Browsing by Author "Chen, Jason (Jyehong)"

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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.
;
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
2.5 dB sensitivity improvement by optimizing the driving voltage of an MZM and electrical filter bandwidth of optical duobinary transmission systems
(2006)
Lu, Yu-Chang
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Wei, Chia-Chien
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Chen, Jason (Jyehong)
;
Tsao, Cheng
;
Chi, Sien
We numerically and experimentally demonstrated that 100% driving voltage doesn't necessarily yield optimal results in duobinary systems. Compared with conventional condition, a 2.5 dB sensitivity improvement is obtained using 3 GHz LPFs with optimum voltage. (C) 2006 Optical Society of America.
28-Gb/s 16-QAM OFDM Radio-over-Fiber System Within 7-GHz License-Free Band at 60 GHz Employing All-Optical Up-conversion
(2009)
Lin, Chun-Ting
;
Wong, Er-Zih
;
Jiang, Wen-Jr
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
A record 28-Gb/s 16-QAM OFDM system within 7-GHz license-free band at 60 GHz employing all-optical up-conversion with frequency quintupling is experimentally demonstrated. Negligible penalty is observed following 100-km SMF transmission without any dispersion compensation. (C)2008 Optical Society of America
31 Gbps RoF System Employing Adaptive Bit-Loading OFDM Modulation at 60 GHz
(2011-01-01)
Ng'oma, Anthony
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Lin, Chun-Ting
;
He, Li-Ying Wang
;
Jiang, Wen-, Jr.
;
Annunziata, Frank
Record wireless data transmission of 31.4 Gbps within 7 GHz license-free band at 60 GHz is experimentally demonstrated using adaptive bit-loading OFDM modulation. Adaptive bit-loading OFDM also enables extended fiber transmission distances beyond 5km.
850-nm VCSELs With p-Type delta-Doping in the Active Layers for Improved High-Speed and High-Temperature Performance
(2016-11)
Chi, Kai-Lun
;
Hsieh, Dan-Hua
;
Yen, Jia-Liang
;
Chen, Xin-Nan
;
Chen, Jason (Jyehong)
In this paper, we study the influence of p-type modulation doping on the dynamic/static performance of highspeed 850-nm VCSELs with highly strained multiple quantum wells. The studied device structure has a 3/2 lambda asymmetric cavity design, which can let the internal transit time of injected carriers be as short as that of 1/2 lambda cavity design and further improve its performance in terms of speed and output power for high single-mode operation. Our proposed VCSEL structure with p-type doping shows superior modulation speed with an output power comparable with that of the un-doped reference device under room temperature operation. Furthermore, when the operating temperature reaches 85 degrees C, there is a significant improvement in both the modulation speed and maximum power of the p-doped structures. According to our simulation, this can be attributed to the change in the quasi-Fermi levels of the injected carriers after the addition of p-doping in the active layers, which minimizes the electron leakage under high-temperature operation.
A continuously tunable and filterless optical millimeter-wave generation via frequency octupling
(2009-10-26)
Lin, Chun-Ting
;
Shih, Po-Tsung
;
Jiang, Wen-Jr
;
Chen, Jason (Jyehong)
;
Peng, Peng-Chun
This work proposes a cost-effective, continuously tunable and filterless optical millimeter-wave (MMW) signal generation employing frequency octupling. Optical MMW signals with 30-dB undesired sideband suppression ratios can be obtained. Since no optical filtering is required, the proposed system can be readily implemented in wavelength-division-multiplexing (WDM) systems. V-band 60-GHz and W-band 80-GHz optical MMW signals are experimentally demonstrated. Because of the high undesired sideband suppression ratio, 60-GHz waveform with 50% duty cycle is observed. The single-sideband (SSB) phase noise of the generated 60-GHz signal is -73 dBc/Hz at 10 kHz. The proposed system is a viable solution for the future ultra-high frequency MMW applications up to 320 GHz using the external modulator with a limited bandwidth of 40 GHz. (C) 2009 Optical Society of America
A Full duplex radio-over-fiber link with Multi-level OFDM signal via a single-electrode MZM and wavelength reuse with a RSOA
(2010-02-01)
Jiang, Wen-Jr
;
Lin, Chun-Ting
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
;
Peng, Peng-Chun
This work demonstrates the feasibility of a full duplex Radio-over-fiber (RoF) link employing multi-level OFDM signal via a single-electrode Mach-Zehnder modulator and wavelength reuse for uplink utilizing a reflective semiconductor optical amplifier (RSOA). A High spectral efficiency 5-Gb/s 16-QAM OFDM signal with frequency multiplication for the RoF downstream link is demonstrated, and negligible penalty is achieved after 25-km standard single mode fiber transmission. Furthermore, wavelength reuse for a 1.25-Gb/s OOK signal via a RSOA for the upstream link is also demonstrated with a receiver penalty of less than 0.5 dB following 25-km SMF transmission. (C) 2010 Optical Society of America
A novel direct detection microwave photonic vector modulation scheme for radio-over-fiber system
(2008-07-01)
Lin, Chun-Ting
;
Dai, Sheng-Peng
;
Chen, Jason (Jyehong)
;
Shih, Po Tsung
;
Peng, Peng-Chun
This letter demonstrates the feasibility of a novel direct detection microwave photonic vector modulation scheme for the radio-over-fiber (RoF) system. Unlike the traditional double-sideband with optical carrier suppression modulation scheme, which can carry only the on-off keying data format, the proposed scheme encodes the electrical vector signal on either the upper sideband (USB) or the lower sideband (LSB) only and a pure optical subcarrier on the other sideband. Therefore, phase and amplitude information will be preserved after direct detection. A frequency doubling scheme is employed to reduce the cost of RoF systems. Additionally, the relative intensity between USB and LSB can be easily tuned by adjusting the individual power of electrical driving signals to optimize the performance of the optical radio-frequency signals. A proof-of-concept experiment is conducted by using a 1.25 Gb/s BPSK signal at a carrier frequency of 20 GHz. After transmission over 50-km single-mode fiber, the receiver sensitivity penalty is less than 0.5 dB.
A Novel Optical Direct-Detection I/Q Up-Conversion with I/Q Imbalance Compensation via Gram-Schmidt Orthogonalization Procedure
(2009)
Jiang, Wen-Jr
;
Lin, Chun-Ting
;
Wong, Er-Zih
;
Shih, Po-Tsung
;
Chen, Jason (Jyehong)
We proposed RF detect-detection vector signal generation using optical I/Q up-conversion. The Gram-Schmidt orthogonalization procedure is employed to compensate I/Q imbalance. After transmission over 100-km SMF, penalties of 5-Gb/s QPSK signals can be ignored.
A Novel Passive Optical Network Architecture Supporting Seamless Integration of RoF and OFDMA Signals
(2010-03-15)
Lin, Yu-Min
;
Tien, Po-Lung
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Yuang, Maria C.
;
Lee, Steven S. W.
;
Chen, Jason (Jyehong)
In this letter, we propose a novel passive optical network (PON) architecture supporting radio-over-fiber signals and orthogonal frequency-division multiple access (OFDMA) PON signals. The architecture transports upstream multiple remote antenna's wireless signals using only one upstream wavelength. In addition, the windowed-orthogonal frequency-division-multiplexing technique is employed to mitigate interference during the integration process. Experimental results shows that 10-Gb/s OFDMA and three radio-frequency signals at 2.1 GHz are successfully transmitted over 20-km single-mode fiber in a 32-optical-network-unit PON.
A W-Band Photonic Transmitter-Mixer Based on High-Power Near-Ballistic Uni-Traveling-Carrier Photodiode (NBUTC-PD) for 1.25-Gb/s BPSK Data Transmission under Bias Modulation
(2009)
Wu, Y. -S.
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Kuo, F. -M.
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Wang, Shao-Ning
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Chen, Nan-Wei
;
Shi, J. -W
We demonstrate W-band photonic transmitters-mixers, which are composed of near-ballistic-uni-traveling-carrier-photodiodes and quasi-Yagi antennas without integrating Si-lens. By utilizing it, data-transmission at W-band can be achieved under bias modulation of 1.25-Gb/s BPSK with 5GHz IF signals. (C) 2009 Optical Society of America
A W-Band Photonic Transmitter-Mixer Based on High-Power Near-Ballistic Uni-Traveling-Carrier Photodiodes for BPSK and QPSK Data Transmission Under Bias Modulation
(2009-08-01)
Shi, Jin-Wei
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Kuo, F. -M.
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Wu, Y. -S.
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Chen, Nan-Wei
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Shih, Po-Tsung
In this study, we demonstrate wireless binary phase-shift keying (BPSK) and quadrature phase-shift keying (QPSK) data transmission at the-band by use of bias modulation on photonic transmitters-mixers, which are composed of near-ballistic uni-traveling-carrier photodiodes and quasi-Yagi antennas without the integration of an Si-lens. By use of such a device and a novel optical millimeter-wave source with octupling optical frequency, we can successfully achieve 1.25-Gb/s BPSK and 0.625-Gb/s QPSK data-transmission at 105 GHz with 5-GHz intermediate-frequency signals.
Add/drop applications in fiber ring networks based on a reconfigurable optical add/drop multiplexer in a re-circulating loop
(2006-11-01)
Huang, Ming-Fang
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Chen, Jason (Jyehong)
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Feng, Kai-Ming
;
Lin, Tse-Yu
;
Lai, Chung-Yu
A periodic add/drop system in a fiber ring network was investigated using a reconfigurable optical add/drop multiplexer (ROADM) in a re-circulating fiber loop. After seven cascaded add/drop nodes at every 150 km along the transmission, at bit error ratio (BER) equals to 10(-9) and data rate of 10 Gbps, we observed a 2.5 dB power penalty for the passing through channels with 1050 km transmission distance, and 0.3 dB sensitivity penalty variation for the periodic add/drop channels at every 150 km, respectively. (c) 2006 Elsevier B.V. All rights reserved.
Convergence of phase fluctuation induced by intrachannel four-wave mixing in differential phase-shift keying transmission systems via phase fluctuation averaging
(2007-05-15)
Wei, Chia Chien
;
Chen, Jason (Jyehong)
;
光電工程學系
;
Department of Photonics
This work investigates the effect of phase fluctuation averaging on phase fluctuation induced by intrachannel four-wave mixing (IFWM) in highly dispersed differential phase-shift keying transmission systems. Through repeatedly averaging the phase fluctuations of adjacent pulses, a simple analytical model and numerical simulation revealed that the IFWM-induced differential phase fluctuation is suppressed and convergent, even after an ultralong transmission. The influence of averaging the phase fluctuations on the bit error rate is also evaluated by the semianalytical method. (c) 2007 Optical Society of America.
Convergence of phase noise in DPSK transmission systems by novel phase noise averagers
(2006-10-16)
Wei, Chia Chien
;
Chen, Jason (Jyehong)
;
光電工程學系
;
Department of Photonics
This investigation proposes a novel all-optical phase noise averager to reduce residual phase noise in the differential phase-shift keying (DPSK) transmission system with phase-preserving amplitude regenerators. The proposed phase noise averager is based on a phase-sensitive amplifier but does not require an extra phase-locking optical pump beam. It can increase the correlation between the phase noises of neighboring bits and greatly reduce the differential phase noise in the transmission system. Independently of the cascaded spans, analytical analysis demonstrates that, in the DPSK system with repeated averagers, the total differential phase noise will be less than that before the first averager. Theoretical analysis and numerical simulation are carried out and confirm the significant improvement of DPSK signals using the proposed novel phase noise averagers. (c) 2006 Optical Society of America
Cost-effective multiservice's hybrid access networks with no optical filter at remote nodes
(2008-05-01)
Lin, Chun-Ting
;
Shih, Po Tsung
;
Chen, Jason (Jyehong)
;
Peng, Peng-Chun
;
Dai, Sheng-Peng
This letter experimentally demonstrates a multi-services hybrid access network integrated radio-over-fiber and fiber-to-the-home systems which share the same distributed architecture. A 1.25-Gb/s baseband signal and a 14.375-GHz radio-frequency (RF) signal with 625-Mb/s binary phase-shift keying data are generated and transmitted employing a commercially available dual-electrode Mach-Zehuder modulator. The proposed scheme offers better performance, has no RF fading issue, can carry vector signals, and requires no optical filter at remote nodes. After transmission over 25-km single-mode fiber, the proposed scheme successfully achieves less than 0.5-dB sensitivity penalties.
Dynamic Characteristics and Linewidth Enhancement Factor of Quantum-Dot Vertical-Cavity Surface-Emitting Lasers
(2009-05-01)
Peng, Peng-Chun
;
Lin, Gray
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Kuo, Hao-Chung
;
Yeh, Chao-En
;
Liu, Jui-Nung
This study explores the relative intensity noise characteristics of quantum-dot vertical-cavity surface-emitting lasers (QD VCSELs). The resonance frequency and eye diagram are presented. The linewidth enhancement factor (alpha factor) of QD VCSEL is also investigated experimentally. The values of alpha factor were measured to be between 0.48 and 0.60. Moreover, a photonic RF phase shifter is examined using the QD VCSEL. A phase shifter with a total phase shift of 2 pi was demonstrated. These investigations and demonstrations will be useful in the field of QD VCSEL.
Effects of filter bandwidth and driving voltage on optical duobinary transmission systems
(2007-07-01)
Lu, Yu Chang
;
Wei, Chia Chien
;
Chen, Jason (Jyehong)
;
Feng, Kai Ming
;
Yeh, Pao Chi
This work demonstrates how electrical driving voltage of a Mach-Zehnder modulator and the bandwidth of electrical low-pass filters (LPFs) affect optical duobinary signals. The fact that a 100% driving voltage does not necessarily yield optimal results in duobinary systems is established both numerically and experimentally. Various filter bandwidths correspond to respective optimum driving voltages. In a 10 Gbps duobinary system, compared with the conventional condition of using a 2.5 GHz electrical LPF, a 2.5 dB sensitivity improvement is obtained by employing a 3 GHz LPF with an 88% driving voltage of fully driving. (c) 2007 Published by Elsevier Inc.
Electrically and Continuously Tunable Optical Delay Line Based on a Semiconductor Laser
(2010)
Wu, Fang-Ming
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Peng, Peng-Chun
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Chen, Jason (Jyehong)
;
Lin, Chun-Ting
;
Lin, Gong-Ru
This investigation experimentally demonstrates the feasibility of the electrically and continuously tunable optical delay line using a semiconductor laser. The time delays for a 10 Gbps data signal are electrically delayed by adjusting the bias current of laser, and the maximum delay is approximately 41 ps. We also measure the bit error rate against the receiver power by various bias currents and wavelength detuning (Delta lambda). Measurements are made to verify the feasibility to use in optical communication systems. (C) 2010 The Japan Society of Applied Physics
Energy Efficient 850 nm Vertical-Cavity Surface-Emitting Lasers with Extremely Low Driving-Current Density for > 40 Gbit/sec Error-Free Transmissions from RT to 85 degrees C
(2015)
Chi, Kai-Lun
;
Jiang, Jia-Wei
;
Yen, Jia-Liang
;
Lu, I-Cheng
;
Kuo, H. -C.
850nm VCSELs with record-low driving-current-density (8kA/cm(2)) small resistance (6012), wide-bandwidth (26GHz), and small energy-to-data-rate ratio (228fJ/bit; 3.5mA) for >41Gbit/sec error-free transmission over 100 (2) meter OM4 fiber at room-temperature (85 degrees C) have been demonstrated. (C) 2014 Optical Society of America