72 W Nd:Y3Al5O12 ceramic laser

Abstract

A high-power continuous-wave polycrystalline 1% Nd:Y3Al5O12 (Nd:YAG) ceramic rod laser was demonstrated. With 290 W/808 nm laser diode pumping, cw laser output of 72 W was obtained at 1064 nm. The optical-to-optical conversion efficiency is 24.8%. Thermally induced birefringence properties of Nd:YAG ceramic was also investigated.

Laser crystals and ceramics: recent advances

“…Thus far, generation has been achieved at 16 4f 12 -4f 12 intermanifold transitions in numerous fluoride and oxide crystals and spans the spectral range from 0.469 to ∼ 4.75 µm (Table 10 and Fig. 8).…”

“…13. A new generation of laser crystalline ceramics was fabricated by the recently developed revolutionary VSN method without a high-pressure process, where the raw materials were prepared by nanocrys- [10,12,546,727]. Aqueous solutions of Al, Y, and Ln chlorides are added dropwise and then mixed with an aqueous solution of ammonium hydrogen carbonate or urea (NH 4 HCO 3 , NH 4 SO 4 ).…”

“…The first laser 4f 12 -4f 12 intermanifold transition of Tm 3+ ions was the 3 H 4 → 3 H 6 channel (CaWO 4 :Tm 3+ [186]). …”

“…At present, this branch of the research and development of LDpumped crystalline lasers continues to grow very fast (see, e.g. [7][8][9] [10]), makes it possible to obtain these laser ceramics with any required size and activator ion concentration, which correspondingly has allowed the achievement of multi-kilowatt levels of continuous wave (CW) Y 3 Al 5 O 12 :Nd 3+ laser output power with LD pumping at the one-micron lasing channel ( 4 F 3/2 → 4 I 11/2 ) during the last several years [12,13]. The extremely active interest in the study of nonlinear optical cascaded effects in χ (3) -and (χ (2) + χ (3) )-active crystalline materials can be accounted for by a number of practical reasons.…”

Tailored Ceramics for Laser Applications

“…The solution was aged until the pH stabilized between 7.5 to 11, and then filtered, washed, dried and ball milled for 24 h, before being pressed and sintered as before. Lu et al [100,103] A ten-fold increase in the width of the Nd spectral line allows 10 ps pulses to be produced [106]. Nd:YSAG can be made transparent using the mixed oxide synthesis discussed above for YAG [107].…”