Chinese Physics Letters

Frequency-Shift of a Frequency Stabilized Laser Based on Zeeman Effect

魏荣, 邓见辽, 钱勇, 张瑜, 张育竹

Published Jan 1, 2003• 0 citations

Abstract

We introduce a new method of frequency-shifting for a diode laser in laser cooling experiments, the method is based on the Zeeman effect of Rb-87 atoms. The laser frequency is stabilized by absorption spectrum line of atoms in magnetic field. We show that a magnetic field can be added Up to 10(-2) T. The corresponding frequency shift is 10(2)MHz and the response time is about 1 ms. The large range of the frequency shift is sufficient for laser-cooling experiments.

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We introduce a new method of frequency-shifting for a diode laser in laser cooling experiments, the method is based on the Zeeman effect of 87 Rb atoms. The laser frequency is stabilized by absorption spectrum line of atoms in magnetic field. We show that a magnetic field can be added up to 10 -2 T. The corresponding frequency shift is 10 2 MHz and the response time is about 1 ms. The large range of the frequency shift is sufficient for laser-cooling experiments.

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[Frequency stabilization of diode laser using zeeman spectra].

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Chinese Physics Letters

Frequency-Shift of a Frequency Stabilized Laser Based on Zeeman Effect

魏荣, 邓见辽, 钱勇, 张瑜, 张育竹

Published Jan 1, 2003• 0 citations

OpenAlex

Abstract

Related papers

Frequency-Shift of a Frequency Stabilized Laser Based on Zeeman Effect

Wei Rong, Jianliao Deng, Qian Yong +2 more

Chinese Physics LettersSep 24, 20035 citations

Frequency stabilization of a diode laser using the Zeeman shift of saturated absorption spectra of the /sup 87/Rb atom

Ho Seong Lee, Sang Eon Park, Sung Hoon Yang

Conference on Precision Electromagnetic MeasurementsDec 17, 20020 citations

[Frequency stabilization of diode laser using zeeman spectra].

Kaijun Jiang, J. Wang, Ke Li +3 more

Zeeman split takes place for the hyperfine level structure of neutral atoms where magnetic field exists. In addition, being excited by right circularly polarized light and left circularly polarized light, atoms obey different transition rules. So, the absorption peak between the hyperfine Zeeman level shifts with respect to the absorption peak without magnetic field. Accordingly, the authors demonstrated a kind of simple and flexible method to stabilize the frequency of diode laser. The linewidth of diode laser was reduced to less than 1 MHz using this method. Through analyzing the experiment results, the authors found that when the sum of both shifts of the hyperfine level of atoms excited by right circularly polarized light and left circularly polarized light was equal to the FWHM (Full Width at Half Maximum) of the saturated absorption peak, the laser frequency was stabilized best.Zeeman split takes place for the hyperfine level structure of neutral atoms where magnetic field exists. In addition, being excited by right circularly polarized light and left circularly polarized light, atoms obey different transition rules. So, the absorption peak between the hyperfine Zeeman level shifts with respect to the absorption peak without magnetic field. Accordingly, the authors demonstrated a kind of simple and flexible method to stabilize the frequency of diode laser. The linewidth of diode laser was reduced to less than 1 MHz using this method. Through analyzing the experiment results, the authors found that when the sum of both shifts of the hyperfine level of atoms excited by right circularly polarized light and left circularly polarized light was equal to the FWHM (Full Width at Half Maximum) of the saturated absorption peak, the laser frequency was stabilized best.

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Frequency-stabilized diode laser with the Zeeman shift in an atomic vapor

Kristan L. Corwin, Zheng‐Tian Lu, Carter F. Hand +2 more

We demonstrate a robust method of stabilizing a diode laser frequency to an atomic transition. This technique employs the Zeeman shift to generate an antisymmetric signal about a Doppler-broadened atomic resonance, and therefore offers a large recapture range as well as high stability. The frequency of a 780-nm diode laser, stabilized to such a signal in Rb, drifted less than 0.5 MHz peak-peak (1 part in 10(9)) in 38 h. This tunable frequency lock can be constructed inexpensively, requires little laser power, rarely loses lock, and can be extended to other wavelengths by use of different atomic species.We demonstrate a robust method of stabilizing a diode laser frequency to an atomic transition. This technique employs the Zeeman shift to generate an antisymmetric signal about a Doppler-broadened atomic resonance, and therefore offers a large recapture range as well as high stability. The frequency of a 780-nm diode laser, stabilized to such a signal in Rb, drifted less than 0.5 MHz peak-peak (1 part in 10(9)) in 38 h. This tunable frequency lock can be constructed inexpensively, requires little laser power, rarely loses lock, and can be extended to other wavelengths by use of different atomic species.

Applied OpticsMay 20, 1998384 citations

Frequency Detuning and Stabilization of a Diode Laser Using the Zeeman Shift of the Saturated Absorption Signal of Rubidium Atoms

Ho Seong Lee, Sung Hoon Yang, Young Bum Kim +3 more

We observed saturated absorption spectra of the 87Rb atom under a magnetic field of several millitesla with a diode laser oscillating at 780 nm. The spectra were compared with the theoretical ones obtained on the basis of Nakayama's four-level model. We numerically computed Zeeman splittings of the 52 P 3/2 excited state of the atom. As the magnetic field increased to 5 mT, the absorption peak of the F=2→F'=3 transition shifted almost linearly up to about 62 MHz. The shift direction was reversed by changing the polarization combination of the pump and probe lasers. The measured frequency stability, when the laser was locked at the absorption peak, was better than σy(τ)= 1 ×10-11τ-1/2 for the sampling time of 0.01 s≤τ≤10 s.We observed saturated absorption spectra of the 87Rb atom under a magnetic field of several millitesla with a diode laser oscillating at 780 nm. The spectra were compared with the theoretical ones obtained on the basis of Nakayama's four-level model. We numerically computed Zeeman splittings of the 52 P 3/2 excited state of the atom. As the magnetic field increased to 5 mT, the absorption peak of the F=2→F'=3 transition shifted almost linearly up to about 62 MHz. The shift direction was reversed by changing the polarization combination of the pump and probe lasers. The measured frequency stability, when the laser was locked at the absorption peak, was better than σy(τ)= 1 ×10-11τ-1/2 for the sampling time of 0.01 s≤τ≤10 s.

Japanese Journal of Applied PhysicsJan 1, 199613 citations

Low-drift Zeeman shifted atomic frequency reference

Dominic J. Reed, Nikola Šibalić, Daniel J. Whiting +3 more

We present a simple method for producing a low-drift atomic frequency reference based upon the Zeeman effect. Our Zeeman Shifted Atomic Reference `ZSAR' is demonstrated to have tens of GHz tuning range, limited only by the strength of the applied field. ZSAR uses Doppler-free laser spectroscopy in a thermal vapor where the vapor is situated in a large, static and controllable magnetic field. We use a heated $^{85}$ Rb vapor cell between a pair of position-adjustable permanent magnets capable of applying magnetic fields up to 1 T. To demonstrate the frequency reference we use a spectral feature from the Zeeman shifted D1 line in $^{85}$ Rb at 795 nm to stabilize a laser to the 7S $_{1/2}$ $\longrightarrow$ 23P $_{1/2}$ transition in atomic cesium, which is detuned by approximately 19 GHz from the unperturbed Rb transition. We place an upper bound on the stability of the technique by measuring a 2.5 MHz RMS frequency difference between the two spectral features over a 24 hour period. This versatile method could be adapted easily for use with other atomic species and the tuning range readily increased by applying larger magnetic fields.We present a simple method for producing a low-drift atomic frequency reference based upon the Zeeman effect. Our Zeeman Shifted Atomic Reference `ZSAR' is demonstrated to have tens of GHz tuning range, limited only by the strength of the applied field. ZSAR uses Doppler-free laser spectroscopy in a thermal vapor where the vapor is situated in a large, static and controllable magnetic field. We use a heated $^{85}$Rb vapor cell between a pair of position-adjustable permanent magnets capable of applying magnetic fields up to 1 T. To demonstrate the frequency reference we use a spectral feature from the Zeeman shifted D1 line in $^{85}$Rb at 795 nm to stabilize a laser to the 7S$_{1/2}$ $\longrightarrow$ 23P$_{1/2}$ transition in atomic cesium, which is detuned by approximately 19 GHz from the unperturbed Rb transition. We place an upper bound on the stability of the technique by measuring a 2.5 MHz RMS frequency difference between the two spectral features over a 24 hour period. This versatile method could be adapted easily for use with other atomic species and the tuning range readily increased by applying larger magnetic fields.

arXiv:1804.07928OSA ContinuumSep 12, 201811 citations

^{85}

Rb vapor cell between a pair of position-adjustable permanent magnets capable of applying magnetic fields up to 1 T. To demonstrate the frequency reference we use a spectral feature from the Zeeman shifted D1 line in

^{85}

Rb at 795 nm to stabilize a laser to the 7S

_{1/2}

\longrightarrow

23P

_{1/2}

transition in atomic cesium, which is detuned by approximately 19 GHz from the unperturbed Rb transition. We place an upper bound on the stability of the technique by measuring a 2.5 MHz RMS frequency difference between the two spectral features over a 24 hour period. This versatile method could be adapted easily for use with other atomic species and the tuning range readily increased by applying larger magnetic fields.