Browsing by Author "Shi, J. W."

Now showing 1 - 7 of 7

10 Gb/s optical carrier distributed network with W-band (0.1 THz) short-reach wireless communication system
(2012-10-01)
Chow, C. W.
;
Yang, L. G.
;
Yeh, C. H.
;
Huang, C. B.
;
Shi, J. W.
Millimeter-wave (mm-wave) operated in W-band (75 GHz-0.11 THz) is of particular interests, since this frequency band can carry signals at much higher data rates. We demonstrate a 10 Gb/s optical carrier-distributed network with the wireless communication system. The mm-wave signal at carrier frequency of 0.1 THz is generated by a high speed near-ballistic uni-traveling carrier photodiode (NBUTC-PD) based transmitter (Tx), which is optically excited by optical short pulses. The optical pulse source is produced from a self-developed photonic mm-wave waveform generator (PMWG), which allows spectral line-by-line pulse shaping. Hence these optical pulses have high tolerance to fiber chromatic dispersion. The W-band 10 Gb/s wireless data is transmitted and received via a pair of horn antennas. The received 10 Gb/s data is envelope-detected and then used to drive an optical modulator at the remote antenna unit (RAU) to produce the upstream signal sending back to the central office (CO). 20 km single mode fiber (SMF) error free transmission is achieved. Analysis about the optimum repetition rate of the optical pulse source and the transmission performance of the upstream signal are also performed and discussed. (C) 2012 Elsevier B.V. All rights reserved.
100 GHz ultra-wideband (UWB) fiber-to-the-antenna (FTTA) system for in-building and in-home networks
(2010-01-18)
Chow, C. W.
;
Kuo, F. M.
;
Shi, J. W.
;
Yeh, C. H.
;
Wu, Y. F.
Fiber-to-the-antenna (FTTA) system can be a cost-effective technique for distributing high frequency signals from the head-end office to a number of remote antenna units via passive optical splitter and propagating through low-loss and low-cost optical fibers. Here, we experimentally demonstrate an optical ultra-wideband (UWB) - impulse radio (IR) FTTA system for in-building and in-home applications. The optical UWB-IR wireless link is operated in the W-band (75 GHz - 110 GHz) using our developed near-ballistic unitraveling-carrier photodiode based photonic transmitter (PT) and a 10 GHz mode-locked laser. 2.5 Gb/s UWB-IR FTTA systems with 1,024 high split-ratio and transmission over 300 m optical fiber are demonstrated using direct PT modulation. (C) 2010 Optical Society of America
100 GHz Ultra-wideband Wireless System for the Fiber to the Antenna Networks
(2010)
Chow, C. W.
;
Kuo, F. M.
;
Shi, J. W.
;
Yeh, C. H.
;
Wu, Y. F.
We experimentally demonstrate an optical ultra-wideband (UWB) (75GHz-110GHz) fiber-to-the-antenna (FTTA) system using our developed W-band near-ballistic unitraveling-carrier photodiode (NBUTC-PD) based photonic transmitter (PT). 2.5Gb/s and 1.5Gb/s UWB-FTTA systems with 1,024 high split-ratio are demonstrated. (C)2010 Optical Society of America
Coding for stable transmission of W-band radio-over-fiber system using direct-beating of two independent lasers
(2014-10-20)
Yang, L. G.
;
Sung, J. Y.
;
Chow, C. W.
;
Yeh, C. H.
;
Cheng, K. T.
We demonstrate experimentally Manchester (MC) coding based W-band (75 - 110 GHz) radio-over-fiber (ROF) system to reduce the low-frequency-components (LFCs) signal distortion generated by two independent low-cost lasers using spectral shaping. Hence, a low-cost and higher performance W-band ROF system is achieved. In this system, direct-beating of two independent low-cost CW lasers without frequency tracking circuit (FTC) is used to generate the millimeter-wave. Approaches, such as delayed self-heterodyne interferometer and heterodyne beating are performed to characterize the optical-beating-interference sub-terahertz signal (OBIS). Furthermore, W-band ROF systems using MC coding and NRZ-OOK are compared and discussed. (C) 2014 Optical Society of America
Recent advances in millimeter-wave photonic wireless links for very high data rate communication
(2011)
Pan, C. -L.
;
Chow, C. W.
;
Yeh, C. H.
;
Huang, C. B.
;
Shi, J. W.
To provide integrated and high quality broadband services, higher carrier frequencies are required in wireless communications. Currently, there is a great deal of interests in wireless communications at sub-terahertz or terahertz frequencies, i.e., the millimeter-wave (MMW) or sub-millimeter-wave (sub-MMW). In this work, we will discuss our recent advances in millimeter-wave photonic wireless links for high data rate (10 - 20 Gb/s) communications. The concept of fiber-to-the-antenna (FTTA) system using radio-over-fiber (ROF) technologies will be given in the introduction. Then a design and the structure of the high speed MMW photonic transmitter, namely near-ballistic uni-traveling-carrier photodiode (NBUTC-PD), will be discussed in section 2. In section 3, the operation principle of photonic mm-wave waveform generator (PMWG), which is used to produce the optical pulse train for the photonic transmitter at the antenna-site will be illustrated. We then demonstrate the use of the NBUTC-PD and the PMWG for the downstream and upstream high data rate communications in the W-band.
Recent advances in millimeter-wave photonic wireless links for very high data rate communication
(2012)
Pan, C. -L.
;
Chow, C. W.
;
Yeh, C. H.
;
Huang, C. B.
;
Shi, J. W.
To provide integrated and high quality broadband services, higher carrier frequencies are required in wireless communications. Currently, there is a great deal of interests in wireless communications at sub-terahertz or terahertz frequencies, i.e., the millimeter-wave (MMW) or sub-millimeter-wave (sub-MMW). In this work, we will discuss our recent advances in millimeter-wave photonic wireless links for high data rate (10 20 Gb/s) communications. The concept of fiber-to-the-antenna (FTTA) system using radio-over-fiber (ROF) technologies will be given in the introduction. Then a design and the structure of the high speed MMW photonic transmitter, namely near-ballistic uni-traveling-carrier photodiode (NBUTC-PD), will be discussed in section 2. In section 3, the operation principle of photonic mm-wave waveform generator (PMWG), which is used to produce the optical pulse train for the photonic transmitter at the antenna-site will be illustrated. We then demonstrate the use of the NBUTC-PD and the PMWG for the downstream and upstream high data rate communications in the W-band.
W-band 3.75-Gb/s 8PSK Wireless Signal Generation and Transmission via Optical Frequency Octupling and Bias Modulation of NBUTC-PD with Feed-Forward Equalizer
(2009)
Shih, Po-Tsung
;
Lin, Chun-Ting
;
Huang, Han-Sheng
;
Jiang, Wen-Jr
;
Hsu, Dar-Zu
Generation and transmission of a wireless W-band 8PSK signal with 3.75-Gb/s data rate are experimentally demonstrated. The W-band carrier is generated from millimeter-wave generation with frequency octupling. Bias modulation of a NBUTC-PD is also utilized.