Influence of Gain Dispersion on the Propagation Characteristics of Ultrashort Optical Pulses in Distributed Fiber Amplifiers

2011 ◽  
Vol 84-85 ◽  
pp. 607-612 ◽  
Author(s):  
Xiao Hong Zhou ◽  
Ze Yong Wang ◽  
Li Wang ◽  
Xiao Rong Gao ◽  
Bin Luo
Keyword(s):  
Optical Pulse ◽  
Group Velocity Dispersion ◽  
Fiber Amplifier ◽  
Propagation Characteristics ◽  
Ultrashort Optical Pulse ◽  
Pulse Profile ◽  
Loss Mechanism ◽  
Ultrashort Optical Pulses ◽  
Gain Narrowing ◽  
Gain Dispersion

The physical model for the optical pulse propagating in the amplifier has been established. Within the normal dispersion region of the fiber, the evolution of the optical pulse in the amplifier has been simulated numerically, and the influence of gain dispersion on the propagation characteristics of the pulse has been discussed emphatically. The results show that, during the propagation of the ultrashort optical pulse in a distributed fiber amplifier, group velocity dispersion and Kerr nonlinear effect will affect the pulse profile and spectrum. For the ultrashort optical pulse with a wideband spectrum, the influence of gain spectrum on the propagation characteristics of the optical pulse, in essence, is that of gain dispersion, which is equivalent to a loss mechanism and will generate gain narrowing effect, so it should be considered in the design of an amplifier system.

Generation of an ultrashort optical pulse by four-wave Raman mixing in deuterium cooled at 77 K

2004 ◽  
Vol 78 (6) ◽  
pp. 745-751 ◽  
Author(s):  
H. Otsuka ◽  
S. Zaitsu ◽  
T. Uchimura ◽  
T. Imasaka
Keyword(s):  
Optical Pulse ◽  
Ultrashort Optical Pulse

scholarly journals Enhanced Spectral Amplitude Coding OCDMA System Utilizing a Single Photodiode Detection

2018 ◽  
Vol 8 (10) ◽  
pp. 1861 ◽  
Author(s):  
Somia Abd El-Mottaleb ◽  
Heba Fayed ◽  
Ahmed Abd El-Aziz ◽  
Mohamed Metawee ◽  
Moustafa Aly
Keyword(s):  
System Performance ◽  
Multiple Access ◽  
Group Velocity Dispersion ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Spectral Amplitude ◽  
Erbium Doped Fiber Amplifier ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple

In this paper, the performance of a spectral amplitude coding-optical code division multiple access (SAC-OCDMA) system is investigated utilizing a single photodiode (SPD) detection technique. The proposed system uses enhanced double weight (EDW) codes as signature codes with three simultaneous users to overcome both phase-induced intensity noise (PIIN) and multiple access interference (MAI). In addition, a dispersion compensating fiber (DCF) is used in order to decrease the group velocity dispersion (GVD) caused in the single mode fiber. An erbium-doped fiber amplifier (EDFA) is used to overcome the attenuation. The use of both DCF and EDFA leads to an appreciable enhancement in the system performance. The system performance is evaluated through its bit error rate (BER), Q-factor, and received power. A comparison between the EDW codes and modified double weight (MDW) codes on the SAC-OCDMA system is demonstrated. Simulation is carried out through Optisystem ver. 7. The simulation results show that: (a) using an avalanche photodiode (APD) over PIN photodiode allows data transmission over longer distances; (b) the use of DCF improves the system BER;(c) using MDW codes gives better BER than using EDW codes.

scholarly journals Amplification of Frequency-Modulated Similariton Pulses in Length-Inhomogeneous Active Fibers

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
I. O. Zolotovskii ◽  
D. I. Sementsov ◽  
A. A. Sysolyatin ◽  
A. S. Belanov ◽  
M. S. Yavtushenko
Keyword(s):  
Group Velocity ◽  
Optical Fibers ◽  
Optical Pulse ◽  
Velocity Dispersion ◽  
Group Velocity Dispersion ◽  
Normal Group ◽  
The Self ◽  
Similar Frequency ◽  
Pulse Amplification ◽  
Self Similar

The possibility of an effective gain of the self-similar frequency-modulated (FM) wave packets is studied in the length-inhomogeneous active fibers. The dynamics of parabolic pulses with the constant chirp has been considered. The optimal profile for the change of the group-velocity dispersion corresponding to the optimal similariton pulse amplification has been obtained. It is shown that the use of FM pulses in the active (gain) and length-inhomogeneous optical fibers with the normal group-velocity dispersion can provide subpicosecond optical pulse amplification up to the energies higher than 1 nJ.

scholarly journals Analysis of shot noise in the detection of ultrashort optical pulse trains

2013 ◽  
Vol 30 (6) ◽  
pp. 1775 ◽  
Author(s):  
Franklyn Quinlan ◽  
Tara M. Fortier ◽  
Haifeng Jiang ◽  
Scott A. Diddams
Keyword(s):  
Shot Noise ◽  
Optical Pulse ◽  
Ultrashort Optical Pulse ◽  
Pulse Trains

An intensity/phase autocorrelator for the use of ultrashort optical pulse measurements

1981 ◽  
Vol 40 (2) ◽  
pp. 156-160 ◽  
Author(s):  
Toshio Kurobori ◽  
Yoshio Cho ◽  
Yukito Matsuo
Keyword(s):  
Optical Pulse ◽  
Ultrashort Optical Pulse ◽  
Pulse Measurements
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