PUBLICATIONS

2021

Papers

1. Distributed measurement of the Brillouin dynamic grating spectrum using the correlation-domain method with a fixed correlation peak position
   Youhei Okawa and Kazuo Hotate
   OSA continuum 4(3), 990-999 (2021).
   https://doi.org/10.1364/OSAC.419270

Presentations

1. Reconstraction of Brillouin gain distribution from its Radon transform
   Youhei Okawa, Kazuo Hotate
   The 68th JSAP Spring Meeting, 2021
2. Optimization of optical frequency modulation waveform in Brillouin optical correlation-domain analysis for enhancing strain measurement dynamic range
   Naoki Ito, Youhei Okawa, Kazuo Hotate
   The 68th JSAP Spring Meeting, 2021
3. Side-lobe suppression by optimizing light intensity modulation waveform in synthesis of optical coherence function
   Kei Kuroyanagi, Youhei Okawa, Kazuo Hotate
   The 68th JSAP Spring Meeting, 2021
4. Performance improvement of BOCDR strain distributed measurement system by combined use of double-frequency modulation scheme and intensity modulation scheme
   Rui Yamamoto, Youhei Okawa, Kazuo Hotate
   The 68th JSAP Spring Meeting, 2021

2020

Papers

1. Distributed measurement of Brillouin dynamic grating spectrum localized by an intensity-modulated correlation-domain technique
   Youhei Okawa, Rodrigo Kendy Yamashita, Masato Kishi, and Kazuo Hotate
   Opt. Express 28(14) 21310-21317 (2020).
   https://doi.org/10.1364/OE.396811
2. Brillouin optical correlation-domain reflectometry theory using stochastic representation of spontaneous Brillouin scattering light
   Youhei Okawa and Kazuo Hotate
   J. Opt. Soc. Am. B 37(7), 2157-2162 (2020).
   https://doi.org/10.1364/JOSAB.394598
3. Optical coherent control of stimulated Brillouin scattering via acoustic wave interference
   Youhei Okawa and Kazuo Hotate
   Opt. Lett. 45(13), 3406-3409 (2020).
   https://doi.org/10.1364/OL.390083
4. Analysis of Brillouin dynamic grating localized by intensity-modulated correlation-domain technique for distributed fiber sensing
   Youhei Okawa, Rodrigo Kendy Yamashita, Masato Kishi, and Kazuo Hotate
   Opt. Express 28(5), 6981-6994 (2020).
   https://doi.org/10.1364/OE.385561

Presentations

1. Brillouin gain control via acoustic wave interference in polarization-maintaining fiber
   Youhei Okawa, Kazuo Hotate
   The 3rd OFT meeting, 2020
2. Study on function improvement in BDG-BOCDA discriminative and distributed measurement system
   Youhei Okawa, Kazuo Hotate
   The 81st JSAP Autumn Meeting, 2020
3. Optical coherent control of stimulated Brillouin scattering via four-wave mixing
   Youhei Okawa, Kazuo Hotate
   The 67th JSAP Spring Meeting, 2020
4. Measurement range elongation in BOCDR system with used calculation processing PM scheme and double modulation scheme
   Seiji Idachi, Kazuo Hotate
   The 67th JSAP Spring Meeting, 2020

2019

Papers

1. Brillouin Optical Correlation-Domain Technologies Based on Synthesis of Optical Coherence Function as Fiber Optic Nerve Systems for Structural Health Monitoring
   K. Hotate
   Appl. Sci. 9(1), 187 (2019).
   https://doi.org/10.3390/app9010187

Presentations

1. Effective localization of Brillouin dynamic grating for distributed fiber sensing by intensity modulated correlation-domain technique
   Y. Okawa, R. K. Yamashita, M. Kishi and K. Hotate
   MOC2019, 24th Microoptics Conference, Toyama, Japan, H-4
2. Reduction of optical background noise in BOCDA distributed strain measurement technology by synthesizing frequency modulation waveform of light source
   N. Ito, M. Kishi and K. Hotate
   MOC2019, 24th Microoptics Conference, Toyama, Japan, P-7
3. Localization of Brillouin Dynamic Grating by Intensity-Modulated Correlation-Domain Technique
   Youhei Okawa, Rodorigo Kendy Yamashita, Masato Kishi, Kazuo Hotate
   The 80th JSAP Autumn Meeting, 2019
4. Enhancement of strain dynamic range in BOCDA distributed strain measurement technology by synthesizing frequency modulation waveform of light source
   Naoki Ito, Rodrigo Kendy Yamashita, Kazuo Hotate
   The 80th JSAP Autumn Meeting, 2019
5. Spacial Resolution Improvement of Discriminative and Distributed Meseurement of Temperature/Strain with PMF using Intensity-Modulated Correlation-Domain Technique
   Youhei Okawa, Rodrigo Kendy Yamashita, Masato Kishi, Kazuo Hotate
   Optical Sensors and Sensing Congress, San Jose
6. Analysis of light-source intensity modulation effect in BDG-BOCDA srtrain/temperature discriminative distributed measurement system
   Youhei Okawa, Rodrigo Kendy Yamashita, Masato Kishi, Kazuo Hotate
   The 66th JSAP Spring Meeting, 2019
7. Reduction of optical background noise in BOCDA distributed srtrain measurement technology by synthesizing frequency modulation waveform of light source
   Naoki Ito, Masato Kishi, Kazuo Hotate
   The 66th JSAP Spring Meeting, 2019
8. Optimization of filter of shape to reduce optical background noise in BOCDR
   Kota Uyama, Ryu Shimizu, Masato Kishi, Kazuo Hotate
   The 66th JSAP Spring Meeting, 2019

2018

Presentations

1. Enhancement of strain measurement dynamic range in basic BOCDR system with background noise reduction by simple filtering calculation scheme
   Ryu Shimizu, Masato Kishi, Kazuo Hotate
   26th International Conference on Optical Fibre Sensors
2. Widening of Strain Dynamic Range in BOCDR with Phase Modulation based on BPSK
   Kota Uyama, Ryu Shimizu, Masato Kishi, Kazuo Hotate
   The 79th JSAP Autumn Meeting, 2018

2017

Papers

1. Theoretical evaluation of Brillouin dynamic grating length localized by optical correlation domain technique through reflection spectrum simulation
   Rodrigo Kendy Yamashita, Masato Kishi, Kazuo Hotate
   Applied Physics Express 10, 042501 (2017).