High-Power RF Uni-Traveling-Carrier Photodiodes (UTC-PDs) and Their Applications

Nagatsuma, Tadao; Itô, Hiroshi

doi:10.5772/14800

Cited by 29 publications

(8 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, high tunability of the THz carrier frequency (between 20 GHz -3.8 THz [14][15][16]) is easily achievable using photomixing, thus higher carrier frequencies and, hence, higher data rates are readily achievable in optics-based THz systems. Recent advances in the uni-traveling carrier photodiodes (UTC-PD) based THz photomixers give a new hope for commercial applications of photonics-based THz communication systems [17][18][19][20][21][22]. Such devices offer relatively high powers (~1 mW) even at higher THz frequencies (~300 GHz) [23,24].…”

Section: Introductionmentioning

confidence: 99%

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

et al. 2018

View full text Add to dashboard Cite

Taming the Terahertz waves (100 GHz-10 THz) is considered the next frontier in wireless communications. While components for the ultra-high bandwidth Terahertz wireless communications were in rapid development over the past several years, however, their commercial availability is still lacking. Nevertheless, as we demonstrate in this paper, due to recent advances in the microwave and infrared photonics hardware, it is now possible to assemble high performance hybrid THz communication systems for real-life applications. As an example, in this work, we present design and performance evaluation of the photonics-based Terahertz wireless communication system for the transmission of uncompressed 4K video feed that is built using all commercially available system components. In particular, two independent tunable lasers operating in the infrared C-band are used as a source for generating the Terahertz carrier wave using frequency difference generation in a photomixer. One of the IR laser beams carries the data which is intensity modulated using the LiNbO3 electro-optic modulator. A zero bias Schottky detector is used as the detector and demodulator of the data stream followed by the high-gain and low-noise pre-amplifier. The Terahertz carrier frequency is fixed at 138 GHz and the system is characterized by measuring the bit error rate for the pseudo random bit sequences at 5.5 Gbps. By optimizing the link geometry and decision parameters, an errorfree (BER<10 -10 ) transmission at a link distance of 1m is achieved. Finally, we detail integration of a professional 4K camera into the THz communication link, and demonstrate live streaming of the uncompressed HD and 4K video followed by analysis of the link quality.

show abstract

Section: Introductionmentioning

confidence: 99%

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The bandwidth of the generated noise is determined by the bandwidths of photodiodes and the packaged modules. As photodiodes, we used the uni traveling-carrier photodiodes (UTC-PDs) [8]. The UTC-PD module converts every frequency difference of the ASE noise into THz waves, and finally generates broadband THz noise signals.…”

Section: Photonic Generation Of Teraertz Signalsmentioning

confidence: 99%

Terahertz imaging based on optical coherence tomography

Nagatsuma¹,

Ikeo²,

Nishii³

2013

ICECom 2013

Self Cite

View full text Add to dashboard Cite

Three dimensional (3D) terahertz ( THz) imaging or THz tomography has recently proven to be useful for non-destructive testing of industrial materials and structures. In place of previous imaging techniques such as THz pulse radar, we propose a THz optical coherence tomography ( OCT) using two kinds ofTHz sources such as incoherent noise and frequency-swept sources, and demonstrate 3D imaging in the frequency regions from 300 GHz to 800 GHz.

show abstract

“…[1] Recently, the III-V UTC-PDs have been used in wireless communications, spectroscopic measurement systems, and imaging systems. [2] The main structure difference between the UTC photodiode and the conventional PIN photodiode is that the absorption layer and the space-charge region are separated in the InP/InGaAs UTC-PDs, as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

High bandwidth surface-illuminated InGaAs/InP uni-travelling-carrier photodetector

Li¹,

Xue²,

Li³

et al. 2013

Chinese Phys. B

View full text Add to dashboard Cite

Uni-traveling-carrier photodiodes (UTC-PDs) with ultrafast response and high saturation output are reported. A gradient doping layer and a narrow InP cliff layer were introduced to enhance the saturation and bandwidth characteristics. We measured the dark current, photo response, bandwidth, and saturation current of the fabricated UTC devices. For a 15-µm-diameter device, the dark current was 3.5 nA at a reverse bias of 1 V, and the 3-dB bandwidth was 17.2 GHz at a reverse bias of 5 V, which are comparable to the theoretically values. The maximum responsivity at 1.55 µm was 0.32 A/W. The saturation output current was over 19.0 mA without bias.

show abstract

High-Power RF Uni-Traveling-Carrier Photodiodes (UTC-PDs) and Their Applications

Cited by 29 publications

References 54 publications

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

Terahertz imaging based on optical coherence tomography

High bandwidth surface-illuminated InGaAs/InP uni-travelling-carrier photodetector

Contact Info

Product

Resources

About