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

中国物理B：英文版

Two-photon spectrum of 87Rb using optical frequency comb

汪丽蓉, 张一驰, 向少山, 曹书凯, Liantuan Xiao, 贾锁堂

Published Jan 1, 2015• 0 citations
OpenAlex

Abstract

The high precision two-photon excitation measurements for 5S1/2(F87g = 2) to 5D5/2(Fe = 4 to 1) ofRb are performed by using an optical frequency comb.The two counter-propagating femtosecond pulses(5S1/2→5P3/2at 780 nm,and 5P3/2→5D5/2at 776 nm) act on87 Rb vapor,and the Doppler broadened background signal is effectively eliminated.The temperature and power dependences of the two-photon spectrum are studied in this paper.

Related papers

Two-photon spectrum of 87 Rb using optical frequency comb

Lirong Wang, Yichi Zhang, Shao-Shan Xiang +3 more

The high precision two-photon excitation measurements for 5S 1/2 ( F g = 2) to 5D 5/2 ( F e = 4 to 1) of 87 Rb are performed by using an optical frequency comb. The two counter-propagating femtosecond pulses (5S 1/2 → 5P 3/2 at 780 nm, and 5P 3/2 → 5D 5/2 at 776 nm) act on 87 Rb vapor, and the Doppler broadened background signal is effectively eliminated. The temperature and power dependences of the two-photon spectrum are studied in this paper.

Chinese Physics B•Jun 1, 2015•6 citations

High-Resolution Rb Two-Photon Transition Spectroscopy by a Femtosecond Frequency Comb via Pulses Control

Yichi Zhang, Peng-Rui Fan, Jinpeng Yuan +3 more

We experimentally observe the high resolution direct frequency comb spectroscopy using counter-propagating broadband femtosecond pulses on two-photon transitions in room-temperature 87 Rb atoms. The Doppler broadened background is effectively eliminated with the pulse shaping method and the spectrum modulation technique. The combination of the pulse shaping method and the spectra modulation technique provides a potential approach to reduce background of at least 99%.

Chinese Physics Letters•Nov 1, 2016•2 citations

Observation of Rb two-photon absorption directly excited by an erbium-fiber-laser-based optical frequency comb via spectral control

Jiutao Wu, Dong Hou, Zhengyu Qin +2 more

We present the observation of the Rb two-photon spectrum directly excited by an Er:fiber laser comb in a hot atomic vapor system. The influences of the atomic velocity distribution on direct and sequential two-photon transitions are discussed respectively and a combination of corresponding spectral control techniques is developed to eliminate the Doppler broadening background. A direct frequency comb spectroscopy is obtained with high-resolution two-photon transition lines. These techniques would benefit spectroscopy measurement in hot atomic vapor systems, and pave the way for establishing a high-stability optical frequency comb in 1.5 $\ensuremath{\mu}$m optical communication bands based on the Rb two-photon transitions.

arXiv:1306.2205•Physical Review A•Apr 14, 2014•10 citations

Precision Frequency Measurement of 87 Rb 5 S 1/2 ( F = 2)→5 D 5/2 ( F ″ = 4) Two-Photon Transition through a Fiber-Based Optical Frequency Comb

Wei Xia, Shaoyang Dai, Yin Zhang +3 more

Precision Frequency Measurement of 87Rb 5S1/2 (F = 2)→5D5/2 (F″ = 4) Two-Photon Transition through a Fiber-Based Optical Frequency Comb*, Xia, Wei, Dai, Shao-Yang, Zhang, Yin, Li, Kun-Qian, Yu, Qi, Chen, Xu-Zong

Chinese Physics Letters•May 1, 2016•2 citations

Investigation on the Monochromatic Two-Photon Transition Spectroscopy of Rubidium by Using Intensity Modulation Method

Sandan Wang, Jinpeng Yuan, Lirong Wang +2 more

We experimentally study the high-resolution two-photon spectroscopy of rubidium using a single laser. The 5S1/2 − 5P3/2 − 5D5/2 transition is realized via 778.1 nm laser beams acting on the vapor with a counter-propagating configuration. The intensity modulation method is employed to improve the signal-to-noise ratio of the spectrum by two orders of magnitude compared with that for direct measurement. The effects of the vapor temperature, the frequency-scanning speed of the laser, the polarization combination of the laser beams, and the laser power on the spectra are investigated to obtain the optimal experimental parameters. This research is expected to be beneficial for potential applications since it can be used to realize a compact and high-precision frequency standard for optical communication.

Journal of the Physical Society of Japan•Jul 18, 2018•7 citations

Chirped-pulse direct frequency-comb spectroscopy of two-photon transitions

Akira Ozawa, Yohei Kobayashi

The two-photon transition of ${}^{87}$Rb ($5{S}_{1/2}\ensuremath{-}4{D}_{3/2}$, $5{S}_{1/2}\ensuremath{-}4{D}_{5/2}$) in a vapor cell is investigated with direct frequency-comb spectroscopy. When strong chirp is imposed on a frequency comb, it is found that the Doppler-free signal amplitude barely degrades despite a significant reduction in peak intensity. In addition, it is found that the Doppler-broadened signal is strongly dependent on the applied chirp. We present a simple model that explains this counterintuitive behavior based on the elongated spatial extent of chirped pulses. Keeping Doppler-free signals almost constant, Doppler-broadened background signals can be strongly suppressed with chirped-pulse excitations. Consequently, in the case of uniformly distributed target atoms, chirped-pulse direct frequency-comb spectroscopy can be a useful method to improve the signal-to-noise ratio in two-photon direct frequency-comb spectroscopy.

Physical Review A•Aug 23, 2012•21 citations
The high precision two-photon excitation measurements for 5S1/2(F87g = 2) to 5D5/2(Fe = 4 to 1) ofRb are performed by using an optical frequency comb.The two counter-propagating femtosecond pulses(5S1/2→5P3/2at 780 nm,and 5P3/2→5D5/2at 776 nm) act on87 Rb vapor,and the Doppler broadened background signal is effectively eliminated.The temperature and power dependences of the two-photon spectrum are studied in this paper.
We present the observation of the Rb two-photon spectrum directly excited by an Er:fiber laser comb in a hot atomic vapor system. The influences of the atomic velocity distribution on direct and sequential two-photon transitions are discussed respectively and a combination of corresponding spectral control techniques is developed to eliminate the Doppler broadening background. A direct frequency comb spectroscopy is obtained with high-resolution two-photon transition lines. These techniques would benefit spectroscopy measurement in hot atomic vapor systems, and pave the way for establishing a high-stability optical frequency comb in 1.5 $\ensuremath{\mu}$m optical communication bands based on the Rb two-photon transitions.
We experimentally study the high-resolution two-photon spectroscopy of rubidium using a single laser. The 5S1/2 − 5P3/2 − 5D5/2 transition is realized via 778.1 nm laser beams acting on the vapor with a counter-propagating configuration. The intensity modulation method is employed to improve the signal-to-noise ratio of the spectrum by two orders of magnitude compared with that for direct measurement. The effects of the vapor temperature, the frequency-scanning speed of the laser, the polarization combination of the laser beams, and the laser power on the spectra are investigated to obtain the optimal experimental parameters. This research is expected to be beneficial for potential applications since it can be used to realize a compact and high-precision frequency standard for optical communication.
The two-photon transition of 87{}^{87}87Rb ($5{S}_{1/2}\ensuremath{-}4{D}_{3/2}$, $5{S}_{1/2}\ensuremath{-}4{D}_{5/2}$) in a vapor cell is investigated with direct frequency-comb spectroscopy. When strong chirp is imposed on a frequency comb, it is found that the Doppler-free signal amplitude barely degrades despite a significant reduction in peak intensity. In addition, it is found that the Doppler-broadened signal is strongly dependent on the applied chirp. We present a simple model that explains this counterintuitive behavior based on the elongated spatial extent of chirped pulses. Keeping Doppler-free signals almost constant, Doppler-broadened background signals can be strongly suppressed with chirped-pulse excitations. Consequently, in the case of uniformly distributed target atoms, chirped-pulse direct frequency-comb spectroscopy can be a useful method to improve the signal-to-noise ratio in two-photon direct frequency-comb spectroscopy.