Highly Efficient Nd:Y₃Al₅O₁₂ Ceramic Laser

Abstract

A highly efficient laser diode end-pumped polycrystalline 1% Nd:Y3Al5O12 (Nd:YAG) ceramic laser has been developed. It is comparable to a Nd:YAG single crystal laser in terms of efficiency. With 883 mW pumping, CW laser output of 499 mW at 1064 nm has been obtained, which corresponds to an optical-to-optical efficiency of 56.5%. The threshold is only 22 mW for a R=97% output coupler. Passively Q-switched operation has also been demonstrated using a Cr4+:YAG single crystal as a saturable absorber.

Multilayer YAG/Re:YAG/YAG laser ceramic prepared by tape casting and vacuum sintering method

“…9(b)], which can be attributed to the transition from 4 I 9/2 to 4 F 5/2 . This wavelength is commonly used as pumping wavelength to generate 1064 nm laser output, [19][20][21][22] corresponding to the excited radiation from 4 F 3/2 to 4 I 11/2 . Moreover, for both composite ceramics, it was found that the transmittance can be increased by annealing treatment, due to the elimination of defects and lattice stress.…”

Comparative study the effect of Yb concentrations on laser characteristics of Yb:YAG ceramics and crystals

“…Transparent laser ceramics [6,[13][14][15][16] fabricated by the vacuum sintering technique and nanocrystalline technology [17] have been proven to be potential replacements for counterpart single crystals because they have several remarkable advantages compared with single-crystal laser materials, such as high concentration and easy fabrication of large-size ceramics samples, multilayer and multifunctional ceramics laser materials [18,19]. Rare earths ions doped Lu 2 O 3 , Sc 2 O 3 , and Y 2 O 3 oxides ceramics have been developed and their mechanical and optical properties are reported recently [20][21][22][23].…”

A New Y3Al5O12 Phase Produced by Liquid‐Feed Flame Spray Pyrolysis (LF‐FSP)

“…The recent advent of transparent polycrystalline YAG lasers that outperform single-crystal YAG lasers has intensified interest in the development of very fine YAG particles that are easily sintered to full density and transparency. [11,12] We report here efforts to produce nanosized Y 3 Al 5 O 12 powders for this purpose that result in a new phase with higher densities than YAG and sinter to full density at relatively low temperatures. We recently described a new method of producing large quantities of single and mixed-metal oxide nanopowders with exceptional control of composition based on liquid-feed flame spray pyrolysis.…”