Temperature dependence of the fractional thermal load of Nd:YVO_4 at 1064 nm lasing and its influence on laser performance

Abstract

Temperature dependence of thermal effect for neodymium doped yttrium orthovanadate crystal is quantified by measuring its dioptric power. With the boundary temperature range from 293 K to 353 K, the increase of fractional thermal load (lasing at 1064 nm, pumping at 888 nm) is from 16.9% to 24.9% with lasing, which is attributed to the rise of upconversion parameter and thermal conductivity. The influence of the boundary temperature on the output characteristic of a high-power single frequency laser is also investigated. The maximum output power decreases from 25.3 W to 13.5 W with the increase of boundary temperature from 293 K to 353 K. Analysis results indicate that further power scaling can be achieved by controlling the Nd:YVO(4) temperature to a lower.

Determination of blue-light-induced infrared absorption based on mode-matching efficiency in an optical parametric oscillator

“…The laser source is a home-made CW Ti:sapphire laser with a maximum output power of 1.27 W 18 , and can be finely tuned around the wavelength of 795 nm corresponding to the transition of 87 Rb D1 line. A CW single frequency 532 nm laser is used as the pump source with the maximum output power of 18 W 19 20 . A part of the 795 nm laser is injected into a four-mirror enhanced-external-cavity for CW second harmonic generation (SHG), which is used as a laser source for the absorption measurement of 397.5 nm laser and the detailed SHG progress can be found in ref.…”

Watt-Level Continuous-Wave Mode-Locked Nd:YVO4 Laser With ReSe2 Saturable Absorber

“…In our experiment, the laser operated at the wavelength of 1066.5 nm for σ-polarization when the Nd:YVO4 crystal used in our laser was cut by a-axis. The ReSe2 mode-locked Nd:YVO4 laser at 1066.5 nm basically operates as a typical four-level laser system which is favorable to achieve watt-level high power output without inducing reabsorption losses [45]. At 1.1 W of output power, the laser beam quality was measured as shown in the inset of Fig.…”

“…The coupling efficiency of lens group is over 90%. The a-cut YVO4/Nd:YVO4 composite crystal (Nd 3+ ~ 0.3 at %) was employed as the gain medium, with minimizing the possible thermal lensing effects [45,46]. The cross section of laser crystal is 3 mm ×3 mm.…”

Development of Single-Longitudinal-Mode Selection Technology for Solid-State Lasers

“…e experimental setup is shown in Figure 7. In 2013, Wang et al [46] developed a 25.3 W intracavity frequency doubling singlefrequency green laser in a four-mirror ring cavity, combined with controlling the boundary temperature.…”