YVO₄ cascaded Raman laser for five-visible-wavelength switchable emission

Abstract

We report switchable emission of visible light at five wavelengths generated in a YVO 4 cascaded Raman cavity driven by an acousto-optic Q -switched Nd:YAP laser at 1080 nm. The second-harmonic generation and sum-frequency generation of the fundamental, first-Stokes, and second-Stokes waves were realized based on the angle-tuned BBO crystal. The phase-match angle tuning span of a BBO crystal is only approximately 2.3° to allow the frequency mixing to produce five visible wavelengths on demand. At an absorbed pump power of 5.96 W and a pulse repetition frequency of 10 kHz, average output powers of 800, 340, 460, 190, and 326 mW were obtained for 539.9, 567.2, 597.4, 631.0, and 668.5 nm lasers, respectively. The results show that the cascaded Raman laser system with an angle-tuned BBO crystal can provide a convenient and efficient method to achieve wavelength-switchable visible emission for multi-wavelength laser applications.

High Stability Industrial-Grade Nd: YVO4 Picosecond Laser Amplifier With High Average Output Power

“…We believe that the results demonstrated in this work are of great significance for the future realization of practical and industrially-applied, high power, high repetition rate, high beam quality and stable picosecond pulsed laser sources. Furthermore, the moderate single pulse energy (~μJ) of this system also makes it an ideal source for applications in nonlinear optics, such as second-order nonlinear frequency conversion [25,26], and high-power crystalline-based wavelength convertors using the stimulated Raman/Brillouin scattering process [27][28][29][30][31].…”

Recent Progress in Nonlinear Frequency Conversion of Optical Vortex Lasers

“…The jointing of self-Raman effects and an LBO crystal, along with the defect spot mirror cavity design, has enabled the multi-wavelength operation. If the wavelength selection mechanism based on vanadate crystals be introduced [127,128], it will put forward the application of a selective multi-wavelength vortex laser. It is natural to include our future work in the areas of vortex Raman operation, particularly to introduce vortex characteristics into the visible band laser.…”

Diode-pumped, actively Q-switched Nd,La:CaNb2O6 self-Raman laser at 1,174 nm

“…As an efficient wavelength conversion technology, stimulated Raman scattering has received extensive attention in recent years. Many solid-state materials have been found as promising Raman gain media for all-solid-state Raman laser design [1][2][3][4][5][6][7][8]. A class of Raman crystals that can be used as excellent laser crystals by doping active ions have been widely concerned, such as vanadate [9][10][11] and tungstate crystals [12][13][14][15].…”