A dual-wavelength bandpass Faraday anomalous dispersion optical filter operating on the D1 and D2 lines of rubidium

Yan, Yang; Yuan, Jinpeng; Wang, Lirong; Liu, Xiao; Jia, Suotang

doi:10.1016/j.optcom.2021.127855

Cited by 6 publications

(5 citation statements)

References 41 publications

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“…The spectral intensity differences among profiles come from the coherent accumulation of the amplitude of the selected pulses, and the differences in the tailored pulse groups' center frequencies appear as the FWHM of the spectra. Also, all three profiles bring narrow and high transmission peaks around 780 nm, but there are still tiny peaks at 795 nm, which is consistent with our previous work [20]. The direct detection in the optical spectrum shows the mode selector's high isolation in the wavelength magnitude.…”

Section: Resultssupporting

confidence: 90%

“…Therefore, such an operating condition can provide a tailored pulse group with full-spectrum characteristics. The more detailed experimental results for the mode selectors can be seen in our previous work [20]. A mode selection system covering an optional range of 40 GHz is successfully built around the operating wavelength, which means 160 OFC modes are switchable.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…Therefore, the magnetized atomic medium can become an advised mode selection device with premium tunability and efficiency via the precise polarization selection between the input and the output port. Recently, the magnetized atomic medium as the filter was widely studied when continuous-wavelength (CW) laser served as the source [18] and achieved excellent performance by geometry redesigning, wavelength division multiplexing, and cascaded vapor cells [19][20][21]. The medium has also been applied in quantum optics [22,23] and frequency standards [24].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tailoring the pulse train of an optical frequency comb with a magnetized atomic medium

Yan¹,

Yuan²,

Wang³

et al. 2022

Laser Phys. Lett.

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Selecting specific modes from the complete pulse train of optical frequency comb (OFC) is helpful in ultra-narrow linewidth laser preparation. Here, the mode selector for a commercial OFC based on the magnetized atomic medium is demonstrated in both theory and experiment. Only the comb modes with specific frequencies experience polarization rotation because of the Faraday effect, thus the mode tailoring can be realized by eliminating unchanged OFC modes via polarization selection. The theory study demonstrates the rich tunability of this device, and three specifically chosen operating conditions validate the system’s characteristics. The selected pulse group is distinguished in both optical and frequency spectrum, where spectral differences and bandwidth can be observed accordingly. Further, the selected pulse group and a continuous-wavelength laser stimulate an electromagnetically induced transparency spectrum in the hyperfine Paschen–Back regime to show the pulse group characteristics in detail. The method proposed provides the experimental foundation for producing narrow linewidth lasers from a polychromatic source with tailored results retaining the excellent characteristics of the original.

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Section: Resultssupporting

confidence: 90%

Section: Theoretical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tailoring the pulse train of an optical frequency comb with a magnetized atomic medium

Yan¹,

Yuan²,

Wang³

et al. 2022

Laser Phys. Lett.

Self Cite

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“…Most magnetooptical filters rely on thermal vapor cells due to their compact and resilient setups [50]. Thermal vapor filters can be tuned by varying the magnetic field, temperature and input polarization [51,52] and can switch between different D-line operation [53]. It has been shown that by cascading cells, line-center or wing features can be selected [54].…”

Section: Introductionmentioning

confidence: 99%

Exploiting non-orthogonal eigenmodes in a non-Hermitian optical system to realize sub-100 MHz magneto-optical filters.

Logue¹,

Briscoe²,

Pizzey³

et al. 2023

Preprint

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Non-Hermitian physics is responsible for many of the counter-intuitive effects observed in optics research opening up new possibilities in sensing, polarization control and measurement. A hallmark of non-Hermitian matrices is the possibility of non-orthogonal eigenvectors resulting in coupling between modes. The advantages of propagation mode coupling have been little explored in magneto-optical filters and other devices based on birefringence. Magneto-optical filters select for ultra-narrow transmission regions by passing light through an atomic medium in the presence of a magnetic field. Passive filter designs have traditionally been limited by Doppler broadening of thermal vapors. Even for filter designs incorporating a pump laser, transmissions are typically less than 15% for sub-Doppler features. Here we exploit our understanding of non-Hermitian physics to induce non-orthogonal propagation modes in a vapor and realize better magneto-optical filters. We construct two new filter designs with ENBWs and maximum transmissions of 181 MHz, 42 % and 140 MHz, 17% which are the highest figure of merit and first sub-100 MHz FWHM passive filters recorded respectively. This work opens up a range of new filter applications including metrological devices for use outside a lab setting and commends filtering as a new candidate for deeper exploration of non-Hermitian physics such as exceptional points of degeneracy.

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“…light in the spectral vicinity of atomic resonances [14]. These atomic filters utilise atom-light interactions in a variety of configurations, with the two most common being Faraday [15][16][17][18][19][20] and Voigt filters [21][22][23]. The names are inherited from the corresponding Faraday and Voigt effects, where light is magneto-optically rotated due to induced birefringence as it traverses through a dispersive medium [24].…”

Section: Introductionmentioning

confidence: 99%

Voigt transmission windows in optically thick atomic vapours: a method to create single-peaked line centre filters

Briscoe

Logue

Pizzey

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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Cascading light through two thermal vapour cells has been shown to improve the performance of atomic filters that aim to maximise peak transmission over a minimised bandpass window. In this paper, we explore the atomic physics responsible for the operation of the second cell, which is situated in a transverse (Voigt) magnetic field and opens a narrow transmission window in an optically thick atomic vapour. By assuming transitions with Gaussian line shapes and magnetic fields sufficiently large to access the hyperfine Paschen-Back regime, the window is modelled by resolving the two transitions closest to line centre. We discuss the validity of this model and perform an experiment which demonstrates the evolution of a naturally abundant Rb transmission window as a function of magnetic field. The model results in a significant reduction in two-cell parameter space, which we use to find theoretical optimised cascaded line centre filters for Na, K, Rb and Cs across both D lines. With the exception of Cs, these all have a better figure of merit than comparable single cell filters in literature. Most noteworthy is a Rb-D2 filter which outputs 92% of light through a single peak at line centre, with maximum transmission 0.71 and a width of 330 MHz at half maximum.

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A dual-wavelength bandpass Faraday anomalous dispersion optical filter operating on the D1 and D2 lines of rubidium

Cited by 6 publications

References 41 publications

Tailoring the pulse train of an optical frequency comb with a magnetized atomic medium

Tailoring the pulse train of an optical frequency comb with a magnetized atomic medium

Exploiting non-orthogonal eigenmodes in a non-Hermitian optical system to realize sub-100 MHz magneto-optical filters.

Voigt transmission windows in optically thick atomic vapours: a method to create single-peaked line centre filters

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