Locking Multi-Laser Frequencies to a Precision Wavelength Meter: Application to Cold Atoms
Creators
- 1. Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
- 2. Pohang University of ScDepartment of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Koreaience and Technology (POSTECH)
- 3. Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea, Department of Physics, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea
- 4. Kyungbock High School, 28 Jahamun-ro 9-gil, Jongno-gu, Seoul 03049, Korea
- 5. Department of Bioengineering, Korea University, Seoul 02841, Korea, Interdisciplinary Program in Precision Public Health, Korea University, Seoul 02841, Korea
- 6. Department of Physics & Institute of Applied Physics, Seoul National University, Seoul 08826, Korea
Description
We herein report a simultaneous frequency stabilization of two 780-nm external cavity diode lasers using a precision wavelength meter (WLM). The laser lock performance is characterized by the Allan deviation measurement in which we find $\sigma_{y}=10^{-12}$ at an averaging time of 1000~s. We also obtain spectral profiles through a heterodyne spectroscopy, identifying the contribution of white and flicker noises to the laser linewidth. The frequency drift of the WLM is measured to be about 2.0(4)~MHz over 36~h. Utilizing the two lasers as a cooling and repumping field, we demonstrate a magneto-optical trap of $^{87}$Rb atoms near a high-finesse optical cavity. Our laser stabilization technique operates at broad wavelength range without a radio frequency element.
Files
Fig3(a).csv
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