Hyperbola–parabola primary mirror in Cassegrain optical antenna to improve transmission efficiency

Zhang, Li; Chen, Lu; Yang, Huajun; Jiang, Ping; Mao, Shengqian; Caiyang, Weinan

doi:10.1364/ao.54.007148

Cited by 24 publications

(2 citation statements)

References 9 publications

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“…Furthermore, the removal of the secondary mirror benefits not only the integration but also thoroughly avoids the energy loss (about 25%) caused by the central obstruction of the secondary mirror. Thus, the transmission efficiency can be remarkably improved without designing intricate optical antennae [10,11].…”

Section: Discussionmentioning

confidence: 99%

Omnidirectional emission from micro-notched Bragg fiber

Caiyang¹,

Yang²,

Jiang³

et al. 2019

Laser Phys. Lett.

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A micro-notched Bragg fiber is proposed as a simplified method to achieve omnidirectional emission. The output beam can retain Gauss-like distribution when the size of the notch is appropriate. Simulation results show that the width and the depth of the notch significantly affect the features of the radial beam, such as the divergence angle and output energy. According to the result that the initial phase can directly control the phase of the output beam, the notched Bragg fiber is suggested as being suitable for simplifying a Cassegrain optical antenna system, and making up for the energy loss (about 25%) caused by the central obstruction of the secondary mirror.

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Section: Discussionmentioning

confidence: 99%

Omnidirectional emission from micro-notched Bragg fiber

Caiyang¹,

Yang²,

Jiang³

et al. 2019

Laser Phys. Lett.

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“…In recent years, Cassegrain antenna with simple structure and easy manufacturing has been widely studied in Free-space optical communication [1][2][3][4], but the transmission efficiency is reduced due to the energy loss caused by the reflection of secondary reflector of Cassegrain antenna [5,6]. In order to improve the transmission efficiency of antenna, some researchers have designed off-axis antennas [7], while others have chosen to optimize the primary and secondary mirrors [8][9][10]. But they also have the disadvantage of complex surface processing.…”

Section: Introductionmentioning

confidence: 99%

Cassegrain antenna using anomalously hollow beams with orbital angular momentum to improve transmission efficiency

Wang,

Yang,

Jiang

et al. 2023

Preprint

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In order to solve the transmission problem of severe energy loss in the center of the Cassegrain antenna, an anomalously hollow beam with orbital angular momentum is innovatively considered, and the transmission characteristics of anomalously hollow beams with different parameters through the Cassegrain antenna in free space is studied. The anomalously hollow beam with orbital angular momentum is a special kind of vortex light, which can maintain good parallelism over long distance transmission. By adjusting the focal parameters of Cassegrain antenna, the beam radius can be expanded in different degrees. In addition, the hollow beam can be applied to the wavelength range of 500 ~ 1550 nm and maintain good performance of parallelism. The result shows that the anomalously hollow beam with orbital angular momentum has a divergence angle of 0.228 μrad, and the beams transmission efficiency of the Cassegrain antenna can reach 89.33% at the wavelength of 863 nm, which can significantly improve the transmission efficiency of the antenna.

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