"Hamed Dalir,Yasushi Yokota,Fumio Koyama","Spatial Mode Multiplexer/Demultiplexer Based on Tapered Hollow Waveguide","The 16th Opto-Electronics And Communications Conference, OECC2011",,,,"  7E2_2",,2011,July
"Hamed Dalir,Yasushi Yokota,Fumio Koyama","Spatial Mode Multiplexer/Demultiplexer Based on Tapered Hollow Waveguide",,"IEICE Electronics Express",,"  2011XCL6281",,,2011,May
"Yasushi Yokota,Fumio Koyama","Tunable Spot Size Converter and Vertical Resonant Coupler Based on Hollow Optical Waveguide","32th European Conference on Optical Communication, ECOC","32th European Conference on Optical Communication, ECOC",,,"  We3.p.76",,2006,Sept.
"Yasuki Sakurai,Hideaki Yamakawa,Yasushi Yokota,Akihiro Matsutani,Takahiro Sakaguchi,Fumio Koyama","Hollow Waveguide Distributed Bragg Reflector for Widely Tunable Optical Devices","Optical Fiber Communications Conference 2006","Optical Fiber Communications Conference 2006",,,"  OtuM4",,2006,Mar.
"Toru Miura,Yasushi Yokota,Fumio Koyama","Proposal of tunable demultiplexer based on tapered hollow waveguide with highly reflective multilayer mirrors","18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS2005","18th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS2005",,,"  TuL3","pp. 272-273",2005,Oct.
"Yasuki Sakurai,Yasushi Yokota,Akihiro Matsutani,Fumio Koyama","Temperature Insensitive Operation of Widely Tunable Hollow Waveguide Grating","Conference on Optical Fiber Communications, OFC2005","Conference on Optical Fiber Communications, OFC2005",,,"  OME30",,2005,Mar.
"Yasuki Sakurai,Yasushi Yokota,Akihiro Matsutani,Fumio Koyama","Tunable hollow waveguide Bragg grating with low temperature dependence",,"Appl. Phys. Lett.",,"vol. 86","no. 7","pp. 71111-71113",2005,Feb.
"Y. Yokota,T. Miura,M. Ishikawa,A. Matsutani,F. Koyama","Fabrication of Hollow Optical Waveguide with Wafer Bonding","9th OptoElectronics and Communications Conference, OECC/COIN2004","OptoElectronics and Communications Conference/International Conference on Optical Internet",,"  16F1-4",,,2004,July