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

International Conference on Wireless Communications and Signal Processing (WCSP)

Cesium Faraday Optical Filter for Wireless Optical Communication System

Pengyuan Chang, Hangbo Shi, Zhiyang Wang, Jianxiang Miao, Tiantian Shi, Hong Mei Guo, Jingbiao Chen

Published Oct 20, 2021• 2 citations
Publisher

Abstract

We report the newest experimental results of Cs-D2line 852 nm Faraday optical filters for wireless optical communication system. We measure the transmission spectrum of the Faraday optical filters with different temperature, magnetic field intensity, and with or without buffer gas. The Cs-852nm Faraday optical filters is based on atomic vapor cell, with the increase of magnetic field strength and the filling of buffer gas at a certain pressure. The bandwidth, transmittance and line shape of the transmission spectrum are changed obviously. The results can be used for free-space laser communications.

DOI
10.1109/wcsp52459.2021.9613498

Related papers

The Characteristics of Ar and Cs Mixed Faraday Optical Filter Under Different Signal Powers

Junyu Xiong, Bin Luo, Longfei Yin +2 more

The characteristics of the 852 nm cesium Faraday anomalous dispersion optical filter with Ar-filled cesium cell under different signal powers are investigated. The transmittance spectra are measured by changing the input laser power from 0.05 to 10 mW (the irradiance from 12.03 to 2406.88 W/m2) and the buffer gas pressure from 1 to 10 torr. The spectra without the buffer gas are also measured. The results reveal the entirely different variations of the transmittance spectra for the cells with and without the buffer gas. For the cell without the buffer gas, the sidebands of the spectrum get higher and the bandwidth is broadened as the input power increases. However, for the cell with the buffer gas, the sidebands are suppressed and the bandwidth is reduced. A single-peak transmittance spectrum will be formed eventually. These phenomena are remarkable at relatively high pressures of Ar (5 and 10 torr), which may be very suitable for applications such as Faraday laser, optical frequency standard, laser frequency stabilization, and laser locking. The sidebands of the spectrum can also be used to restrict the high input laser power which may cause damage to the system.

IEEE Photonics Technology Letters•Mar 8, 2018•12 citations

Filter Performance of a Cesium Faraday Optical Filter at 852 nm

Zhang Yun-Dong, Xiaoling Jia, Bi Yong +2 more

We have investigated a cesium Faraday filter at 852nm in relatively weak and strong magnetic fields, theoretically and experimentally. With a cesium cell of 0.02m length in an axial magnetic field of 0.06T, the line-centre operation has been achieved. The calculated peak transmission reached 99% with a full width at half maximum (FWHM) bandwidth of only 3.9 GHz. The measured FWHM bandwidth of the filter is 3.29 GHz, which is in general agreement with the theoretical result.

Chinese Physics Letters•May 28, 2002•5 citations

Cesium faraday anomalous dispersion optical filter with buffer gas

Junyu Xiong, Longfei Yin, Hong Mei Guo +1 more

We report a cesium Faraday anomalous dispersion optical filter (FADOF), of which the atom vapor cell is filled with argon as buffer gas. The result shows that, with the help of buffer gas, the sidebands of the FADOF are removed and a transmittance spectrum with one single peak is realized.

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•May 1, 2016•1 citation

Sidebands suppression of 852 nm Cesium Faraday anomalous dispersion optical filter by argon gas

Junyu Xiong, Longfei Yin, Bin Luo +2 more

In this work, sidebands suppression brought by buffer gas argon (Ar) in cesium Faraday anomalous dispersion optical filter (FADOF) at 852 nm is investigated. FADOF performances at different Ar pressures (0 torr, 1 torr, 5 torr and 10 torr) are compared, and a single-peak transmittance spectrum with peak transmittance up to 80% is achieved at the high Ar pressure. A detailed analysis shows that, this sidebands suppression comes from the depopulation enhancement by the buffer gas. This result can be generalized to other FADOFs with similar level structures such as the D2 lines of other alkali metal atoms.

arXiv:1711.06676•Nov 14, 2017•2 citations

Investigation of the temperature and magnetic field effect on the Cesium D1 atomic line filter characteristics

Mohammad Karami, Saed Golshan Khavas, Farrokh Sarreshtedari

Atomic spectral line filter is a narrow band pass optical filter which has many applications in quantum and laser systems. By engineering the system parameters like gas temperature and intensity of magnetic field, the filter with desired characteristics could be obtained. In this work, an atomic spectral line filter for Cesium D1 line (894.6nm) is implemented and characterized. The effect of system parameters on the filter transmission and its bandwidth is investigated. It is observed that by applying a magnetic field of 390 Gauss and adjusting the gas cell temperature on 40°C, a single peak filter with maximum filter transmission and FWHM of 0.24 GHz could be obtained.

Iranian Journal of Physics Research•May 1, 2022•0 citations

Demonstration of Faraday anomalous dispersion optical filter with reflection configuration

Yi Liu, Baodong Yang, Junmin Wang +3 more

Abstract A narrow linewidth Faraday anomalous dispersion optical filter (FADOF) with reflection configuration is achieved for the first time based on the cesium (Cs) ground state 6S1/2 to the excited state 6P3/2 transition at 852 nm. Compared with the conventional FADOF with transmission configuration, reflection-type FADOF can greatly improve the transmittance of optical filter under the same experimental parameters, because it allows signal light to go and return through the atomic vapor cell. In our experiment, peak transmittance at Cs 6S1/2 F = 4–6P3/2 transition is 81% for the reflection-type FADOF, and while 54% for the transmission-type FADOF when the temperature of Cs vapor cell and the axial magnetic field are 60 °C and 19 G. The idea of this reflection-type FADOF design has the potential to be applied to the FADOF operating between two excited states to obtain higher transmittance.

Chinese Physics B•Sep 1, 2021•10 citations
We report the newest experimental results of Cs-D2line 852 nm Faraday optical filters for wireless optical communication system. We measure the transmission spectrum of the Faraday optical filters with different temperature, magnetic field intensity, and with or without buffer gas. The Cs-852nm Faraday optical filters is based on atomic vapor cell, with the increase of magnetic field strength and the filling of buffer gas at a certain pressure. The bandwidth, transmittance and line shape of the transmission spectrum are changed obviously. The results can be used for free-space laser communications.
The characteristics of the 852 nm cesium Faraday anomalous dispersion optical filter with Ar-filled cesium cell under different signal powers are investigated. The transmittance spectra are measured by changing the input laser power from 0.05 to 10 mW (the irradiance from 12.03 to 2406.88 W/m2) and the buffer gas pressure from 1 to 10 torr. The spectra without the buffer gas are also measured. The results reveal the entirely different variations of the transmittance spectra for the cells with and without the buffer gas. For the cell without the buffer gas, the sidebands of the spectrum get higher and the bandwidth is broadened as the input power increases. However, for the cell with the buffer gas, the sidebands are suppressed and the bandwidth is reduced. A single-peak transmittance spectrum will be formed eventually. These phenomena are remarkable at relatively high pressures of Ar (5 and 10 torr), which may be very suitable for applications such as Faraday laser, optical frequency standard, laser frequency stabilization, and laser locking. The sidebands of the spectrum can also be used to restrict the high input laser power which may cause damage to the system.
In this work, sidebands suppression brought by buffer gas argon (Ar) in cesium Faraday anomalous dispersion optical filter (FADOF) at 852 nm is investigated. FADOF performances at different Ar pressures (0 torr, 1 torr, 5 torr and 10 torr) are compared, and a single-peak transmittance spectrum with peak transmittance up to 80% is achieved at the high Ar pressure. A detailed analysis shows that, this sidebands suppression comes from the depopulation enhancement by the buffer gas. This result can be generalized to other FADOFs with similar level structures such as the D2 lines of other alkali metal atoms.
Atomic spectral line filter is a narrow band pass optical filter which has many applications in quantum and laser systems. By engineering the system parameters like gas temperature and intensity of magnetic field, the filter with desired characteristics could be obtained. In this work, an atomic spectral line filter for Cesium D1 line (894.6nm) is implemented and characterized. The effect of system parameters on the filter transmission and its bandwidth is investigated. It is observed that by applying a magnetic field of 390 Gauss and adjusting the gas cell temperature on 40°C, a single peak filter with maximum filter transmission and FWHM of 0.24 GHz could be obtained.
Abstract A narrow linewidth Faraday anomalous dispersion optical filter (FADOF) with reflection configuration is achieved for the first time based on the cesium (Cs) ground state 6S1/2 to the excited state 6P3/2 transition at 852 nm. Compared with the conventional FADOF with transmission configuration, reflection-type FADOF can greatly improve the transmittance of optical filter under the same experimental parameters, because it allows signal light to go and return through the atomic vapor cell. In our experiment, peak transmittance at Cs 6S1/2 F = 4–6P3/2 transition is 81% for the reflection-type FADOF, and while 54% for the transmission-type FADOF when the temperature of Cs vapor cell and the axial magnetic field are 60 °C and 19 G. The idea of this reflection-type FADOF design has the potential to be applied to the FADOF operating between two excited states to obtain higher transmittance.