oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Nanosecond-scale timing jitter in transition edge sensors at telecom and visible wavelengths  [PDF]
Antia Lamas-Linares,Brice Calkins,Nathan A. Tomlin,Thomas Gerrits,Adriana E. Lita,Joern Beyer,Richard P. Mirin,Sae Woo Nam
Physics , 2012, DOI: 10.1063/1.4809731
Abstract: Transition edge sensors (TES) have the highest reported efficiencies (>98%) for detection of single photons in the visible and near infrared. Experiments in quantum information and foundations of physics that rely critically on this efficiency have started incorporating these detectors into con- ventional quantum optics setups. However, their range of applicability has been hindered by slow operation both in recovery time and timing jitter. We show here how a conventional tungsten-TES can be operated with jitter times of < 4 ns, well within the timing resolution necessary for MHz clocking of experiments, and providing an important practical simplification for experiments that rely on the simultaneous closing of both efficiency and locality loopholes.
High-efficiency and low-jitter Silicon single-photon avalanche diodes based on nanophotonic absorption enhancement  [PDF]
Jian Ma,Ming Zhou,Zongfu Yu,Xiao Jiang,Yijie Huo,Kai Zang,Jun Zhang,James S. Harris,Ge Jin,Qiang Zhang,Jian-Wei Pan
Physics , 2015,
Abstract: Silicon single-photon avalanche diode (SPAD) is a core device for single-photon detection in the visible and the near-infrared range, and widely used in many applications. However, due to limits of the structure design and device fabrication for current silicon SPADs, the key parameters of detection befficiency and timing jitter are often forced to compromise. Here, we propose a nanostructured silicon SPAD, which achieves high detection efficiency with excellent timing jitter simultaneously over a broad spectral range. The optical and electric simulations show significant performance enhancement compared with conventional silicon SPAD devices. This nanostructured devices can be easily fabricated and thus well suited for practical applications.
Few-photon imaging at 1550 nm using a low-timing-jitter superconducting nanowire single-photon detector  [PDF]
H. Zhou,Y. He,L. You,S. Chen,W. Zhang,J. Wu,Z. Wang,X. Xie
Physics , 2015,
Abstract: We demonstrated a laser depth imaging system based on the time-correlated single-photon counting technique, which was incorporated with a low-jitter superconducting nanowire single-photon detector (SNSPD), operated at the wavelength of 1550 nm. A sub-picosecond time-bin width was chosen for photon counting, resulting in a discrete noise of less than one/two counts for each time bin under indoor/outdoor daylight conditions, with a collection time of 50 ms. Because of the low-jitter SNSPD, the target signal histogram was significantly distinguishable, even for a fairly low retro-reflected photon flux. The depth information was determined directly by the highest bin counts, instead of using any data fitting combined with complex algorithms. Millimeter resolution depth imaging of a low-signature object was obtained, and more accurate data than that produced by the traditional Gaussian fitting method was generated. Combined with the intensity of the return photons, three-dimensional reconstruction overlaid with reflectivity data was realized.
Experimental study on the timing jitter of gain-switched laser diodes with photon injection
增益开关半导体激光器在外光注入下脉冲抖动的实验研究

Wang Yun-Cai,
王云才

物理学报 , 2003,
Abstract: A gain-switched laser diode (LD) was used as an external pulse injection source to reduce the timing jitter of gain-switched Fabry-Perot and DFB LDs. The low j itter and frequency-independent optical pulse can be achieved using this techniq ue. Phase noise measurement shows that with external pulse injection, the timing jitter of gain-switched FP LD was reduced from 1.2ps to 830fs and the timing ji tter of gain-switched DFB was reduced from 12ps to 1.2ps.
Maximum-Likelihood Detection of Soliton with Timing Jitter  [PDF]
Keang-Po Ho
Physics , 2004, DOI: 10.1364/JOSAB.22.002164
Abstract: Using the maximum-likelihood detector (MLD) of a soliton with timing jitter and noise, other than walk-out of the bit interval, timing jitter does not degrade the performance of MLD. When the MLD is simulated with important sampling method, even with a timing jitter standard deviation the same as the full-width-half-maximum (FWHM) of the soliton, the signal-to-noise (SNR) penalty is just about 0.2 dB. The MLD performs better than conventional scheme to lengthen the decision window with additive noise proportional to the window wide.
Soliton-like pulse timing jitter in dispersion-managed systems
Li Qi-Liang,Li Qing-Shan,Lin Li-Bin,
李齐良
,李庆山,林理彬

中国物理 B , 2006,
Abstract: In this paper, the timing jitter in dispersion-managed soliton-like systems with the Gaussian pulse is studied by using two methods. Firstly, the derivation of the dynamic equations for the evolution of soliton-like parameters and the timing jitter expressions for the dispersion-managed soliton-like systems are carried out by the perturbed variational method. By analysing and simulating these timing jitter expressions, one can find that the timing jitter is induced by the amplified spontaneous emission noise and the frequency shift, etc. Nonlinear gain can suppress the timing jitter. The chirp sign and the filters action have also effects on the total timing jitter. Secondly, the timing jitter is calculated and analysed by using the moment method. The results of the two methods prove to be consistent with each other.
Non-Gaussian Statistics of the Soliton Timing Jitter due to Amplifier Noise  [PDF]
Keang-Po Ho
Physics , 2003, DOI: 10.1364/OL.28.002165
Abstract: Based on the first-order perturbation theory of soliton, the Gordon-Haus timing jitter induced by amplifier noise is found to be non-Gaussian distributed. Compared with Gaussian distribution given by the linearized perturbation theory, both frequency and timing jitter have larger tail probability. The timing jitter has a larger discrepancy to Gaussian distribution than that of frequency jitter.
On-Chip Detection of Entangled Photons by Scalable Integration of Single-Photon Detectors  [PDF]
Faraz Najafi,Jacob Mower,Nicholas Harris,Francesco Bellei,Andrew Dane,Catherine Lee,Prashanta Kharel,Francesco Marsili,Solomon Assefa,Karl K. Berggren,Dirk Englund
Physics , 2014, DOI: 10.1038/ncomms6873
Abstract: Photonic integrated circuits (PICs) have emerged as a scalable platform for complex quantum technologies using photonic and atomic systems. A central goal has been to integrate photon-resolving detectors to reduce optical losses, latency, and wiring complexity associated with off-chip detectors. Superconducting nanowire single-photon detectors (SNSPDs) are particularly attractive because of high detection efficiency, sub-50-ps timing jitter, nanosecond-scale reset time, and sensitivity from the visible to the mid-infrared spectrum. However, while single SNSPDs have been incorporated into individual waveguides, the system efficiency of multiple SNSPDs in one photonic circuit has been limited below 0.2% due to low device yield. Here we introduce a micrometer-scale flip-chip process that enables scalable integration of SNSPDs on a range of PICs. Ten low-jitter detectors were integrated on one PIC with 100% device yield. With an average system efficiency beyond 10% for multiple SNSPDs on one PIC, we demonstrate high-fidelity on-chip photon correlation measurements of non-classical light.
Timing jitter in passively mode-locked semiconductor lasers  [PDF]
A. Pimenov,T. Habruseva,D. Rachinskii,S. P. Hegarty,G. Huyet,A. G. Vladimirov
Mathematics , 2014,
Abstract: We study the effect of noise on the dynamics of passively mode-locked semiconductor lasers both experimentally and theoretically. A method combining analytical and numerical approaches for estimation of pulse timing jitter is proposed. We investigate how the presence of dynamical features such as wavelength bistability affects timing jitter.
Small noise asymptotic of the timing jitter in soliton transmission  [PDF]
Arnaud Debussche,Eric Gautier
Mathematics , 2006, DOI: 10.1214/07-AAP449
Abstract: We consider the problem of the error in soliton transmission in long-haul optical fibers caused by the spontaneous emission of noise inherent to amplification. We study two types of noises driving the stochastic focusing cubic one dimensional nonlinear Schr\"{o}dinger equation which appears in physics in that context. We focus on the fluctuations of the mass and arrival time or timing jitter. We give the small noise asymptotic of the tails of these two quantities for the two types of noises. We are then able to prove several results from physics among which the Gordon--Haus effect which states that the fluctuation of the arrival time is a much more limiting factor than the fluctuation of the mass. The physical results had been obtained with arguments difficult to fully justify mathematically.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.