TY - JOUR
T1 - Observation of photothermal feedback in a stable dual-carrier optical spring
AU - Kelley, David
AU - Lough, James
AU - Mangaña-Sandoval, Fabian
AU - Perreca, Antonio
AU - Ballmer, Stefan W.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/9/24
Y1 - 2015/9/24
N2 - We report on the observation of photothermal feedback in a stable dual-carrier optical spring. The optical spring is realized in a 7 cm Fabry-Perot cavity comprised of a suspended 0.4 g small end mirror and a heavy input coupler, illuminated by two optical fields. The frequency, damping, and stability of the optical spring resonance can be tuned by adjusting the power and detuning of the two optical fields, allowing for a precise measurement of the absorption-induced photothermal feedback. The magnitude and frequency dependence of the observed photothermal effect are consistent with predicted corrections due to transverse thermal diffusion and coating structure. While the observed photothermal feedback tends to destabilize the optical spring, we also propose a small coating modification that would change the sign of the effect, making a single-carrier stable optical spring possible.
AB - We report on the observation of photothermal feedback in a stable dual-carrier optical spring. The optical spring is realized in a 7 cm Fabry-Perot cavity comprised of a suspended 0.4 g small end mirror and a heavy input coupler, illuminated by two optical fields. The frequency, damping, and stability of the optical spring resonance can be tuned by adjusting the power and detuning of the two optical fields, allowing for a precise measurement of the absorption-induced photothermal feedback. The magnitude and frequency dependence of the observed photothermal effect are consistent with predicted corrections due to transverse thermal diffusion and coating structure. While the observed photothermal feedback tends to destabilize the optical spring, we also propose a small coating modification that would change the sign of the effect, making a single-carrier stable optical spring possible.
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U2 - 10.1103/PhysRevD.92.062003
DO - 10.1103/PhysRevD.92.062003
M3 - Article
AN - SCOPUS:84943596627
SN - 1550-7998
VL - 92
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 6
M1 - 062003
ER -