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Doppler-Free Laser-Induced Dichroism and Birefringence

Christian Delsart, J. Keller

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 197713 citations

Laser-induced birefringence by using a linearly polarized field in Na D1 line and its application to laser frequency stabilization

Han Seb Moon, Do-Young Jeong, Kwang-Hoon Ko +1 more

Optics CommunicationsOct 18, 20036 citations

Laser-induced dichroism and birefringence in two- and three-level systems of neon

Christian Delsart, J. Keller

We have observed the Doppler-free dichroism and birefringence induced by a linearly polarized laser beam (pump beam) by monitoring the polarization and amplitude changes of a weak probe beam through an analyzer. The effects have been observed in two-level systems and also in three-level systems of Ne I. At rather low pump power, a typical refractive-index anisotropy of 10−8 has been measured. We have shown that, when the normal resonance curve exhibits a broad background due to collisions, our method allows the elimination of this background. In addition, using a rotating analyzer, we have obtained simultaneously the dichroism and birefringence curves, i.e., the imaginary and real part of the anisotropic-induced susceptibility.We have observed the Doppler-free dichroism and birefringence induced by a linearly polarized laser beam (pump beam) by monitoring the polarization and amplitude changes of a weak probe beam through an analyzer. The effects have been observed in two-level systems and also in three-level systems of Ne I. At rather low pump power, a typical refractive-index anisotropy of 10−8 has been measured. We have shown that, when the normal resonance curve exhibits a broad background due to collisions, our method allows the elimination of this background. In addition, using a rotating analyzer, we have obtained simultaneously the dichroism and birefringence curves, i.e., the imaginary and real part of the anisotropic-induced susceptibility.

Journal of Applied PhysicsJul 1, 197820 citations

Laser-induced birefringence in a wavelength-mismatched cascade system of inhomogeneously broadened Yb atoms

Tai Hyun Yoon, Chang Yong Park, Sung Jong Park

We report the observation of laser-induced birefringence (LIB) in a wavelength-mismatched cascade system ($J=0\ensuremath{\leftrightarrow}J=1\ensuremath{\leftrightarrow}J=0$ transitions) of inhomogeneously broadened ytterbium atoms with strong pump and probe fields. We investigate the transmission spectrum of two circular polarization (${\ensuremath{\sigma}}_{p}^{+}$ and ${\ensuremath{\sigma}}_{p}^{\ensuremath{-}}$) components of strong probe field at fixed frequency, depending on the detuning of a circularly polarized $({\ensuremath{\sigma}}_{c}^{\ensuremath{-}})$ coupling field from two-photon resonance. We find that the ${\ensuremath{\sigma}}_{p}^{+}$ $({\ensuremath{\sigma}}_{p}^{\ensuremath{-}})$ polarized component exhibits a narrow electromagnetically induced absorption (transparency) spectrum. Numerical solutions of density matrix equations show qualitative agreement with experimental results. A Doppler-free dispersive LIB signal is obtained by detecting the Stokes parameter of the probe field, enabling us to stabilize the frequency of the coupling laser without frequency modulation.We report the observation of laser-induced birefringence (LIB) in a wavelength-mismatched cascade system ($J=0\ensuremath{\leftrightarrow}J=1\ensuremath{\leftrightarrow}J=0$ transitions) of inhomogeneously broadened ytterbium atoms with strong pump and probe fields. We investigate the transmission spectrum of two circular polarization (${\ensuremath{\sigma}}_{p}^{+}$ and ${\ensuremath{\sigma}}_{p}^{\ensuremath{-}}$) components of strong probe field at fixed frequency, depending on the detuning of a circularly polarized $({\ensuremath{\sigma}}_{c}^{\ensuremath{-}})$ coupling field from two-photon resonance. We find that the ${\ensuremath{\sigma}}_{p}^{+}$ $({\ensuremath{\sigma}}_{p}^{\ensuremath{-}})$ polarized component exhibits a narrow electromagnetically induced absorption (transparency) spectrum. Numerical solutions of density matrix equations show qualitative agreement with experimental results. A Doppler-free dispersive LIB signal is obtained by detecting the Stokes parameter of the probe field, enabling us to stabilize the frequency of the coupling laser without frequency modulation.

arXiv:physics/0411028Physical Review ADec 14, 200446 citations

Laser Modified Birefringence in a Doppler Broadened Medium

P. J. Manson, Hans‐A. Bachor, R. J. Sandeman

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 19870 citations

Frequency Stabilization of a Laser Diode with Use of Light-Induced Birefringence in an Atomic Vapor

Yutaka Yoshikawa, Takeshi Umeki, Takuro Mukae +2 more

We present a simple modulation-free technique to stabilize a laser frequency to the Doppler-free spectra of an atomic vapor. Polarization spectroscopy with use of a balanced polarimeter allows us to obtain a background-free dispersion signal suitable for high-speed and robust frequency stabilization. We employed the method to the 5S(1/2) F = 2 --> 5P(3/2) F' = 3 transition of 87Rb atoms. The achieved feedback bandwidth was approximately 100 kHz, and an efficient suppression of the frequency noise in a laboratory environment was attained.We present a simple modulation-free technique to stabilize a laser frequency to the Doppler-free spectra of an atomic vapor. Polarization spectroscopy with use of a balanced polarimeter allows us to obtain a background-free dispersion signal suitable for high-speed and robust frequency stabilization. We employed the method to the 5S(1/2) F = 2 --> 5P(3/2) F' = 3 transition of 87Rb atoms. The achieved feedback bandwidth was approximately 100 kHz, and an efficient suppression of the frequency noise in a laboratory environment was attained.

Applied OpticsJan 1, 200383 citations

Observation of doppler-free laser-induced birefringence using interferences of polarized light

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