Polarization Independent Atomic Prism filter for removing Amplified Spontaneous Emission
Raphael David Cohen, Christopher A. Mullarkey, John C. Howell, Nadav, Katz
TL;DR
This paper presents a polarization-independent atomic prism filter that effectively removes amplified spontaneous emission from lasers, with potential applications in quantum information and spectroscopy.
Contribution
We developed a narrow band-pass filter based on atomic dispersion in a vapor cell that is polarization independent and highly effective at suppressing unwanted emission.
Findings
Achieved >30 dB suppression of spontaneous emission
Bandwidth of the filter is 1.3 GHz
Filter operates independently of polarization
Abstract
We create an optical frequency, polarization independent, narrow band-pass filter of 1.3 GHz (3 dB bandwidth), using the steep dispersion near the Rubidium D1 atomic transitions within a prism-shaped vapor cell. This enables us to clean the amplified spontaneous emission from a laser by more than 3 orders of magnitude. Such a filter could find uses in fields such as quantum information processing and Raman spectroscopy.
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