Lunar Laser Communication Demonstration in USA: Terminal Design

Tingting, 宋婷婷 Song; Jing, 马晶 Ma; Liying, 谭立英 Tan; Siyuan, 于思源 Yu; Qiwen, 冉启文 Ran

doi:10.3788/lop51.050003

Cited by 5 publications

(2 citation statements)

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“…Reducing the receiving aperture of the telescope is the simplest way to overcome atmospheric turbulence. The United States completed the lunar laser communication demonstration system (LLCD) test in 2013 [ 12 ]. The test verified the equivalent relationship between multi-aperture and large aperture [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Phase Alignment of an Array Optical Telescope System Using Balanced Detection

Wang

Huang

et al. 2023

Micromachines

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Differential phase shift keying (DPSK) modulation and multi-aperture receiving are effective means for suppressing flickering, deviation, and fragmentation of the light spot by atmospheric turbulence. What is challenging in coherent beam combination of such an array receiver system is to detect and compensate for phase deviation of sub-apertures. In this paper, a method of phase alignment of an array optical telescope system using balanced detection was proposed and demonstrated. The improved Mach Zehnder Interferometer (MZI) can demodulate the digital signal and recover the phase difference at the same time. It also brings a 3 dB gain to the receiver and improves the detection sensitivity of the system. Adequate simulations with OptiSystem and MATLAB were carried out to show that the power value remains near the ideal state of 2.75 mW, and the bit error rate is less than 10−9 after phase compensation, which indicates the effectiveness and accuracy of the proposed method. Furthermore, taking the communication interruption difference of ninety degrees as an example, the system bit error rate was reduced from 1 to 10−35, and communication was established again.

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Section: Introductionmentioning

confidence: 99%

Phase Alignment of an Array Optical Telescope System Using Balanced Detection

Wang

Huang

et al. 2023

Micromachines

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“…Free-Space optical (FSO) communication has many advantages such as high bandwidth, licensesfree and robustness to electromagnetic interference, making it an effective alternative to lots of applications [1]- [5], especially to long-haul high-data-rate transmissions [6]- [8]. However, the conditions of the atmospheric channel limit the reliability of FSO links.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of All-Optical Amplify-and-Forward Relaying FSO Communication Systems With OOK and DPSK Modulations

et al. 2018

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All-optical amplify-and-forward (OAF) relaying technique can amplify and filter the attenuated optical signal in optical domain, and thus is regarded as a simple way to extend the transmission distance of free-space optical (FSO) communication systems. At the relaying node, however, the incident background radiation and the amplified spontaneous emission noise of the deployed erbium-doped fiber amplifier will deteriorate the optical signal-to-noise, therefore causing the degradation of the system's bit error ratio (BER). In this paper, we perform simulations and experiments on FSO system with on-off keying (OOK) and differential phase-shift keying (DPSK) signals, focusing on the receiving sensitivity loss (RSL) of the OAF-assisted dual-hop system. Taking the BER level of 10 −7 as the reference, we find that the DPSK system suffers more than 8 dB RSL at the data rate of 5 Gb/s in simulation, while the OOK system gets less than 1 dB RSL at the same data rate. In the following experiments, the obtained results exhibit that RSL of DPSK system is nearly 10 dB, which of OOK system is less than 1.5 dB, shown similarly property to the simulations.

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Optical-Antenna Technologies

2024

Handbook of Optical Wireless Communication

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Lunar Laser Communication Demonstration in USA: Terminal Design

Cited by 5 publications

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Phase Alignment of an Array Optical Telescope System Using Balanced Detection

Phase Alignment of an Array Optical Telescope System Using Balanced Detection

Performance Comparison of All-Optical Amplify-and-Forward Relaying FSO Communication Systems With OOK and DPSK Modulations

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