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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 10 of 10  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
OFT 2020-10-08
10:50
Online Online [Poster Presentation] Design of graded-index type photonic crystal fiber with uniform air hole diameter and its application to fiber collimator
Daichi Yoshihara, Hirohisa Yokota, Yoh Imai (Ibaraki Univ.) OFT2020-17
A graded-index (GI) type photonic crystal fiber (PCF) that has an α-power effective index distribution in radial directi... [more] OFT2020-17
pp.33-36
OFT 2020-01-17
09:50
Aichi NINS Okazaki Conference Center Theoretical study of temperature/strain sensor using graded-index type photonic crystal fiber
Hirohisa Yokota, Shuto Iseki, Yoh Imai (Ibaraki Univ.) OFT2019-54
A graded-index type photonic crystal fiber (GI-PCF) with α-power air hole diameter distribution in radial direction oper... [more] OFT2019-54
pp.39-42
OFT 2017-10-13
09:55
Kochi Kochi Prefectural Culture Hall Variable Photonic Crystal Fiber Optical Attenuator Using Bending Loss
Hirohisa Yokota, Tomohiko Sano, Yoh Imai (Ibaraki Univ.) OFT2017-43
Recently, an importance of optical attenuator has increased in fiber optic communication systems because an optical powe... [more] OFT2017-43
pp.23-26
OFT 2017-01-20
13:55
Tokyo Kikaishinko Kaikan Design of Graded-Index-Type Photonic Crystal Fiber for Collimator Application with Good Tolerance in Fiber Length Error
Hirohisa Yokota, Mizuki Wakabayashi, Keiichi Higuchi, Yoh Imai (Ibaraki Univ.) OFT2016-37
A graded-index-type photonic crystal fiber (GI-PCF) that has α-power air hole diameter distribution in radial direction,... [more] OFT2016-37
pp.11-14
OCS, OPE, OFT
(Joint) [detail]
2014-02-28
14:25
Okinawa nest HOTEL Naha Influence of gamma ray irradiation in reflection spectra of polarization-maintaining fiber Bragg gratings
Yota Shimabukuro, Hirohisa Yokota, Yoh Imai (Ibaraki Univ.) OFT2013-77 OPE2013-237
It is known that changes of optical characteristics are caused in optical fibers by irradiation of radiation such as gam... [more] OFT2013-77 OPE2013-237
pp.121-124(OFT), pp.175-178(OPE)
OFT 2013-01-25
09:00
Tokushima   Fabrication of polarization-maintaining photonic crystal fiber optical attenuator using air hole diameter control
Hirohisa Yokota, Naoya Inoue, Yuto Kobayashi, Yoh Imai (Ibaraki Univ.) OFT2012-62
Photonic crystal fiber (PCF) optical attenuators that are fabricated by air hole diameter control have advantages such a... [more] OFT2012-62
pp.51-54
OPE, OFT 2012-03-02
15:50
Tokyo   Inscription of refractive index modulated gratings in tellurite fibers
Hirohisa Yokota, Kyosuke Mano, Motoaki Kobayashi, Yoh Imai, Yutaka Sasaki (Ibaraki Univ.) OFT2011-83 OPE2011-209
We attempted to inscribe refractive index modulated gratings in tellurite fibers to suppress the power of control light ... [more] OFT2011-83 OPE2011-209
pp.53-56
OFT 2010-10-25
15:05
Saitama Nippon Institute of Technology Fabrication of Photonic Crystal Fiber Attenuator with Air Hole Diameter Control Using CO2 Laser Irradiation
Hirohisa Yokota, Kousuke Ushiroda, Naoya Inoue, Yoh Imai, Yutaka Sasaki (Ibaraki Univ.) OFT2010-34
Photonic crystal fiber (PCF) attenuators with air hole diameter control were fabricated by PCF fusion using CO_2 laser i... [more] OFT2010-34
pp.29-32
OFT 2009-10-30
13:15
Oita   Coupling Characteristic Adjustment of Photonic Crystal Fiber Coupler Using Air Hole Control with CO2 Laser Irradiation
Hirohisa Yokota, Yuu Nakajima, Tomoya Ichige, Yoh Imai, Yutaka Sasaki (Ibaraki Univ.) OFT2009-49
Coupling characteristics of a photonic crystal fiber coupler (PCFC) depend on whether air holes at the tapered region of... [more] OFT2009-49
pp.73-76
OFT, OCS, ITE-BCT, IEE-CMN
(Joint) [detail]
2008-11-21
09:35
Oita   Connection of Photonic Crystal Fiber and Single-Mode Fiber with Fused Coupler Forming
Hirohisa Yokota, Hirotomo Yashima, Yoh Imai, Yutaka Sasaki (Ibaraki Univ.) OFT2008-61
A fused fiber coupler forming with a photonic crystal fiber (PCF) and a single-mode fiber (SMF) as a solution of their c... [more] OFT2008-61
pp.77-80
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