Efficient CW laser at 559 nm by intracavity sum-frequency mixing in a self-Raman Nd:YVO4 laser under direct 880 nm diode laser pumping

Abstract

We report an efficient continuous wave (CW) laser emission at 559 nm by sum-frequency mixing of the fundamental and first-Stokes fields generated within an Nd:YVO4 self-Raman laser. Intracavity sum-frequency mixing with LiB3O5 (LBO) nonlinear crystal yielded 890 mW of visible yellow-green emission, corresponding to an optical conversion efficiency of 4.9% with respect to the incident pump power; the output power stability over 4 h is better than 5.7%. The laser beam quality M2 factors are 3.65 and 4.13 in both horizontal and vertical dimensions respectively.

Kilohertz high power extracavity KGW yellow raman lasers based on pulse LD side-pumped ceramic Nd: YAG

“…To achieve required yellow sources, a variety of approaches have been explored in recent years. These include intracavity sum frequency mix ing in a self Raman crystal [8][9][10], intracavity sum frequency mixing with intracavity Raman shifted [11,12], intracavity frequency doubling with intracavity Raman shifted [13,14] and external Raman shifted by frequency doubling green laser pumped [15,16]. However, many types of Raman resonator, whose inelastic Raman scattering is caused by the thermal lens effect, does not influence the stability of the pump laser cavity, similarly, thermal lens effect of laser gain media will not affect the stability of the Raman reso nator.…”

Study of Yb:YVO4 lasers end-pumped by a 985-nm diode laser

“…Recently, microchip lasers of Tm, Ho:YVO 4 crys tal oscillating around 2 μm were successfully demon strated at room temperature [13,14]. 1 The article is published in the original.…”

“…Continuous wave (CW) vis ible coherent radiation at 559 and 440 nm were dem onstrated very recently through intracavity nonlinear optical interactions in a self Raman and a quasi three level Nd:YVO 4 laser [1,2]; high power single frequency laser oscillation was achieved with either Nd:YVO 4 or composite Nd:YVO 4 /YVO 4 crystal in a ring resonator [3,4]; various passively Q switched Nd:YVO 4 lasers were developed by employing differ ent saturable absorbers like Cr 4+ :YAG, GaAs, and car bon nanotube material [5][6][7]; efficient passively mode locked laser operation was also realized with Nd:YVO 4 crystal by use of the SESAM technique [8,9]. Besides the use of host for the Nd ion, the crystal of YVO 4 also proves to be effective laser medium when doped with Er, or with Tm and Ho.…”

A passively mode-locked Nd:YVO4 laser with a carbon nanotube saturable absorber

“…The neodymium doped vanadate Nd:YVO 4 crys tal, due to its high absorption coefficient for diode pumping and large stimulated emission cross section which are most suited for achieving continuous wave [13,14], Q swiching [15,16], and mode locking [17⎯20].…”