Deflection angle detecting system for the large-angle and high-linearity fast steering mirror using quadrant detector

Ni, Yingxue; Wu, Jiabin; San, Xiaogang; Gao, Shijie; Ding, Shaohang; Wang, Jing; Wang, Tao

doi:10.1117/1.oe.57.2.024110

Cited by 9 publications

(2 citation statements)

References 24 publications

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“…Xin Wu [18] achieved a nonlinearity of 1% in the range of ±1.25 • . YingXue Ni [19] achieved a measurement range of ±2 • and a nonlinearity of 0.72% through specular reflection and QD sensors. ShaoKang Hung [20] established a spot center positional algorithm and realized a measurement of ±10 • and a resolution of 0.0265 • by collecting the spot position through QPD.…”

Section: Introductionmentioning

confidence: 99%

High-Range and High-Linearity 2D Angle Measurement System for a Fast Steering Mirror

Du,

Lv,

Liu

et al. 2023

Sensors

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In order to solve the problem of the insufficient range of the traditional fast mirror (FSM) angle measurement system in practical applications, a 2D large-angle FSM photoelectric angle measurement system based on the principle of diffuse reflection is proposed. A mathematical model of the angle measurement system is established by combining the physical properties of the diffuse reflecting plate, such as the rotation angle, rotation center, rotation radius, reflection coefficient and the radius of the diffuse reflecting surface. This paper proposes a method that optimizes the degree of nonlinearity based on this mathematical model. The system is designed and tested. The experimental results show that changing the diffuse reflection surface area can improve the nonlinearity of the angle measurement system effectively. When the radius of the diffuse reflection surface is 3.3 mm, the range is ±20°, the non-linearity is 0.74%, and the resolution can reach up to 2.3″. The system’s body is simple and compact. It is also capable of measuring a wider range of angles while linearity is guaranteed.

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Section: Introductionmentioning

confidence: 99%

High-Range and High-Linearity 2D Angle Measurement System for a Fast Steering Mirror

Du,

Lv,

Liu

et al. 2023

Sensors

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“…In the latter case the interconnection among both types of transmission channels, air and fiber, must be optimized to avoid signal losses. This optimization includes techniques for reducing the effects of atmospheric turbulence [20], [21] through beam steering/tracking [22], [23] and adaptive optics [24], [25]. However, tracking systems including both types of correction usually require bulky and costly equipment.…”

mentioning

confidence: 99%

Double-Loop Wavefront Tilt Correction for Free-Space Quantum Key Distribution

et al. 2019

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Both free-space and optical fiber quantum key distribution (QKD) links will coexist in future quantum networks, requiring efficient coupling between both types of channels. However, wavefront distortions introduced by the atmospheric channel can severely affect this efficiency. Active mechanisms such as precise beam tracking or steering can correct for some of these wavefront distortions, considerably improving the signal-to-noise ratio of the received quantum signal in many scenarios. A tracking system that uses two, instead oftypically one, controlling loops for tilt correction, stabilizes the beam in the whole optical axis of the receiver relaxing the restrictions of the receiver's optical design, and reduces the area of beam fluctuations in the receiver's focal plane a 24% more than a single-loop configuration. The tracking system was characterized in a QKD system at a 300 meter-link in moderate to strong turbulent conditions (C 2 n − 10 −14 − 10 −13 m −2/3) and an improved coupling efficiency of a factor of 2.1 and 1.6 was obtained for a 9.5 µm-core diameter standard telecommunications Single Mode Fiber (SMF) and a 25 µm-core diameter multimode fiber (MMF), respectively. This reduces the quantum bit error rate (QBER) caused by solar background photons in a 52 % for the former and 39% for the latter, enabling an increase in the secret key rate ofmore than one order ofmagnitude for SMF and a factor of five for MMF. These results are promising for enabling QKD free-space links and their interconnection to fiber optic infrastructure in realistic scenarios of communication networks of high turbulence regimes and daylight conditions. INDEX TERMS Quantum key distribution, beam steering, beam tracking, free-space quantum communication, quantum cryptography, wavefront tilt correction. I. INTRODUCTION Recent research in free-space Quantum Key Distribution (QKD) has focused on increasing the feasibility of practical systems in real scenarios, which implies fulfilling several challenges like increasing the key rate, the propagating distance and making practical systems compact, robust, and low cost [1]-[7]. Many advances on stationary links have been reported in the last few years [8]-[11], whereas other potential scenarios for mobile systems, such as aircrafts [12], hotair balloons [13] and Unmanned Aerial Vehicles (UAVs) [14] have also been explored. In addition, after several tests and proofs to analyze their possibilities, links involving satellites have also been recently demonstrated [15]-[18]. The associate editor coordinating the review of this article and approving it for publication was Wei Huang.

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Design and performance test of the fast-steering mirror with flexure hinge used in vehicle track-launch system

Zhang

Chen

2019

Optoelectron. Lett.

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Deflection angle detecting system for the large-angle and high-linearity fast steering mirror using quadrant detector

Cited by 9 publications

References 24 publications

High-Range and High-Linearity 2D Angle Measurement System for a Fast Steering Mirror

High-Range and High-Linearity 2D Angle Measurement System for a Fast Steering Mirror

Double-Loop Wavefront Tilt Correction for Free-Space Quantum Key Distribution

Design and performance test of the fast-steering mirror with flexure hinge used in vehicle track-launch system

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