Dual-mode temperature compensation technique for laser stabilization to a crystalline whispering gallery mode resonator

Frequency stabilization of a diode laser locked to a whispering gallery mode (WGM) reference resonator made of a MgF2 single crystal is demonstrated. The strong thermal dependence of the difference frequency between two orthogonally polarized TE an TM modes (dual-mode frequency) of the optically anisotropic crystal material allows sensitive measurement of the resonator's temperature within the optical mode volume. This dual-mode signal was used as feedback for self-referenced temperature stabilization to nanokelvin precision, resulting in frequency stability of 0.3 MHz/h at 972 nm, which was measured by comparing with an independent ultrastable laser. (C) 2012 Optical Society of America


Published in:
Optics Express, 20, 17, 19185-19193
Year:
2012
Publisher:
Washington, Optical Society of America
ISSN:
1094-4087
Laboratories:




 Record created 2013-02-27, last modified 2018-01-28


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