reabsorption loss of Nd 3+ ions [8][9][10][11][12][13]. In recent years, many novel Nd 3+ -doped crystals have been reported to realize ultrashort or Q-switched pulsed lasers, such as Nd:GdSr 3 (PO 4 ) 3 [5], Nd:LaMgAl 11 O 19 [6], Nd:LuYPO 4 [8], Nd:Ca(Y, Gd)AlO 4 [9], and Nd:GdScO 3 [14].…”