Development of acquisition and tracking sensor for next-generation optical inter-satellite communication

Miyatake, Katsumasa; Fujii, Yuta; Haruna, Masaki; Suzuki, Jun–ichi; Kodeki, Kazuhide; Shiro, Yoshitsugu; Hanada, Tatsuyuki

doi:10.1109/icsos.2011.5783656

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…The power reduction corresponding to the uncertainty angle can be easily calculated from the radiation pattern of the circular aperture of the optical antenna [40]. Considering a residual pointing uncertainty < 10 µrad [35,41,42], the pointing loss can be estimated as 2 dB. In the power budget, we also have to take into account other losses due to non-idealities of the transmitter and the receiver.…”

Section: Loss Budgetmentioning

confidence: 99%

Multi-Static Multi-Band Synthetic Aperture Radar (SAR) Constellation Based on Integrated Photonic Circuits

et al. 2022

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Multi-static SARs from LEO orbits allow the single-pass high-resolution imaging and detection of moving targets. A coherent MIMO approach requires the generation of multi-band, thus orthogonal, signals, the fusion of which increases the system resolution. Up to now the synchronization capability of SAR signals of different satellites is critical. Here, we propose the use of photonics to generate, receive and distribute the radar signals in a coherent multi-static SAR constellation. Photonics overcomes issues in the implementation of MIMO SAR, allowing for the flexible generation of multi-band signals and centralized generation in a primary satellite with coherent distribution to all the secondary satellites of the SAR signals over FSO links. The numerical analysis shows the proposed system has a NESZ < −29.6 dB, satisfying the SAR system requirements. An experimental proof of concept based on COTS, for both signal up- and down-conversion, is implemented to demonstrate the system functionality, showing performance similar to the simulations. The implementation of the proposed systems with integrated technologies could reduce the system SWaP and increase robustness to vibrations. A design based on the consolidated SOI platform with the transfer printing-based hybrid integration of InP semiconductor optical amplifiers is proposed. The amplifiers compensate for the losses of the passive SOI waveguides, decreasing the overall conversion loss. The polarization multiplexing of the modulated and unmodulated combs to be sent from (to) the primary to (from) the secondary satellite over the FSO links avoids complex space-consuming optical filters requiring several control signals.

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Section: Loss Budgetmentioning

confidence: 99%

Multi-Static Multi-Band Synthetic Aperture Radar (SAR) Constellation Based on Integrated Photonic Circuits

et al. 2022

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“…Moreover, the performance results of the control system, which consists of a fine pointing mechanism (FPM) [4] and fine pointing sensor (FPS) [3], are presented. This control system is very important for tracking the laser from the target satellite during communication.…”

Section: Introductionmentioning

confidence: 99%

Development of acquisition and tracking system for next-generation optical intersatellite communication

Shimizu

Kodeki

Miyatake

et al. 2013

2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEOPR)

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One of the key technologies for optical inter-satellite communication equipment is the rapid, highly accurate acquisition and tracking of the corresponding satellite. Therefore, we are developing a prototype of an acquisition and tracking system. This paper describes the specifications and performance test results of the prototype acquisition and tracking system. I. INTRODUCTIONThe emerging development of observation and other low earth orbit (LEO) satellites capable of greatly expanded high-volume data acquisition is expected to increase the need for high-speed data transmission. This need is compounded by the limited time window available for direct communication between an LEO satellite and a ground-based antenna and the resulting requirement for high-volume data transmission. In addition, the size of the RF communication terminal enlarges as the transmission speed increases. We are therefore engaged in the investigation and development of small, lightweight optical communication components that will enable high-speed communication by laser beam between a LEO satellite and a data relay satellite in the geostationary orbit (GEO) (Fig.1) In this paper, the specifications and configuration of the acquisition and tracking system are described. Moreover, the performance results of the control system, which consists of a fine pointing mechanism (FPM) [4] and fine pointing sensor (FPS) [3], are presented. This control system is very important for tracking the laser from the target satellite during communication.

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“…This paper examines the various aspect of the optical intersatellite development. Figures 1 and 2 shows communication by laser beam between a LEO satellite and a data relay satellite in geostationary orbit GEO [1][2].…”

Section: Introductionmentioning

confidence: 99%

High Speed Laser Based Intersatellite Link Systems for Harsh Environment of Space

2019

ATCP

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This paper will focus on the trends for the space-based lasers, optics and terminals used in the intersatellite networks. Reviewed and evaluate the recent development in the space-based laser technologies and the critical parameters that are employed for successful high-speed intersatellite communications systems. Fiber optics and photonics technology including lasers increasingly being used in aerospace applications and many challenges are involved, since designing for aerospace is very different than for the earth environment. Satellites are much more challenging and for their intersatellite solutions have to contemplate more specific requirements such as space radiation attacks, operation in harsh environment of space and achieving weight, power requirements and reliability for space are few to consider. Therefore it is important to design a system to defend against the radiation from ionizing, gamma, and other attacks. There are numerous methods to protect them from radiation, including shielding, error correction, and using radiation resistance shielding and radiation hardening. Building laser for high speed communications network for the harsh environment of space using optical links in space has proven to be complicated task and many such schemes were tried without success in the past. Space-based optical communications using satellites in low earth orbit (LEO) and Geo-synchronous orbits (GEO) hold great promise for the proposed Internet in the Sky network of the future. However in the last few years, there has been impressive progress made to bring the concept of laser-based intersatellite systems to fruition in civilian and government-non classified projects. Laser communications offer a viable alternative to established RF communications for inter-satellite links and other applications where high performance links are a necessity. High data rate, small antenna size, narrow beam divergence, and a narrow field of view are characteristics of laser-based systems and they are just few numbers of potential advantages for system design over radio frequency communication.

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Development of acquisition and tracking sensor for next-generation optical inter-satellite communication

Cited by 5 publications

References 1 publication

Multi-Static Multi-Band Synthetic Aperture Radar (SAR) Constellation Based on Integrated Photonic Circuits

Multi-Static Multi-Band Synthetic Aperture Radar (SAR) Constellation Based on Integrated Photonic Circuits

Development of acquisition and tracking system for next-generation optical intersatellite communication

High Speed Laser Based Intersatellite Link Systems for Harsh Environment of Space

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