Diode-pumped cw Nd:YAG three-level laser at 869 nm

Abstract

We report for the first time (to our knowledge) a diode-pumped Nd:YAG laser emitting at 869 nm based on the (4)F(3/2)-(4)I(9/2) transition, generally used for a 946 nm emission. Power of 453 mW at 869 nm has been achieved in cw operation with a fiber-coupled laser diode emitting 35.4 W at 809 nm. Intracavity second-harmonic generation in the cw mode has also been demonstrated with power of 118 mW at 435 nm by using a BiB(3)O(6) nonlinear crystal. In our experiment, we used a LiNbO(3) crystal lens to complement the thermal lens of the laser rod, and we obtained good beam quality and high output power stability.

Low‐wavelength emission of Nd‐doped lasers

“…With a higher pump power (40 W), Lü et al [46] demonstrated a laser emitting 453 mW at 869 nm. Key points for this experiment are the coating of the output mirror, the pump power and also a control of the cavity mode through a lithium niobate adjustable lens.…”

Nd:LuVO4 as a true three-level laser

“…The lower wavelengths ever reported with diode-pumped solid-state (DPSS) lasers based on Nd 3+ ions are 899 nm with Nd:YAG [28]. Recently, the pure three-level laser reported based on Nd 3+ ions, for example, 880 nm [29] with Nd:YVO 4 , 879 nm [30] with Nd:GdVO 4 , and 869 nm [31] with Nd:YAG. To the best of our knowledge, there have In this letter, we report on a pure three-level Nd:LuVO 4 laser at 880 nm by a laser diode for what we believe to be the first time.…”

Diode-pumped continuous-wave eye-safe Nd:YAP laser at 1.43μm

“…Compact diode-pumped neodymium-doped crystal lasers operating in the infrared [1][2][3] and visible spectral regions have wide applications in the fields of industry, defense, medical treatment, and scientific research [4][5][6][7][8]. The laser crystal is one of the most important components of a diode-pumped solid-state laser.…”