Design of a Phase Sensor Applied in the Optical Phase-Locked Loop Based on a High-Speed Coherent Laser Communication System

Liu, Yang; Tong, Shoufeng; Chang, Shuai; Song, Yansong; Dong, Yi; Zhao, Xin; An, Zhe; Yu, Fuwan

doi:10.1109/access.2018.2828026

Cited by 9 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Resolving the doppler shift in a 1550 nm optical downlink is possible through the use of a Costas loop where the expected offset from a 500 km LEO satellite is 4.9 GHz (25 ppm) 3132 . 33 This Dopper-based technique is proposed to improve upon existing orbital determination precision to reduce the link acquisition time, which would allow for more of the satellite pass to be spent downlinking or uplinking data. In the scenario where more than one OGS is within the beam spot, interferometric methods may improve the orbit estimation precision 34 .…”

Section: Orbit Determination By Doppler-based Ranging Of Leo Satellit...mentioning

confidence: 99%

Dual-purpose SDA-compliant optical ground station and laser ranging system concept for satellite applications

Halliwell,

Knudsen,

Mann

2024

Free-Space Laser Communications XXXVI

View full text Add to dashboard Cite

A system for combining laser ranging and high-speed optical communication reception into a single optical system for low-Earth orbit satellite applications at 1550 nm is proposed. This system would enable both optical data reception and ranging to be performed at one location, provided a satellite has both an SDA-compliant optical terminal and infrared retroreflectors on-board. An analysis of the expected returns is provided for both ideal and poor atmospheric conditions. The ranging system is projected to have a single-shot precision of 2.7 cm with sub-mm normal point accuracy pending further analysis. A system concept is presented, utilizing a single telescope and the same adaptive optics. Other methods of orbit determination using optical techniques are also identified. A proof-of-concept system will be considered for payload testing on the University of Alberta AlbertaSat's Ex-Alta 4 cubesat, scheduled for launch in 2027-28.

show abstract

Section: Orbit Determination By Doppler-based Ranging Of Leo Satellit...mentioning

confidence: 99%

Dual-purpose SDA-compliant optical ground station and laser ranging system concept for satellite applications

Halliwell,

Knudsen,

Mann

2024

Free-Space Laser Communications XXXVI

View full text Add to dashboard Cite

show abstract

“…On the contrary, coherent communication system mainly adopts phase modulation/coherent detection mode, which has the advantages of high sensitivity, high modulation rate, and strong anti-interference ability [47]. Phase-shift keying (PSK) modulation belongs to coherent modulation.…”

Section: ) Modulation Modesmentioning

confidence: 99%

A Survey on Laser Space Network: Terminals, Links, and Architectures

Lin

Liu

et al. 2022

IEEE Access

View full text Add to dashboard Cite

Due to the high directionality and short wavelength of laser transmission in space, satellite laser communication can achieve high speed, wide bandwidth, high precision, and high security with no electromagnetic spectrum constraints. It has become a promising direction to construct the laser space network. Recently, relative products, on-orbit demonstrations, and researches have been conducted on laser space networks. Considering this network as a graph, this paper presents a comprehensive survey from nodes, edges, to architectures of this graph, corresponding to laser communication terminals, laser space links, and laser space network architectures. For each content, current achievements are introduced and future trends are analyzed accordingly. Through this survey paper, we aim to present the prospect to develop laser space networks in the next space generation and provide potential research directions to interested researchers or engineers.

show abstract

“…Conventional optical phase-locked loops compensate the phase error by adjusting the oscillating frequency of a local-oscillator (LO) laser [11][12][13]. The phase error is converted into feedback current to control the injection current of LO laser, which induces a laser-frequency shift.…”

Section: Principles Of Phase-error Tracking and Compensationmentioning

confidence: 99%

“…Even if we use a complex DSP algorithm, severe phase errors can remain non-compensated. To reduce the burden of DSP present in a coherent receiver, optical phase-locked loops or Costas loops has been widely applied, which use homodyne optical phase-locked loops [11][12][13]. Nevertheless, a coherent detection at higher symbol rates still requires an off-line DSP [9,10].…”

Section: Introductionmentioning

confidence: 99%

25-km long transmission and real-time detection of 5-GBd/s optical QPSK data using external phase-error compensation

Ha¹,

Won²,

Seo³

2021

Ukr. J. Phys. Opt.

View full text Add to dashboard Cite

We suggest a simple new method for tracking and compensating phase errors. It enables detecting directly optical quadrature-phase shift-keying (QPSK) data after their transmission over more than 10 km, which is far beyond the coherent lengths of typical laser sources. The phase error is extracted by taking the power difference between the in-phase and quadrature-phase signals of the random QPSK data. This error is compensated by simply applying the error signal to a phase modulator located in front of a local oscillator for coherent detection. This direct phase-error compensation enables real-time detection of the QPSK data with no digital signal-processing techniques. As an experimental proof, we demonstrate for the first time a successful transmission of 5 GBd/s QPSK data through a 25-km long standard single-mode fibre. We also show that our phase-error compensation idea can be extended to transmission of wavelength-division multiplexed QPSK data.

show abstract

Design of a Phase Sensor Applied in the Optical Phase-Locked Loop Based on a High-Speed Coherent Laser Communication System

Cited by 9 publications

References 28 publications

Dual-purpose SDA-compliant optical ground station and laser ranging system concept for satellite applications

Dual-purpose SDA-compliant optical ground station and laser ranging system concept for satellite applications

A Survey on Laser Space Network: Terminals, Links, and Architectures

25-km long transmission and real-time detection of 5-GBd/s optical QPSK data using external phase-error compensation

Contact Info

Product

Resources

About