The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Sverre Lidholm - One of the best experts on this subject based on the ideXlab platform.
-
ECCTD - A circular voltage-controlled Phase shifter with unlimited Phase range for Phase tracking loops
2007 18th European Conference on Circuit Theory and Design, 2007Co-Authors: Byungjin Chun, Zheyao Zhang, Sverre LidholmAbstract:A circular voltage-controlled Phase shifter (VCPS) is proposed to extend the range of the controlled Output Phase shift unlimitedly. This is made possible by configuring the system to operate in a circular way, differently from the conventional VCPS whose Output Phase saturates as the Phase control input exceeds some value. The circular VCPS is based on a vector modulation method whose modulation signals are generated in a pseudo-sinusoidal way exploiting the current-voltage (I-V) curve of a MOS differential amplifier pair. When the circular VCPS is employed in Phase tracking loops, the loop can operate in a stand-alone way thanks to its unlimited Phase shifting capability.
-
A circular voltage-controlled Phase shifter with unlimited Phase range for Phase tracking loops
2007 18th European Conference on Circuit Theory and Design, 2007Co-Authors: Byungjin Chun, Zheyao Zhang, Sverre LidholmAbstract:A circular voltage-controlled Phase shifter (VCPS) is proposed to extend the range of the controlled Output Phase shift unlimitedly. This is made possible by configuring the system to operate in a circular way, differently from the conventional VCPS whose Output Phase saturates as the Phase control input exceeds some value. The circular VCPS is based on a vector modulation method whose modulation signals are generated in a pseudo-sinusoidal way exploiting the current-voltage (I-V) curve of a MOS differential amplifier pair. When the circular VCPS is employed in Phase tracking loops, the loop can operate in a stand-alone way thanks to its unlimited Phase shifting capability.
Kyo Inoue - One of the best experts on this subject based on the ideXlab platform.
-
Phase-insensitive fiber parametric amplifier system with clamped Output Phase
2015 Conference on Lasers and Electro-Optics (CLEO), 2015Co-Authors: Kyo InoueAbstract:This paper proposes a Phase-insensitive fiber parametric amplifier system that Outputs a Phase-clamped signal. It consists of an orthogonally pumped fiber with polarization-aligned signal input and a fiber loop with a polarization beam splitter.
-
Polarization or Phase insensitive fiber parametric amplifier with clamped Output Phase.
Optics Express, 2015Co-Authors: Kyo InoueAbstract:This paper proposes a low polarization- or Phase-dependent fiber parametric amplifier system with a clamped Output Phase, which consists of an orthogonally pumped nonlinear fiber and a fiber loop with a polarization beam splitter. Numerical calculations show that the proposed system exhibits a constant Output Phase, low insensitive to the signal input Phase or polarization state.
-
Phase-sensitive amplification in loop configuration for QPSK signal regeneration
CLEO: 2013, 2013Co-Authors: Kyo Inoue, Shouma OkazakiAbstract:Phase-sensitive amplification in a loop configuration with two pump lights is described. Its Output Phase has a stepwise transfer function with a step difference of π/2, which can be used for regenerating QPSK signals.
-
Phase-Sensitive Amplification in Fiber-Loop for QPSK Signal Regeneration
CLEO: 2013, 2013Co-Authors: Kyo Inoue, Shouma OkazakiAbstract:Phase-sensitive amplification in a loop configuration with two pump lights is described. Its Output Phase has a stepwise transfer function with a step difference of π/2, which can be used for regenerating QPSK signals.
Byungjin Chun - One of the best experts on this subject based on the ideXlab platform.
-
ECCTD - A circular voltage-controlled Phase shifter with unlimited Phase range for Phase tracking loops
2007 18th European Conference on Circuit Theory and Design, 2007Co-Authors: Byungjin Chun, Zheyao Zhang, Sverre LidholmAbstract:A circular voltage-controlled Phase shifter (VCPS) is proposed to extend the range of the controlled Output Phase shift unlimitedly. This is made possible by configuring the system to operate in a circular way, differently from the conventional VCPS whose Output Phase saturates as the Phase control input exceeds some value. The circular VCPS is based on a vector modulation method whose modulation signals are generated in a pseudo-sinusoidal way exploiting the current-voltage (I-V) curve of a MOS differential amplifier pair. When the circular VCPS is employed in Phase tracking loops, the loop can operate in a stand-alone way thanks to its unlimited Phase shifting capability.
-
A circular voltage-controlled Phase shifter with unlimited Phase range for Phase tracking loops
2007 18th European Conference on Circuit Theory and Design, 2007Co-Authors: Byungjin Chun, Zheyao Zhang, Sverre LidholmAbstract:A circular voltage-controlled Phase shifter (VCPS) is proposed to extend the range of the controlled Output Phase shift unlimitedly. This is made possible by configuring the system to operate in a circular way, differently from the conventional VCPS whose Output Phase saturates as the Phase control input exceeds some value. The circular VCPS is based on a vector modulation method whose modulation signals are generated in a pseudo-sinusoidal way exploiting the current-voltage (I-V) curve of a MOS differential amplifier pair. When the circular VCPS is employed in Phase tracking loops, the loop can operate in a stand-alone way thanks to its unlimited Phase shifting capability.
M. Lopez-amo - One of the best experts on this subject based on the ideXlab platform.
-
Interrogation of wavelength multiplexed fiber Bragg gratings using spectral filtering and amplitude-to-Phase optical conversion
Journal of Lightwave Technology, 2003Co-Authors: S. Abad, F.m. Araujo, L.a. Ferreira, J.l. Santos, M. Lopez-amoAbstract:A technique for interrogating multiplexed FBG sensors using all-fiber low-cost devices is demonstrated. It is based on spectral filtering employing a fused biconical wavelength-division multiplexer and on amplitude-to-Phase optical conversion to perform power referencing. Four FBG sensors are wavelength multiplexed in the network, and a 3-nm-wide tunable optical filter is employed at the detection block for sensor demultiplexing. With this technique an operation range of more than 2 nm is demonstrated for the sensors with achievable wavelength static resolution ranging from 1.9 to 13.4 pm/Hz12/ with no observable hysteresis. As for power referencing, the system is proven to be unaffected by power variations as high as 75% of the total power launched by the source. Finally, Output-Phase variations due to crosstalk are shown to be under 1% of the total Output Phase range, with more than 29-dB optical isolation between channels.
Shouma Okazaki - One of the best experts on this subject based on the ideXlab platform.
-
Phase-sensitive amplification in loop configuration for QPSK signal regeneration
CLEO: 2013, 2013Co-Authors: Kyo Inoue, Shouma OkazakiAbstract:Phase-sensitive amplification in a loop configuration with two pump lights is described. Its Output Phase has a stepwise transfer function with a step difference of π/2, which can be used for regenerating QPSK signals.
-
Phase-Sensitive Amplification in Fiber-Loop for QPSK Signal Regeneration
CLEO: 2013, 2013Co-Authors: Kyo Inoue, Shouma OkazakiAbstract:Phase-sensitive amplification in a loop configuration with two pump lights is described. Its Output Phase has a stepwise transfer function with a step difference of π/2, which can be used for regenerating QPSK signals.