Multi-wavelength passively Q-switched c -cut Nd:YVO 4 self-Raman laser with Cr 4+ :YAG saturable absorber

Multi-wavelength continuous-wave Nd:YVO4 self-Raman laser under in-band pumping*

“…Obviously, the Stokes wavelength at 1168.4 nm and 1178.7 nm come respectively from the first Stokes shift of 816 cm −1 and 890 cm −1 for the 1066.7-nm fundamental laser. According to the spontaneous Raman spectrum of c-cut Nd:YVO 4 crystal, [11,12,23] for σ -polarized pump, the Raman gain coefficients for three main Raman shifts at 890, 816, and 259 cm −1 are estimated at 4.5, 2.6, and 2.3 cm/GW, respectively. To our knowledge, the oscillation threshold of Raman laser is inversely proportional to Raman gain, thus the oscillation threshold of 1178.7 nm should be lower than that of 1168.4 nm, which is not in agreement with the experimental result.…”

“…have been employed as the laser gain media for dual-or multi-wavelength fundamental laser generation. [4][5][6][7][8][9] In addition, stimulated Raman scattering (SRS) in the solid-state crystals have recently been used to generate multi-wavelength emission in both pulsed (Qswitched) [10][11][12][13] and continuous-wave (CW) regimes. [14][15][16][17][18][19] Compared with fundamental lasers, Raman lasers have the advantages of high beam quality, short pulse duration, and pure spectrum.…”

Dual-wavelength CW a-cut Nd:YVO4 laser at 1064.3 and 1066.7 nm

“…In our previous work, we achieved a triple-wavelength Nd:YVO4 self-Raman laser at 1097.9, 1130.1 and 1163,6 nm [3]. In this paper, we obtain simultaneously a dual-wavelength CW a-cut Nd:YVO4 laser at 1064.3 and 1066.7 nm.…”

“…Multi-wavelength all-solid-state lasers have exhibited versatile applications in laser radar, holographic interferometer, laser spectroscopy, environmental monitoring, remote sensing, and terahertz (THz) radiation generating, etc [1][2][3][4]. Nd 3+ -doped gain materials, such as Nd:GYSGG, Nd:GdVO4, Nd:YAG, Nd:YLF and Nd:YVO4, are widely used in such lasers due to their high gain, broad absorption band, and good mechanical properties [5][6][7][8].…”

Stimulated Raman Scattering in Pb(MoO4)1−x(WO4)x with x = 0, 0.5, 0.8 and 1.0 with Combined Frequency Shifts on High- and Low-Frequency Raman Modes under Synchronous Picosecond Laser Pumping

“…This Raman mode corresponds to totally symmetric stretching vibration of the (MoO 4 ) 2− or (WO 4 ) 2− tetrahedron anionic groups with the frequency of ν 1 = 870 or 905 cm −1 , respectively [11]. Using high-Q optical cavity for the Raman-active crystal can help to obtain SRS conversion in crystals not only on the most intense ν 1 Raman mode but also on lower intense Raman modes [12][13][14][15]. It is also necessary to note that in scheelite-type crystals the anionic group bending vibration ν 2 is a coherent combination of two twisting (A g + B g ) and one scissoring Raman mode having a one-mode behavior.…”