Analysis of Four Wave Mixing In Ultra Dense WDM-Hybrid Optical Amplifier Systems

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Navjot Singh ◽  
Mahendra Kumar ◽  
Ashu Verma
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Speed ◽  
High Capacity ◽  
Optical Amplifier ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Gain Bandwidth ◽  
Wavelength Division ◽  
Dense Wdm ◽  
And Performance

AbstractAmplification through hybrid optical amplifiers (HOAs) is a propitious and proficient technology for high speed and high capacity dense wavelength-division-multiplexing (DWDM) systems. HOAs are intended to improve system reach and to accomplish wide gain bandwidth with enhanced flatness of gain. In this work, an ultradense 16 channel WDM system is demonstrated and performance of diverse hybrid amplifiers is evaluated in terms of output power, Q-factor, gain flatness and BER. Spacing among the WDM channels is 25 GHz in order to make system bandwidth efficient and scrutinized its effect on four wave mixing (FWM) in case of EDFA-EDFA, Raman-EDFA and SOA-EDFA. It is observed that SOA-EDFA is more and Raman-EDFA is less prone to FWM. Moreover, for distance 20 Km–140 Km, Raman-EDFA is optimal configuration for amplification and from 150 Km–200  Km, SOA-EDFA shows better performance. For prolonged link lengths such as beyond 200  Km, EDFA-EDFA is a right hybrid amplifier. In order to achieve maximum gain flatness in proposed architecture, EDFA-EDFA is recommended to use.

scholarly journals Wavelength Tuning Free Transceiver Module in OLT Downstream Multicasting4λ × 10 Gb/s TWDM-PON System

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
M. S. Salleh ◽  
A. S. M. Supa’at ◽  
S. M. Idrus ◽  
S. Yaakob ◽  
Z. M. Yusof
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bandwidth Allocation ◽  
High Speed ◽  
Optical Network ◽  
Optical Amplifier ◽  
Wavelength Tuning ◽  
Passive Optical Network ◽  
Wavelength Division ◽  
Link Loss ◽  
Dynamic Time

We propose a new architecture of dynamic time-wavelength division multiplexing-passive optical network (TWDM-PON) system that employs integrated all-optical packet routing (AOPR) module using4λ×10 Gbps downstream signal to support 20 km fiber transmission. This module has been designed to support high speed L2 aggregation and routing in the physical layer PON system by using multicasting cross-gain modulation (XGM) to route packet from any PON port to multiple PON links. Meanwhile, the fixed wavelength optical line terminal (OLT) transmitter with wavelength tuning free features has been designed to integrate with the semiconductor optical amplifier (SOA) and passive arrayed waveguide grating (AWG). By implementing hybrid multicasting and multiplexing, the system has been able to support a PON system with full flexibility function for managing highly efficient dynamic bandwidth allocation to support the4λ×10 Gb/s TWDM-PON system used to connect 4 different PON links using fixed wavelength OLT transceivers with maximum 38 dB link loss.

COMPARISON OF INTERCHANNEL FOUR-WAVE MIXING WITH CONTINUOUS WAVES, QUASI-CONTINUOUS WAVES AND ULTRASHORT PULSES

2003 ◽  
Vol 12 (03) ◽  
pp. 377-384 ◽  
Author(s):  
SHIMING GAO ◽  
CHANGXI YANG ◽  
GUOFAN JIN
Keyword(s):  
Conversion Efficiency ◽  
Wavelength Division Multiplexing ◽  
Pulse Width ◽  
Continuous Wave ◽  
Ultrashort Pulses ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Propagation Length ◽  
Wavelength Division ◽  
Continuous Waves

We compare the interchannel four-wave mixing (FWM) in dense wavelength division multiplexing (DWDM) systems with continuous waves, quasi-continuous waves and ultrashort pulses. The differences are theoretically analyzed for the three inputs. We investigate the FWM conversion efficiency as a function of the channel spacing, the fiber length, the single bit energy and the pulse width. It is shown that the FWM effect in DWDM systems with quasi-continuous waves is the strongest and with ultrashort pulses is the lowest among the three cases. The FWM conversion efficiency changes periodically with the propagation length, and it is approximately an exponential function of the single bit energy. The performance of the pulse FWM effect versus the pulse width is different from that of the quasi-continuous wave FWM, which may be one possible way to suppress the interchannel FWM.

scholarly journals Modified Unequally Spaced Channels Wavelength Division Multiplexing System

2008 ◽  
pp. 68-78
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bit Error Rate ◽  
Error Rate ◽  
Four Wave Mixing ◽  
The Other ◽  
Wave Mixing ◽  
Wavelength Division ◽  
Unequally Spaced ◽  
Frequency Spacing ◽  
Active Channels

The channels contributed in creating new pulse during the four-wave mixing (FWM) process are a subject of two features: the first is the fact that all channels are not working with probability %100 , but with p probability. Second, the bits transmitted are not all "1". Therefore, the equation of power generated using these features should be corrected. On the other hand, the use of equally spaced channels wavelength divisionmultiplexing (ESC WDM) system cause an increase in the number of new components generated that interfere with the active channels and increase the bit error rate. In order to reduce these interferences, we have provided an unequally spaced channels wavelength division-multiplexing (USC WDM) system composed of several sets. Each set consists of only four channels, which locations have been selected to cause no interferences between them. Neighboring sets are separated by a frequency spacing which should be large enough to reduce the interferences between the sets, andsmall enough to increase the total number of channels of the system.

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