Browsing by Author "Peng, Peng-Chun"

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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 Delta-Star-Based Multipoint Fiber Bragg Grating Sensor Network
(2011-04-01)
Kuo, Shu-Tsung
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Peng, Peng-Chun
;
Sun, Jen-Wei
;
Kao, Ming-Seng
;
電機工程學系
This work presents a novel delta-star architecture for large-scale multipoint fiber sensor networks with enhanced reconfigurable functionality. Unlike conventional star networks, the proposed network is divided into several delta regions, each containing only one feeder fiber. This delta-star structure significantly reduces the complexity and implementation cost of conventional star networks. A concatenated dual-ring structure with the self-healing function is designed to overcome the star's weakness in reliability. Numerous sensor ring subnets (SRSNs) are utilized to serve a large number of fiber Bragg grating sensors. Delta regions are partitioned upon the criterion of inter-region traffic uniformization; this simplifies the interrogation process and time slot assignment. The reconfigurable function for this multipoint sensor network, which is based on the optical switching technique, is utilized to ensure service continuity when fibers fail. The protection mechanism is illustrated with several multiple link failure cases. Finally, an experimental network is implemented to demonstrate the feasibility and survivability of the proposed sensor network.
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 HYBRID STAR-RING-BUS ARCHITECTURE FOR WDM METROPOLITAN-REGIONAL ACCESS NETWORKS
(2011-01-01)
Kuo, Shu-Tsung
;
Kao, Ming-Seng
;
Peng, Peng-Chun
;
電機工程學系
;
Department of Electrical and Computer Engineering
This work proposes a highly reliable hybrid star ring bus architecture (SRBA) for broadband wavelength division multiplexed (WDM) regional access networks A delta slat network on the top level acts as high capacity Punk infrastructure whose weakness in reliability is overcome by the self healing function of the concatenated ring item ark on the lower level The ling network is divided into several delta regions where the traffic load inside each region is unified to minimize the backup resources required in the network On the bottom loci considerable bus subnets are constructed to serve end users The idea of A bands is introduced to efficiently manage wavelength carriers used in the network Moreover by means of the automatic protection switching (APS) systems in all the optical network units (ONUs) a minimum hop rerouting protection scheme against fiber failure(s) is designed Specifically is e cam out an experimental network to demonstrate the feasibility and survivability of the proposed architecture (C) 2010 Wiley Periodicals Inc Microwave Opt Technol Lett 53 102-108 2011 View this article online at wileyonlinelibrary com DOI 10 1002/mop 25628
A novel direct detection microwave photonic vector modulation scheme for radio-over-fiber system
(2008-07-01)
Lin, Chun-Ting
;
Dai, Sheng-Peng
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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 simple model for cavity enhanced slow lights in vertical cavity surface emission lasers
(2008-04-01)
Chou, Chia-Sheng
;
Lee, Ray-Kuang
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Peng, Peng-Chun
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Kuo, Hao-Chung
;
Lin, Gray
We develop a simple model for the slow lights in vertical cavity surface emission lasers (VCSELs), with the combination of cavity and population pulsation effects. The dependences of probe signal power, injection bias current and wavelength detuning for the group delays are demonstrated numerically and experimentally. Up to 65 ps group delays and up to 10 GHz modulation frequency can be achieved at room temperature at a wavelength of 1.3 mu m. The most significant feature of our VCSEL device is that the thickness of the active region is only several micrometers long. Based on the experimental parameters of quantum dot VCSEL structures, we show that the resonance effect of the laser cavity plays a significant role in enhancing the group delays.
A star-ring-bus architecture for WDM fiber-wireless system
(2006-01-01)
Chiou, Hung-Yu
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Peng, Peng-Chun
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Feng, Kai-Ming
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Peng, Wei-Ren
;
Chen, JyeHong
A self-healing star-ring-bus architecture for high-capacity WDM fiber-wireless system is proposed and verified experimentally. This architecture can provide reliable, flexible, and robust characteristics for large radio terminals. (C) 2006 Optical Society of America.
Adjustable optical signal delay module and method thereof
(2010-03-25)
Chen, Jye Hong
;
Kao, Wei-Che
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Peng, Peng-Chun
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Lin, Chun-Ting
;
Wu, Fang Ming
The present invention relates to an adjustable optical signal delay module, particularly to a module, which adjusts power of an amplified spontaneous emission generated by a semiconductor optical amplifier and reversely feeds the adjusted amplified spontaneous emission back to the semiconductor optical amplifier to vary a group refractive index of the semiconductor optical amplifier and delay the timing of an optical signal, whereby the present invention can replace the pump laser conventionally required by a CPO mechanism. In the present invention, the feedback optical loop comprises a variable optical attenuator, an optical filter, and optical circulators. An user can control the delay timing of optical signals via adjusting optical power in the feedback optical loop. The present invention can decrease the fabrication cost of an optical signal delay module and reduce the volume thereof.
Beyond-Bandwidth Electrical Pulse Modulation of a TO-Can Packaged VCSEL for 10 Gbit/s Injection-Locked NRZ-to-RZ Transmission
(2011-03-15)
Lin, Chia-Chi
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Chi, Yu-Chieh
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Kuo, Hao-Chung
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Peng, Peng-Chun
;
Chang-Hasnain, Connie J.
The parametric characterization of a nonreturn-to-zero (NRZ) to return-to-zero (RZ) data format converter based on the external optical NRZ injection of a TO-46-can packaged vertical-cavity surface-emitting laser (VCSEL) directly modulated by a 10 GHz electrical pulse is demonstrated. The electrical-pulse modulation induced gain switching of the VCSEL is initiated under external optical NRZ data injection that increases the relaxation oscillation frequency of the homemade VCSEL from 2.2 to 7.4 GHz, thereby enabling its electrical modulation bandwidth up to 10 GHz. The external NRZ injection reduces the lasing threshold and enlarges the modulation depth of the VCSEL so that the converted RZ data pulsewidth can be shortened to 27 ps with a slightly increased peak-to-peak negative frequency chirp of 4.3 GHz (corresponding to a chirp parameter of 122 MHz/ps). The chirp and bit error rate (BER) display strong correlations with the injection power and the biased current of the VCSEL. With external injection, the receiving power required for achieving a BER below 10(-9) at 10 Gbit/s is -19.5 dBm, and a power penalty of 16 dB is observed when the dc bias of the electrical-pulse modulated VCSEL is decreased by only 10% from the threshold condition.
Bit-Error-Rate and Chirp analyses of a Gain-Switching VCSEL based All-Optical NRZ-to-RZ Converter
(2008)
Chi, Yu-Chieh
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Lin, Chia-Chi
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Kuo, Hao-Chung
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Peng, Peng-Chun
;
Lin, Gong-Ru
Single-wavelength gain-switching VCSEL based all-optical converter is demonstrated to generate RZ data with 2.5Gbit/s bit-error-rate of 10(-9) at receiving power of -29 dBm and reduced frequency chirp of 178 MHz/ps at input optical NRZ power of -21dBm.
Chirp and error rate analyses of an optical-injection gain-switching VCSEL based all-optical NRZ-to-PRZ converter
(2008-03-31)
Lin, Chia-Chi
;
Kuo, Hao-Chung
;
Peng, Peng-Chun
;
Lin, Gong-Ru
;
交大名義發表
Optically injection-locked single-wavelength gain-switching VCSEL based all-optical converter is demonstrated to generate RZ data at 2.5 Gbit/s with bit-error-rate of 10(-9) under receiving power of -29.3 dBm. A modified rate equation model is established to elucidate the optical injection induced gain-switching and NRZ-to-RZ data conversion in the VCSEL. The peak-to-peak frequency chirp of the VCSEL based NRZ-to-RZ is 4.5 GHz associated with a reduced frequency chirp rate of 178 MHz/ps at input optical NRZ power of -21 dBm, which is almost decreasing by a factor of 1/3 comparing with chirp on the SOA based NRZ-to-RZ converter reported previously. The power penalty of the BER measured back-to-back is about 2 dB from 1 Gbit/s to 2.5 Gbit/s. (c) 2008 Optical Society of America.
Cost-effective multiservice's hybrid access networks with no optical filter at remote nodes
(2008-05-01)
Lin, Chun-Ting
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Shih, Po Tsung
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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.
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)
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Lin, Chun-Ting
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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
Experimental Demonstration of Optical 5-Gb/s 16-QAM OFDM Signal Generation and Wavelength Reuse for 1.25-Gbit/s Uplink Signal
(2008)
Lin, Chun-Ting
;
Jiang, Wen-Jr
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Chen, Jason (Jyehong)
;
Wong, Er-Zih
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Dai, Sheng-Peng
5Gb/s 16QAM OFDM signal for ROF downstream link and 1.25Gb/s OOK signal via RSOA for upstream link are demonstrated. Negligible penalty is observed after 25km SMF.
Experimental Demonstration of Optical Colorless Direct-Detection OFDM Signals with 16-and 64-QAM Formats beyond 15 Gb/s
(2008)
Lin, Chun-Ting
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Dai, Sheng-Peng
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Jiang, Wen-Jr
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Chen, Jason (Jyehong)
;
Lin, Yu-Min
Both highly spectral-efficient direct-detection 15-Gb/s 64-QAM and 20-Gb/s 16-QAM OFDM signals are demonstrated. Negligible penalty is observed following 25-km SMF transmission.
Fast light improvement using periodic bending of erbium-doped fiber
(2008-01-01)
Peng, Peng-Chun
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Kao, Wei-Che
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Lin, Chun-Ting
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Chen, Jason (Jyehong)
;
Shih, Po Tsung
This investigation for the first time, experimentally demonstrates the fast light improvement in an erbium-doped fiber. The time advance is increased over 140 % by the periodic bending of erbium-doped fiber. (C) 2008 Optical Society of America.
Generation of carrier suppressed optical mm-wave signals using frequency quadrupling and no optical filtering
(2008)
Lin, Chun-Ting
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Shih, Po Tsung
;
Chen, Jason (Jyehong)
;
Peng, Peng-Chun
;
Dai, Sheng-Peng
This work demonstrates a novel mm-wave generation using a frequency quadrupling technique. Only one external MZM is used and no optical filter is needed. It provides a simple and inexpensive choice for WDM RoF applications. (C)2008 Optical Society of America.
Generation of direct-detection optical OFDM signal for radio-over-fiber link using frequency doubling scheme with carrier suppression
(2008)
Lin, Chun-Ting
;
Lin, Yu-Min
;
Chen, Jason (Jyehong)
;
Dai, Sheng-Peng
;
Peng, Peng-Chun
This investigation demonstrates the generation of OFDM-RoF signal using frequency doubling. Benchmarked against the OOK format, the 4-Gb/s, 16-QAM OFDM format has four times the higher spectral efficiency with a sensitivity penalty of under 2.6-dB. (c) 2007 Optical Society of America.
Generation of optical millimeter-wave signals and vector formats using an integrated optical I/Q modulator [Invited]
(2009-02-01)
Chen, Jyehong
;
Lin, Chun-Ting
;
Shih, Po Tsung
;
Jiang, Wen-Jr
;
Dai, Sheng-Peng
This study discusses two key technologies used in radio-over-fiber (RoF) systems, namely, the generation and transmission of millimeter-wave signals and optical modulation schemes capable of carrying vector signal formats and utilizing the continuous performance improvements offered by digital signal processing. A cost-effective frequency-quadrupling technique capable of generating millimeter-wave signals up to 72 GHz is proposed. The generated optical millimeter-wave signals have very high quality, with an optical carrier and harmonic distortion suppression ratio exceeding 36 dB. An optical modulation scheme that can support a 64-QAM, 16 Gbits/s orthogonal frequency-division multiplexing RoF system is also demonstrated. Results of this study demonstrate that both methods offer realistic solutions to support future wireless systems. (C) 2009 Optical Society of America