1.55-μm photonic systems for microwave and millimeter-wave measurement

Nagatsuma, Tadao; Shinagawa, Morikazu; Sabri, Nissia; Sasaki, Akira; Royter, Y.; Hirata, Akihiko

doi:10.1109/22.954796

Cited by 49 publications

(16 citation statements)

References 53 publications

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“…It is based on the EO effect and the application of this effect to optical intensity modulation [15], [16]. Furthermore, the synergetic combination of ultrafast photonic measurements [17]- [19] and ultraparallel complementary metal-oxide-semiconductor (CMOS) image sensor technology enables 10 000 parallel measurements of RF signals and realtime display of the acquired image.…”

Section: Principle and Setupmentioning

confidence: 99%

Live Electrooptic Imaging of $W$-Band Waves

Tsuchiya

Sasagawa

Kanno

et al. 2010

IEEE Trans. Microwave Theory Techn.

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A novel method for real-time visual observation of traveling -band waves is described. Wave images and movies are acquired by a live electrooptic imaging (LEI) camera equipped with an optical source that emits signals modulated at a local oscillator (LO) frequency in the -band range. Waves propagating in a slab waveguide made of a semiconductor plate as well as in the air are successfully visualized. Especially in this paper, -band wave images for the aerial propagation in a variety of forms are presented: spherical and plane waves together with some fundamental wave phenomena such as reflection, interference, and diffraction at metal-air interfaces. The principle of 100-GHz optical LO signal generation at the optical wavelength of 780 nm as well as performance parameters such as the spatial resolution, bandwidth, and dynamic range of the camera are discussed. Further, some preliminary applications of the scheme are presented.Index Terms-Electrooptic (EO) effects, imaging, millimeter-wave measurements, millimeter-wave propagation, millimeter-wave radio propagation.

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Section: Principle and Setupmentioning

confidence: 99%

Live Electrooptic Imaging of $W$-Band Waves

Tsuchiya

Sasagawa

Kanno

et al. 2010

IEEE Trans. Microwave Theory Techn.

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“…Compared with the other millimeter-wave (MMW) signal generation techniques [3], although this approach may not offer the highest output power in the sub-THz regime (0.1 to 1 THz), it can provide almost infinite bandwidth for MMW signal generation and delivery due to the characteristics of low-loss and wide optical window of glass fiber. To further improve the O-E bandwidth (~300 GHz) and saturation power (~mW level) of PD thus becomes an important issue to extend the MMW bandwidth of such signal generation scheme for practical application, such as, MMW network analyzer [2], which needs to cover a wide bandwidth (hundreds of GHz) and provide a wide dynamic range [2].…”

Section: Introductionmentioning

confidence: 99%

“…High-power photodiode (PD) based photonic millimeter-wave (MMW) generation technique attracts lots of attention in the recent years due to its application in MMW over fiber communication system [1] and photonic sub-THz measurement system [2]. Compared with the other millimeter-wave (MMW) signal generation techniques [3], although this approach may not offer the highest output power in the sub-THz regime (0.1 to 1 THz), it can provide almost infinite bandwidth for MMW signal generation and delivery due to the characteristics of low-loss and wide optical window of glass fiber.…”

Section: Introductionmentioning

confidence: 99%

Strong Enhancement in Saturation Power of Sub-THz Photodiode by Using Photonic Millimeter-Wave Femtosecond Pulse Generator

Wun

Chen

Lai

et al. 2014

Optical Fiber Communication Conference

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A photonic MMW femto-second pulse-generator has been demonstrated. Using it, we achieve strong (6.4 dB) saturation-power enhancements, which result in +3.9 dBm maximum output of UTC-PD at 160 GHz, as compared to that under sinusoidal excitation.OCIS codes: (320.5540) Pulse shaping, (230.5170) Photodiodes. I. IntroductionHigh-power photodiode (PD) based photonic millimeter-wave (MMW) generation technique attracts lots of attention in the recent years due to its application in MMW over fiber communication system [1] and photonic sub-THz measurement system [2]. Compared with the other millimeter-wave (MMW) signal generation techniques [3], although this approach may not offer the highest output power in the sub-THz regime (0.1 to 1 THz), it can provide almost infinite bandwidth for MMW signal generation and delivery due to the characteristics of low-loss and wide optical window of glass fiber. To further improve the O-E bandwidth (~300 GHz) and saturation power (~mW level) of PD thus becomes an important issue to extend the MMW bandwidth of such signal generation scheme for practical application, such as, MMW network analyzer [2], which needs to cover a wide bandwidth (hundreds of GHz) and provide a wide dynamic range [2].The key point to pursuit the ultimate high speed with high saturation current (power) of PD is to downscale the photo-absorption active area also its depletion layer thickness. However, the large amount of injected optical power results in serious device heating and thermal failure in these miniaturized PDs. An elegant approach in reducing the PD DC output current and device heating is to increase the effective optical modulation depth during fiber delivery through optical signal processing techniques [4-6]. Recently, a higher effective modulation depth as compared to using conventional optical sinusoidal excitation has been achieved using short (~1 ps) optical pulse train with ~100 GHz repetition rate [5]. A 4 dB improvement in output power under the same output photocurrent has been successfully demonstrated in the linear operation mode of PD [5]. Furthermore, due to the reduction in duty cycle under such pulse-mode operation scheme, a significant minimization in device heating and improvement in maximum saturation power may also be expected. However, it becomes more difficult to further narrow down the pulse-width to femto-second regime when the repetition rate of pulse train reaches hundreds of GHz. This is because that the peak optical power of each pulse significantly decreases with the increase of repetition rate of pulse train, which would impede the happening of nonlinear pulse compression process. In this paper, we demonstrate novel photonic MMW sources at 160 GHz using spectral line-by-line pulse shaping technique [6] for power enhancement of MMW signal generations [5]. The line-by-line pulse shaper is capable of generating ~400 fs optical pulse train with tunable repetition-rates multiplied with integer multiples of 20 GHz [6]. By use of this novel optical MMW source, we demonstrate a 6...

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“…With advent of fiber-optic communications technologies, these pulse lasers were replaced with semiconductor lasers and fiber lasers in 1990s, which accelerated the development and commercialization of measurement and testing instruments for high-speed integrated circuits (ICs) [4], [5]. Also in early 1990s, terahertz (THz) spectroscopy [6] and imaging [7] techniques using THz pulses were developed, which made a great impact on the THz research as a trigger of its boom [8], [9].…”

Section: Introductionmentioning

confidence: 99%

Photonics for Millimeter-Wave and Terahertz Sensing and Measurement

Nagatsuma

Hisatake

Pham

2016

IEICE Trans. Electron.

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SUMMARYThis paper describes recent progress of photonicallyenabled systems for millimeter-wave and terahertz measurement applications. After briefly explaining signal generation schemes as a foundation of photonics-based approach, system configurations for specific applications are discussed. Then, practical demonstrations are presented, which include frequency-domain spectroscopy, phase-sensitive measurement, electric-field measurement, and 2D/3D imaging.

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1.55-μm photonic systems for microwave and millimeter-wave measurement

Cited by 49 publications

References 53 publications

Live Electrooptic Imaging of $W$-Band Waves

Live Electrooptic Imaging of $W$-Band Waves

Strong Enhancement in Saturation Power of Sub-THz Photodiode by Using Photonic Millimeter-Wave Femtosecond Pulse Generator

Photonics for Millimeter-Wave and Terahertz Sensing and Measurement

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