Journal ArticleDOI
120-GHz wireless link using photonic techniques for generation, modulation, and emission of millimeter-wave signals
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TLDR
In this paper, the authors presented a wireless link system that uses millimeter-wave (MMW) photonic techniques, which consists of an optical 120-GHz MMW generator, an optical modulator, and a high-power photonic MMW emitter.Abstract:
We present a wireless link system that uses millimeter-wave (MMW) photonic techniques. The photonic transmitter in the wireless link consists of an optical 120-GHz MMW generator, an optical modulator, and a high-power photonic MMW emitter. A uni-traveling carrier photodiode (UTC-PD) was used as the photonic emitter in order to eliminate electronic MMW amplifiers. We evaluated the dependence of UTC-PD output power on its transit-time limited bandwidth and its CR-time constant limited bandwidth, and employed a UTC-PD with the highest output power for the photonic emitter. As for the MMW generation, we developed a 120-GHz optical MMW generator that generates a pulse train and one that generates a sinusoidal signal. The UTC-PD output power generated by a narrow pulse train was higher than that generated by sinusoidal signals under the same average optical power condition, which contributes to reducing the photocurrent of the photonic emitter. We have experimentally demonstrated that the photonic transmitter can transmit data at up to 3.0 Gb/s. The wireless link using the photonic transmitter can be applied to optical gigabit Ethernet signals.read more
Citations
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Journal ArticleDOI
Review of terahertz and subterahertz wireless communications
John F. Federici,Lothar Moeller +1 more
TL;DR: The goal of this paper is to provide a comprehensive review of wireless sub-THz and THz communications and report on the reported advantages and challenges of using sub-terahertz andTHz waves as a means to transmit data wirelessly.
Journal ArticleDOI
Short-Range Ultra-Broadband Terahertz Communications: Concepts and Perspectives
R. Piesiewicz,Thomas Kleine-Ostmann,N. Krumbholz,Daniel M. Mittleman,Martin Koch,Joerg Schoebel,Thomas Kurner +6 more
TL;DR: It is demonstrated that a directed NLOS path scheme will make a terahertz communication system robust to shadowing, and it is shown that dielectric mirrors covering only parts of the walls will significantly enhance the signal coverage in a typical indoor scenario.
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Terahertz imaging: applications and perspectives
Christian Jansen,Steffen Wietzke,Ole Peters,Maik Scheller,Nico Vieweg,Mohammed Salhi,N. Krumbholz,Christian Jördens,Thomas Hochrein,Martin Koch +9 more
TL;DR: Terahertz (THz) spectroscopy holds large potential in the field of nondestructive, contact-free testing as mentioned in this paper, and the ongoing advances in the development of THz systems, as well as the appearance of the first related commercial products, indicate that large-scale market introduction of THZ systems is rapidly approaching.
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Optical frequency comb technology for ultra‐broadband radio‐frequency photonics
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Journal ArticleDOI
High-speed and high-output InP-InGaAs unitraveling-carrier photodiodes
TL;DR: The unitraveling-carrier photodiode (UTC-PD) as mentioned in this paper utilizes only electrons as the active carriers, which is the key for its ability to achieve excellent high-speed and high-output characteristics simultaneously.
References
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Proceedings ArticleDOI
Uni-traveling-carrier photodiodes
TL;DR: In this paper, a new ultrafast photodiode, uni-traveling-carrier (UTC-PD) was proposed, and its photoresponse characterization on fabricated devices is presented.
Journal Article
InP/InGaAs Uni-Traveling-Carrier Photodiodes
Tadao Ishibashi,Tomofumi Furuta,Hiroshi Fushimi,S. Kodama,Hiroshi Ito,Tadao Nagatsuma,Naofumi Shimizu,Yutaka Miyamoto +7 more
TL;DR: In this article, the operation, design, and performance of the uni-traveling-carrier photodiode (UTC-PD) is reviewed. But the authors do not consider the use of InP/InGaAs as an optoelectronic driver.
Journal ArticleDOI
Design and characterization of a 120-GHz millimeter-wave antenna for integrated photonic transmitters
TL;DR: In this article, a planar slot antenna on an Si substrate for a photonic >100-GHz millimeter-wave (MMW) transmitter was developed by using three-dimensional electromagnetic field simulators and characterized its performance by using an optoelectronic network analyzer.
Journal ArticleDOI
Active mode locking at 50 GHz repetition frequency by half‐frequency modulation of monolithic semiconductor lasers integrated with electroabsorption modulators
TL;DR: In this paper, an active mode locking achieved at a 50 GHz repetition frequency by modulation at half (25 GHz) the cavity resonance frequency using a monolithic mode-locked InGaAsP laser integrated with an electroabsorption modulator is described.
Journal ArticleDOI
2.5 Gbit/s free space optical link over 4.4 km
TL;DR: In this article, a new record in terrestrial free space optical transmission, 2.5 Gbit/s (single channel) over a 4.4 km range is reported, using a specially designed optical telescope-transceiver, a conventional 1550 nm laser transmitter, and a high power optical amplifier.