Preliminary result on laser communication experiment using (ETS-VI)

Arimoto, Yoshinori; Toyoshima, Morio; Toyoda, Masahiro; Takahashi, Tetsuo; Shikatani, Motokazu; Araki, Koji

doi:10.1117/12.207423

Cited by 50 publications

(21 citation statements)

References 1 publication

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“…Since the short-term beam width due to atmospheric turbulence at the satellite can be calculated as rad (FWHM) for the PN mode based on the H-V model in Section II, the measured far-field patterns are in good agreement with the measured data [22]. The broadening of the far-field pattern means the average loss due to the atmospheric turbulence (4) From (4), the atmospheric transmission loss can be plainly distinguished. The atmospheric transmission and turbulence losses are separately tabulated in Table II. For the fading characteristics, the statistical equivalent beam pattern and pointing jitter exist, as can be seen from Fig.…”

Section: Far-field Patterns Of Uplink Beamsmentioning

confidence: 52%

“…Since the early 1960s, many organizations have been studying key technologies to implement such space-based communications systems [2], [3]. Only a few space demonstrations have been made, probably because of remaining risks concerning implementation and budget problems [4]- [6], [7]. 1 Given this situation, it becomes important to design accurate optical link performance based on actual measurements [8]- [12].…”

Section: Introductionmentioning

confidence: 99%

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Long-term statistics of laser beam propagation in an optical ground-to-geostationary satellite communications link

Toyoshima

Shiro

Yamawaki

et al. 2005

IEEE Trans. Antennas Propagat.

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A ground-to-space laser communications experiment was conducted to verify the optical interfaces between a laser communications terminal in an optical ground station and an optical payload onboard a geostationary satellite 38 000 km away. The end-to-end optical characteristics such as intensity, sensitivity, wavelength, polarization, and the modulation scheme of optical signals as well as acquisition sequences of the terminals were tested under fairly good atmospheric conditions. The downlink's bit error rate was on the order of 10 10 in spite of atmospheric turbulence. Atmospheric turbulence-induced signal fading increased the uplink bit error rate, the best value of which was 2.5 10 5 because the turbulent layer near the earth surface affects the uplink signal more than it does the downlink one. The far-field optical antenna patterns were measured through the ground-to-satellite laser links. The long-term statistics of the optical signal data is in good agreement with the calculated joint probability density function due to atmospheric turbulence and pointing jitter error effects, which means the stationary stochastic process can be applied to not only the static link analysis but also the dynamic link performance of the optical communications link. The equivalent broadened optical beam pattern should be used for the fading analysis even though the atmospheric coherence length is larger than the antenna diameter or the optical beam diameter of the transmitter. From these results, a more accurate dynamic link design of the optical communications link can be performed that would be useful for system designers, especially for designers of commercial systems.

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Section: Far-field Patterns Of Uplink Beamsmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Long-term statistics of laser beam propagation in an optical ground-to-geostationary satellite communications link

Toyoshima

Shiro

Yamawaki

et al. 2005

IEEE Trans. Antennas Propagat.

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“…Due to the failure of its apogee engine, it was injected into an elliptical orbit, and it never reached the geostationary earth orbit (GEO). Nevertheless, both uplink and downlink transmissions at wavelengths of 0.514 and 0.830 μm, respectively, and a data rate of 1 Mbps were demonstrated [7]. In 1995, the Jet Propulsion Laboratory (JPL) and NICT conducted a ground-to-space optical communications demonstration called the Ground-to-Orbit Lasercom Demonstration (GOLD) [8].…”

Section: History Of Optical Space Communicationsmentioning

confidence: 98%

System analysis of non-mechanical compact optical transceiver for wireless communications with a VCSEL array

Toyoshima

Miyashita

Takayama

et al. 2008

2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing

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A non-mechanical, compact optical terminal equipped with a two-dimensional laser array is proposed. A laser beam is transmitted by selecting the laser pixel corresponding to the direction of the optical signal received from the counter terminal. The beams are not deflected by a mechanical mirror. Instead, they are turned on and off one after the other in accordance with the direction from which optical signals are received. Multipleinput multiple-output operation is possible in this configuration. The non-mechanical transceiver can facilitate a reduction in the size of the optical system. This paper presents the basic concept of a non-mechanical compact transceiver with a two-dimensional laser array for optical wireless communications.

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“…Existing fiber infrastructure is not suitable for this purpose since classical telecom repeaters cannot relay quantum states [2]. Therefore, optical satellite-to-ground communication [17][18][19][20][21][22] lends itself to bridge intercontinental distances for quantum communication [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. …”

Section: Introductionmentioning

confidence: 99%

Quantum measurements of signals from the Alphasat TDP1 laser communication terminal

Elser

Günthner

Khan

et al. 2017

International Conference on Space Optics — ICSO 2016

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Preliminary result on laser communication experiment using (ETS-VI)

Cited by 50 publications

References 1 publication

Long-term statistics of laser beam propagation in an optical ground-to-geostationary satellite communications link

Long-term statistics of laser beam propagation in an optical ground-to-geostationary satellite communications link

System analysis of non-mechanical compact optical transceiver for wireless communications with a VCSEL array

Quantum measurements of signals from the Alphasat TDP1 laser communication terminal

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