期刊
OPTICS EXPRESS
卷 20, 期 17, 页码 19185-19193出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.019185
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资金
- European Social Fund
- EU
- Marie Curie IAPP
- Swiss National Science Foundation
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
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