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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Grover Swartzlander
  • Vol. 31, Iss. 7 — Jul. 1, 2014
  • pp: 1415–1421

Crystal growth, optical spectroscopy, and continuous-wave laser operation of co-doped (Ho,Tm):KLu(WO4)2 monoclinic crystals

Venkatesan Jambunathan, Andreas Schmidt, Xavier Mateos, Maria Cinta Pujol, Uwe Griebner, Valentin Petrov, Carlos Zaldo, Magdalena Aguiló, and Francesc Díaz  »View Author Affiliations

JOSA B, Vol. 31, Issue 7, pp. 1415-1421 (2014)

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We report on the crystal growth, optical spectroscopy, and room-temperature continuous-wave laser generation around 2 μm with co-doped (Ho,Tm):KLu(WO4)2 monoclinic crystals. Co-doped crystals at different doping levels were grown by the top-seeded solution growth slow-cooling method. We characterized the spectroscopy of Ho and Tm ions in KLuW in terms of polarized optical absorption, photoluminescence, and lifetime measurements. Continuous-wave laser operation at room-temperature at a wavelength of 2.06 μm was achieved with several crystals at different co-doping levels, establishing that the optimum doping ratio is 5.29×1019at./cm3 for Ho and 3.10×1020at./cm3 for Tm (0.5 at. %Ho, 5.0 at. %Tm:KLuW), reaching a maximum output power of 145 mW and a slope efficiency of 12.9%.

© 2014 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
(250.5230) Optoelectronics : Photoluminescence
(300.0300) Spectroscopy : Spectroscopy
(300.1030) Spectroscopy : Absorption

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 25, 2014
Revised Manuscript: April 25, 2014
Manuscript Accepted: April 25, 2014
Published: June 4, 2014

Venkatesan Jambunathan, Andreas Schmidt, Xavier Mateos, Maria Cinta Pujol, Uwe Griebner, Valentin Petrov, Carlos Zaldo, Magdalena Aguiló, and Francesc Díaz, "Crystal growth, optical spectroscopy, and continuous-wave laser operation of co-doped (Ho,Tm):KLu(WO4)2 monoclinic crystals," J. Opt. Soc. Am. B 31, 1415-1421 (2014)

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