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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
Narrowband tunable filter based on velocity-selective optical pumping in an atomic vapor
Alessandro Cerè1, Valentina Parigi, Marta Abad
1Institut de Ciencies Fotoniques, Mediterranean Technology Park, Barcelona, Spain. alessandro.cere@icfo.es
Optics Letters
|April 3, 2009
Summary
We developed a tunable narrowband optical filter using rubidium vapor. This filter offers high extinction and tunable resonance for atom-photon interactions.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Quantum Optics
- Spectroscopy
Background:
- Atomic filters are crucial for selective light manipulation.
- Existing filters often operate off-resonance, limiting atom-photon interactions.
- Rubidium vapor offers unique optical properties for filter development.
Purpose of the Study:
- To demonstrate a novel tunable narrowband filter.
- To achieve resonance with atomic media for enhanced atom-photon interactions.
- To explore optical-pumping-induced circular dichroism for filter applications.
Main Methods:
- Utilizing optical pumping to induce circular dichroism in rubidium vapor.
- Characterizing filter performance: peak transmission, linewidth, and extinction.
- Tuning the filter's transmission peak across the Doppler linewidth of rubidium D1 line.
Main Results:
- Achieved a peak transmission of 14.6%.
- Obtained a narrow linewidth of 80 MHz.
- Demonstrated an out-of-band extinction greater than or equal to 35 dB.
- Successfully tuned the transmission peak within the Doppler linewidth at 795 nm.
Conclusions:
- The developed filter is tunable and operates at resonance with atomic media.
- This technique is advantageous for atom-photon interaction experiments.
- The method is adaptable for other alkali atoms, broadening its applicability.
