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 laser annealing for surface smoothing. The quality () factor of the fabricated microcavity is measured to be . Lasing is observed at a pump threshold as low as at room temperature with a continuous-wave laser diode operating at 780 nm. This technique allows for fabrication of microcavities of high factors in various dielectric materials, such as glasses and crystals.
© 2013 Optical Society of AmericaFull Article | PDF Article
Y.-R. Nowicki-Bringuier, J. Claudon, C. Böckler, S. Reitzenstein, M. Kamp, A. Morand, A. Forchel, and J. M. Gérard
Opt. Express 15(25) 17291-17304 (2007)
Eric P. Ostby and Kerry J. Vahala
Opt. Lett. 34(8) 1153-1155 (2009)
Pengfei Wang, Timothy Lee, Ming Ding, Anirban Dhar, Thomas Hawkins, Paul Foy, Yuliya Semenova, Qiang Wu, Jayanta Sahu, Gerald Farrell, John Ballato, and Gilberto Brambilla
Opt. Lett. 37(4) 728-730 (2012)