Resonant Voigt-effect spectrum of the rubidium D^2 transition

Muroo, Kazuyuki; Matsunobe, T.; Shishido, Yukio; Tukubo, Yoshitaka; Yamamoto, Manabu

doi:10.1364/josab.11.000409

Cited by 16 publications

(14 citation statements)

References 10 publications

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“…3, a VADOF is designed with a transversal permanent magnetic field, which is perpendicular to the filter axis [10]. Thus, its basis for the polarization rotation is the resonant Voigt effect [13], which induces linear birefringence for the light near the atomic transition. With the appropriate temperature and magnetic field, the signal near the atomic transition is passed through the filter, but the noise is suppressed severely.…”

Section: B Signal Receiving Model Of the Fisheye Lensmentioning

confidence: 99%

“…Generally, the traditional optical interference filters are not a good choice for this ultra-wide FOV system, because its performance is dependent on the incident angle [12]. Therefore, we introduce the Voigt anomalous dispersion optical filter (VADOF) [13] with an ultra-wide FOV acquisition scheme to greatly reject the interference from background radiation. In this paper, a fisheye lens generates the ultra-wide acquisition FOV to simplify the system structure and save acquisition time; VADOF with an ultra-narrow-pass bandwidth can effectively suppress background radiation from the fisheye lens.…”

Section: Introductionmentioning

confidence: 99%

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Acquisition probability analysis of ultra-wide FOV acquisition scheme in optical links under impact of atmospheric turbulence

Liu

et al. 2013

Appl. Opt.

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Reliable data transmission in optical wireless communication is on the premise of the successful establishment of the optical link. In this paper, we propose an ultra-wide field-of-view (FOV) acquisition scheme, which combines the fisheye lens and Voigt anomalous dispersion optical filter (VADOF) to achieve rapid establishment of wireless optical links. Furthermore, the ultra-wide FOV signal-receiving model for this acquisition scheme is presented to analyze the receiving performance. This acquisition scheme utilizes the fisheye lens to obtain the ultra-wide FOV, not only simplifying the system architecture of the spatial acquisition, but also reducing the acquisition time; a VADOF with ultra-narrow-pass bandwidth is adopted to resist the strong background radiation induced by the ultra-wide FOV. For this ultra-wide FOV acquisition scheme, the mathematical model of long-term average acquisition probability (LTAAP) is derived based on the gamma-gamma (GG) distribution. In an atmospheric turbulence environment, the average signal count and the acquisition probability are both random variables; therefore, the probability density of the average signal count needs to be considered and LTAAP can be calculated based on the GG distribution. Comprehensive analysis and numerical results of the key parameters of this ultra-wide FOV acquisition scheme, such as LTAAP, false-alarm probability, signal-to-noise ratio, incident angle of beam, scintillation index, and acquisition threshold, provide an advantageous basis for the actual spatial acquisition system.

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Section: B Signal Receiving Model Of the Fisheye Lensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acquisition probability analysis of ultra-wide FOV acquisition scheme in optical links under impact of atmospheric turbulence

Liu

et al. 2013

Appl. Opt.

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“…However, due to the large FOV of the fisheye lens, the imaging system will collect significant background radiation. In our previous work [9], a Voigt anomalous dispersion optical filter (VADOF) [10] with ultra-narrow-pass bandwidth was introduced in this ultra-wide FOV fisheye lens scheme to greatly reduce the interference from background radiation noise, and the acquisition performance was also discussed there.…”

Section: Introductionmentioning

confidence: 99%

High-Accuracy Angle Detection for the Ultrawide FOV Acquisition Scheme in Free-Space Optical Links

Liu

Chen

et al. 2014

J. Lightwave Technol.

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To achieve rapid establishment of free-space optical (FSO) links, we previously proposed an ultrawide field-of-view (FOV) acquisition scheme, which combines the fisheye lens and Voigt anomalous dispersion optical filter. In this paper, we focus on the angle detection accuracy of this ultrawide FOV acquisition scheme, which is one of primary factors for rapid establishment of FSO links. The positioning process is composed of two parts. One is the spot location, which acquires the position of the imaging spot of the incident beam. The other is the mapping from spot location to incident angle, with which the position of imaging spot can be turned into the angles of the incident beam. For the first part, an improved centroid locating algorithm is present to realize the subpixel accuracy of spot location, and theory and simulation are carried out to demonstrate the improved accuracy of this algorithm. For the second part, we propose the fisheye lens calibration algorithm, which integrates the fisheye lens projection model and natural neighbor interpolation algorithm. In addition, by combining with the measured data, the angle detection accuracy of this method can be improved gradually with the increased number of the measured data. The simulation results indicate that this new method can provide high-precision positioning of the laser beams, and the maximum angle detection error of this ultrawide FOV acquisition scheme can be less than 0.054°(0.94 mrad).Index Terms-Fisheye lens calibration, free space optical link, high-accuracy angle detection, spot location, ultrawide field-ofview acquisition. 0733-8724

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“…Our approach is based on theoretical and experimental tech-optic interaction length, and a is the extinction ratio of the polarization analyzer. Magnetically induced optical anisotniques developed in a series of previous studies (15,16,(22)(23)(24)(25)(26).…”

Section: Introductionmentioning

confidence: 99%