Ultrastable lasers: investigations of crystalline mirrors and closed cycle cooling at 124 K (2404.02647v2)
Abstract: We have investigated crystalline AlGaAs/GaAs optical coatings with three ultra-stable cavities operating at 4 K, 16 K, 124 K and 297 K. The response of the resonance frequencies of cavities to variations in optical power indicates effects beyond the photo-thermo-optic effect observed in dielectric coatings. These effects are strongly dependent on the intensity of the intracavity light at 1.5~\textmu m. When the rear side of the mirrors is illuminated with external light, we observe a prominent photo-modified birefringence for photon energies above the GaAs bandgap, which points to a possible mechanism relating our observations to the semiconductor properties of the coatings. Separately, we also present a low maintenance evolution of our 124 K silicon cavity system where the liquid nitrogen based cooling system is replaced with closed cycle cooling from a pulse-tube cryo-cooler.
- Yu J 2023 Cryogenic silicon Fabry-Perot resonator with Al0.920.92{}_{0.92}start_FLOATSUBSCRIPT 0.92 end_FLOATSUBSCRIPTGa0.080.08{}_{0.08}start_FLOATSUBSCRIPT 0.08 end_FLOATSUBSCRIPTAs/GaAs mirror coatings. Ph.D. thesis QUEST-Leibniz-Forschungsschule der Gottfried Wilhelm Leibniz Universität Hannover
- Levin Y 1998 57 659–663
- Callen H B and Welton T A 1951 83 34–40
- Kubo R 1966 Rep. Prog. Phys. 29 255–284
- Legero T, Kessler T and Sterr U 2010 27 914–919
- Kraus B 2023 A highly stable UV clock laser Ph.D. thesis QUEST-Leibniz-Forschungsschule der Gottfried Wilhelm Leibniz Universität Hannover
- Monemar B, Shih K K and Pettit G D 1976 47 2604–2613
- Sturge M D 1962 127(3) 768–773
- Hutchby J A and Fudurich R L 2008 47 3140–3151
- Namba S 1961 51 76–79
- Hagemann C 2013 Ultra-stable laser based on a cryogenic single-crystal silicon cavity Ph.D. thesis Fakultät für Mathematik und Physik der Gottfried Wilhelm Leibniz Universität Hannover URL http://edok01.tib.uni-hannover.de/edoks/e01dh13/739734164.pdf
Paper Prompts
Sign up for free to create and run prompts on this paper using GPT-5.
Top Community Prompts
Collections
Sign up for free to add this paper to one or more collections.