林恭如特聘教授的個人資料 - Profile of Gong-Ru Lin

林恭如 Gong-Ru Lin

國立臺灣大學電機工程學系 特聘教授
Distinguished Professor, Department of Electrical Engineering, National Taiwan University

主要研究領域:

奈米矽晶光子學, 光纖雷射, 全光通信訊號處理

Major Research Areas:

Si Nanophotonics, Femtosecond Fiber Lasers, All-Optical Communication Data Processing

研究領域摘要:

1. 飛秒主動與被動鎖模光纖雷射系統(開發超快雷射技術與光電量測通信應用)

 

本研究群探討奈米碳晶、石墨與石墨烯之光學應用,特別是在利用這些奈米或量子結構碳化物半導體作為飽和吸收體,作為被動鎖模光纖雷射的啟動機制進行超短雷射光脈衝的產生與動力學分析。本實驗室也分別以摻鉺光纖與半導體光放大器兩種元件為環型光纖雷射的增益介質,探討達40GHz高重複頻率主動鎖模光纖雷射的基礎特性與各種技術架構,開發光注入鎖模理論建構單模/短脈衝/高重複率的光纖雷射系統。實驗室在光纖雷射系統的指標性成果包括約分諧波鎖模技術、調制光背向注入鎖模理論與技術等,使其可能應用於超快量測、高速光通信、以及材料分析等領域。這個領域研究目前在國內隸屬於前沿雷射光學發展課題。

 

 

 

 

2. 全光通訊信號處理(特殊半導體雷射與光放大器傳輸器在被動光纖網路應用)

 

在光纖通信系統的建構研究中,本實驗室自行設計並開發新穎的弱共振腔半導體雷射二極體,藉由新進研發的自/互回饋或者外部同調光源注入鎖定理論與技術建立下,成功的發展在全光通信系統中訊號格式轉換器、邏輯閘、與決定閘的研究。此一特殊元件特別在光無線通信與毫米波在光纖傳輸的未來應用方面,將因為都會區高密度分波多工被動光纖網路的逐漸普及化,促使其於光纖通信領域分時與分波多工網路介面銜接光路上有極高應用潛力。本實驗室在這方面的研究有相當著墨也與中華電信已有多年之密切合作。

 

 

 

 

3. 奈米矽/碳化矽晶光子技術(奈米矽發光與光波導元件與光互連晶片系統應用)

 

本實驗室專注於開發多樣性奈米矽與碳化矽晶結構之特殊製程,並探討這類四族元素與化合物半導體奈米量子點、奈米角錐、與奈米針狀結構、以及其特殊電學與光學特性之物理機制。我們的目標是發展以奈米矽量子侷限效應為基礎之發光與光電元件,並研究推演其物理模型以及在光互聯系統晶片之可能應用。本研究群已開發超低臨界功率電漿輔助氣相沉積、二氧化碳雷射快速升溫退火、與表面自聚合金屬奈米結晶點等世界首度發表之新穎製程。關於矽與碳化矽奈米量子點的基礎與應用研究,本實驗室長年獲得台積電公司在產學合作研發計畫之補助。

 

 

 

 

本實驗室在光纖雷射、全光通信、與奈米矽晶研究成果重要貢獻:

 

A. 奈米石墨粉體作為飽和吸收體之飛秒級被動鎖模光纖雷射系統

 

B. 重複率10-40GHz諧波/約分諧波鎖模飛秒光纖雷射光固子脈衝壓縮

 

C. 弱腔模寬頻雷射二極體在高密度分波多工被動光纖網路通信領域之應用

 

D. 注入鎖定雷射二極體進行全光OC-192 NRZ/RZ高速通信訊號格式轉換

 

E. 奈米矽與碳化矽晶發光二極體與光波導主動元件之物理機制與效應探討

 

F. 超快光導開關為基礎之毫米波光電式鎖相迴路與相位偏移器之應用

 

 

Research Summary:

    We concentrate our research on developing versatile specific synthesizing processes for Si nanostructures and related devices, investigating the physical mechanisms behind the material, electrical, and optical aspects of the Si nanodots, nanopyramids and nanopillars. The targets are implementing Si nanophotonic devices based on quantum confinement effect, and discuss in more detail the origin of the enhancement on radiation/detection, solar energy conversion, and surface plasmonic resonance at blue-green wavelength region. A future collaboration with Academia Sinica on the ab initio atomic potentials based boundary integral Green function for the quantum computation of Si quantum dots with atomic numbers ranging between 103-104 will be initiated to study the electrical property of Si nanocrystals. These simulations will be helpful to elucidate the carrier transport and penetration between Si nanocrystals and neighborhood dopants, and to realize the surface plasmonic wave interaction between Si nanostructures and biomoleculars. Several featured researches including ultra-low threshold ICP power PECVD synthesis for Si nanopyramids, CO2 laser based rapid thermal annealing for precipitating Si nanocrystals, rapid self-aggregated metallic nanodot array for SPR or nano-lithographical applications will be introduced in the following sections.

     On the other hand, we are interested in fundamental and technical study of fiber laser schemes for potential applications on ultrafast optoelectronic diagnosis, high-speed fiber-optic communications, and biophotonic or biomedical analysis, etc. Over past years, we have constructed several types of continuous-wave and shorted-pulsed Erbium-doped fiber amplifier or semiconductor optical amplifier based fiber ring lasers.  In particular, we have theoretically simulated and experimentally established an optical injection mode-locked semiconductor optical amplifier fiber laser system, which exhibits femtosecond pulsewidth after external soliton compression and facilitates high-repetitive low-supermode-noise output. The other milestones of our works include 40th-oeder rational harmonic mode-locking of EDFL using a FPLD based mode-locker, mutual injection-locked EDFL/EDFL and FPLD link, tipped fiber based low-splicing-loss fusion technology between different fibers, >10GHz backward optical injection induced cross-gain-modulation for mode-locking, etc. In brief, the distinguished researching fields on Si nanophotonics, fiber lasers, and all-optical communication data processing likes are emphasized in our laboratory, which include:

 

A. Nanocrystallite Silicon SiCx, SiNx or SiOx Based LEDs and Solar Energy Photonics

 

 

B. Femtosecond Mode-Locked Fiber Lasers and Soliton Compressors

C. All-Optical OC-192 NRZ/RZ BPSK/OOK Communication Data Format Processing

D. Injection-Locked Laser Diode or Semiconductor Optical Amplifier Based Fiber-Optic WDM-PON

E. Millimeter-wave Optoelectronic Phase-Locked Loops and Phase Shifters

Photo of Gong-Ru Lin

代表性著作 Selected Publication

  1. Gong-Ru Lin, Fan-Shuen Meng, and Yi-Hao Pai, “Manipulative Depolarization and Reflectance Spectra of Morphologically Controlled Nano-pillars and Nano-rods,” Optics Express, Vol. 17, Issue 23, pp.20824-20832, Oct. 2009
  2. Gong-Ru Lin, Tzu-Kang Cheng, Yu-Chieh Chi, Gong-Cheng Lin, Hai-Lin Wang, and Yi-Hung Lin, “200-GHz and 50-GHz AWG channelized linewidth dependent transmission of weak-resonant-cavity FPLD injection-locked by spectrally sliced ASE,” Optics Express, Vol. 17, No. 20, pp. 17739-17746, Sept. 2009
  3. Gong-Ru Lin, Tzu-Kang Cheng, Yi-Hung Lin, Gong-Cheng Lin, and Hai-Lin Wang, “Suppressing Chirp and Power Penalty of Channelized ASE Injection-Locked Mode-Number Tunable Weak-Resonant-Cavity FPLD Transmitter,” IEEE Journal of Quantum Electronics, Vol. 45, No. 9, Sept. 2009
  4. Yi-Hao Pai, Chung-Hsiang Chang, and Gong-Ru Lin, “Composition Optimization and Phase Transformation of Si Nanocrystal Doped SiOx for Enhancing Luminescence from MOSLED,” Journal of Selected Topics in Quantum Electronics, Vol. 15, Issue 5, pp. 1387-1392, Sept. 2009
  5. Gong-Ru Lin, Chung-Lun Wu, Cheng-Wei Lian, and Hung-Chun Chang, “Saturated small-signal gain of Si Quantum Dots embedded in SiO2/SiOx/SiO2 strip-loaded waveguide amplifier made on Quartz,” Applied Physics Letter, Vol. 95, No. 2, 021106, Jul. 2009
  6. Gong-Ru Lin, Hai-Lin Wang, Gong-Cheng Lin, Yin-Hsun Huang, Yi-Hung Lin, and Tzu-Kang Cheng, “Comparison on Injection-Locked Fabry-Perot Laser Diode With Front-Facet Reflectivity of 1% and 30% for Optical Data Transmission in WDM-PON System,” Journal of Lightwave Technology, Vol. 27, No. 14, pp. 779-2785, Jul. 2009
  7. Gong-Ru Lin, Kun-Chieh Yu, and Mu-Chieh Lo, “All-optical RZ data conversion with temporally and spectrally gain-sliced semiconductor optical amplifier via broadband optical injection,” IEEE Journal of Selected Topics in Quantum Electronics, Vol. 14 No. 3, pp. 789-800, Mar. 2008
  8. Gong-Ru Lin, Yi-Hao Pai, and Cheng-Tao Lin, “Microwatt MOSLED Using SiOx With Buried Si Nanocrystals on Si Nano-Pillar Array,” Journal of Lightwave Technology, Vol. 6, No. 11, pp. 1486-1491, Mar. 2008
  9. Chia-Chi Lin, Hao-Chung Kuo, Peng-Chun Peng, and Gong-Ru Lin, “Chirp and error rate analyses of an optical-injection gain-switching VCSEL based all-optical NRZ-to-PRZ converter,” Optics Express, Vol. 16, No. 7, pp. 4838-4847, Mar. 2008
  10. Gong-Ru Lin, C.-L. Pan and Ying-Tsung Lin, “The Effect of Large-mode-Field-Area Erbium-Doped Fiber on Pre-Chirped Femtosecond Amplification and Compression of Mode-Locked Fiber Laser Pulses,” OSA/IEEE Journal of Lightwave Technology, Vol. 25, No. 11, pp. 3597-3601, Nov. 2007
  11. Gong-Ru Lin, Ci-Ling Pan, and Kun-Chieh Yu, “Dynamic chirp control of all-optical format-converted pulsed data from a multi-wavelength inverse-optical-comb injected semiconductor optical amplifier,” OPTICS EXPRESS, Vol. 15, No.20, pp. 13330-13339, Oct. 2007
  12. Gong-Ru Lin, Chun-Jung Lin, and Hao-Chung Kuo, “Improving carrier transport and light emission in a silicon-nanocrystal based MOS light-emitting diode on silicon nanopillar array,” APPLIED PHYSICS LETTERS, Vol. 91, No. 9, pp. 093122, Aug. 2007
  13. Gong-Ru Lin, Kun-Chieh Yu, Ci-Ling Pan, and Yu-Sheng Liao, “All-optical decision-gating of 10-Gb/s RZ data in a semiconductor optical amplifier temporally gain-shaped with dark-optical-comb,” JOURNAL OF LIGHTWAVE TECHNOLOGY, Vol. 25, No. 7, pp. 1651-1658, Jul. 2007
  14. Gong-Ru Lin, Chun-Jung Lin, Hao-Chung Kuo, Huang-Sheng Lin, and Chi-Chiang Kao, “Anomalous microphotoluminescence of high-aspect-ratio Si nanopillars formatted by dry-etching Si substrate with self-aggregated Ni nanodot mask,” APPLIED PHYSICS LETTERS, Vol. 90, No. 14, pp. 143102, Apr. 2007
  15. Gong-Ru Lin, Chun-Jung Lin, and Yia-Chung Chang, “Optical characterization of CO2-laser-ablated Si-rich SiOx,” APPLIED PHYSICS LETTERS, Vol. 90, No. 15, pp. 151903, Apr. 2007
  16. Gong-Ru Lin, Ya-Chung Chang, En-Shao Lin, Hao-Chung Kuo, and Huang-Shen Lin, “ Low refractive index Si nanopillars on Si substrate,” APPLIED PHYSICS LETTERS, Vol. 90, No. 18, pp. 181923, Apr. 2007
  17. Gong-Ru Lin, Ying-Tsung Lin, and Chao-Kuei Lee, “Simultaneous pulse amplification and compression in all-fiber-integrated pre-chirped large-mode-area Er-doped fiber amplifier,” OPTICS EXPRESS, Vol. 15, No. 6, pp. 2993-2999, Mar. 2007
  18. Gong-Ru Lin), Chun-Jung Lin, and Chi-Kuan Lin, “Enhanced Fowler-Nordheim tunneling effect in nanocrystallite Si based LED with interfacial Si nano-pyramids,” OPTICS EXPRESS, Vol. 15, No. 5, pp. 2555-2563, Mar. 2007