Ultra-broadband
 
 K
 a
 
 to
 W
 -band1.55 µm travelling-wave photomixer

Stöhr, A.; Heinzelmann, R.; Kaczmarek, Cezary; Jäger, D.

doi:10.1049/el:20000706

Cited by 24 publications

(11 citation statements)

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“…9. Distributed structures are divided into (a) (b) traveling-wave PDs [37,38], and (c) periodically loaded traveling-wave (or velocity-matched distributed) PD [39].…”

Section: Structure Designmentioning

confidence: 99%

High‐power RF photodiodes and their applications

Nagatsuma

Itô

Ishibashi

2009

Laser & Photonics Reviews

155

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There has been an increasing interest in photonic generation of RF signals in the millimeter-wave (30 GHz ∼ 300 GHz) and/or terahertz-wave (0.1 THz ∼ 10 THz) regions, and photodiodes play a key role in it. This paper reviews recent progress in the high-power RF photodiodes such as UniTraveling-Carrier-Photodiodes (UTC-PDs), which operate at these frequencies. Several approaches to increasing both the bandwidth and output power of photodiodes are discussed, and promising applications to broadband wireless communications and spectroscopic sensing are described.Photodiode chip is bonded to the substrate with the antenna. This is a symbolic figure of RF photonics in this article. Antenna Photodiode Light RF signal

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“…9. Distributed structures are divided into (a) (b) traveling-wave PDs [37,38], and (c) periodically loaded traveling-wave (or velocity-matched distributed) PD [39].…”

Section: Structure Designmentioning

confidence: 99%

High‐power RF photodiodes and their applications

Nagatsuma

Itô

Ishibashi

2009

Laser & Photonics Reviews

155

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“…Because of its unique features, photonic synthesizers are applicable for broadband wireless communications [2], radio-astronomy [3], and millimeter-wave imaging [4]. Since the performance of a photonic synthesizer is strongly related to the invention of high-frequency and highoutput power photodetectors, those types of millimeter-wave photonic components are also being studied intensively [5,6] in order to enhance the available output power levels at millimeter-wave frequencies.…”

Section: Introductionmentioning

confidence: 99%

Wideband photonic millimeter-wave synthesizer using a high-power pin waveguide photodiode

Stöhr

Weiß

Malcoci

et al. 2007

2007 European Microwave Conference

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We present a frequency-tunable photonic millimeterwave synthesizer based upon optical heterodyning. The photonic synthesizer consists of a wavelength-tunable two-mode laser setup, a high-power pin photodetector and a millimeter-wave (Wband) limiting amplifier. The key component of the synthesizer is the high-power waveguide pin photodiode featuring a WR10 waveguide output port. The photodiode exhibits a flat frequency response in the W-band and provides millimeter-wave output power levels up to -4.88dBm. The developed photonic synthesizer can be continuously tuned over the entire W-band from 69-112GHz and within that frequency range it offers an extremely flat response with power fluctuations below 3dB. The synthesizer's total frequency-tunability is 50GHz and its output power can be linearly adjusted from about -35dBm to 0dBm.

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“…Recently, lots of researches have been done in this aspect including direct modulation [1] of the laser, external modulation [2] and optical heterodyne modulation [3][4][5] . Phase modulation [6] is one kind of external modulation techniques. In such a system, there will be no need of bias voltage, complicated control circuits and the float current brought by the use of bias voltage, therefore, the phase modulation system can provide better robustness and simplified structure than traditional external intensity modulation method.…”

mentioning

confidence: 99%

Simulation of mm-wave signal generation using phase modulation in ROF system

Zhang

Xin

et al. 2009

Optoelectron. Lett.

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The generation of optical millimeter waves via the improved phase modulator in a RoF system and the transmission character of the signal are theoretically investigated. A new phase modulating scheme is proposed, in which the sidebands are separated by wave length demultiplexer and one of them doesn't feed digital signals, thereby the phase wake-off is restrained.The broadband wireless telecommunication is becoming the main research aspect of the future telecommunication. ROF (radio over fiber) telecommunication technique combines optical fiber with the high frequency radio, thus the broadband wireless communications in 40-60 GHz access can be realized. The generation of millimeter-wave is the key technique of ROF system. Recently, lots of researches have been done in this aspect including direct modulation [1] of the laser, external modulation [2] and optical heterodyne modulation [3][4][5] . Phase modulation [6] is one kind of external modulation techniques. In such a system, there will be no need of bias voltage, complicated control circuits and the float current brought by the use of bias voltage, therefore, the phase modulation system can provide better robustness and simplified structure than traditional external intensity modulation method. In this paper a new phase modulation scheme is proposed based on the theoretical analysis and simulation.The principle of phase modulation is shown in Fig.1.We use the sinusoidal signal without attenuation to describe the signal source and optical light source applied to As shown in formula (1), the power of optical carrier will spread to first-order, second-order, third-order and other higher-order optical sidebands. The amplitude of each sideband is controlled by the parameter of bessel function. After the even harmonics conversion, the output of the phase modulator is described by formula (2),where C is a constant related to A c and the responsivity of the photodetector. After the subcarrier suppression by the FBG filter, the output signal of the filter can be described by formula (3),(1) the modulator. The output wavefront of the phase modulator can be described by formula (1) n m c n c out n t n J A t E 2 ) ( cos ) ( ) ( ) cos( ) ( 0 t J c .(3)

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Ultra-broadband K _a to W -band1.55 µm travelling-wave photomixer

Cited by 24 publications

References 1 publication

High‐power RF photodiodes and their applications

High‐power RF photodiodes and their applications

Wideband photonic millimeter-wave synthesizer using a high-power pin waveguide photodiode

Simulation of mm-wave signal generation using phase modulation in ROF system

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Ultra-broadband K a to W -band1.55 µm travelling-wave photomixer

Cited by 24 publications

References 1 publication

High‐power RF photodiodes and their applications

High‐power RF photodiodes and their applications

Wideband photonic millimeter-wave synthesizer using a high-power pin waveguide photodiode

Simulation of mm-wave signal generation using phase modulation in ROF system

Contact Info

Product

Resources

About

Ultra-broadband K _a to W -band1.55 µm travelling-wave photomixer