Results 71 to 80 of about 1,683,790 (202)
Persistent Rabi oscillations probed via low-frequency noise correlation
, 2010 The qubit Rabi oscillations are known to be non-decaying (though with a fluctuating phase) if the qubit is continuously monitored in the weak-coupling regime.
Alexander N. Korotkov +2 more
core +1 more source
Convergence of phase noise in DPSK transmission systems by novel phase noise averagers
Optics Express, 2006 This investigation proposes a novel all-optical phase noise averager to reduce residual phase noise in the differential phase-shift keying (DPSK) transmission system with phase-preserving amplitude regenerators. The proposed phase noise averager is based on a phase-sensitive amplifier but does not require an extra phase-locking optical pump beam.
Chia Chien, Wei, Jason Jyehong, Chen
openaire +2 more sources
Improved weighted least-squares phase unwrapping method for interferometric SAR processing
The Journal of Engineering, 2019 Based on the study of existed least-squares and weighted least-squares phase unwrapping methods, an improved weighted least-squares algorithm based on unwrapping phase error compensation is proposed.
Yu Hui +5 more
doaj +1 more source
, 2014 The sensitivity of homodyne timing measurements with femtosecond lasers is only limited by the amplitude and phase noise. We describe a novel method to analyze the phase noise of a Ti:Sapph oscillator relative to the standard quantum limit. The broadband
Fabre, Claude +4 more
core +2 more sources
Simplified Laser Frequency Noise Measurement Using the Delayed Self-Heterodyne Method
PhotonicsHere, we report on a simplified laser frequency noise measurement technique employing an acousto-optic modulator, a delay line, and a real-time oscilloscope. The technique is a slight modification of the typical delayed heterodyne method.
Seán P. Ó Dúill, Liam P. Barry
doaj +1 more source
Phase Noise Compensation for Nonlinearity-Tolerant Digital Subcarrier Systems With High-Order QAM
IEEE Photonics Journal, 2017 The fundamental penalty of subcarrier modulation (SCM) with independent subcarrier phase noise processing is estimated. It is shown that the fundamental signal-to-noise ratio (SNR) penalty related to poorer phase noise tolerance of decreased baudrate ...
M. P. Yankov, L. Barletta, D. Zibar
doaj +1 more source
Frequency Precision of Oscillators Based on High-Q Resonators [PDF]
, 2015 We present a method for analyzing the phase noise of oscillators based on feedback driven high quality factor resonators. Our approach is to derive the phase drift of the oscillator by projecting the stochastic oscillator dynamics onto a slow time scale ...
Cross, M. C., Kenig, Eyal
core +1 more source
IEEE Photonics Journal, 2018 We propose a simplified digital phase noise compensation technique for a Nyquist pulse-shaped digital subcarrier multiplexed (DSCM) coherent optical transmission system, employing an optical frequency comb based on Quantum dot passive mode-locked laser ...
Govind Vedala +2 more
doaj +1 more source
IEEE Photonics Journal, 2019 We experimentally investigate the noise properties of a homemade 586 MHz mode-locked laser (MLL). The variation of the timing jitter versus the harmonic order is measured, which is consistent with the theoretical analyses.
Jiazheng Song +6 more
doaj +1 more source
Noise performance of frequency modulation Kelvin force microscopy
Beilstein Journal of Nanotechnology, 2014 Noise performance of a phase-locked loop (PLL) based frequency modulation Kelvin force microscope (FM-KFM) is assessed. Noise propagation is modeled step by step throughout the setup using both exact closed loop noise gains and an approximation known as “
Heinrich Diesinger +2 more
doaj +1 more source