title: Dual-mode temperature compensation technique for laser stabilization to a crystalline whispering gallery mode resonator.
abstract: Frequency stabilization of a diode laser locked to a whispering gallery mode (WGM) reference resonator made of a MgF2single 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.
authors.affiliation: Max Planck Institute of Quantum Optics, Garching, Germany. iliafes@gmail.com
authors.forename: I
authors.initials: I
authors.lastname: Fescenko
authors.forename: J
authors.initials: J
authors.lastname: Alnis
authors.forename: A
authors.initials: A
authors.lastname: Schliesser
authors.forename: C Y
authors.initials: CY
authors.lastname: Wang
authors.forename: T J
authors.initials: TJ
authors.lastname: Kippenberg
authors.forename: T W
authors.initials: TW
authors.lastname: Hänsch
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D010363:Pattern Recognition, Automated / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013696:Temperature; D013817:Thermography / Q000295:instrumentation*; D014159:Transducers