Kazuo Hotate

Summary

Affiliation: University of Tokyo
Country: Japan

Publications

  1. ncbi request reprint Proposal and experimental verification of Bragg wavelength distribution measurement within a long-length FBG by synthesis of optical coherence function
    Kazuo Hotate
    Department of Electronic Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 16:7881-7. 2008
  2. doi request reprint Measurement range enlargement in Brillouin optical correlation-domain reflectometry based on double-modulation scheme
    Yosuke Mizuno
    Department of Electrical Engineering and Information Systems, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 18:5926-33. 2010
  3. ncbi request reprint Experimental study of Brillouin scattering in fluorine-doped single-mode optical fibers
    Weiwen Zou
    Department of Electronic Engineering, The University of Tokyo, Tokyo, Japan
    Opt Express 16:18804-12. 2008
  4. doi request reprint One-laser-based generation/detection of Brillouin dynamic grating and its application to distributed discrimination of strain and temperature
    Weiwen Zou
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo 113 8656, Japan
    Opt Express 19:2363-70. 2011
  5. ncbi request reprint Measurement range enlargement in Brillouin optical correlation-domain reflectometry based on temporal gating scheme
    Yosuke Mizuno
    Department of Electrical Engineering and Information Systems, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 17:9040-6. 2009
  6. doi request reprint Reduction of polarization-fluctuation induced drift in resonator fiber optic gyro by a resonator with twin 90 degrees polarization-axis rotated splices
    Xijing Wang
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo ku, Tokyo, Japan
    Opt Express 18:1677-83. 2010
  7. ncbi request reprint Proposal of Brillouin optical correlation-domain reflectometry (BOCDR)
    Yosuke Mizuno
    Department of Electronic Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 16:12148-53. 2008
  8. ncbi request reprint Complete discrimination of strain and temperature using Brillouin frequency shift and birefringence in a polarization-maintaining fiber
    Weiwen Zou
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo, Japan
    Opt Express 17:1248-55. 2009
  9. ncbi request reprint Acoustic modal analysis and control in w-shaped triple-layer optical fibers with highly-germanium-doped core and F-doped inner cladding
    Weiwen Zou
    Department of Electronic Engineering, The University of Tokyo, Tokyo 113 8656, Japan
    Opt Express 16:10006-17. 2008
  10. ncbi request reprint Stimulated Brillouin scattering and its dependences on strain and temperature in a high-delta optical fiber with F-doped depressed inner cladding
    Weiwen Zou
    Department of Electronic Engineering, University of Tokyo, Japan
    Opt Lett 32:600-2. 2007

Collaborators

Detail Information

Publications16

  1. ncbi request reprint Proposal and experimental verification of Bragg wavelength distribution measurement within a long-length FBG by synthesis of optical coherence function
    Kazuo Hotate
    Department of Electronic Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 16:7881-7. 2008
    ..As a verification of this method, the detection of local Bragg wavelength shift due to temperature change within a short section in a long-length FBG is demonstrated experimentally...
  2. doi request reprint Measurement range enlargement in Brillouin optical correlation-domain reflectometry based on double-modulation scheme
    Yosuke Mizuno
    Department of Electrical Engineering and Information Systems, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 18:5926-33. 2010
    ..5-km measurement range were simultaneously obtained. Furthermore, 27-cm resolution and 1.5-km measurement range were also simultaneously achieved when a noise-floor compensation technique was employed...
  3. ncbi request reprint Experimental study of Brillouin scattering in fluorine-doped single-mode optical fibers
    Weiwen Zou
    Department of Electronic Engineering, The University of Tokyo, Tokyo, Japan
    Opt Express 16:18804-12. 2008
    ..Moreover, it is found that the dependences of acoustic resonance frequencies on applied strain or temperature change are quantitatively enhanced by fluorine dopants, which is in opposite trend when compared with germanium ones...
  4. doi request reprint One-laser-based generation/detection of Brillouin dynamic grating and its application to distributed discrimination of strain and temperature
    Weiwen Zou
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo 113 8656, Japan
    Opt Express 19:2363-70. 2011
    ..Distributed discrimination of strain and temperature is also achieved with high accuracy...
  5. ncbi request reprint Measurement range enlargement in Brillouin optical correlation-domain reflectometry based on temporal gating scheme
    Yosuke Mizuno
    Department of Electrical Engineering and Information Systems, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 17:9040-6. 2009
    ..In this scheme, the trade-off problem between the measurement range and the spatial resolution can be dissolved. 66-cm spatial resolution and 1-km measurement range were simultaneously obtained with 50-Hz sampling rate...
  6. doi request reprint Reduction of polarization-fluctuation induced drift in resonator fiber optic gyro by a resonator with twin 90 degrees polarization-axis rotated splices
    Xijing Wang
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo ku, Tokyo, Japan
    Opt Express 18:1677-83. 2010
    ....
  7. ncbi request reprint Proposal of Brillouin optical correlation-domain reflectometry (BOCDR)
    Yosuke Mizuno
    Department of Electronic Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Opt Express 16:12148-53. 2008
    ..Spatial resolution of 40 cm was experimentally demonstrated with sampling rate of 50 Hz...
  8. ncbi request reprint Complete discrimination of strain and temperature using Brillouin frequency shift and birefringence in a polarization-maintaining fiber
    Weiwen Zou
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo, Japan
    Opt Express 17:1248-55. 2009
    ..A reproducible accuracy of discriminating strain and temperature as fine as 3 micro-strains and 0.08 degrees Celsius is demonstrated...
  9. ncbi request reprint Acoustic modal analysis and control in w-shaped triple-layer optical fibers with highly-germanium-doped core and F-doped inner cladding
    Weiwen Zou
    Department of Electronic Engineering, The University of Tokyo, Tokyo 113 8656, Japan
    Opt Express 16:10006-17. 2008
    ....
  10. ncbi request reprint Stimulated Brillouin scattering and its dependences on strain and temperature in a high-delta optical fiber with F-doped depressed inner cladding
    Weiwen Zou
    Department of Electronic Engineering, University of Tokyo, Japan
    Opt Lett 32:600-2. 2007
    ..The dependences of SBS on strain and temperature are measured and compared for each acoustic mode to investigate the feasibility of discriminative sensing of strain and temperature by use of the fiber...
  11. ncbi request reprint Distributed strain measurement with millimeter-order spatial resolution based on Brillouin optical correlation domain analysis
    Kwang Yong Song
    Department of Electronic Engineering, Unviersity of Tokyo, Tokyo, Japan
    Opt Lett 31:2526-8. 2006
    ..The Brillouin frequency shifts of 3 mm fiber sections are successfully measured with a theoretical spatial resolution of 1.6 mm...
  12. doi request reprint Experimental investigation on Brillouin scattering property in highly nonlinear photonic crystal fiber with hybrid core
    Weiwen Zou
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo, Japan
    Opt Express 20:11083-90. 2012
    ..The temperature and strain dependences of the first resonance peak are also investigated, showing the similar behaviors as those in all-silica optical fibers...
  13. ncbi request reprint Correlation-based distributed measurement of a dynamic grating spectrum generated in stimulated Brillouin scattering in a polarization-maintaining optical fiber
    Weiwen Zou
    Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo, Japan
    Opt Lett 34:1126-8. 2009
    ..Temperature-induced opposite changes in the Brillouin frequency shift and in the birefringence-determined optical frequency deviation are clearly observed with 1.2 m spatial resolution and a 110 m measurement range...
  14. ncbi request reprint 25 GHz bandwidth Brillouin slow light in optical fibers
    Kwang Yong Song
    Department of Electronic Engineering, The University of Tokyo, Tokyo 113 8656, Japan
    Opt Lett 32:217-9. 2007
    ..The loss spectrum generated by one of the pump waves is fully compensated by the gain spectrum of the other one, which permits the enlargement of the bandwidth to 25 GHz and a variable time delay of up to 10.9 ps with 37 ps pulses...
  15. doi request reprint High-reflectivity-resolution coherent optical frequency domain reflectometry using optical frequency comb source and tunable delay line
    Zuyuan He
    Department of Electrical Engineering and Information Systems, The University of Tokyo 7 3 1 Hongo, Tokyo 113 8656, Japan
    Opt Express 19:B764-9. 2011
    ..Furthermore, by using this new method in combination with FSAV, better reflectivity-resolution is obtained compared to using only conventional FSAV with a single-wavelength laser source...
  16. ncbi request reprint Gain-assisted superluminal propagation in tellurite glass fiber based on stimulated Brillouin scattering
    Kwang Yong Song
    Dept of Physics, Chung Ang University, Seoul 156 756, Korea
    Opt Express 16:225-30. 2008
    ..19 is achieved with 6.9 dB amplification in 34 ns Gaussian pulses, leading to the group index of 0.84...