Affordable medium-finesse optical cavity for diode laser stabilization

We have constructed and characterized an affordable medium-finesse optical cavity ( F ∼ 1500 ) for the stabilization of tunable diode lasers at two different wavelengths (780, and 960 nm , respectively). Its main element is an ultra-low expansion glass spacer, whose temperature was stabilized using...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2024-04, Vol.130 (4), Article 60
Main Authors: Fernández, David Rodríguez, Torres, Manuel Alejandro Lefrán, Cardoso, Marcos Roberto, Kondo, Jorge Douglas Massayuki, Saffman, Mark, Marcassa, Luis Gustavo
Format: Article
Language:English
Subjects:
Engineering
Laser stability
Lasers
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Resonant frequencies
Semiconductor lasers
Stabilization
Thermoelectric cooling
Vacuum chambers
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Summary:We have constructed and characterized an affordable medium-finesse optical cavity ( F ∼ 1500 ) for the stabilization of tunable diode lasers at two different wavelengths (780, and 960 nm , respectively). Its main element is an ultra-low expansion glass spacer, whose temperature was stabilized using thermoelectric cooler elements inside a vacuum chamber. By combining the dual sideband technique and the classical Pound–Drever–Hall technique, we were able to lock the lasers at any frequency within the cavity free spectral range. The cavity presents a long-term drift of resonant frequency of 1.2 MHz / day , which can be compensated for by temperature variation. Finally, we demonstrate the cavity use in an electromagnetically induced transparency microwave spectrum experiment in a thermal atomic sample.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-024-08190-4