Effects of chirp and noises on autocorrelation characteristics of hyperbolic secant pulse

2008 ◽  
Author(s):  
Hongjun Zheng ◽  
Shanliang Liu ◽  
Xin Li
Keyword(s):  
Hyperbolic Secant Pulse

Performance Analysis of Coherent Optical Communication System for M-QAM Higher Modulation Level

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Amrinder Kaur ◽  
Sanjeev Dewra
Keyword(s):  
Optical Communication ◽  
Communication System ◽  
Pulse Generator ◽  
Q Factor ◽  
Optical Communication System ◽  
Coherent Optical Communication ◽  
Eye Opening ◽  
Hyperbolic Secant Pulse ◽  
Sequence Generator ◽  
Modulation Level

AbstractIn this paper, performance of QAM sequence generator in coherent optical communication system is investigated. Results are obtained for different square constellation types such as 4-QAM, 16-QAM, 64-QAM and 256-QAM using Hyperbolic-secant pulse generator. For the distance of 120 km and bit rate of 10 Gbps, it is investigated that 4-QAM provides maximum Q factor of 33.93 and minimum BER of 6e-253, whereas 16-QAM, 64-QAM & 256-QAM provides Q factor of 31.47, 22.85 & 8 and BER of 5e-218, 3e-116 & 2e-16, respectively. Decrement in Quality factor and increase in BER are observed with increment in the M-value of QAM. It is further observed that Eye opening decreases with increment in levels of QAM.

Measurements. Pulse Dispersion Measurements on Concatenated Cabled Optical Fibers at 1.3 μm

1984 ◽  
Vol 5 (1) ◽  
Author(s):  
L. Bjerkan
Keyword(s):  
Frequency Domain ◽  
Optical Fibers ◽  
Time Domain ◽  
Frequency Characteristic ◽  
Pulse Width ◽  
Frequency Domain Analysis ◽  
Frequency Characteristics ◽  
The Other ◽  
Irregular Frequency ◽  
Hyperbolic Secant Pulse

SummaryTime domain measurements of the bandwidth of concatenated cabled optical fibers at 1.3 μm has been carried out on two different cable constructions. Both time domain and frequency domain analysis are presented.For one cable type containing fibers exhibiting smooth frequency characteristics a concatenation exponent γ = 0.66 was found for a 9.5 km length of concatenated fibers. For the other cable type containing some fibers with irregular frequency characteristics such a fit was not possible for a 24 km length of concatenated fibers but an exponent γ = 0.65 could be fit to the last 14 km. Two splicing procedures were employed on the latter cable type, but no appreciable difference in the results was observed. When the frequency characteristic was regular the 3 dB optical bandwidth of the spliced fiber sections was found to be inversely proportional to therms pulse width broadening.The bandwidth-pulsewidth product agreed with results obtained for Gaussian pulse shapes for one cable type and hyperbolic secant pulse shapes for the other cable type.

scholarly journals The effect of magnetic field on the tunneling yield of ammonia molecules

2021 ◽  
pp. 5-14
Author(s):  
Violeta Petrović ◽  
Hristina Delibašić ◽  
Ivan Petrović
Keyword(s):  
Magnetic Field ◽  
Laser Field ◽  
Magnetic Component ◽  
Relativistic Field ◽  
Hyperbolic Secant Pulse

We analyzed the influence of magnetic component of the laser field on the tunneling yield, in a strong near-relativistic field for a squared hyperbolic secant pulse distribution. The obtained results indicate that the inclusion of the magnetic component is necessary in the observed regime.

An analysis of the effects of short T2 values on the hyperbolic-secant pulse

1991 ◽  
Vol 92 (1) ◽  
pp. 94-101 ◽  
Author(s):  
David G Norris ◽  
Heiko Lüdemann ◽  
Dieter Leibfritz
Keyword(s):  
Short T2 ◽  
Hyperbolic Secant Pulse
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