Yasuo KOKUBUN


Proposal of Waveguide-Type Polarization Switch Based on Microring Resonator
Keita SUZUKI Tomoki HIRAYAMA Yasuo KOKUBUN Taro ARAKAWA 
Publication:   
Publication Date: 2017/10/01
Vol. E100-C  No. 10  pp. 767-774
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
microring resonatorpolarization switchmultiple quantum wellform birefringence
 Summary | Full Text:PDF(1004.5KB)

Design of Fourth-Order Series Coupled Microring Filter on Chebyshev Filter Condition
Nobuyuki HAYASAKA Taro ARAKAWA Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/02/01
Vol. E99-C  No. 2  pp. 235-241
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Photonics Technologies and Their Applications)
Category: 
Keyword: 
microring resonatorwavelength selective switchButterworth filterChebyshev filter
 Summary | Full Text:PDF(685.9KB)

Driving Voltage Analysis for Fast Response of Waveguide Optical Switch Based on Movement of Liquid Droplet Driven by Electrostatic Force
Takuji IKEMOTO Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/12/01
Vol. E91-C  No. 12  pp. 1923-1932
Type of Manuscript:  PAPER
Category: Optoelectronics
Keyword: 
optical switchmicroelectro mechanical systemmicrochanneldropletelectrostatic force
 Summary | Full Text:PDF(965.2KB)

High Index Contrast Optical Waveguides and Their Applications to Microring Filter Circuit and Wavelength Selective Switch
Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/05/01
Vol. E90-C  No. 5  pp. 1037-1045
Type of Manuscript:  INVITED PAPER (Special Section on Recent Advances in Integrated Photonic Devices)
Category: 
Keyword: 
high index contrastmicroring resonatorwavelength selective switchthermo-optic effectVernier effectoptical cross connect
 Summary | Full Text:PDF(1017.2KB)

Fabrication of Microchannel with Thin Cover Layer for an Optical Waveguide MEMS Switch Based on Microfluidics
Takuji IKEMOTO Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/01/01
Vol. E90-C  No. 1  pp. 78-86
Type of Manuscript:  Special Section PAPER (Special Section on Microoptomechatronics)
Category: Micro/Nano Photonic Devices
Keyword: 
optical switchmicroelectromechanical systemmicrochannelDamascene processthin cover layer
 Summary | Full Text:PDF(2.3MB)

Optimum Wavelength Filter Spectrum Response in DWDM Systems for Ultimate Spectral Efficiency
Shuichi SUZUKI Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/09/01
Vol. E88-B  No. 9  pp. 3649-3659
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
WDMwavelength multi/demultiplexerspectral efficiencycrosstalkcascaded filtercrosstalk floor
 Summary | Full Text:PDF(1.7MB)

High UV Sensitivity of SiON Film and Its Application to Center Wavelength Trimming of Microring Resonator Filter
Satoshi UENO Toshiki NAGANAWA Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/05/01
Vol. E88-C  No. 5  pp. 998-1004
Type of Manuscript:  Special Section PAPER (Joint Special Section on Recent Progress in Optoelectronics and Communications)
Category: Optical Passive Devices and Modules
Keyword: 
microring resonatorUV sensitivitytrimmingSiON
 Summary | Full Text:PDF(1.1MB)

Vertically Coupled Microring Resonator Filter for Integrated Add/Drop Node
Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/03/01
Vol. E88-C  No. 3  pp. 349-362
Type of Manuscript:  INVITED PAPER (Special Section on Optical Signal-Processing Devices for Photonic Networks)
Category: 
Keyword: 
microresonatorsintegrated opticsoptical waveguide filtershigh index contrast optical waveguidesadd/drop wavelength filters
 Summary | Full Text:PDF(3.6MB)

Box-Like Response of Microring Resonator Filter by Stacked Double-Ring Geometry
Yasuo KOKUBUN Takashi KATO Sai Tak CHU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/04/01
Vol. E85-C  No. 4  pp. 1018-1024
Type of Manuscript:  Special Section PAPER (Special Issue on Recent Progress of Integrated Photonic Devices)
Category: Hybrid and Passive Devices
Keyword: 
optical filteroptical waveguidering resonatorpass band flatteningstacked configuration
 Summary | Full Text:PDF(1MB)

Athermal Narrow-Band Optical Filter at 1. 55 µ m Wavelength by Silica-Based Athermal Waveguide
Yasuo KOKUBUN Shigeru YONEDA Shinnosuke MATSUURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/08/25
Vol. E81-C  No. 8  pp. 1187-1194
Type of Manuscript:  Special Section PAPER (Special Issue on High-Capacity WDM/TDM Networks)
Category: 
Keyword: 
silica optical waveguideathermal waveguideoptical filteroptical path length temperature dependence
 Summary | Full Text:PDF(747.8KB)

Temperature-Independent Narrow-Band Optical Filter by an Athermal Waveguide
Yasuo KOKUBUN Shigeru YONEDA Hiroaki TANAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/05/25
Vol. E80-C  No. 5  pp. 632-639
Type of Manuscript:  Special Section PAPER (Special Issue on Photonic Integrated Circuits)
Category: 
Keyword: 
optical waveguideoptical path lengthwavelength filtertemperature dependenceathermal waveguide
 Summary | Full Text:PDF(580KB)

Numerical Synthesis of Multilayer Cladding Optical Waveguides by a Random Sampling Method
Shuichiro ASAKAWA Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/02/25
Vol. E77-C  No. 2  pp. 303-311
Type of Manuscript:  PAPER
Category: Opto-Electronics
Keyword: 
optical waveguidenumerical synthesisdesignrandom samplingmultilayer waveguide
 Summary | Full Text:PDF(758.7KB)

Precise Measurement of the Refractive Index Profile of Optical Fibers by a Nondestructive Interference Method
Yasuo KOKUBUN Kenichi IGA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1977/12/25
Vol. E60-E  No. 12  pp. 702-707
Type of Manuscript:  PAPER
Category: Optical and Quantum Electronics
Keyword: 
 Summary | Full Text:PDF(375.6KB)

An Optical Fiber Mode Analyzer Using the Refraction from the Oblique Section
Kenichi IGA Yasuo KOKUBUN 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1977/01/25
Vol. E60-E  No. 1  pp. 1-7
Type of Manuscript:  PAPER
Category: Optical and Quantum Electronics
Keyword: 
 Summary | Full Text:PDF(515.4KB)