Prof. Nobuaki Takahashi Profile

Prof. Nobuaki Takahashi

Professor at Natl Defense Academy

SPIE Involvement:

Author

Publications (34)

Proceedings Article | 23 April 2017 Paper

Precise measurement technique of long period fiber grating sensors using Fourier transform method

Mayumi Nagatsuka, Masayoshi Koizumi, Satoshi Tanaka, Atsushi Wada, Nobuaki Takahashi

Proceedings Volume 10323, 103234O (2017) https://doi.org/10.1117/12.2265809

KEYWORDS: Sensors, Fiber optics sensors, Fourier transforms, Transmittance, Temperature metrology, Cladding, Signal attenuation, Phase shifts, Measurement devices, Channel projecting optics

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Proceedings Article | 23 April 2017 Paper

Simultaneous measurement of vibration and temperature using a Fabry-Perot interferometer in polarization maintaining fiber and laser diodes

Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 10323, 1032326 (2017) https://doi.org/10.1117/12.2263200

KEYWORDS: Temperature metrology, Sensors, Polarization, Semiconductor lasers, Fiber Bragg gratings, Interferometers, Fabry–Perot interferometry, Polarization maintaining fibers, Modulation, Transmittance

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Proceedings Article | 28 September 2015 Paper

Simultaneous multipoint strain measurement using cascaded long period fiber gratings

Satoshi Tanaka, Osamu Tsukida, Tang Ngo, Atsushi Wada, Nobuaki Takahashi

Proceedings Volume 9634, 96343Q (2015) https://doi.org/10.1117/12.2194685

KEYWORDS: Cladding, Sensors, Fourier transforms, Transmittance, Fiber optics sensors, Signal attenuation, Multiplexing, Fiber optics, Fabrication, Channel projecting optics

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Proceedings Article | 28 September 2015 Paper

Optical frequency domain reflectometry based fiber Bragg grating vibration sensor array using sinusoidal current modulation of laser diodes

Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 9634, 96341F (2015) https://doi.org/10.1117/12.2194688

KEYWORDS: Fiber Bragg gratings, Sensors, Modulation, Semiconductor lasers, Light sources, Signal detection, Photodetectors, Solids, Time metrology, Laser systems engineering

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Proceedings Article | 1 July 2015 Paper

Multipoint vibration sensing using fiber Bragg gratings and optical frequency domain reflectometry.

Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 9655, 96550U (2015) https://doi.org/10.1117/12.2185268

KEYWORDS: Fiber Bragg gratings, Sensors, Modulation, Semiconductor lasers, Light sources, Signal detection, Photodetectors, Solids, Time metrology, Laser systems engineering

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Proceedings Article | 1 July 2015 Paper

Temperature and strain measurement by using cascaded chirped long period fiber gratings

Thanh Tung Ngo, Osamu Tsukida, Satoshi Tanaka, Ryoutarou Uchimura, Atsushi Wada, Nobuaki Takahashi

Proceedings Volume 9655, 965537 (2015) https://doi.org/10.1117/12.2185241

KEYWORDS: Temperature metrology, Fourier transforms, Cladding, Signal attenuation, Transmittance, Phase shifts, Fiber optics tests, Fiber optics, Optical components, Fiber optic components

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Proceedings Article | 2 June 2014 Paper

Highly sensitive operation of intensity-based fiber-optic vibration sensor using cascaded long period fiber grating

Satoshi Tanaka, Osamu Tsukida, Makoto Takeuchi, Shingo Tekuramori, Ryotaro Uchimura, Atsushi Wada, Nobuaki Takahashi

Proceedings Volume 9157, 91571H (2014) https://doi.org/10.1117/12.2059466

KEYWORDS: Sensors, Transmittance, Fiber optics sensors, Cladding, Modulation, Signal attenuation, Fiber optics, Ferroelectric materials, Excimer lasers, Fabrication

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Proceedings Article | 2 June 2014 Paper

Performance of chirped-FBG Fabry-Perot interferometer sensor in pulse-position modulation scheme: large-signal operation

Shingo Tekuramori, Makoto Takeuchi, Ryotaro Uchimura, Osamu Tsukida, Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 9157, 91571B (2014) https://doi.org/10.1117/12.2059405

KEYWORDS: Sensors, Modulation, Fiber Bragg gratings, Fabry–Perot interferometry, Ferroelectric materials, Reflectivity, Laser Doppler velocimetry, Fabry–Perot interferometers, Optical fibers, Transmittance

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Proceedings Article | 2 June 2014 Paper

Simultaneous measurement of temperature and static strain using FBG Fabry-Perot interferometer in polarization maintaining fiber

R. Uchimura, A. Wada, S. Tekuramori, M. Takeuchi, O. Tukida, S. Tanaka, N. Takahashi

Proceedings Volume 9157, 91570U (2014) https://doi.org/10.1117/12.2058842

KEYWORDS: Temperature metrology, Sensors, Fiber Bragg gratings, Polarization, Transmittance, Fabry–Perot interferometry, Polarization maintaining fibers, Head, Refractive index, Single mode fibers

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Proceedings Article | 17 October 2012 Paper

Optical fiber sensing with chirped FBG Fabry-Perot interferometer: vibration measurement

K. Ikuma, A. Wada, S. Tanaka, K. Omichi, N. Takahashi

Proceedings Volume 8421, 84213R (2012) https://doi.org/10.1117/12.966349

KEYWORDS: Sensors, Fiber Bragg gratings, Fabry–Perot interferometry, Vibrometry, Modulation, Optical sensing, Ferroelectric materials, Optical fibers, Reflectors, Transmittance

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Proceedings Article | 17 October 2012 Paper

Experimental investigation of dynamic characteristics of wavelength of DFB-LD for FBG-FPI vibration sensor based on wavelength-to-time mapping

Atsushi Wada, Keisuke Ikuma, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 8421, 842151 (2012) https://doi.org/10.1117/12.975152

KEYWORDS: Fiber Bragg gratings, Sensors, Reflectivity, Modulation, Light sources, Fiber optics sensors, Current controlled current source, Cladding, Fabry–Perot interferometry, Mirrors

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Proceedings Article | 17 October 2012 Paper

Intensity-based LPG vibration sensor array using FBG and broadband optical source

S. Tanaka, A. Wada, K. Ikuma, N. Takahashi

Proceedings Volume 8421, 84213Y (2012) https://doi.org/10.1117/12.968202

KEYWORDS: Sensors, Fiber optics sensors, Fiber Bragg gratings, Multiplexing, Wavelength division multiplexing, Cladding, Signal attenuation, Transmittance, Light sources, Modulation

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Proceedings Article | 19 May 2011 Paper

Highly sensitive operation of LPG vibration sensor using bending-induced spectral change

Satohi Tanaka, Atsushi Wada, Nobuaki Takahashi

Proceedings Volume 7753, 77539Q (2011) https://doi.org/10.1117/12.885055

KEYWORDS: Signal attenuation, Sensors, Modulation, Cladding, Transmittance, Fiber Bragg gratings, Tunable lasers, Light, Fiber optics sensors, Spectrum analysis

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Proceedings Article | 18 May 2011 Paper

FBG-based vibration measurement of rotating structure using optical fiber rotary joint

Nobuaki Takahashi, Satohi Tanaka, Atsushi Wada

Proceedings Volume 7753, 77537U (2011) https://doi.org/10.1117/12.884937

KEYWORDS: Fiber Bragg gratings, Sensors, Vibrometry, Optical fibers, Fiber lasers, Wavelength division multiplexing, Multiplexing, Fiber optics sensors, Modulation, Structured optical fibers

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Proceedings Article | 18 May 2011 Paper

High performance interrogation of long period fiber grating sensor with wavelength scanning and Fourier analysis

Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 7753, 77536K (2011) https://doi.org/10.1117/12.885046

KEYWORDS: Sensors, Fiber optics sensors, Temperature metrology, Cladding, Signal attenuation, Light sources, Fiber Bragg gratings, Fourier transforms, Modulation, Sensing systems

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Proceedings Article | 9 September 2010 Paper

Optical vibration sensor using FBG Fabry-Perot interferometer with wavelength scanning and Fourier analysis

Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 7653, 765313 (2010) https://doi.org/10.1117/12.866293

KEYWORDS: Fiber Bragg gratings, Modulation, Sensors, Reflectivity, Photodetectors, Light sources, Fabry–Perot interferometry, Signal detection, Ferroelectric materials, Signal processing

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Proceedings Article | 5 October 2009 Paper

High-sensitivity vibration sensing using in-fiber Fabry-Perot interferometer with fiber-Bragg-grating reflectors

Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 7503, 75033L (2009) https://doi.org/10.1117/12.834166

KEYWORDS: Fiber Bragg gratings, Reflectivity, Fabry–Perot interferometry, Reflectors, Sensors, Optical fibers, Current controlled current source, Light sources, Ferroelectric materials, Photodetectors

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Proceedings Article | 5 October 2009 Paper

Sensitivity enhancement of LPG vibration sensor using higher-order cladding mode

S. Tanaka, H. Somatomo, A. Wada, N. Takahashi

Proceedings Volume 7503, 75033C (2009) https://doi.org/10.1117/12.834167

KEYWORDS: Sensors, Signal attenuation, Cladding, Modulation, Fiber Bragg gratings, Fiber optics sensors, Light, Tunable lasers, Ferroelectric materials, Vibrometry

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Proceedings Article | 5 October 2009 Paper

Fiber bragg grating hydrophone array using multi-wavelength laser: simultaneous multipoint underwater acoustic detection

S. Tanaka, A. Wada, N. Takahashi

Proceedings Volume 7503, 75031S (2009) https://doi.org/10.1117/12.834235

KEYWORDS: Fiber Bragg gratings, Sensors, Acoustics, Fiber lasers, Wavelength division multiplexing, Transducers, Velocity measurements, Tunable lasers, Modulation, Fiber optics sensors

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Proceedings Article | 16 May 2008 Paper

Vibration sensing of solid using long-period fiber grating

Hiroyuki Somatomo, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 7004, 70042J (2008) https://doi.org/10.1117/12.785961

KEYWORDS: Sensors, Fiber Bragg gratings, Cladding, Solids, Transmittance, Signal attenuation, Chemical elements, Optical components, Actuators, Single mode fibers

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Proceedings Article | 16 May 2008 Paper

Triple wavelength SOA-based fiber ring laser for use in wavelength-division multiplexed FBG vibration sensor array

S. Tanaka, H. Somatomo, K. Inamoto, N. Takahashi

Proceedings Volume 7004, 70040F (2008) https://doi.org/10.1117/12.785981

KEYWORDS: Fiber Bragg gratings, Sensors, Fiber lasers, Wavelength division multiplexing, Signal detection, Multiplexing, Tunable lasers, Fiber optics sensors, Ferroelectric materials, Semiconductor optical amplifiers

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Proceedings Article | 23 May 2005 Paper

Temperature-stabilized fiber Bragg grating underwater acoustic sensor array using incoherent light

Satoshi Tanaka, Hiroki Yokosuka, Nobuaki Takahashi

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623418

KEYWORDS: Fiber Bragg gratings, Sensors, Acoustics, Reflectivity, Signal detection, Light sources, Multiplexing, Ferroelectric materials, Modulation, Solids

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Proceedings Article | 23 May 2005 Paper

High-sensitive fiber Bragg grating vibration sensor using intensity-modulated laser source

Hiroki Yokosuka, Satoshi Tanaka, Nobuaki Takahashi

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623435

KEYWORDS: Fiber Bragg gratings, Sensors, Ferroelectric materials, Laser sources, Optical amplifiers, Modulators, Signal to noise ratio, Solids, Modulation, Tunable lasers

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Proceedings Article | 12 April 2005 Paper

Simultaneous measurement of vibration and temperature with fiber Bragg grating

Nobuaki Takahashi, Hiroki Yokosuka, Satoshi Tanaka

Proceedings Volume 5852, (2005) https://doi.org/10.1117/12.621508

KEYWORDS: Fiber Bragg gratings, Sensors, Temperature metrology, Transmittance, Signal detection, Modulation, Photodiodes, Environmental sensing, Calibration, Signal to noise ratio

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Proceedings Article | 17 June 2003 Paper

Direct distribution of lasing power into multioptical fibers: theoretical estimates

Satoshi Tanaka, Nobuaki Takahashi, Heihachi Sato

Proceedings Volume 5129, (2003) https://doi.org/10.1117/12.502171

KEYWORDS: Optical fibers, Transmittance, Mirrors, Carbon dioxide lasers, Estimation theory, Optical sensors, Laser resonators, Metrology, Optical components, Optical mounts

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Proceedings Article | 17 June 2003 Paper

Numerical analysis of lasing output in organic thin film laser with photo-induced periodic gain structure

Satoshi Tanaka, Hieu Ta, Hyuma Itakura, Heihachi Sato, Akira Watanabe, Seiichirou Hayakawa, Nobuaki Takahashi

Proceedings Volume 5129, (2003) https://doi.org/10.1117/12.502168

KEYWORDS: Visibility, Numerical analysis, Thin films, Polymers, Oscillators, Solid state lasers, Solid state physics, Organic materials, Optical amplifiers, Rhodamine B

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Proceedings Article | 9 September 2002 Paper

Temperature stabilization of fiber Bragg grating vibration sensor with automatic wavelength control

Nobuaki Takahashi, Weerapong Thongnum, Sumio Takahashi

Proceedings Volume 4920, (2002) https://doi.org/10.1117/12.481986

KEYWORDS: Fiber Bragg gratings, Sensors, Temperature metrology, Transmittance, Environmental sensing, Signal detection, Automatic control, Reflectivity, Mechanical sensors, Semiconductor lasers

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Proceedings Article | 8 August 2001 Paper

Vibration sensing with fiber Bragg grating

Nobuaki Takahashi, Kazuto Yoshimura, Sumio Takahashi

Proceedings Volume 4513, (2001) https://doi.org/10.1117/12.435872

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Proceedings Article | 8 May 2001 Paper

FBG vibration sensor based on intensity-modulation method with incoherent light

Nobuaki Takahashi, Kazuto Yoshimura, Sumio Takahashi

Proceedings Volume 4416, (2001) https://doi.org/10.1117/12.427011

KEYWORDS: Sensors, Fiber Bragg gratings, Signal detection, Light, Optical sensors, Optical amplifiers, Optical filters, Reflectivity, Environmental sensing, Fiber amplifiers

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Proceedings Article | 9 November 2000 Paper

Sensing of ultrasonic vibration with fiber Bragg grating

Nobuaki Takahashi

Proceedings Volume 4185, 41851I (2000) https://doi.org/10.1117/12.2302197

KEYWORDS: Fiber Bragg gratings, Sensors, Signal detection, Ultrasonics, Ferroelectric materials, Reflectivity, Reflection, Light sources, Solids, Mechanical sensors

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Proceedings Article | 1 September 1999 Paper

Fiber Bragg grating underwater acoustic sensor

Nobuaki Takahashi

Proceedings Volume 3746, 37462U (1999) https://doi.org/10.1117/12.2302092

KEYWORDS: Acoustics, Sensors, Fiber Bragg gratings, Signal detection, Wavelength division multiplexing, Fiber optics sensors, Transmittance, Phase measurement, Ferroelectric materials, Transducers

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Proceedings Article | 7 May 1999 Paper

Multipoint detection of an acoustic wave in water with a WDM fiber-Bragg-grating sensor

Nobuaki Takahashi, Kanta Tetsumura, Sumio Takahashi

Proceedings Volume 3740, (1999) https://doi.org/10.1117/12.347815

KEYWORDS: Acoustics, Fiber Bragg gratings, Sensors, Wavelength division multiplexing, Signal detection, Fiber optics sensors, Spatial resolution, Optical fibers, Semiconductor lasers, Photodiodes

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Proceedings Article | 3 February 1999 Paper

Fiber Bragg grating WDM underwater acoustic sensor with directivity

Nobuaki Takahashi, Kanta Tetsumura, Kazuo Imamura, Sumio Takahashi

Proceedings Volume 3541, (1999) https://doi.org/10.1117/12.339083

KEYWORDS: Fiber Bragg gratings, Acoustics, Sensors, Wavelength division multiplexing, Transmittance, Photodiodes, Fiber optics sensors, Optical isolators, Multiplexing, Modulation

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