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Wood-Hi Cheng

Publications
51
Citations
474
Publications by Year
19812017
Co-Authors:
Show All Co-Authors (112)
Image of author Wood-Hi Cheng

Wood-Hi Cheng

Affiliation

Graduate Institute of Optoelectronic Engineering
National Chung Hsing University
Taichung, Taiwan

Publication Topics

Biography

Wood-Hi Cheng (M'95–A'96–SM'00) was born in Changhua, Taiwan, R.O.C., on June 3, 1944. He received the Ph.D. degree in physics from the Oklahoma State University, Stillwater, in 1978.,From 1978 to 1980, he was a Research Associate with Telecommunication Laboratories, Taiwan. From 1980 to 1984, he was a Research Engineer with General Optronics, Edison, NJ. From 1984 to 1991, he was a Principal Design Engineer with Rockwell International, Newbury Park, CA. From 1991 to 1994, he was an Optoelectronic Packaging Manager with Tacan Corporation, Carlsbad, CA. He is currently a Professor with the Institute of Electro-Optical Engineering, National Sun Yat-sen University, Kaoshiung, Taiwan. He served as a Consultant for Chunghwa Telecom Laboratories,...
Publications
51
Citations
474
Publications by Year
19812017
Co-Authors:
Show All Co-Authors (112)
Author's Published Works

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Packaging high-coupling lasers to polarization maintaining fibers employing visual alignment

Chun-Nien Liu;Wood-Hi Cheng

2017 19th International Conference on Transparent Optical Networks (ICTON)
Year: 2017 | Conference Paper |
An oriented-dependence-microlens (ODM) fabricated by automatic grinding and fusion techniques is proposed. The ODM can be visually surface-feature aligned for high tolerance coupling lasers to polarization-maintaining-fibers (PMFs). The 3-dB coupling efficiency and polarized-extinction-ratio (PER) angular tolerances of the ODM were obtained as high as ± 16°. Furthermore, the 1-dB coupling and PER ...Show More

Packaging high-coupling lasers to polarization maintaining fibers employing visual alignment

Chun-Nien Liu;Wood-Hi Cheng

Year: 2017 | Conference Paper |

Electrical characterization of a 25 Gbit/s VCSEL module with TO-46 form factor packaging

Tien-Tsorng Shih;Pei-Hao Tseng;Jau-Ji Jou;Shun-Shien Chu;Yaw-Dong Wu;Wood-Hi Cheng

2012 17th European Conference on Networks and Optical Communications
Year: 2012 | Conference Paper |
Cited by: Papers (1)
A cost-effective differential-mode packaging of the TO-46 VCSEL module is proposed. The optimal bonding-wire and package solution have been demonstrated through frequency-domain and time-domain simulations. The differential-mode modulation bandwidth of the VCSEL module of above 21 GHz is achieved and a clearly opening eye diagram of 25 Gbit/s is observed. The electrical characterization of the VCS...Show More

Electrical characterization of a 25 Gbit/s VCSEL module with TO-46 form factor packaging

Tien-Tsorng Shih;Pei-Hao Tseng;Jau-Ji Jou;Shun-Shien Chu;Yaw-Dong Wu;Wood-Hi Cheng

Year: 2012 | Conference Paper |

Cr4+:YAG fiber in 40Gb/s C-band transmission system

Pi Ling Huang;Li-Wei Liu;De-Ming Kong;Tsu-Hsiu Wu;Yi-Jen Chiu;Hidenori Taga;Sheng-Lung Huang;Wood-Hi Cheng

16th Opto-Electronics and Communications Conference
Year: 2011 | Conference Paper |
An 86-mm in length 13.5-μm core diameter Cr4+:YAG double cladding crystal fiber(CDF) was performed in a 1550-nm 40-Gb/s error free data transmission system for eye diagram and BER studies.Show More

Cr4+:YAG fiber in 40Gb/s C-band transmission system

Pi Ling Huang;Li-Wei Liu;De-Ming Kong;Tsu-Hsiu Wu;Yi-Jen Chiu;Hidenori Taga;Sheng-Lung Huang;Wood-Hi Cheng

Year: 2011 | Conference Paper |

Carbon natnotubes and graphene saturable absorber for ultrafast laser mode locking

Chao-Yung Yeh;Lain-Jong Li;Shau-Ching Lin;Wood-Hi Cheng

16th Opto-Electronics and Communications Conference
Year: 2011 | Conference Paper |
A passive mode-locking scheme in fiber laser using single wall carbon nanotube (SWCNT) or graphene as saturable absorber (SA) were demonstrated. Stable soliton-like pulses with pulsewidth of 418 fs and spectral linewidth of 6 nm using SWCNT and pulsewidth of 648 fs and spectral linewidth 3.88 nm using graphene as SA were achieved in mode-lock Er-doped fiber ring laser.Show More

Carbon natnotubes and graphene saturable absorber for ultrafast laser mode locking

Chao-Yung Yeh;Lain-Jong Li;Shau-Ching Lin;Wood-Hi Cheng

Year: 2011 | Conference Paper |

A proposal of a low-cost 25-Gb/s differential-end to-46 VCSEL module

Shun-Shien Chu;Pei-Hao Tseng;Tien-Tsorng Shih;Wood-Hi Cheng

16th Opto-Electronics and Communications Conference
Year: 2011 | Conference Paper |
Cited by: Papers (1)
A low-cost differential-end TO-46 VCSEL module is proposed and the electrical performance is demonstrated through frequency-domain and time-domain simulations. The modulation bandwidth achieves 29.18-GHz and a 25-Gb/s eye diagram is clearly shown.Show More

A proposal of a low-cost 25-Gb/s differential-end to-46 VCSEL module

Shun-Shien Chu;Pei-Hao Tseng;Tien-Tsorng Shih;Wood-Hi Cheng

Year: 2011 | Conference Paper |

Improvement fluorescence of Cr4+(Td)/Cr4+(Oh) in Cr-doped YAG crystalline fibers

Yu- Hang Juang;Wei-Lun Wang;Jimmy Wang;Yung Sing Tseng;Wood-Hi Cheng

16th Opto-Electronics and Communications Conference
Year: 2011 | Conference Paper |
We present to improve the fluorescence intensity of Cr4+:YAG crystalline fibers. The difference of dopant oxidation state results in variation of ESCA peaks and helps to identify the sites in which it takes place.Show More

Improvement fluorescence of Cr4+(Td)/Cr4+(Oh) in Cr-doped YAG crystalline fibers

Yu- Hang Juang;Wei-Lun Wang;Jimmy Wang;Yung Sing Tseng;Wood-Hi Cheng

Year: 2011 | Conference Paper |

The efficacy study of Ce:YAG doped low-temperature glass for white LED modules

Wei-Chih Cheng;Shun-Yuan Huang;Chun-Chin Tsai;Jyun-Sian Liou;Ji-hung Chang;Jimmy Wang;Wood-Hi Cheng

16th Opto-Electronics and Communications Conference
Year: 2011 | Conference Paper |
Cited by: Papers (3)
This study investigates the optical characteristics of Ce:YAG - dopant in low-temperature glasses whose glass transition temperatures are around 400°C. The quantum efficacy of 4wt% Ce:YAG doped glass is about 51%.Show More

The efficacy study of Ce:YAG doped low-temperature glass for white LED modules

Wei-Chih Cheng;Shun-Yuan Huang;Chun-Chin Tsai;Jyun-Sian Liou;Ji-hung Chang;Jimmy Wang;Wood-Hi Cheng

Year: 2011 | Conference Paper |

MTTF evaluations of encapsulation materials for LED package in accelerated thermal tests

Jyun-Sian Liou;Chun-Chin Tsai;Wei-Chih Cheng;Shun-Yuan Huang;Gi-Hung Cheng;Jin- Kai Chang;Jimmy Wang;Wood-Hi Cheng

16th Opto-Electronics and Communications Conference
Year: 2011 | Conference Paper |
Cited by: Papers (2)
By the shape parameter and scale parameter of Weibull eq, MTTF could be obtained to provide clear values for comparison and understanding. In this study, glass material exhibits about 7 times better in lumen loss at 150°C.Show More

MTTF evaluations of encapsulation materials for LED package in accelerated thermal tests

Jyun-Sian Liou;Chun-Chin Tsai;Wei-Chih Cheng;Shun-Yuan Huang;Gi-Hung Cheng;Jin- Kai Chang;Jimmy Wang;Wood-Hi Cheng

Year: 2011 | Conference Paper |

Mode-locked lasers using polyurethane dispersed graphene saturable absorber

Shau-Ching Lin;Pi-Ling Huang;Bi-Zen Hsieh;Shr-Hau Huang;Chao-Yung Yeh;Jiang-Jen Lin;Wood-Hi Cheng

16th Opto-Electronics and Communications Conference
Year: 2011 | Conference Paper |
A passive mode-locking fiber laser was demonstrated by using polyurethane-dispersed graphene as the saturable absorber (SA). The result showed that laser pulses with 5nm spectral bandwidth and pulse width about 1ps at wavelength 1560nm were demonstrated. This demonstration indicates that graphene can be a potential material for passive mode-locker for ultrafast laser.Show More

Mode-locked lasers using polyurethane dispersed graphene saturable absorber

Shau-Ching Lin;Pi-Ling Huang;Bi-Zen Hsieh;Shr-Hau Huang;Chao-Yung Yeh;Jiang-Jen Lin;Wood-Hi Cheng

Year: 2011 | Conference Paper |

Effect of sapphire tube assisted in CDLHPG method to fabricate double-clad Cr4+: YAG crystal fiber

K. Y. Huang;K. Y. Hsu;Y. S. Lin;Y. C. Huang;S. L. Huang;Wood-Hi Cheng

2009 14th OptoElectronics and Communications Conference
Year: 2009 | Conference Paper |
An auxiliary sapphire tube assisted to alleviate the fluctuation of the heating power was used in the CDLHPG system for fabricating the more uniform 10-µm-core crystal fibers, the improved core uniformity was demonstrated.Show More

Effect of sapphire tube assisted in CDLHPG method to fabricate double-clad Cr4+: YAG crystal fiber

K. Y. Huang;K. Y. Hsu;Y. S. Lin;Y. C. Huang;S. L. Huang;Wood-Hi Cheng

Year: 2009 | Conference Paper |

A study of the RF characteristics for a coaxial TO-CAN laser module by a 3D full-wave electromagnetic field simulation

Tien-Tsorng Shih;Hao-Wei Chen;Pei-Hao Tseng;Wood-Hi Cheng

2009 14th OptoElectronics and Communications Conference
Year: 2009 | Conference Paper |
A three-dimensional model of electrical performances to substantiate the coaxial TO-can laser module by using the calculated S-parameters from HFSS software is developed. The simulation data is compared with the measured data and shows a good consistency.Show More

A study of the RF characteristics for a coaxial TO-CAN laser module by a 3D full-wave electromagnetic field simulation

Tien-Tsorng Shih;Hao-Wei Chen;Pei-Hao Tseng;Wood-Hi Cheng

Year: 2009 | Conference Paper |

Diffraction property of cholesteric liquid crystal grating

Wen-Chi Hung;Ming-Shan Tsai;I-Min Jiang;Pochi Yeh;Wood-Hi Cheng

2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science
Year: 2008 | Conference Paper |
Diffraction property of cholesteric liquid crystal (CLC) grating has been theoretically and experimentally investigated. The experimental result is in good agreement with the Raman-Nath theoretical diffraction probed by a polarized beam in various polarization states. The dependence on the wavelength and the polarization creates a possibility for externally modulating the CLC device.Show More

Diffraction property of cholesteric liquid crystal grating

Wen-Chi Hung;Ming-Shan Tsai;I-Min Jiang;Pochi Yeh;Wood-Hi Cheng

Year: 2008 | Conference Paper |

Wavefront measurements with large dynamic range on high-power diode lasers

Yu-Kuan Lu;Shyh-Tsong Lin;Szu-Ming Yeh;Wood-Hi Cheng

2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science
Year: 2008 | Conference Paper |
Wavefront measurements with large dynamic range on high-power diode lasers are demonstrated. The wavefront sensor exhibited a large dynamic range of π/2 to -π/2 and high accuracy of the wavefront slope angle of 0.05 degree. The result of this study may provide an accuracy method for measuring the wavefront distributions of the diode lasers and the light sources with large divergence angles, such a...Show More

Wavefront measurements with large dynamic range on high-power diode lasers

Yu-Kuan Lu;Shyh-Tsong Lin;Szu-Ming Yeh;Wood-Hi Cheng

Year: 2008 | Conference Paper |

Decay mechanisms of lumen and chromaticity for high-power phosphor-based white-light-emitting diodes in thermal aging

Yi-Cheng Hsu;Chun-Chin Tsai;Ming-Hung Chen;Yuan-Tsun Lo;Chao-Wei Lee;Wood-Hi Cheng

2008 58th Electronic Components and Technology Conference
Year: 2008 | Conference Paper |
Cited by: Patents (2)
The high-power phosphor-based white-light-emitting diodes (LEDs) with different thicknesses and concentrations of silicone YAG phosphor after thermal aging at 150 degree C and 500 hours are studied experimentally. The results showed that the lumen loss and chromaticity (CIE) blue shift of the high-power white-light LEDs increased as the silicone YAG phosphor thickness and concentration increased. ...Show More

Decay mechanisms of lumen and chromaticity for high-power phosphor-based white-light-emitting diodes in thermal aging

Yi-Cheng Hsu;Chun-Chin Tsai;Ming-Hung Chen;Yuan-Tsun Lo;Chao-Wei Lee;Wood-Hi Cheng

Year: 2008 | Conference Paper |

High electromagnetic shielding of multi-wall carbon nanotube composites using ionic liquid dispersant

Jin-Chen Chiu;Chia-Ming Chang;Jhe-Wei Lin;Wood-Hi Cheng;Yi-Fen Lan;Jiang-Jen Lin

2008 58th Electronic Components and Technology Conference
Year: 2008 | Conference Paper |
A 2.5 Gbps optical transceiver module fabricated by ionic liquid (IL)-dispersed multi-wall carbon nanotube (MWCNT) composites is demonstrated. In comparison with shielding effectiveness (SE) measurements without dispersion, IL-dispersed MWCNT composites exhibited high SE of 40∼46 dB at lower weight percentage of MWCNTs. Ionic charge force and alkyl groups interaction in the IL-MWCNT hybrid solutio...Show More

High electromagnetic shielding of multi-wall carbon nanotube composites using ionic liquid dispersant

Jin-Chen Chiu;Chia-Ming Chang;Jhe-Wei Lin;Wood-Hi Cheng;Yi-Fen Lan;Jiang-Jen Lin

Year: 2008 | Conference Paper |

A new scheme of birefringent optical interleaver employing ring cavity as phase-dispersion element

Chao-Wei Lee;Ruibo Wang;Pochi Yeh;Wood-Hi Cheng

2007 Quantum Electronics and Laser Science Conference
Year: 2007 | Conference Paper |
A new scheme with fewer components and shorter birefringent-crystal length for an optical interleaver using a ring cavity is proposed. A wide 0.5dB passband (0.91 ×bandwidth), a large 25dB stopband (0.78×bandwidth), and a high channel isolation (45dB) are obtained.Show More

A new scheme of birefringent optical interleaver employing ring cavity as phase-dispersion element

Chao-Wei Lee;Ruibo Wang;Pochi Yeh;Wood-Hi Cheng

Year: 2007 | Conference Paper |

Periodic surface plasmon-enhanced diffraction in cholesteric liquid crystal grating

Wen-Chi Hung;Ming-Shun Tsai;Yi-Cheng Juan;I-Min Jiang;Wood-Hi Cheng

2007 Quantum Electronics and Laser Science Conference
Year: 2007 | Conference Paper |
Periodic surface plasmon-enhanced diffraction effect in cholesteric liquid crystal (CLC) grating is demonstrated. The CLC grating is a periodic structure and results in the excitation of a periodic surface plasmon. The surface plasmon-enhanced diffraction effect may be important in nano-optics applications.Show More

Periodic surface plasmon-enhanced diffraction in cholesteric liquid crystal grating

Wen-Chi Hung;Ming-Shun Tsai;Yi-Cheng Juan;I-Min Jiang;Wood-Hi Cheng

Year: 2007 | Conference Paper |

A new architecture for birefringent optical interleaver using a ring resonator as a phase-dispersion element

Chao-Wei Lee;Ruibo Wang;Pochi Yeh;Wood-Hi Cheng

2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference
Year: 2006 | Conference Paper |
Cited by: Papers (1)
A new architecture with less components for an optical interleaver using a ring resonator is proposed. A wide 0.5 dB passband (0.725 times bandwidth), a large 25 dB stopband (0.725 times bandwidth), and a high channel isolation (36 dB) are demonstrated.Show More

A new architecture for birefringent optical interleaver using a ring resonator as a phase-dispersion element

Chao-Wei Lee;Ruibo Wang;Pochi Yeh;Wood-Hi Cheng

Year: 2006 | Conference Paper |

A high electromagnetic immunity plastic composite package for a 10-gb/s optical transceiver module

Tzong-Lin Wu;Min-Ching Lin;Cheng-Wei Lin;Wern-Shiang Jou;Tien-Tsorng Shih;Wood-Hi Cheng

Journal of Lightwave Technology
Year: 2006 | Volume: 24, Issue: 8 | Journal Article |
Cited by: Papers (1)
A high electromagnetic immunity and low-cost plastic package for a 10-Gb/s optical transceiver module is developed by using a woven carbon-fiber epoxy composite (WCEC). The WCEC package with a thickness of 1.0 mm and 4.8% carbon fiber has a shielding effectiveness (SE) performance of 60 dB at 10 GHz as the package is grounded to the system ground, and the SE can reach approximately 38 dB for the r...Show More

A high electromagnetic immunity plastic composite package for a 10-gb/s optical transceiver module

Tzong-Lin Wu;Min-Ching Lin;Cheng-Wei Lin;Wern-Shiang Jou;Tien-Tsorng Shih;Wood-Hi Cheng

Year: 2006 | Volume: 24, Issue: 8 | Journal Article |

High-performance and low-cost 10Gbps coaxial DFB laser module packaging by conventional TO-Can materials and processes

Tien-Tsorng Shih;Min-Ching Lin;Wood-Hi Cheng

56th Electronic Components and Technology Conference 2006
Year: 2006 | Conference Paper |
Cited by: Patents (2)
The high-performance and low-cost 10Gbps coaxial DFB laser module packaging by conventional TO-Can materials and processes are developed and fabricated. The laser module has a built-in matching resistor to reduce the resonant phenomenon. In order to optimize the module's performance, detailed equivalent circuit model is established to investigate both the DFB laser diode and the coaxial package co...Show More

High-performance and low-cost 10Gbps coaxial DFB laser module packaging by conventional TO-Can materials and processes

Tien-Tsorng Shih;Min-Ching Lin;Wood-Hi Cheng

Year: 2006 | Conference Paper |

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