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- [21] Experimental Study on the In-Band Amplified Spontaneous Emission in the Single-Mode Continuous-Wave Yb-Doped Fiber Amplifier Operating near 980 nmPHOTONICS, 2022, 9 (06)Li, Zhaode论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China State Key Lab Pulsed Power Laser Technol, Changsha 410073, Peoples R China Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaZhou, Shangde论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China State Key Lab Pulsed Power Laser Technol, Changsha 410073, Peoples R China Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaLiu, Aimin论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China State Key Lab Pulsed Power Laser Technol, Changsha 410073, Peoples R China Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaCao, Jianqiu论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China State Key Lab Pulsed Power Laser Technol, Changsha 410073, Peoples R China Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaHuang, Zhihe论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China State Key Lab Pulsed Power Laser Technol, Changsha 410073, Peoples R China Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaChen, Jinbao论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China State Key Lab Pulsed Power Laser Technol, Changsha 410073, Peoples R China Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China
- [22] 2 W, 1.5 μm single-mode fiber methane Raman laser pumped by a Yb-doped fiber amplifierOPTICS EXPRESS, 2024, 32 (07) : 12419 - 12427Pei, Wenxi论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaLei, Luohao论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaShi, Jing论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaLi, Xuanxi论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaHuang, Wei论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaLi, Zhixian论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaZhou, Zhiyue论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R ChinaWang, Zefeng论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China Natl Univ Def Technol, Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Peoples R China Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China
- [23] Multimode to single-mode conversion of a Yb-doped fiber amplifier with a photorefractive Rh:BaTiO3 crystalApplied Physics B, 2001, 72 : 789 - 791A. Brignon论文数: 0 引用数: 0 h-index: 0机构: Thales,J.-P. Huignard论文数: 0 引用数: 0 h-index: 0机构: Thales,E. Lallier论文数: 0 引用数: 0 h-index: 0机构: Thales,
- [24] 5.5 W monolithic single-mode fiber laser and amplifier operating near 976 nmFIBER LASERS XIII: TECHNOLOGY, SYSTEMS, AND APPLICATIONS, 2016, 9728Aleshkina, Svetlana S.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, Russia Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaLikhachev, Mikhail E.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, Russia Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaLipatov, Denis S.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Inst Hugh Pur Subst, 49 Tropinin St, Nizhnii Novgorod 603950, Russia Lobachevsky State Univ Nizhni Novgorod, 23 Prospekt Gagarina, Nizhnii Novgorod 603950, Russia Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaMedvedkov, Oleg I.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, Russia Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaBobkov, Konstantin K.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, Russia Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaBubnov, Mikhail M.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, Russia Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, RussiaGuryanov, Alexei N.论文数: 0 引用数: 0 h-index: 0机构: Russian Acad Sci, Inst Hugh Pur Subst, 49 Tropinin St, Nizhnii Novgorod 603950, Russia Russian Acad Sci, Fiber Opt Res Ctr, 38 Vavilov St, Moscow 119333, Russia
- [25] Multimode to single-mode conversion of an Yb-doped fiber amplifier with a photorefractive Rh:BaTiO3 crystalPHOTOREFRACTIVE EFFECTS, MATERIALS AND DEVICES, PROCEEDINGS, 2001, 62 : 95 - 95Brignon, A论文数: 0 引用数: 0 h-index: 0机构: Thales, Cent Rech Lab, F-91404 Orsay, France Thales, Cent Rech Lab, F-91404 Orsay, FranceHuignard, JP论文数: 0 引用数: 0 h-index: 0机构: Thales, Cent Rech Lab, F-91404 Orsay, France Thales, Cent Rech Lab, F-91404 Orsay, FranceLallier, E论文数: 0 引用数: 0 h-index: 0机构: Thales, Cent Rech Lab, F-91404 Orsay, France Thales, Cent Rech Lab, F-91404 Orsay, France
- [26] Multimode to single-mode conversion of a Yb-doped fiber amplifier with a photorefractive Rh:BaTiO3 crystalAPPLIED PHYSICS B-LASERS AND OPTICS, 2001, 72 (06): : 789 - 791Brignon, A论文数: 0 引用数: 0 h-index: 0机构: Thales, Cent Rech Lab, F-91404 Orsay, France Thales, Cent Rech Lab, F-91404 Orsay, FranceHuignard, JP论文数: 0 引用数: 0 h-index: 0机构: Thales, Cent Rech Lab, F-91404 Orsay, France Thales, Cent Rech Lab, F-91404 Orsay, FranceLallier, E论文数: 0 引用数: 0 h-index: 0机构: Thales, Cent Rech Lab, F-91404 Orsay, France Thales, Cent Rech Lab, F-91404 Orsay, France
- [27] Theoretical and experimental research on the ∼980-nm Yb-doped fiber laserOPTICAL ENGINEERING, 2016, 55 (07)Wang, Yanshan论文数: 0 引用数: 0 h-index: 0机构: China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Inst Appl Elect, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R ChinaKe, Weiwei论文数: 0 引用数: 0 h-index: 0机构: China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China Inst Appl Phys & Computat Math, 6 Huayuan Rd, Beijing 100088, Peoples R China China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R ChinaMa, Yi论文数: 0 引用数: 0 h-index: 0机构: China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Inst Appl Elect, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R ChinaSun, Yinhong论文数: 0 引用数: 0 h-index: 0机构: China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Inst Appl Elect, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Grad Sch, 6 Huayuan Rd, Beijing 100088, Peoples R China China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R ChinaFeng, Yujun论文数: 0 引用数: 0 h-index: 0机构: China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Inst Appl Elect, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China China Acad Engn Phys, Grad Sch, 6 Huayuan Rd, Beijing 100088, Peoples R China China Acad Engn Phys, Key Lib Sci & Technol High Energy Laser, 64 Mianshan Rd, Mianyang 621900, Sichuan, Peoples R China
- [28] Bound States of Dissipative Solitons in the Single-Mode Yb-Doped Fiber LaserIEEE PHOTONICS JOURNAL, 2016, 8 (02):He, Xin论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China Shaanxi Engn Technol Res Ctr Solid State Lasers &, Xian 710069, Peoples R China NW Univ Xian, Prov Key Lab Photoelect Technol, Inst Photon & Photon Technol, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R ChinaHou, Lei论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China Shaanxi Engn Technol Res Ctr Solid State Lasers &, Xian 710069, Peoples R China NW Univ Xian, Prov Key Lab Photoelect Technol, Inst Photon & Photon Technol, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R ChinaLi, Mengmeng论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China Shaanxi Engn Technol Res Ctr Solid State Lasers &, Xian 710069, Peoples R China NW Univ Xian, Prov Key Lab Photoelect Technol, Inst Photon & Photon Technol, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R ChinaGuo, Hongyu论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China Shaanxi Engn Technol Res Ctr Solid State Lasers &, Xian 710069, Peoples R China NW Univ Xian, Prov Key Lab Photoelect Technol, Inst Photon & Photon Technol, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R ChinaLu, Baole论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China Shaanxi Engn Technol Res Ctr Solid State Lasers &, Xian 710069, Peoples R China NW Univ Xian, Prov Key Lab Photoelect Technol, Inst Photon & Photon Technol, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R ChinaChen, Haowei论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China Shaanxi Engn Technol Res Ctr Solid State Lasers &, Xian 710069, Peoples R China NW Univ Xian, Prov Key Lab Photoelect Technol, Inst Photon & Photon Technol, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R ChinaQi, Xinyuan论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Dept Phys, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R ChinaBai, Jintao论文数: 0 引用数: 0 h-index: 0机构: NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China Shaanxi Engn Technol Res Ctr Solid State Lasers &, Xian 710069, Peoples R China NW Univ Xian, Prov Key Lab Photoelect Technol, Inst Photon & Photon Technol, Xian 710069, Peoples R China NW Univ Xian, Dept Phys, Xian 710069, Peoples R China NW Univ Xian, Natl Key Lab Photoelect Technol & Funct Mat, Inst Photon & Photon Technol, Culture Base, Xian 710069, Peoples R China
- [29] 322W single-mode Yb-doped all-fiber laser operated at 1120 nmAPPLIED PHYSICS EXPRESS, 2014, 7 (05)Zhang, Hanwei论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R ChinaXiao, Hu论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R ChinaZhou, Pu论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R ChinaZhang, Kun论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R ChinaWang, Xiaolin论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R ChinaXu, Xiaojun论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China
- [30] Large-mode-area multicore Yb-doped fiber for an efficient high power 976 nm laserOPTICS EXPRESS, 2021, 29 (14): : 21992 - 22000Li, Huizi论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, SingaporeZang, Jichao论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, SingaporeRaghuraman, Sidharthan论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, SingaporeChen, Shaoxiang论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, SingaporeGoel, Charu论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, SingaporeXia, Nan论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore论文数: 引用数: h-index:机构:Yoo, Seongwoo论文数: 0 引用数: 0 h-index: 0机构: Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore Nanyang Technol Univ, Ctr Opt Fibre Technol, Sch Elect & Elect Engn, Photon Inst, 50 Nanyang Ave, Singapore 639798, Singapore