Highly efficient 2% Nd:yttrium aluminum garnet ceramic laser

Lu, Jianren; Prabhu, Mahendra; Xu, Jianqiu; Ueda, Ken–ichi; Yagi, Hideki; Yanagitani, T.; Kaminskii, Alexander A.

doi:10.1063/1.1331091

Cited by 205 publications

(93 citation statements)

References 5 publications

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“…8 Recently, authors reported on the fabrication of near surface channel waveguides in Nd:YAG ceramics.…”

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confidence: 99%

“…7 As a matter of fact, the laser performance of Nd:YAG ceramics has been found to be equal or even superior to that corresponding to Nd:YAG crystals. 8 Recently, authors reported on the fabrication of near surface channel waveguides in Nd:YAG ceramics. 9 Nevertheless, up to date no attempt has been made, to the best of our knowledge, for the fabrication of buried channel waveguides in Nd:YAG ceramics by femtosecond DLW.…”

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confidence: 99%

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Highly efficient laser action in femtosecond-written Nd:yttrium aluminum garnet ceramic waveguides

Torchia

Ródenas

Benayas

et al. 2008

Applied Physics Letters

157

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We report continuous wave 1.06 m laser operation in an optical waveguide fabricated in a Nd:YAG ceramic by femtosecond laser writing. Single mode and stable laser oscillation have been achieved by using the natural Fresnel reflection for optical feedback. Output laser power in excess of 80 mW and a laser slope efficiency of 60% have been demonstrated. © 2008 American Institute of Physics. ͓DOI: 10.1063/1.2890073͔Femtosecond direct laser writing ͑DLW͒ of transparent materials is attracting much attention because of the unique possibility of three-dimensionally modifying, at the micrometric and submicrometric scale, the optical properties of the irradiated media. This technique has been already proved to be a powerful and flexible tool for the fabrication of a great variety of optoelectronic components such as photonic crystals, diffraction gratings, and optical memories.1-3 When femtosecond pulses are focused inside a dielectric material, a permanent change in the refractive index is produced, in such a way that optical waveguides could be generated. This possibility has been already demonstrated in a great variety of glasses and crystals. [4][5][6] The further use of the DLW technique for the fabrication of low-loss channel waveguides in laser materials could be highly advantageous with respect to other fabrication approaches, and could also lead to technology breakthroughs in the development of threedimensionally integrated optical circuits.Among the different solid state laser media, neodymium doped yttrium aluminum garnet ͑YAG͒ transparent ceramics are nowadays attracting a great interest because of its advantages over the traditionally used Nd:YAG crystals. These advantages are the lower manufacturing costs, the possibility of high neodymium contents without any decrease in the optical quality of the gain medium, and also the possibility of direct composite fabrication.7 As a matter of fact, the laser performance of Nd:YAG ceramics has been found to be equal or even superior to that corresponding to Nd:YAG crystals. 8 Recently, authors reported on the fabrication of near surface channel waveguides in Nd:YAG ceramics.9 Nevertheless, up to date no attempt has been made, to the best of our knowledge, for the fabrication of buried channel waveguides in Nd:YAG ceramics by femtosecond DLW. The possible application of such waveguides as reliable and integrated laser sources is, therefore, still unexplored.In this letter, we report on the fabrication of buried channel waveguide lasers in Nd:YAG ceramics by using a two line confinement approach. Light confinement has been achieved between two parallel tracks due to filamentation of the femtosecond laser pulses. The possible influence of the waveguide fabrication process on the spectroscopic properties of the neodymium ions has been investigated by timeresolved confocal microscopy. We have also demonstrated highly efficient and stable laser oscillation based on the femtosecond written waveguide.The Nd:YAG ceramic sample used in this work was provided by Baikowski Ltd....

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“…8 Recently, authors reported on the fabrication of near surface channel waveguides in Nd:YAG ceramics.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Highly efficient laser action in femtosecond-written Nd:yttrium aluminum garnet ceramic waveguides

Torchia

Ródenas

Benayas

et al. 2008

Applied Physics Letters

157

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“…Systematic studies of Nd:YAG ceramic lasers for different doping levels showed that if we dope Nd 3+ -ions highly, it is difficult to keep the large grain size and the number of grain boundaries will increase within the same path length accordingly (Ikesue et al, 1995 a, b;Shoji et al, 2000;Lu et al, 2000). In this section, our experimental results concerning lasing pattern formations due to grain boundaries and the resultant dynamic instabilities observed in Nd:YAG ceramic lasers (Kawai et al, 2004;Narita et al, 2005;Otsuka et al, 2006) are reviewed.…”

Section: Formation Of Local Transverse Modes and Associated Dynamic Ementioning

confidence: 99%

Polarization Properties of Laser-Diode-Pumped Microchip Nd:YAG Ceramic Lasers

Otsuka

Nemoto

Kamikariya

et al. 2010

Frontiers in Guided Wave Optics and Optoelectronics

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“…Over the years several efficient CW laser diode (LD) pumped lasers (e.g. see [10] [12,13]. Since the sintering temperature is about 600 °C lower than the polymorphic transition temperature, it is easier to fabricate large-size Y 2 O 3 :Ln 3+ ceramics.…”

Section: Introductionmentioning

confidence: 99%

Non‐equilibrium acoustic phonons in nanocrystalline ceramics based on C‐modification of Y₂O₃ sesquioxide

Иванов

Barabanenkov

Таранов

et al. 2005

Physica Status Solidi (b)

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Highly efficient 2% Nd:yttrium aluminum garnet ceramic laser

Cited by 205 publications

References 5 publications

Highly efficient laser action in femtosecond-written Nd:yttrium aluminum garnet ceramic waveguides

Highly efficient laser action in femtosecond-written Nd:yttrium aluminum garnet ceramic waveguides

Polarization Properties of Laser-Diode-Pumped Microchip Nd:YAG Ceramic Lasers

Non‐equilibrium acoustic phonons in nanocrystalline ceramics based on C‐modification of Y₂O₃ sesquioxide

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Highly efficient 2% Nd:yttrium aluminum garnet ceramic laser

Cited by 205 publications

References 5 publications

Highly efficient laser action in femtosecond-written Nd:yttrium aluminum garnet ceramic waveguides

Highly efficient laser action in femtosecond-written Nd:yttrium aluminum garnet ceramic waveguides

Polarization Properties of Laser-Diode-Pumped Microchip Nd:YAG Ceramic Lasers

Non‐equilibrium acoustic phonons in nanocrystalline ceramics based on C‐modification of Y2O3 sesquioxide

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Non‐equilibrium acoustic phonons in nanocrystalline ceramics based on C‐modification of Y₂O₃ sesquioxide