The Experts below are selected from a list of 108 Experts worldwide ranked by ideXlab platform
Yuko Hanado - One of the best experts on this subject based on the ideXlab platform.
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Phase coherent transfer and retrieval of terahertz frequency standard via Optical Fiber with 10 −18 -level accuracy and stability
2017 42nd International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2017Co-Authors: Shigeo Nagano, Motohiro Kumagai, Hiroyuki Ito, Masatoshi Kajita, Yuko HanadoAbstract:We demonstrate a THz frequency reference transfer over a 20 km Optical Fiber with accuracy and stability at the level. Phase information of the THz frequency standard is coherently duplicated onto an Optical carrier as an intermediary for exploiting Low-Loss Optical-Fiber technology. The transferred information on the Optical carrier is retrieved into the THz domain again without phase decoherence. This THz reference transfer can be applied for the remote frequency calibration of diverse instruments working in the THz region.
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Phase-coherent transfer and retrieval of terahertz frequency standard over 20 km Optical Fiber with 4 × 10−18 accuracy
Applied Physics Express, 2016Co-Authors: Shigeo Nagano, Motohiro Kumagai, Hiroyuki Ito, Masatoshi Kajita, Yuko HanadoAbstract:We demonstrate a terahertz (THz) frequency reference transfer with high accuracy and stability. Phase information of the THz frequency standard is coherently duplicated onto an Optical carrier as an intermediary for exploiting Low-Loss Optical-Fiber technology. The transferred information on the Optical carrier is retrieved into the THz domain without phase decoherence. The THz reference transfer system, which comprises frequency-comb-based THz-to-Optical and Optical-to-THz synthesizers connected by a 20 km phase-noise-compensated Fiber, is operated with 4 × 10−18 fractional frequency accuracy at 0.3 THz. This THz reference transfer is available for the remote frequency calibration of diverse instruments working in the THz region.
Jason Hurley - One of the best experts on this subject based on the ideXlab platform.
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Ultra-Low-Loss Optical Fiber enabling purely passive 10 Gb/s PON systems with 100 km length.
Optics express, 2009Co-Authors: John D. Downie, A. Boh Ruffin, Jason HurleyAbstract:We demonstrate time division multiplexing (TDM) and wavelength division multiplexing/TDM (WDM/TDM) long reach 10 Gb/s passive Optical network (PON) architectures of 100 km reach with no infield amplification or dispersion compensation. The purely passive nature of the 100 km systems is enabled by the use of ultra-Low-Loss Optical Fiber with average attenuation of 0.17 dB/km and downstream transmission with a 10 Gb/s signal modulated with the duobinary format. The high tolerance of duobinary to dispersion, stimulated Brillouin scattering (SBS), and self-phase modulation (SPM) are all key factors to achieving good system performance at this distance, as is the significantly reduced loss from the ultra-Low-Loss Fiber. We show that this combination of Fiber and downstream signal format allow split ratios up to 1:128 for both system architectures. The achievable split ratio is reduced for standard single-mode Fiber and/or use of an NRZ modulated downstream signal. Standard strength forward error correction (FEC) is used for the WDM/TDM system but is not required for the TDM system.
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Purely Passive Long Reach 10 GE-PON Architecture Based on Duobinary Signals and Ultra-Low Loss Optical Fiber
OFC NFOEC 2008 - 2008 Conference on Optical Fiber Communication National Fiber Optic Engineers Conference, 2008Co-Authors: A Boh Ruiiin, John D. Downie, Jason HurleyAbstract:We experimentally explore long reach PON architectures of 100 km with no in-field amplification using 10.3125 Gb/s duobinary downstream signals and ultra-low loss Optical Fiber. We demonstrate error-free transmission with split ratios up to 1×128.
John D. Downie - One of the best experts on this subject based on the ideXlab platform.
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High-capacity long-haul transmission using ultra-low loss Optical Fiber
2012 17th Opto-Electronics and Communications Conference, 2012Co-Authors: John D. DownieAbstract:Increasing OSNR requirements for high bit rate signals and multi-level modulation formats drive the need for new Optical Fiber with ultra-low loss and large effective area. We present recent transmission results with Fibers of this type.
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Ultra-Low-Loss Optical Fiber enabling purely passive 10 Gb/s PON systems with 100 km length.
Optics express, 2009Co-Authors: John D. Downie, A. Boh Ruffin, Jason HurleyAbstract:We demonstrate time division multiplexing (TDM) and wavelength division multiplexing/TDM (WDM/TDM) long reach 10 Gb/s passive Optical network (PON) architectures of 100 km reach with no infield amplification or dispersion compensation. The purely passive nature of the 100 km systems is enabled by the use of ultra-Low-Loss Optical Fiber with average attenuation of 0.17 dB/km and downstream transmission with a 10 Gb/s signal modulated with the duobinary format. The high tolerance of duobinary to dispersion, stimulated Brillouin scattering (SBS), and self-phase modulation (SPM) are all key factors to achieving good system performance at this distance, as is the significantly reduced loss from the ultra-Low-Loss Fiber. We show that this combination of Fiber and downstream signal format allow split ratios up to 1:128 for both system architectures. The achievable split ratio is reduced for standard single-mode Fiber and/or use of an NRZ modulated downstream signal. Standard strength forward error correction (FEC) is used for the WDM/TDM system but is not required for the TDM system.
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Purely Passive Long Reach 10 GE-PON Architecture Based on Duobinary Signals and Ultra-Low Loss Optical Fiber
OFC NFOEC 2008 - 2008 Conference on Optical Fiber Communication National Fiber Optic Engineers Conference, 2008Co-Authors: A Boh Ruiiin, John D. Downie, Jason HurleyAbstract:We experimentally explore long reach PON architectures of 100 km with no in-field amplification using 10.3125 Gb/s duobinary downstream signals and ultra-low loss Optical Fiber. We demonstrate error-free transmission with split ratios up to 1×128.
Axel Schülzgen - One of the best experts on this subject based on the ideXlab platform.
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Photo-Thermo-Refractive Glass Fibers
Workshop on Specialty Optical Fibers and their Applications, 2013Co-Authors: Peter Hofmann, Rodrigo Amezcua-correa, Enrique Antonio-lopez, Daniel Ott, Marc Segall, Ivan Divliansky, Larissa Glebova, Leonid B. Glebov, Axel SchülzgenAbstract:We demonstrate the first Low-Loss Optical Fiber made from photo-thermo-refractive (PTR) glass. Fiber Bragg gratings with efficiencies exceeding 99% were recorded and did not deteriorate after 12 hour exposure to temperatures above 400 °C.
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Strong and robust Bragg gratings in photo-thermo-refractive glass Fiber
CLEO: 2013, 2013Co-Authors: Peter Hofmann, Rodrigo Amezcua-correa, Enrique Antonio-lopez, Daniel Ott, Marc Segall, Ivan Divliansky, Larissa Glebova, Leonid B. Glebov, Clemence Jollivet, Axel SchülzgenAbstract:We demonstrate strong and robust Fiber Bragg gratings in the first Low-Loss Optical Fiber made from photo-thermo-refractive (PTR) glass. A high grating strength of 20 dB is maintained even at 12 hour exposure to temperatures above 400 °C.
Shigeo Nagano - One of the best experts on this subject based on the ideXlab platform.
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Phase coherent transfer and retrieval of terahertz frequency standard via Optical Fiber with 10 −18 -level accuracy and stability
2017 42nd International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2017Co-Authors: Shigeo Nagano, Motohiro Kumagai, Hiroyuki Ito, Masatoshi Kajita, Yuko HanadoAbstract:We demonstrate a THz frequency reference transfer over a 20 km Optical Fiber with accuracy and stability at the level. Phase information of the THz frequency standard is coherently duplicated onto an Optical carrier as an intermediary for exploiting Low-Loss Optical-Fiber technology. The transferred information on the Optical carrier is retrieved into the THz domain again without phase decoherence. This THz reference transfer can be applied for the remote frequency calibration of diverse instruments working in the THz region.
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Phase-coherent transfer and retrieval of terahertz frequency standard over 20 km Optical Fiber with 4 × 10−18 accuracy
Applied Physics Express, 2016Co-Authors: Shigeo Nagano, Motohiro Kumagai, Hiroyuki Ito, Masatoshi Kajita, Yuko HanadoAbstract:We demonstrate a terahertz (THz) frequency reference transfer with high accuracy and stability. Phase information of the THz frequency standard is coherently duplicated onto an Optical carrier as an intermediary for exploiting Low-Loss Optical-Fiber technology. The transferred information on the Optical carrier is retrieved into the THz domain without phase decoherence. The THz reference transfer system, which comprises frequency-comb-based THz-to-Optical and Optical-to-THz synthesizers connected by a 20 km phase-noise-compensated Fiber, is operated with 4 × 10−18 fractional frequency accuracy at 0.3 THz. This THz reference transfer is available for the remote frequency calibration of diverse instruments working in the THz region.
