Tuesday, 20 September, 2011
16:45 -- 18:30
Le Cervin

Tu.6.LeCervin • Metrology and Sensing

Chair: Patrice Megret; Université de Mons Belgium
Tu.6.LeCervin.1 • 16:45 (Invited)
Plastic fibers for terahertz wave guiding
Bora Ung1, Anna Mazhorova1, Mathieu Rozé1, Alexandre Dupuis1, Maksim Skorobogatiy1; 1Engineering physics, Ecole Polytechnique de Montral, Canada.
Polymer optical fibers provide a cost-effective, design flexible, and industry-scalable platform for THz waveguides. We here review the latest developments in the design, fabrication and characterization of plastic-based optical fibers for the terahertz.
Tu.6.LeCervin.2 • 17:15
Brillouin echo-distributed sensing based on differential phase-shift keying technique
Min W. Lee1, Birgit Stiller1, Jerome Hauden2, Hervé Maillotte1, Luc Thevenaz3, Thibaut Sylvestre1; 1Department of Optics, Institut FEMTO-ST, France; 2Photline Technologies, France; 3Institute of Electrical Engineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland.
In this letter, we demonstrate experimentally Brillouin echo-distributed sensing based on differential phase-shift keying technique. A positive and negative pulse is applied to a single Mach-Zehnder modulator to achieve a resolution of 5 cm.
Tu.6.LeCervin.3 • 17:30
Fading-noise suppressed OFDR using optical frequency comb source and tunable delay line
Takushi Kazama1, Zuyuan He1, Yusuke Koshikiya2, Xinyu Fan2, Fumihiko Ito2, Kazuo Hotate1; 1Department of Electrical Engineering and Information Systems, University of Tokyo, Japan; 2NTT Access Network Service Systems Laboratories, NTT Corporation, Japan.
A delay shift averaging optical frequency domain reflectometry using optical frequency comb source and tunable delay line to suppress the fading noise is proposed. Better reflectivity-resolution is demonstrated compared to using a single-wavelength laser.
Tu.6.LeCervin.4 • 17:45
Analysis of the beat noise induced by the lock-in detection in Brillouin optical correlation domain analysis
Jiho Jeong1,2, Kwanil Lee1, Kwang-Yong Song3, Je-Myung Jeong2, Sang-Bae Lee1; 1Photonics Research Laboratory, Korea Institute of Science and Technology (KIST), Republic of Korea; 2Optical Communication Laboratory, Division of Electrical and Computer Engineering, Hanyang University, Republic of Korea; 3Physics, Chung-Ang University, Republic of Korea.
We present a theoretical and experimental noise analysis of a Brillouin optical correlation domain analysis method. Also a variable-frequency lock-in detection technique is suggested as an effective way of the noise suppression.
Tu.6.LeCervin.5 • 18:00
An ultra-tiny fiber probe Bragg grating temperature sensor
Jun-long Kou1, Jing Feng1, Fei Xu1,2, Yan-qing Lu1; 1College of Engineering and Applied Sciences, Nanjing University, China; 2Nanjing University High-Tech Institute at Suzhou, China.
We experimentally demonstrate an all-silica microfiber Bragg grating for high-temperature sensing by focused ion beam machining in a tapered fiber probe with a sharp profile. This 11-period FBG is ultra-tiny with deep grooves and high efficiency. Its temperature sensitivity is ~ 22 pm/°C near the wavelength of 1570 nm.
Tu.6.LeCervin.6 • 18:15
Field trial of cm-level resolution PNC-OFDR for identifying high-birefringence section
Xinyu Fan1, Yusuke Koshikiya1, Keiji Okamoto1, Hiroyuki Iida1, Hiroshi Takahashi1, Fumihiko Ito1; 1Access Network Service Systems Laboratories, NTT, Japan.
PNC-OFDR is tested in a field environment for the first time. A spatial resolution of 5 cm at 39.2 km is confirmed, which makes it possible to identify a high-birefringence section with a very short beat length.