Demonstration of 40  GBaud intradyne transmission through worst-case atmospheric turbulence conditions for geostationary satellite uplink

Conroy, Philip; Surof, Janis; Poliak, Juraj; Calvo, Ramon Mata

doi:10.1364/ao.57.005095

Cited by 19 publications

(11 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since then, terminals for LEO and geostationary satellites have been developed, and numerous links between satellites have been successfully established (more than 20,000 as for early 2019). Although a number of experiments also showed the 512 feasibility of intradyne reception in free-space applications 513 (Conroy et al, 2018;Geisler et al, 2017) between linked frequency references, relayed with low latency via Optical Inter-Satellite Links (OISLs). The overall ensemble signal is then generated on each MEO satellite and it is used to time the navigation payload by steering the local oscillator towards the IEM: this is the technique used to realize the system-wide synchronous broadcast.…”

Section: Coherent Communicationsmentioning

confidence: 99%

Advanced technologies for satellite navigation and geodesy

Giorgi

Schmidt

Trainotti

et al. 2019

Advances in Space Research

View full text Add to dashboard Cite

This manuscript reviews recent progress in optical frequency references and optical communication systems and discusses their utilizations in global satellite navigation systems and satellite geodesy. Lasers stabilized with optical cavities or spectroscopy of molecular iodine are analyzed, and a hybrid architecture is proposed to combine both forms of stabilization with the aim of achieving a target frequency stability of 10 -15 [s/s] over a wide range of sampling intervals.The synchronization between two optical frequency references in real-time is realized by means of time and frequency transfer on optical carriers. The technologies enabling coherent optical links are reviewed, and the development of an optical communication system for synchronization, ranging and data communication in space is described. An infrastructure exploiting the capabilities of both optical technologies for the realization of a modernized constellation of navigation satellites emitting highly synchronized signals is reviewed. Such infrastructure, named Kepler system, improves satellite navigation in terms intra-system synchronization, orbit determination accuracy, as well as system monitoring and integrity. The potential impact on geodetic key parameters is addressed.

show abstract

Section: Coherent Communicationsmentioning

confidence: 99%

Advanced technologies for satellite navigation and geodesy

Giorgi

Schmidt

Trainotti

et al. 2019

Advances in Space Research

View full text Add to dashboard Cite

show abstract

“…Since the fluctuation of the acquired signal directly impacts the optimization process of each plane wave, the analysis is performed for values of SNR ≈ [14,40] and received powers of −60 dBm and −36 dBm, respectively. This range of received power is representative for multi-gigabit data reception, either working with direct detection or coherent systems [19,20], and it corresponds for the APD power range between low and high SNR where the noise has minimal impact in the optimization process.…”

Section: Measurements Proceduresmentioning

confidence: 99%

Proof of concept for adaptive sequential optimization of free-space communication receivers

2019

Self Cite

View full text Add to dashboard Cite

In a down-link scenario, performance of laser satellite communications is limited due to atmospheric turbulence, which causes fluctuations in the intensity and the phase of the received signal leading to an increase in bit error probability. In principle, a single-aperture phase-compensated receiver, based on adaptive optics, can overcome atmospheric limitations by adaptive tracking and correction of atmospherically induced aberrations. However, under strong-turbulence situations, the effectiveness of traditional adaptive optics systems is severely compromised. We have developed an alternative intensity-based technique that corrects the wave-front by iteratively updating the phases of individual focal-plane speckles, maximizing the power coupled into a single-mode fiber. Here, we present the proof of concept for this method. We show how this technique improves the quality of the received signal by 4 dB gain with less than 60 power measurements under strong turbulence conditions.

show abstract

“…Currently, most of the experimental papers about the MPSK FSO communication system were demonstrated by using the fiber-coupling receiver system, e.g., see [7]- [10]. Our team also adopted this system to successfully demonstrate 40 Gb/s and 120 Gb/s differential phase shift keying (DPSK) FSO communication in 2017 and 2018, respectively [11]- [13].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of MPSK FSO Communication Based on the Balanced Detector in a Fiber-Coupling System

Yao

Chen

et al. 2019

IEEE Access

View full text Add to dashboard Cite

An average bit error ratio (ABER) performance model for multiple phase shift keying (MPSK) based on a balanced detector with a fiber is presented in the free-space link for the first time. The Johnson S B probability distribution function (pdf), to the best of our knowledge, is first experimentally explored, which can be used to describe the fading characteristics of an optical signal coupled into a single-mode fiber (SMF) in an atmospheric turbulence channel. Subsequently, an ABER expression is established by combining the photon characteristics of the balanced detector with the fiber. The numerical results show that the system has the most superior ABER performance when the splitting ratio is 0.5 and the quantum efficiency of the two photodetectors is equal. Moreover, the communication performances can be optimized by adjusting parameters, such as increasing the system bandwidth, selecting the appropriate modulation order, and improving the received optical power. Finally, the MPSK-signal-to-noise-ratio (SNR) model is also studied to evaluate system communication performance. Through our asymptotic analysis, if the required ABER falls below the 7% forward error correction (FEC) limit of 3.8 × 10 −3 , the SNR should maintain at least 38 dB or more, while the normalized fluctuation variance deteriorates to 5.2441. This paper provides a parameter reference for designing the MPSK free-space optical (FSO) communication system, especially the fiber-coupling receiver.

show abstract

Demonstration of 40 GBaud intradyne transmission through worst-case atmospheric turbulence conditions for geostationary satellite uplink

Cited by 19 publications

References 14 publications

Advanced technologies for satellite navigation and geodesy

Advanced technologies for satellite navigation and geodesy

Proof of concept for adaptive sequential optimization of free-space communication receivers

Performance Analysis of MPSK FSO Communication Based on the Balanced Detector in a Fiber-Coupling System

Contact Info

Product

Resources

About