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IEEE Journal of Quantum Electronics

Experimental demonstration of a diode laser-excited optical filter in atomic Rb vapor

Yun Chur Chung, Thomas M. Shay

Published May 1, 1988• 10 citations
Publisher

Abstract

A narrow-bandwidth optical filter using diode-laser-pumped atomic Rb vapor has been demonstrated. Excellent rejection of off-resonant laser photons has been achieved. The measured detection bandwidth was 1.18 GHz at the Rb cell temperature of 150 degrees C, which shows a good agreement with the calculated detection bandwidth of 1.02 GHz. The quantum efficiency of the atomic Rb vapor laser-excited optical filter is linearly dependent on the diode laser pumping power.>

DOI
10.1109/3.185

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Chinese Optics Letters•Jan 1, 2014•4 citations
A narrow-bandwidth optical filter using diode-laser-pumped atomic Rb vapor has been demonstrated. Excellent rejection of off-resonant laser photons has been achieved. The measured detection bandwidth was 1.18 GHz at the Rb cell temperature of 150 degrees C, which shows a good agreement with the calculated detection bandwidth of 1.02 GHz. The quantum efficiency of the atomic Rb vapor laser-excited optical filter is linearly dependent on the diode laser pumping power.>
We report a simple theoretical model for the calculation of the dependence of filter quantum efficiency versus laser pump power in an atomic Rb vapor laser-excited optical filter. We present the calculations for a Rb filter transitions that can be used to detect the practial and important frequency-doubled Nd lasers. The results of these calculations show the filter's quantum efficiency versus the laser pump power. The laser pump powers required range from 2.4 to 60 mW per square centimeter of filter aperture.
A simple theoretical model for the calculation of the dependence of filter quantum efficiency versus laser pump power in an atomic Rb vapor laser-excited optical filter is reported. Calculations for Rb filter transitions that can be used to detect the practical and important frequency-doubled Nd lasers are presented. The results of these calculations show the filter's quantum efficiency versus the laser pump power. The required laser pump powers required range from 2.4 to 60 mW/cm/sup 2/ of filter aperture.>
We report a simple theoretical model for the calculation of the dependence of filter quantum efficiency versus laser pump power in an atomic Rb vapor laser-excited optical filter. We present the calculations for a 532.4-nm Rb filter that can be used to detect the practical and important frequency-doubled Nd:YAG laser. The results of these calculations show that the filter's quantum efficiency is relatively insensitive to the laser pump power. The laser powers required to pump the filter range from 3.6 to 226 mW per square centimeter of filter aperture.
Narrow-bandwidth optical sources are readily available. However, tunable narrow-bandwidth, wide field-of-view optical filters are not available. The laser-pumped atomic vapor optical filters presented here are in principle tunable narrow-bandwidth, wide field-of-view optical filters. These filters can simultaneously provide high resolution (0.001 nm), wide field-of-view (±90°), high quantum efficiency, and electrically tunable optical filtering. These devices are ideally suited for extracting weak narrow-bandwidth signals buried in strong nonresonant optical background radiation. Potential applications of these fitters include laser communications, laser radar, detection of Raman radiation, and atomic spectroscopy.
We report the experimental demonstration of an ultranarrow bandwidth atomic filter by optically induced polarization rotation in multilevel electromagnetically induced transparency systems in hot Rb vapor.With a coupling intensity of 2.3 W/cm 2 , the filter shows a peak transmission of 33.2% and a bandwidth of 10 MHz.By altering the coupling frequency, a broad tuning range of several Doppler linewidths of the D1 line transitions of 87 Rb atoms can be obtained.The presented atomic filter has useful features of ultranarrow bandwidth, and the operating frequency can be tuned resonance with the atomic transition.Such narrowband tunable atomic filter can be used as an efficient noise rejection tool in classical and quantum optical applications.