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Chinese Science Bulletin

Faraday anomalous dispersion optical filter

An Dang

Published Jan 1, 2010• 5 citations
OpenAlex

Abstract

The function and requirements of optical filter for different systems are introduced,whereby the distinctions of atomic optical filter in comparison to the traditional optical filter are presented and the development of atomic filter is summarized.Furthermore,a general model for calculating the transmittance of Faraday anomalous dispersion optical filter (FADOF) is presented,which is applicable for both passive and active working modes of FADOF.It shows that the theoretical calculation match the experimental results perfectly.Also,we report the progress on the theory and experiment research of passive and active FADOF in our group.

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IEEE Journal of Quantum Electronics•Mar 1, 2001•36 citations
The function and requirements of optical filter for different systems are introduced,whereby the distinctions of atomic optical filter in comparison to the traditional optical filter are presented and the development of atomic filter is summarized.Furthermore,a general model for calculating the transmittance of Faraday anomalous dispersion optical filter (FADOF) is presented,which is applicable for both passive and active working modes of FADOF.It shows that the theoretical calculation match the experimental results perfectly.Also,we report the progress on the theory and experiment research of passive and active FADOF in our group.
The function and requirements of optical filter for different systems are introduced, whereby the distinctions of atomic optical filter in comparison to the traditional optical filter are presented and the development of atomic filter is summarized. Furthermore, a general model for calculating the transmittance of Faraday anomalous dispersion optical filter (FADOF) is presented, which is applicable for both passive and active working modes of FADOF. It shows that the theoretical calculation match the experimental results perfectly. Also, we report the progress on the theory and experiment research of passive and active FADOF in our group.
An application of a high-performance ultra-narrow band optical filter-Faraday anomalous dispersion optical filter(FADOF)is introduced,which can be used in wireless optical communication of manned space engineering.The performance parameters of the Cs-FADOF are presented.A frequency stabilized beacon light system based on Cs-FADOF is designed,which can automatically stabilize the output frequency on a FADOF's transmission peak,with the frequency stability reach a level of 3.4x10-9.The current application scenarios of FADOF are summarized,and the main research directions in manned space engineering are presented,which can provide support for the future development of manned engineering program.
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.
The characteristics of a potassium Faraday anomalous dispersion optical filter operating on the blue and near infrared transitions are calculated. The results show that the filter can be designed to provide high transmission, very narrow pass bandwidth, and low equivalent noise bandwidth. The Faraday anomalous dispersion optical filter (FADOF) provides a narrow pass bandwidth (about GHz) optical filter for laser communications, remote sensing, and lidar. The general theoretical model for the FADOF has been established in our previous paper. In this paper, we have identified the optimum operational conditions for a potassium FADOF operating on the blue and infrared transitions. The signal transmission, bandwidth, and equivalent noise bandwidth (ENBW) are also calculated.
We propose a Faraday anomalous dispersion optical filter (FADOF) based on a rare-earth ion doped crystal. We present theoretical analyses for the solid-state FADOF transmission. Our theoretical model predicts a maximum transmission efficiency of 7171%71 and a double-peaked transmission spectrum with a bandwidth of 6 GHz under current experimental conditions. Our proposal may have important applications in optical communications.
An ultra-narrow bandwidth potassium Faraday anomalous dispersion optical filter (FADOF) at the D/sub 2/ line is studied theoretically and experimentally. The effect of temperature on the characteristics of the potassium Faraday filter is discussed and the transmission versus temperature is given. Our research results show that the transmission of the K-FADOF reaches nearly 90% with a bandwidth of only 1.5 GHz. To meet different requirements, K-FADOF can operate at line-center or in the line-wing by changing the working parameters.