Details
| Original language | English |
|---|---|
| Pages (from-to) | 464-470 |
| Number of pages | 7 |
| Journal | OPTICA |
| Volume | 10 |
| Issue number | 4 |
| Publication status | Published - 20 Apr 2023 |
| Externally published | Yes |
Abstract
State-of-the-art optical oscillators employing cryogenic reference cavities are limited in performance by the Brownian thermal noise associated with the mechanical dissipation of the mirror coatings.Recently, crystalline Al1-xGaxAs=GaAs coatings have emerged as a promising candidate for improved coating thermal noise.We present measurements of the frequency noise of two fully crystalline cryogenic reference cavities with Al0.92Ga0.08As=GaAs optical coatings. We report on birefringent noise associated with anticorrelated frequency fluctuations between the polarization modes of the crystalline coatings and identify variables that affect its magnitude. Comparing the birefringent noise between the two cryogenic reference cavities reveals a phenomenological set of scalings with intracavity power and mode area. We implement an interrogation scheme that cancels this noise by simultaneous probing of both polarization modes. The residual noise remaining after this cancellation is larger than both cavities' thermal noise limits but still lower than the instabilities previously measured on equivalent resonators with dielectric coatings. Though the source of these noise mechanisms is unclear, we demonstrate that crystalline coatings can provide stability and sensitivity competitive with resonators employing dielectric coatings.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: OPTICA, Vol. 10, No. 4, 20.04.2023, p. 464-470.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Frequency stability of cryogenic silicon cavities with semiconductor crystalline coatings
AU - Kedar, Dhruv
AU - Yu, Jialiang
AU - Oelker, Eric
AU - Staron, Alexander
AU - Milner, William R.
AU - Robinson, John M.
AU - Legero, Thomas
AU - Riehle, Fritz
AU - Sterr, Uwe
AU - Ye, Jun
N1 - Funding information: Funding. National Institute of Standards and Technology; Defense Advanced Research Projects Agency; Air Force Research Laboratory; National Science Foundation (PHY-1734006); European Metrology Programme for Innovation and Research (20FUN08 NEXTLASERS); Deutsche Forschungsgemeinschaft (274200144, 390837967). Acknowledgment. The authors thank T. Brown and A. Ellzey for technical assistance, A. M. Kaufman and V. Schäfer for careful reading of the manuscript, and G. Cole and J. Hall for insightful discussions. Ji. Y, T. L., F. R., and U. S. acknowledge support from Project 20FUN08 NEXTLASERS, which has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 Research and Innovation Programme.
PY - 2023/4/20
Y1 - 2023/4/20
N2 - State-of-the-art optical oscillators employing cryogenic reference cavities are limited in performance by the Brownian thermal noise associated with the mechanical dissipation of the mirror coatings.Recently, crystalline Al1-xGaxAs=GaAs coatings have emerged as a promising candidate for improved coating thermal noise.We present measurements of the frequency noise of two fully crystalline cryogenic reference cavities with Al0.92Ga0.08As=GaAs optical coatings. We report on birefringent noise associated with anticorrelated frequency fluctuations between the polarization modes of the crystalline coatings and identify variables that affect its magnitude. Comparing the birefringent noise between the two cryogenic reference cavities reveals a phenomenological set of scalings with intracavity power and mode area. We implement an interrogation scheme that cancels this noise by simultaneous probing of both polarization modes. The residual noise remaining after this cancellation is larger than both cavities' thermal noise limits but still lower than the instabilities previously measured on equivalent resonators with dielectric coatings. Though the source of these noise mechanisms is unclear, we demonstrate that crystalline coatings can provide stability and sensitivity competitive with resonators employing dielectric coatings.
AB - State-of-the-art optical oscillators employing cryogenic reference cavities are limited in performance by the Brownian thermal noise associated with the mechanical dissipation of the mirror coatings.Recently, crystalline Al1-xGaxAs=GaAs coatings have emerged as a promising candidate for improved coating thermal noise.We present measurements of the frequency noise of two fully crystalline cryogenic reference cavities with Al0.92Ga0.08As=GaAs optical coatings. We report on birefringent noise associated with anticorrelated frequency fluctuations between the polarization modes of the crystalline coatings and identify variables that affect its magnitude. Comparing the birefringent noise between the two cryogenic reference cavities reveals a phenomenological set of scalings with intracavity power and mode area. We implement an interrogation scheme that cancels this noise by simultaneous probing of both polarization modes. The residual noise remaining after this cancellation is larger than both cavities' thermal noise limits but still lower than the instabilities previously measured on equivalent resonators with dielectric coatings. Though the source of these noise mechanisms is unclear, we demonstrate that crystalline coatings can provide stability and sensitivity competitive with resonators employing dielectric coatings.
UR - http://www.scopus.com/inward/record.url?scp=85162813505&partnerID=8YFLogxK
U2 - 10.1364/OPTICA.479462
DO - 10.1364/OPTICA.479462
M3 - Article
AN - SCOPUS:85162813505
VL - 10
SP - 464
EP - 470
JO - OPTICA
JF - OPTICA
SN - 2334-2536
IS - 4
ER -