Journal Publications:

2017

[1]    D. Guo, T. Chu*, “Silicon mode (de)multiplexers with parameters optimized using shortcuts to adiabaticity”, Optics Express 25(8), 9160-9170(2017);

[2]       S. Yu, T. Chu*, “Electrical nonlinearity in silicon modulators based on reversed PN junctions”, Photonics Research 5(2), 124-128(2017);

[3]       L. Qiao, W. Tang, T. Chu*, “32 × 32 silicon electro-optic switch with built-in monitors and balanced-status units”, Scientific Reports 7, 42306(2017);

2014

[1]    Tong Ye, Yunfei Fu, Lei Qiao, and Tao Chu*, “Low-crosstalk Si arrayed waveguide grating with parabolic tapers,” Optics Express 22(26), 31899-31906 (2014).

[2]       Yunfei Fu,Tong Ye,Weijie Tang,Tao Chu*: “Efficient adiabatic silicon-on-insulator waveguide taper”. Photonics Research, 2(3): A41-A44.(2014);

2013

[1]       X. Li, X. Xiao, H. Xu, Z. Li, T. Chu, J. Yu, and Y. Yu: “Mach-Zehnder-based five-port silicon router for optical interconnects” Optics Letters, 38, 10, pp. 1703-1705, (2013);

[2]       X. Li, X. Xiao, H. Xu, Z. Li, T. Chu, J. Yu, Y. Yu: “Highly Efficient Silicon Michelson Interferometer Modulators”, Photonics Technology Letters, IEEE , 25, 5, pp.407-409, (2013);

[3]       X. Xiao, H. Xu, X. Li, Z. Li, T. Chu, Y. Yu, and J. Yu: “High-speed, low-loss silicon Mach-Zehnder modulators with doping optimization”, Optics Express, 21, pp.4116-4125, (2013);

[4]       C. Zhang, J. Sun, X. Xiao, W. Sun, X. Zhang, T. Chu, J. Yu, Y. YU: “High Efficiency Grating Coupler for Coupling between Single-Mode Fiber and SOI Waveguides”, Chinese Physics Letter, 30, 1, pp.014207-1-4, (2013);

[5]       X. Xiao, Z. Li, T. Chu, H. Xu, X. Li, N Anastasia , K. Xiong, Y. Yu and J. Yu: “Development of Silicon Photonic Devices for Optical Interconnects”, SCIENCE CHINA Technological Sciences 56(3), pp.586-593, (2013);

2012

[1]       Y. Hu, X. Xiao, H. Xu, X. Li, K. Xiong, Z. Li, T. Chu, Y. Yu, and J. Yu: “High-speed silicon odulator based on cascaded microring resonators”, Optics Express, 20, pp. 15079-15085, (2012);

[2]       H. Xu, X. Xiao, X. Li, Y. Hu, Z. Li, T. Chu, Y. Yu, and J. Yu: “High speed silicon Mach-Zehnder modulator based on interleaved PN junctions”, Optics Express, 20, 14, pp. 15093-15099, (2012);

[3]       X. Xiao, H. Xu, X. Li, Y. Hu, K. Xiong, Z. Li, T. Chu, Y. Yu, and J. Yu: “25 Gbit/s silicon microring modulator based on misalignment-tolerant interleaved PN junctions”, Optics Express, 20, pp. 2507-2515, (2012);

[4]   X. Xiao, X. Li, H. Xu, Y. Hu, K. Xiong, Z. Li, T. Chu, J. Yu, and Y. Yu: “44-Gbit/s Silicon Microring Modulators based on Zigzag PN Junctions”, Photonics Technology Letters, IEEE, 24, 19, pp.1712-1714, (2012);

[5]   Y. Hu, L. Zhou, X. Xiao, Z. Li, Y. Li, T. Chu, Y. Su, Y. Yu, and J. Yu: “An ultra-high-speed photonic temporal differentiator using cascaded SOI micro-ring resonators”, Journal of Optics, 14, 7, pp. 065501-1-8, (2012) ;

[6]   K. Xiong, X. Xiao, X. Li, Y. Hu, Z. Li, T. Chu, Y. Yu, J. Yu: “Modeling and analysis of silicon-on-insulator elliptical microring resonators for future high-density integrated photonic circuits”, Chinese Physics B, 21,7, pp. 074203-1-6, (2012);

[7]   K. Xiong, X. Xiao, X. Li, Y. Hu, Z. Li, T. Chu, Y. Yu, J. Yu: “CMOS-compatible reconfigurable microring demultiplexer with doped silicon slab heater”, Optics Communications, 285, pp. 4368-4371, (2012);

[8]   N. Anastasia, X. Xiao, B. Yang, T. Chu, Y. Yu, and J. Yu: “Design and Characterization of a Top Cladding for Silicon-on-Insulator Grating Coupler”, Chinese Physics Letter. 29, 11, pp. 114213-1-3, (2012);

[9]   Z. Li, L. Zhou, T. Chu, Y. Yu, J. Yu: “Improved extinction ration of Mach-Zehnder based optical modulators on CMOS platform”, Frontiers of Optoelectronics, 5, 1, pp. 90-93, (2012);

Before 2010

[1]   N. Fujioka, T. Chu, and M. Ishizaka: ^“Compact and Low Power Consumption Hybrid Integrated Wavelength Tunable Laser Module Using Silicon Waveguide Resonators”, Journal of Lightwave Technology, 28, 21,, pp. 3115-3120, (2010);

[2]   T. Chu*, N. Fujioka, and M. Ishizaka: ^“Compact, Low Power Consumption  Wavelength Tunable Laser with Silicon Photonic-wire Waveguide Micro-ring Resonators”, Optics Express, 17, pp. 14063-14068, (2009);

[3]   T. Chu*, H. Yamada, S. Nakamura, M. Ishizaka, M. Tokushima, Y. Urino, S. Ishida, and Y. Arakawa: “Ultra-small silicon photonic wire waveguide devices”, (invited paper), IEICE Transactions on Electronics, , Vol. E92-C, No. 2, pp. 217-223 (2008);

[4]   H. Yamada, T. Chu, S. Ishida, and Y. Arakawa: “Si photonic wire waveguide devices”, (invited paper), IEICE Transactions on Electronics, Vol. E90-C, pp.59-64, (2007);

[5]   A.Gomyo, J. Ushida, T. Chu, H. Yamada, S. Ishida, and Y. Arakawa: “A Highly efficient optical add-drop multiplexer using photonic band gap with hexagonal lattice air-hole PC slab waveguides”, IEICE Transactions on Electronics, (invited paper), Vol. E90-C, pp. 65-71 (2007);

[6]   H. Yamada, A. Gomyo, J. Ushida, T. Chu, S. Ishida, and Y. Arakawa: “Photonic crystal devices and Integrated circuits for photonic network systems”, (invited paper), IEICE Transactions on Communications, Vol. J90-C, pp. 53-59, (2007), in Japanese.

[7]   T. Chu*, H. Yamada, A. Gomyo, J. Ushida, S. Ishida, and Y. Arakawa: “Tunable optical notch filter realized by shifting the photonic band gap in a silicon photonic crystal line-defect waveguide”, Photonics Technology Letters, IEEE, 18, pp.2614-2616 (2006);

[8]   T. Chu*, H. Yamada, S. Ishida, and Y. Arakawa: “Tunable optical add-drop multiplexer based on silicon photonic wire waveguides”, Photonics Technology Letters, IEEE, 13, pp. 1409-1411, (2006);

[9]   H. Yamada, T. Chu, S. Ishida, and Y. Arakawa: “Si photonic wire optical waveguide devices”, Journal of Selected Topics in Quantum Electronics on Silicon Photonics, IEEE, 12, pp.1371-1379, (2006);

[10]   T. Chu*, H. Yamada, S. Ishida, and Y. Arakawa: “Thermo-optic switch based on photonic-crystal line-defect waveguides”, Photonics Technology Letters, IEEE, 17, pp. 2083-2085,(2005);

[11]   T. Chu*, H. Yamada, S. Ishida, and Y. Arakawa: “Compact 1×N thermo-optic switches based on silicon photonic wire waveguides”, Optics Express 13, pp. 10109-10114 (2005);

[12]   H. Yamada, T. Chu, S. Ishida, and Y. Arakawa: “Optical add-drop multiplexers based on Si-wire waveguides”, Applied Physics Letters, 86, pp. 191107_1-190007_3, (2005);

[13]   H. Yamada, T. Chu, S. Ishida, and Y. Arakawa: “Optical directional coupler based on Si-wire waveguides”, Photonics Technology Letters, IEEE, 17, pp. 585-587, (2005);

[14]   H. Yamada, M. Shirane, T. Chu, S. Ishida, Y. Arakawa and H. Yokoyama: “Nonlinear-optic Si-wire waveguide with strong optical field confinement”, Japanese Journal of Applied Physics, pp. 6541-6545, (2005);

[15]   M. Yamada, N. Zui, and T. Chu: “Defect-induced birefringence in crystalline silicon ingots,” European Physical Journal-Applied Physics. 27, pp.155-158, (2004);

[16]   T. Chu*, M. Yamada, J. Donecker, M. Rossberg, V. Alex and H. Riemann: “Optical anisotropy in dislocation-free silicon single crystals,” Microelectronic Engineering, pp.327-332, (2003);

[17]   T. Chu*, M. Yamada, J. Donecker, M. Rossberg, V. Alex, and H. Riemann: “Optical anisotropy and strain-induced birefringence in dislocation-free silicon single crystals,” Materials Science and Engineering B, pp.174-177, (2002);

[18]   M. Yamada, and T. Chu: “Microscopic observation of strain induced in heteroepitaxial layers with reflection type of infrared polariscope,” Journal of Crystal Growth, 210, pp.102-106, (2000);

[19]   T. Chu*, and M. Yamada: “Photoelastic Measurement of Strain Induced by Die-bonding of GaAs Chip on a Copper Heatsink Plate,” Japanese Journal of Applied Physics. pp. 1153-1155, (1999);

Invited talk and selected conference papers:

[1]    Sheng Yu, Yadong Liu, and Tao Chu*, “Highly linear silicon Mach-Zehnder modulators with optimized phase-shifter”, in the 2017 International Topical Meeting on Microwave Photonics (MWP2017)，Beijing/China, 2017, paper: Mo2.4;

[2]    Yadong Liu, and Tao Chu*, “High-speed Packaging for silicon modulator”, in The 7th International Multidisciplinary Conference on Optofluidics (IMCO2017)，Singapore, 2017;

[3]    Defen Guo and Tao Chu*,“Polarization splitter-rotators with optimized taper structures”(invited)”in The 7th International Multidisciplinary Conference on Optofluidics (IMCO2017)，Singapore, 2017;

[4]    Defen Guo, Yejin Zhang, and Tao Chu* ,“Mode multiplexers with tapers based on shortcuts to adiabaticity”, in 2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2017)，Singapore, 2017;

[5]    Tao Chu*,“Active/Passive Photonic Components and Circuits on Silicon”(invited),”in 14th International Conference on Group IV Photonics (IEEE-GFPIV 2017)，Berlin/Germany, 2017, paper: WE;

[6]    Tao Chu*,“Silicon Photonic Devices for HPC and DC Applications” (invited),”in International Symposium on Photonics and Optical Communications (ISPOC 2017)，Sendai/Japan;

[7]    Tao Chu*,“Silicon Photonic Devices”(invited),” in JSAP-OSA Joint Symposia 2017，Fukuoka/Japan, 2017,paper: E 6p-A410-6;

[8]    Tao Chu*, “Large scale Silicon Photonic Switches”(invited),” in Transmission and Switching Techniques for Data Centers workshop of the Asia Communications and Photonics Conference 2017 (ACP2017)，Guangzhou/China, 2017;

[9]    Tao Chu*, “Electro-photonic Integration Technologies”(invited)”, in Industry Forum: Advances and Trends of Photonics Integration of the Asia Communications and Photonics Conference 2017 (ACP2017)，Guangzhou/China, 2017;

2016

[1]    L. Qiao, W. Tang, T. Chu*, “Large-scale silicon optical switches for optical interconnection”, in the Nanophotonics and Micro/Nano Optics III, (SPIE/COS, Beijing, 2016), paper: 1002705.

[2]       W. Wu, T. Lin, T. Chu*, and H. Zhang, “CMOS-Compatible High Efficiency Polarization Splitting Grating Coupler near 1310nm”, (online) in the Asia Communications and Photonics Conference (OSA, Wuhan, 2016), paper: AS2F.4;

[3]       Y. Fu, K. Li, W. Wu, W. Tang, T. Chu, Y. Wang, and Z. Fu, “Low-Cost, Compact Optical Time-Domain Reflectometer Based on Silicon Oxynitride Waveguides”, (online) in the Asia Communications and Photonics Conference (OSA, Wuhan, 2016), paper: AF2A.71;

[4]       T. Ye, T. Chu*, “Low-Loss and Low-Crosstalk Si Etched Diffraction Gratings with Multi-Point Iterative Optimization”, (oral) in the 13th International Conference on Group IV Photonics (GFP, Shanghai, 2016), paper: ThD5;

[5]       L. Qiao, W. Tang, T. Chu*, “Ultra-Large-Scale Silicon Optical Switches”, (oral) in the 13th International Conference on Group IV Photonics (GFP, Shanghai, 2016), paper: WB1;

[6]      S. Yu, T. Chu*, “Study of Electrical Nonlinearity in Analog Silicon Modulator” in the Conference on Lasers and Electro-Optics: Science and Innovations. (CLEO, CA/USA, 2016) JW2A. 119;

[7]       L. Qiao, W. Tang,.T. Chu*, “16x16 Non-blocking Silicon Electro-optic Switch Based on Mach-Zehnder Interferometers”, in the Optical Fiber Communication Conference and Exposition/National Fiber Optic Engineers Conference, (OFC/NFOEC, CA/USA, 2016), paper: Th1C.2;

2015

[1]    T. Chu*, “Silicon photonics”, (invited) in the 7th International Conference on Information Optics and Photonics, (CIOP, Nanjing, 2015), paper:20150712-20150715.

[2]       T. Chu*, “Silicon photonic devices for high speed photonic interconnections”, (invited) in Applied Optics and Photonics China,  (AOPC, Beijing, 2015), paper: 20150505-20150507;

[3]       T. Chu*, “Silicon Photonic Interconnects for CPUs of High Performance Computer”,  (invited) in the 4th Photonics Global Conference (PGC, Singapore, 2015), paper:20150628-20150703;

[4]       T. Chu*, L. Qiao, W. Tang. “High-speed 8× 8 electro-optic switch matrix based on silicon PIN structure waveguides”, in the 12th International Conference on Group IV Photonics (GFP, Vancouver, 2015), paper: 123-124;

[5]       储涛* “HPC内高速光互连网络与硅基光电子集成器件”, 2015年全国高性能计算学术年会，(HPC China), paper:20151110-20151112 ;

[6]      L. Qiao, W. Tang, and T. Chu*, “Non-blocking 8×8 Silicon Electro-optic Switch,” (oral) in 2015 Conference on Lasers and Electro-Optics Pacific Rim, (CLEO-PR, Busan/South Korea, 2015), paper :25J1_5;

[7]       K. Hou, T. Chu*, “Ultra-compact and low-loss polarization rotator based on plasmonic waveguide,” (oral) in The 14th International Conference Optical Communications and Networks (ICOCN, Nanjing, 2015), paper: 1-3;

2014

[1]       Tong Ye, Yunfei Fu, and Tao Chu*, “Crosstalk reduction in Si arrayed waveguide grating with parabolic tapers,” (oral) in the 4th International Symposium on Photonics and Electronics Convergence (ISPEC, Tokyo/Japan, 2014), paper E-4

[2]       Tao Chu*, “Silicon photonic devices for optical interconnections” (invited) in Asia Communications and Photonics Conference (ACP, Shanghai/China, 2014), paper AF3B.1.;

[3]       Tao Chu*, “High-speed silicon modulators and silicon photonics researches in China” (invited) in the 61th Spring Meeting of the Japan Society of Applied Physics (JSAP, Tokyo/Japan, 2014), paper 19a-F8-7.;

2013

[1]  T. Chu*, “Silicon photonic devices for optical interconnections” (invited), Asia Communications and Photonics Conference (ACP2014), paper AF3B.1., Shanghai/China, (2014).

[2]  T. Chu*, “High-speed silicon modulators and silicon photonics researches in China” (invited), the 61th Spring Meeting of the Japan Society of Applied Physics (JSAP2014), paper 19a-F8-7., Tokyo/Japan, (2014).

[3]   T. Chu*, X. Xiao, H. Xu, X. Li, Z. Li, Y. Yu and J. Yu,  ^“High-speed Silicon Modulators” (invited), 39th European Conference on Optical Communication (ECOC2013), London/UK, (2013);

[4]   T. Chu*, X. Xiao, Z. Li, Y. Yu and J. Yu, “CMOS-compatible silicon photonic devices for optical network-on-chip” (invited), 7th International Conference on Materials for Advanced Technologies (ICMAT2013), Signapore, (2013);

[5]   X. Xiao, H. Xu, X. Li, Z. Li, T. Chu, J. Yu, Y. Yu, “60 Gbit/s Silicon Modulators with Enhanced Electro-optical Efficiency”, the Optical Fiber Communication Conference and Exposition/National Fiber Optic Engineers Conference (OFC/NFOEC2012), OW4J.3, CA/USA, (2013);

2012

[1]   X. Xiao, X. Li, H. Xu, Z. Li, T. Chu, J. Yu, and Y. Yu, “High-Speed Silicon Microring Modulator based on Zigzag PN Junction”, IEEE Photonics Conference (IPC2012), Burlingame/USA, (2012);

[2]   H. Xu, X. Xiao, X. Li, Z. Li, T. Chu, Y. Yu ,J. Yu : “44Gbit/s silicon Mach-Zehnder modulator based on interleaved PN junctions”, 2012 IEEE 9th International Conference on Group IV Photonics (GFPIV2012) pp.201-203, (2012);

[3]   H. Xu, X. Xiao, X. Li, Y. Hu, Z. Li, T. Chu, Y. Yu, J. Yu:” High speed silicon Mach-Zehnder modulator with circuit model analysis” ,Asia Communications and Photonics Conference (ACP2012), Guangzhou, China, November 7, (2012);

[4]   Y. Fu, Z. Li, T. Chu*, Y. Yu, J. Yu, and Q. Li: “Broad-band Efficient Edge Couplers for Compact Silicon Photonic Circuits”, Photonics and Optolectronics Meetings (POEM2012), (2012);

2011

[1]   K. Xiong, X. Xiao, Y. Hu, Z. Li, T. Chu, Y. Yu, J. Yu: “Single-mode silicon-on-insulator elliptical microdisk resonators with high Q factors” Photonics and Optolectronics Meetings (POEM2011),(2011);

Before 2010

[1]   T. Chu*, N. Fujioka, S. Nakamura, M. Tokushima, and M. Ishizaka, ^“C and L Bands Wavelength Tunable Laser with Silicon Photonic-wire Waveguide Micro-ring Resonators” (invited), Integrated Photonics Research, Silicon and Nano Photonics (IPR2010), Monterey/CA/USA, (2010);

[2]   T. Chu*, N. Fujioka, S. Nakamura, M. Tokushima, and M. Ishizaka, ^“Full C and L Bands Wavelength Tunable Laser Module with Silicon Micro-ring Resonators” (invited), the 15^th Optoelectronics and Communications Conference (OECC2010), Sapporo/Japan, (2010);

[3]   T. Chu*, N. Fujioka, S. Nakamura, M. Tokushima, and M. Ishizaka, ^“Compact, Low Power Consumption  Wavelength Tunable Laser with Silicon Photonic-wire Waveguide Micro-ring Resonators”, 35th European Conference on Optical Communication (ECOC2009), Vienna/Austria,(2009);

[4]   N. Fujioka, T. Chu, S. Nakamura, and M. Ishizaka, “Low reflection optical coupling for hybrid integrated wavelength tunable laser with silicon waveguide ring resonators”, Extended abstract of the 2009 international conference on solid state devices and materials (SSDM2009), Sendai/Japan, (2009);

[5]   M. Sakauchi1, I. Nishioka1, S. Nakamura, T. Chu, Y. Urino, “Demonstration of Fast Optical Protection in ROADM system with One-chip Color/direction-independent Add/drop Multiplexer Employing Silicon Phonic Circuit”, Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC 2009), San Diego/USA,(2009);

[6]   S. Nakamura, T. Chu, M. Ishizaka, M. Tokushima, Y. Urino, M. Sakauchi, I. Nishioka, and K. Fukuchi, “Ultra-small silicon photonic device integrating an array waveguide grating and switches for flexible photonic network node”, 34th European Conference on Optical Communication (ECOC2008), vol.2, pp.175-176, Brussels/Belgium, (2008);

[7]   H. Yamada, T. Chu, S. Nakamura, Y. Urino, S. Ishida, and Y. Arakawa, “Si waveguide devices for optical communication”, (invited) The 7th Pacific Rim Conference On Lasers and Electro-Optics (CLEO-PR2007), pp.216-217, Seoul/Korea, (2007);

[8]   H. Yamada, T. Chu, M. Tojo, S. Nakamura, M. Tokushima, Y. Urino, S. Ishida, and Y. Arakawa, “A compact optical switch module with Si-wire waveguides”, 4th IEEE International Conference on Group IV Photonics 2007 (GFPIV2007), pp. 119-121, Tokyo/Japan, (2007);

[9]   T. Chu, H. Yamada, S. Nakamura, M. Tojo, Y. Urino, S. Ishida, and Y. Arakawa, “Silicon Photonic-wire Waveguide Devices”, (invited) Photonic West 2007, San Jose/USA, Proceedings of SPIE, Vol. 6477, pp. 647709-1-9, (2007);

[10]   T. Chu*, H. Yamada, A. Gomyo, J. Ushida, S. Ishida, and Y. Arakawa, “Reconfigurable optical add-drop multiplexer (R-OADM) based on silicon photonic crystal slab waveguides”, (invited) Optics East 2006, Boston/USA, Proceedings of SPIE, Vol. 6376, pp.63760I-1-8, (2006);

[11]   T. Chu*, H. Yamada, A. Gomyo, J. Ushida, S. Ishida, and Y. Arakawa, “Integrated reconfigurable optical add-drop multiplexer (R-OADM) based on silicon nano-photonic waveguides”, 3rd IEEE international conference on group IV photonics (GFPIV2006), pp.261-263, Ottawa/Canada, (2006);

[12]   H. Yamada, T. Chu, A. Gomyo, J. Ushida, S. Ishida, and Y. Arakawa, “The photonic crystal slab and Si-wire waveguide devices”, (invited) Asia-Pacific Optical Communications Conference and Exhibition (APOC2006), Gwangju/Korea, Proceedings of SPIE, Vol. 6351, pp.635122-1-7, (2006);

[13]   H. Yamada, T. Chu, A. Gomyo, J. Ushida, S. Ishida, and Y. Arakawa, “Integrated Photonic Network Node Chip with Photonic Crystals”, (invited) Extended abstract of the 2006 international conference on solid state devices and materials (SSDM2006), Tokyo/Japan, pp.42-43, (2006);

[14]   A.Gomyo, J. Ushida, H. Yamada, T. Chu, S. Ishida, and Y. Arakawa, “Optical add-drop multiplexer with hexagonal-hole lattice PC slab waveguides”, (invited) Optics East 2006, Boston/USA, Proceedings of SPIE, Vol. 6376, pp.63760J-1-8, (2006);

[15]   T. Chu*, H. Yamada, S. Ishida, and Y. Arakawa, “A compact silicon nano-wire waveguide optic switch” 2nd IEEE international conference on group IV photonics (GFPIV2005), p. 29, Antwerp/Belgium, (2005);

[16]   T. Chu*, H. Yamada, S. Ishida, and Y. Arakawa, “Reconfigurable Optical Add-Drop Multiplexer Based on Silicon Nano-Wire Waveguides” 31st European Conference on Optical Communication (ECOC2005), pp.245-246, Glasgow/UK, (2005);

[17]   H. Yamada, T. Chu, S. Ishida, and Y. Arakawa, “Si-nanowire optical waveguide devices for optical communications”, (invited) Asia-Pacific Optical Communications Conference and Exhibition (APOC2005), Shanghai/China, Proceedings of SPIE, Vol. 6019, pp. 60192x_1-7 (2005);

[18]   T. Chu*, H. Yamada, S. Ishida, and Y. Arakawa, “Thermo-optic switch based on 2D-Si photonic crystals”, 2nd IEEE international conference on group IV photonics (GFPIV2004), FC3, Hongkong/China, (2004);

[19]  T. Chu*, H. Yamada, S. Ishida, and Y. Arakawa, “Photonic bandgap tuning with thermo-optic effect”, The 17th annual meeting of IEEE laser & electron-optics society (LEOS2004), THL2, pp.811-812, Puerto Rico /USA, (2004);