Current Affiliation Organization 【 display / non-display 】

Current Affiliation Organization 【 display / non-display 】

External Career 【 display / non-display 】

External Career 【 display / non-display 】

Affiliated academic organizations 【 display / non-display 】

Affiliated academic organizations 【 display / non-display 】

Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

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Research Theme 【 display / non-display 】

Research Theme 【 display / non-display 】

• Quartz-based - Study on design and manufacturing methods for optical devices

Thesis 【 display / non-display 】

Thesis 【 display / non-display 】

• 石英系光ファイバの非線形屈折率測定に関する研究

  2010.03

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Manufacturing Conditions for Non-Melting Polycrystalline Translucency Ceramics Using Composite Quartz Materials

  Kazuya Miyagi, Yosuke Fukano

  日本金属学会   64 ( 12 ) 2814 - 2820   2023.11 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Manufacturing Conditions for Non-Melting Polycrystalline Translucency Ceramics Using Composite Quartz Materials

  MIYAGI Kazuya, FUKANO Yosuke

  Journal of the Japan Society of Powder and Powder Metallurgy ( Japan Society of Powder and Powder Metallurgy )  68 ( 10 ) 409 - 414   2021.10

  Type of publication: Research paper (scientific journal)

  　View Summary

  <p>Verification of the manufacturing conditions for translucency ceramics are showed using powder forming and sintering method in order to establish the manufacturing technology for optical devices with arbitrary complex shape and shape retention, and high-optical excitation. However, this method is extremely difficult to obtain translucency ceramics because the combination of complex factors such as “the shape and particle size of the raw materials, forming conditions and sintering" adversely affect the translucency of the sintered material, which is caused by the transmitted light scattering of the sintered material. Therefore, we have succeeded in realizing translucent ceramics by examining these complicated factors (materials, molding, sintering conditions, crystallization) and specifying the amorphous sintering conditions and the densification-molding conditions necessary to eliminate the light scattering factors inherent in sintered materials. It is necessary to show the correlation of the volume change with respect to T_g-temperature and T_m-temperature, which are important regarding amorphization, considering the sintering treatment conditions that depend on the particle size of the raw material fine powder, and to specify the molding body-pressurization (pressure and time) conditions. These optimizations will make it possible to develop the expected high-functional-photoelectric optical devices with microstructures and, high-power laser light sources independent of materials.</p>

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    CiNii Research

• Verification of Optical Transmission Wide-running range Possible OPGW using the Photonic Crystal Fibers

  N.Ikedo, K.Miyagi, R.Nisikawa and T.Tomimura

  The International Conference on Electrical Engineering ( 電気学会 )    770363   2016.07 [ Peer Review Accepted ]

  Type of publication: Research paper (international conference proceedings)

• Dynamic Control of Effective Area and nonlinearity by changing Ge-doped rate for photonic crystal fibers

  Kazuya Miyagi, Yoshinori Namihira

  IEEE International Conference on Advanced Technologies for Communications ( IEEE )    546 - 548   2013.10 [ Peer Review Accepted ]

  Type of publication: Research paper (international conference proceedings)

• Dynamic Control of Mode Field Diameter and Effective Area by Germanium Doping of Hexagonal Photonic Crystal Fibers

  Kazuya Miyagi, Yoshinori Namihira,Yuho Kasamatsu, Md.A.Hossain

  Optical Review ( 日本光学会 )  20 ( 4 ) 327 - 331   2013.04 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• Characterization of Optical Propagation Properties in Fluorine-Doped Cladding Polarization-Maintaining Photonic Crystal Fibers for Optical Gyroscopes

  Kazuya Miyagi, Sena Takara,Tubasa Fujioka

  Next-generation industrial system study group Okinawa-type sustainable system ( Institute of Electrical Engineers of Japan )    2026.03

   

• Fabrication of Transparent, Amorphous, and High-Density Ceramics Using Powder Sintering and Spherical Nanoparticle Silica

  Kazuya Miyagi, Seina Takara, Tsubasa Fujioka

  Institute of Electrical Engineers of Japan Next Generation Industrial Systems Study Group ( Institute of Electrical Engineers of Japan )    2025.09

   

• Evaluating Particle Motion and Inter-particle Collision Frequency in High-Efficiency Bead Milling via DEM Simulation

  Kazuya Miyagi, Seina Takara, Tsubasa Fujioka

  Institute of Electrical Engineers of Japan Next Generation Industrial Systems Study Group ( Institute of Electrical Engineers of Japan )    2025.09

   

• Study on Transmission Property Control of Photonic Crystal Fibers with Fluorine-Doped Cladding

  Kazuya Miyagi, Seina Takara, Tsubasa Fujioka

  Institute of Electrical Engineers of Japan Next Generation Industrial Systems Study Group ( Institute of Electrical Engineers of Japan )    2025.09

   

• Investigating the Influence of Adsorbed OH Groups on Foaming and Optical Properties in Sintered Quartz Nanoparticles

  Kazuya Miyagi, Seina Takara, Tsubasa Fujioka

  Institute of Electrical Engineers of Japan Next Generation Industrial Systems Study Group ( Institute of Electrical Engineers of Japan )    2025.09

   

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Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Investigating the Influence of Adsorbed OH Groups on Foaming and Optical Properties in Sintered Quartz Nanoparticles

  Kazuya Miyagi* , Sena Takara, Tubasa Fujioka

  The Institute of Electrical Engineers of Japan (IEEJ) Technical Committee on Next-Generation Industrial Systems  (National Institute of Technology, Okinawa College)  2025.09  -  2025.09 

• Fabrication of Transparent, Amorphous, and High-Density Ceramics Using Powder Sintering and Spherical Nanoparticle Silica

  Kazuya Miyagi , Sena Takara, Tubasa Fujioka

  The Institute of Electrical Engineers of Japan (IEEJ) Technical Committee on Next-Generation Industrial Systems  (National Institute of Technology, Okinawa College)  2025.09  -  2025.09 

• Evaluating Particle Motion and Inter-particle Collision Frequency in High-Efficiency Bead Milling via DEM Simulation

  Kazuya Miyagi,Tsubasa Fujioka, Sena Takara

  The Institute of Electrical Engineers of Japan (IEEJ) Technical Committee on Next-Generation Industrial Systems  (National Institute of Technology, Okinawa College)  2025.09  -  2025.09 

• DEM simulation evaluation of inter-particle collision frequency and particle motion for improving the efficiency of bead mill grinding

  Kazuya Miyagi, Seina Takara, Tsubasa Fujioka

  Institute of Electrical Engineers of Japan Next Generation Industrial Systems Study Group  2025.09  -  2025.09 

• Measurement of Mode Field Diameter and Effective Area of Photonic Crystal Fibers using Far Field Scan Method

  K.Miyagi, Y.Namihira

  Optical Fiber Measurement Conference  2009.09  -  2009.09 

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Industrial Property 【 display / non-display 】

Industrial Property 【 display / non-display 】

• Photonic crystal fiber, fiber optic gyro, fiber optic ring resonator and fiber optic cable

  Industrial Property No 特願2025-190140  (2025.11.11)

  Kazuya Miyagi

Other Research Activities 【 display / non-display 】

Other Research Activities 【 display / non-display 】

• Okinawa-Hawaii Cooperation Promotion Project

  Overseas dispatch 

  2017.02

  -

  2017.03

  　View Summary

  Short-term training at the Department of Electrical Engineering, University of Hawaii at Manoa. Studied the educational and study policies of a U.S. state university and strengthened ties with faculty members at the University of Hawaii at Manoa.

• Dispatched overseas by University of the Ryukyus

  Overseas dispatch 

  2016.03

  　

  　

  　View Summary

  The purpose was to learn about the research and educational policies of the electrical engineering course at the University of Hawaii at Manoa, and to use it as a reference for research and educational activities at the University of the Ryukyus. We also conducted a short-term overseas training program to build relationships with local faculty members.

Academic Awards 【 display / non-display 】

Academic Awards 【 display / non-display 】

• The Institute of Electrical Engineers of Japan, Industrial Applications Division Award

  2025.02.27   Institute of Electric Engineers of Japan   Optical Transmission Analysis of Ge-Doped - Polarization-Photonic Crystal Fiber

  Winner: Kazuya Miyagi, Ichigo Naka, Shogo Yamashiro, Tsubasa Fujioka

  　View Summary

  PM-PCF can add birefringence properties depending on the regular arrangement of air holes around the core and the amount of germanium doping in the core. Numerical simulation is effective to analyze optical transmission characteristics. We present FDM analysis of the optical transmission evaluation of Ge-doped octagonal photonic crystal optical fibers.

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Study on fabrication methods for microstructured photonic crystal optical devices with high functional characteristics

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2025.04  -  2028.03 

  Investigator(s): Kazuya Miyagi  

• Grant-in-Aid for Young Scientists(B)

  Project Year: 2012.04  -  2015.03 

  Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

Other External funds 【 display / non-display 】

Other External funds 【 display / non-display 】

• Project Name: Development of lighting poles with improved strength, including bases, suitable for the Okinawan environment, which is subject to the strong winds and sea salt.

  Project Year: 2025.07  -  2026.03 

Joint Research activities 【 display / non-display 】

Joint Research activities 【 display / non-display 】

• Development of next-generation lighting devices

  Project Year: 2013.04  -  2014.03 

  Investigator(s): Kazuya Miyagi   Offer Organization: Soshin Kogyo Co., Ltd.

  Direct: 1,000,000 (YEN) 

SDGs 【 display / non-display 】

SDGs 【 display / non-display 】

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Social Activity 【 display / non-display 】

Social Activity 【 display / non-display 】

• Expert Committee for Research on AI and Robot Systemization Technology to Accelerate Okinawa-Style Innovation

  Chikatoshi Yamada (Chair) (Okinawa National College of Technology)   Technical Committee on Next Generation Industrial Systems, The Institute of Electrical Engineers of Japan 

  2025.04

  -

  2028.03

  　View Summary

  To promote the creation of new businesses, industrial DX, and innovation unique to Okinawa by making effective use of Okinawa's tourism resources, location, climate, weather conditions, and policy requirements for business, we will conduct field surveys, research exchanges, and other activities related to supporting technologies for industrial development in the fields of AI, robotics, and embedded technology. The project aims to promote the exchange of information on supporting technologies and the development and training of R&D personnel.