Browsing by Author "Shi, J. -W."

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12.5-Gb/s Wireless Data Transmission by Using Bias Modulation of NBUTC-PD Based W-Band Photonic Transmitter-Mixer
(2010)
Kuo, F. -M.
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Yen-Lin, Ho
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Shi, J. -W.
;
Chen, Nan-Wei
;
Jiang, Wen-, Jr.
We demonstrated near-ballistic uni-traveling-carrier photodiode based broadband photonic transmitter-mixers with quasi-Yagi radiators fed horn antennas. 100GHz wireless transmission with date rate as high as 12.5-Gb/s via bias modulation under high photocurrent (20mA) has been achieved. (C)2009 Optical Society of America
Cascade Laser Power Converter for Simultaneous 10 Gbps Data Detection and Efficient Optical-to-Electrical DC Power Generation
(2011-01-01)
Kuo, F. -M.
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Lo, S. -S.
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Pan, Ci-Ling
;
Shi, J. -W.
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物理研究所
We demonstrate a novel device; cascade high-speed laser power converter. Error-free 10 Gbit/sec data detection and 21.1% optical-to-electrical DC power generation efficiency can be achieved simultaneously at 850nm wavelength and +1V voltage. (C) 2011 Optical Society of America
Characterization of a Sub-THz Photonic Transmitter Based on a Sep arated-Tran sp o rt-Recombin ation Photodiode
(2007)
Shi, J. -W.
;
Li, Yu-Tai
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Pan, Ci-Ling
;
Chiu, C. -H.
;
Liu, W. -S.
By incorporating low-temperature-grown GaAs based separated-transport-recombination photodiode with micromachined antenna, such photonic-transmitter can radiate strong sub-THz waves at designed frequency (similar to 500GHz) without using Si-lens. Problems of device saturation under high bias voltage were also eliminated. (C) 2005 Optical Society of America
Characterization of sub-THz photonic-transmitters based on CaAs-AlGaAs uni-traveling-carrier photodiodes and substrate-removed broadband antennas for impulse-radio communication
(2008-07-01)
Li, Yu-Tai
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Shi, J. -W.
;
Huang, Cheng-Yu
;
Chen, Nan-Wei
;
Chen, Shu-Han
A novel photonic transmitter for wireless terahertz (THz) impulse-radio (IR) communication is realized by monolithic integration of a GaAs-AlGaAs-based uni-traveling-carrier (UTC) photodiode with a substrate-removed broadband antenna. The device can radiate strong sub-THz pulses (20-mW peak-power) with a narrow pulsewidth (< 2 ps) and wide bandwidth (100 similar to 250 GHz). The maximum average power emitted by our device, under the same THz time-domain spectroscopic setup, is around ten times higher than that of the low-temperature-grown GaAs-based photoconductive antenna, while with a much lower dc bias (9 versus 35 V). The bias-dependent peak output powers of our devices suggest their suitability for application as a data modulator/emitter for photonic THz IR communication.
Distinct Dynamic Behaviors of High-Power Photonic-Transmitters Based on Uni-Traveling Carrier and Separated-Transport-Recombination Photodiodes
(2009)
Li, Yu-Tai
;
Yang, Chan-Shan
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Pan, Ci-Ling
;
Shi, J. -W.
;
Huang, C. -Y.
We demonstrate two high-performance photonic-transmitters based on uni-traveling-carrier-photodiode (UTC-PD) and separated-transport-recombination-photodiode (STR-PD). Thanks to recombination center, STR-PD exhibits comparable maximum-peak-power and electrical pulse-width with much smaller photocurrents and less serious device-heating to those of UTC-PD.
Phosphor-free GaN-based transverse junction light emitting diodes for the generation of white light
(2006-11-01)
Shi, J. -W.
;
Huang, H. -Y
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Wang, C. -K.
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Sheu, J. -K.
;
Lai, W. -C.
We demonstrate a GaN-based phosphor-free near-white-light light-emitting-diode (LED) structure that operates in the visible wavelengths and offers broadening and flattening optical bandwidth performance. The incorporation of GaN-based dual wavelengths (blue and green) multiple-quantum-wells with a transverse p-n junction produces a device which can directly generate stable and near visible white-light emissions. The shape of the optical spectra (440-560 nm) are invariable from low to very high levels of bias currents. The problems of nonuniform carrier distribution and bias dependent electrolumineseence. spectra that occur in traditional phosphor-free white-light or near-white-light LEDs (with vertical p-n junctions) are eliminated by the demonstrated structure.
Photonic Impulse-Radio Wireless Link at W-Band Using a Near-Ballistic Uni-Traveling-Carrier Photodiode-Based Photonic Transmitter-Mixer
(2010-01-15)
Kuo, F. -M.
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Li, Yu-Tai
;
Shi, J. -W.
;
Wang, Shao-Ning
;
Chen, Nan-Wei
A W-band photonic transmitter-mixer, constructed by integrating a planar quasi-yagi radiator for feeding the WR-10 waveguide-based horn antenna and a near-ballistic uni-travelingcarrier photodiode, is used with a mode-locked fiber laser to obtain 2.5-Gb/s impulse-radio (IR) wireless data transmission at around a center frequency of 100 GHz. The bias-modulation technique provides less jitter and a longer maximum transmission distance compared with the technique of modulating the optical pulse train using an electrooptics modulator. Using the bias-modulation technique, we achieve a 2.5-Gb/s IR wireless data transmission.
Sub-THz Photonic-Transmitters Based on GaAs/AlGaAs Uni-Traveling Carrier Photodiode and Micromachined Circular Disk Monopole Antenna for Ultra-wideband Communication
(2008)
Li, Yu-Tai
;
Pan, Ci-Ling
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Shi, J. -W.
;
Huang, Cheng-Yu
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Chen, Nan-Wei
By incorporating GaAs/AlGaAs based uni-traveling-carrier photodiodes with broadband micromachined monopole antennas, the demonstrated photonic-transmitter can radiate strong sub-THz pulses (20mW peak-power) with a wide bandwidth (100 similar to 250GHz), which was measured by another photonic-receiver for ultra-wideband communication. (c) 2008 Optical Society of America
W-Band Vector Signal Generation via Optical Millimeter-wave Generation and Direct Modulation of NBUTC-PD
(2009)
Shih, Po-Tsung
;
Lin, Chun-Ting
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Jiang, Wen-Jr
;
Wong, Er-Zih
;
Chen, Jason (Jyehong)
The generation of optical millimeter-wave with frequency 8-tupling is experimentally demonstrated. 625-Mb/sec QPSK data transmission at 105-GHz (W-band) is achieved for the first time using the millimeter-wave generation technique and direct modulation of a NBUTC-PD. (C)2009 Optical Society of America
W-Band Wireless Data Transmission by the Integration of a Near-Ballistic Unitraveling-Carrier Photodiode With a Horn Antenna Fed by a Quasi-Yagi Radiator
(2009-11-01)
Kuo, F. -M.
;
Shi, J. -W.
;
Wang, Shao-Ning
;
Chen, Nan-Wei
;
Shih, Po-Tsung
We demonstrate a novel W-band photonic transmitter mixer, which is composed of a planar quasi-Yagi radiator for feeding a WR-10 waveguide-based horn antenna and a near-ballistic unitraveling-carrier photodiode. The module demonstrates reasonable coupling loss in terms of the millimeter-wave (MMW) power launched from the integrated radiator into the WR-10 waveguide. With the bias-modulation technique and an optical MMW source, we can successfully achieve a wireless data transmission of 2.5-Gb/s quadrature phase shift keying at a carrier wave frequency of 102.5 GHz with a transmission distance of over 2.3 m.