Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Advances in quantum-noise-limited Doppler-free optical heterodyne spectroscopy

M. Ducloy

Published Apr 26, 1987• 0 citations
OpenAlex

Related papers

Doppler-free monitoring of weak UV transitions by high frequency optical heterodyne three level spectroscopy

S. Le Boiteux, Daniel Bloch, M. Ducloy +3 more

Optics Communications•Dec 1, 1984•8 citations

Doppler-free Optical-Optical Double Resonance Spectroscopy.

Shunji KASAHARA, Masaaki Baba, Hajime Katô

Journal of the Spectroscopical Society of Japan•Jan 1, 1997•0 citations

Sensing subhertz optical signals at the quantum noise limit with heterodyne detectors

Boya Xie, Dechao He, Peng Yang +1 more

Sensors and Actuators A Physical•Apr 16, 2022•6 citations

Theoretical description of Doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectroscopy under optically saturated conditions

Weiguang Ma, Aleksandra Foltynowicz, Ove Axner

A theoretical description of Doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) under optically saturated conditions is presented. Expressions for the strength and shape of the Doppler-broadened NICE-OHMS signals are given for both the absorption and the dispersion phase, in the Voigt regime as well as in the Doppler limit. It is shown that Doppler-broadened NICE-OHMS is affected less by optical saturation than other cavity-enhanced techniques; in the Doppler limit the absorption signal decreases by a factor of (1+G±1)−1/2, where G±1 is the degree of saturation for one of the frequency modulation sidebands, whereas the dispersion signal is virtually unaffected by optical saturation. In the Voigt regime both signals show additional dependence on optical saturation. The concept of saturation-insensitive detection is introduced and its conditions are identified.

Journal of the Optical Society of America B•Jun 24, 2008•57 citations

Sub-Doppler resolution near-infrared spectroscopy at 128 μm with the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy method

Tzu-Ling Chen, Yi-Wei Liu

We report on the sub-Doppler saturation spectroscopy of the nitrous oxide (N2O) overtone transition at 1.28 μm. This measurement is performed by the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy technique based on the quantum-dot (QD) laser. A high intra-cavity power, up to 10 W, reaches the saturation limit of the overtone line using an optical cavity with a high finesse of 1.14(5)×105. At a pressure of several mTorr, the saturation dip is observed with a full width at half-maximum of about 2 MHz and a signal-to-noise ratio of 71. To the best of our knowledge, this is the first saturation spectroscopy of molecular overtone transitions in the 1.3 μm region. The QD laser is then locked to this dispersion signal with a stability of 15 kHz at 1 s integration time. We demonstrate the potential of the N2O as a marker because of its particularly rich spectrum at the vicinity of 1.28–1.30 μm where there are several important forbidden transitions of atomic parity violation measurements and the 1.3 μm O-band of optical communication.

arXiv:1705.05208•Optics Letters•Jun 15, 2017•10 citations

Quantum Noise in Homodyne Detection

R. Loudon

Springer proceedings in physics•Jan 1, 1986•6 citations
A theoretical description of Doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) under optically saturated conditions is presented. Expressions for the strength and shape of the Doppler-broadened NICE-OHMS signals are given for both the absorption and the dispersion phase, in the Voigt regime as well as in the Doppler limit. It is shown that Doppler-broadened NICE-OHMS is affected less by optical saturation than other cavity-enhanced techniques; in the Doppler limit the absorption signal decreases by a factor of (1+G±1)−1/2, where G±1 is the degree of saturation for one of the frequency modulation sidebands, whereas the dispersion signal is virtually unaffected by optical saturation. In the Voigt regime both signals show additional dependence on optical saturation. The concept of saturation-insensitive detection is introduced and its conditions are identified.
We report on the sub-Doppler saturation spectroscopy of the nitrous oxide (N2O) overtone transition at 1.28 μm. This measurement is performed by the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy technique based on the quantum-dot (QD) laser. A high intra-cavity power, up to 10 W, reaches the saturation limit of the overtone line using an optical cavity with a high finesse of 1.14(5)×105. At a pressure of several mTorr, the saturation dip is observed with a full width at half-maximum of about 2 MHz and a signal-to-noise ratio of 71. To the best of our knowledge, this is the first saturation spectroscopy of molecular overtone transitions in the 1.3 μm region. The QD laser is then locked to this dispersion signal with a stability of 15 kHz at 1 s integration time. We demonstrate the potential of the N2O as a marker because of its particularly rich spectrum at the vicinity of 1.28–1.30 μm where there are several important forbidden transitions of atomic parity violation measurements and the 1.3 μm O-band of optical communication.