Details
| Original language | English |
|---|---|
| Article number | 125001 |
| Number of pages | 20 |
| Journal | New journal of physics |
| Volume | 25 |
| Issue number | 12 |
| Publication status | Published - 11 Dec 2023 |
Abstract
The nature of atomic vapors, their natural alignment with interatomic transitions, and their ease of use make them highly suited for spectrally narrow-banded optical filters. Atomic filters come in two flavors: a filter based on the absorption of light by the Doppler broadened atomic vapor, i.e. a notch filter, and a bandpass filter based on the transmission of resonant light caused by the Faraday effect. The notch filter uses the absorption of resonant photons to filter out a small spectral band around the atomic transition. The off-resonant part of the spectrum is fully transmitted. Atomic vapors based on the Faraday effect allow for suppression of the detuned spectral fraction. Transmission of light originates from the magnetically induced rotation of linear polarized light close to an atomic resonance. This filter constellation allows selective acceptance of specific light frequencies. In this manuscript, we discuss these two types of filters and elucidate the specialties of atomic line filters. We also present a practical guide on building such filter setups from scratch and discuss an approach to achieve an almost perfect atomic spectrum backed by theoretical calculations.
Keywords
- atomic vapors, Faraday filters, spectroscopy
ASJC Scopus subject areas
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In: New journal of physics, Vol. 25, No. 12, 125001, 11.12.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - How to build an optical filter with an atomic vapor cell
AU - Uhland, Denis
AU - Dillmann, Helena
AU - Wang, Yijun
AU - Gerhardt, Ilja
N1 - Funding Information: The project was funded by the Deutsche Forschungsgemeinschaft with the Project GE 2737/5-1 and the Bundesministerium für Bildung und Forschung (13N15972).
PY - 2023/12/11
Y1 - 2023/12/11
N2 - The nature of atomic vapors, their natural alignment with interatomic transitions, and their ease of use make them highly suited for spectrally narrow-banded optical filters. Atomic filters come in two flavors: a filter based on the absorption of light by the Doppler broadened atomic vapor, i.e. a notch filter, and a bandpass filter based on the transmission of resonant light caused by the Faraday effect. The notch filter uses the absorption of resonant photons to filter out a small spectral band around the atomic transition. The off-resonant part of the spectrum is fully transmitted. Atomic vapors based on the Faraday effect allow for suppression of the detuned spectral fraction. Transmission of light originates from the magnetically induced rotation of linear polarized light close to an atomic resonance. This filter constellation allows selective acceptance of specific light frequencies. In this manuscript, we discuss these two types of filters and elucidate the specialties of atomic line filters. We also present a practical guide on building such filter setups from scratch and discuss an approach to achieve an almost perfect atomic spectrum backed by theoretical calculations.
AB - The nature of atomic vapors, their natural alignment with interatomic transitions, and their ease of use make them highly suited for spectrally narrow-banded optical filters. Atomic filters come in two flavors: a filter based on the absorption of light by the Doppler broadened atomic vapor, i.e. a notch filter, and a bandpass filter based on the transmission of resonant light caused by the Faraday effect. The notch filter uses the absorption of resonant photons to filter out a small spectral band around the atomic transition. The off-resonant part of the spectrum is fully transmitted. Atomic vapors based on the Faraday effect allow for suppression of the detuned spectral fraction. Transmission of light originates from the magnetically induced rotation of linear polarized light close to an atomic resonance. This filter constellation allows selective acceptance of specific light frequencies. In this manuscript, we discuss these two types of filters and elucidate the specialties of atomic line filters. We also present a practical guide on building such filter setups from scratch and discuss an approach to achieve an almost perfect atomic spectrum backed by theoretical calculations.
KW - atomic vapors
KW - Faraday filters
KW - spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85180371144&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2305.00570
DO - 10.48550/arXiv.2305.00570
M3 - Article
AN - SCOPUS:85180371144
VL - 25
JO - New journal of physics
JF - New journal of physics
SN - 1367-2630
IS - 12
M1 - 125001
ER -