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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 9 — May. 1, 2013
  • pp: 1458–1460

Low-threshold whispering-gallery-mode microlasers fabricated in a Nd:glass substrate by three-dimensional femtosecond laser micromachining

Jintian Lin, Yingxin Xu, Jiangxin Song, Bin Zeng, Fei He, Huailiang Xu, Koji Sugioka, Wei Fang, and Ya Cheng  »View Author Affiliations


Optics Letters, Vol. 38, Issue 9, pp. 1458-1460 (2013)
http://dx.doi.org/10.1364/OL.38.001458


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Abstract

We report on fabrication of whispering-gallery-mode microlasers in a Nd:glass chip by femtosecond laser three-dimensional micromachining. The main fabrication procedures include the fabrication of freestanding microdisks supported by thin pillars by femtosecond laser ablation of the glass substrate immersed in water, followed by CO2 laser annealing for surface smoothing. The quality (Q) factor of the fabricated microcavity is measured to be 1.065×106. Lasing is observed at a pump threshold as low as 69μW at room temperature with a continuous-wave laser diode operating at 780 nm. This technique allows for fabrication of microcavities of high Q factors in various dielectric materials, such as glasses and crystals.

© 2013 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.2750) Materials : Glass and other amorphous materials

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 4, 2013
Revised Manuscript: March 27, 2013
Manuscript Accepted: April 1, 2013
Published: April 25, 2013

Citation
Jintian Lin, Yingxin Xu, Jiangxin Song, Bin Zeng, Fei He, Huailiang Xu, Koji Sugioka, Wei Fang, and Ya Cheng, "Low-threshold whispering-gallery-mode microlasers fabricated in a Nd:glass substrate by three-dimensional femtosecond laser micromachining," Opt. Lett. 38, 1458-1460 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-9-1458


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