We report an excited-state Faraday anomalous-dispersion optical filter operating on the rubidium 5P(3/2)-5D(5/2) transition (775.9 nm in vacuum) without the use of a pump laser. An electrodeless discharge vapor lamp is employed to replace the Rb vapor cell in a traditional Faraday anomalous-dispersion optical filter system. Atoms can be excited by power rather than a complex frequency-locked pump laser. A proof-of-concept experimental demonstration with a maximum transmission of 1.9% and a filter bandwidth of 650 MHz is presented.
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| http://dx.doi.org/10.1364/OL.36.004611 | DOI Listing |
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- - The study introduces a new method to create an optical single-sideband laser for Raman transitions using a Faraday anomalous dispersion atomic filter (FADOF), aimed at reducing errors in atom gravimeters.
- - This method significantly decreases additional sidebands, achieving a signal-to-noise ratio of over 50 dB, and lowers phase shift errors caused by these sidebands from 358.8 to 2.2 mrad.
- - The FADOF-based Raman laser system has been successfully tested in a compact atom gravimeter, proving its effectiveness for accurate gravity measurements.
A Faraday anomalous dispersion optical filter (FADOF) could lock high-power diode lasers to atomic resonance lines with ultra-narrow bandwidth. However, the polarization sensitivity of the Faraday filter limits its applications since the standard diode module often employs polarization combination to increase pumping brightness. We proposed a polarization-insensitive mutual injection configuration to solve this problem and locked a standard polarization combined diode module to Rb D-line.
View Article and Find Full Text PDFThe high solar background during the day adversely affects the long distance daytime operations of ghost imaging. It is extremely hard to distinguish the signal light from the background noise light after they are both converted to voltage or current signals by the bucket detector, so spectral filtering before the detector is quite important. In this work, a Faraday anomalous dispersion optical filter (FADOF) is used in eliminating the background light influence in ghost imaging.
View Article and Find Full Text PDFWe described a wavelength locked and spectral narrowed high-power diode laser with a Faraday anomalous dispersion optical filter (FADOF). By an external cavity with a Rb FADOF, the central wavelength of the diode laser was precisely locked to the Rb resonance D line. The bandwidth was narrowed from the free-running 4 nm to 0.
View Article and Find Full Text PDFAs a new, to the best of our knowledge, alternative to the saturated vapor-cell-based Faraday anomalous dispersion optical filter (FADOF), the FADOF based on a hollow cathode lamp (HCL-FADOF) not only enables the FADOF to work normally at room temperature without heating, but also has some new features due to the inherent characteristics of the HCL. In this Letter, we implement an HCL-FADOF operating on the rubidium D2 line and experimentally investigate the effect of ambient temperature on its performance and cold-start characteristics. Results show that the HCL-FADOF can provide excellent stability within a large temperature range, even at temperatures below 0°C.
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