Gain stability in a distributed Raman amplifier for a wavelength-division multiplexing system

2010 ◽  
Vol 49 (4) ◽  
pp. 045003 ◽  
Author(s):  
Jeng-Cherng Dung
Keyword(s):  
Wavelength Division Multiplexing ◽  
Wavelength Division ◽  
Raman Amplifier

scholarly journals Intensity and Wavelength Division Multiplexing FBG Sensor System Using a Raman Amplifier and Extreme Learning Machine

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Yibeltal Chanie Manie ◽  
Run-Kai Shiu ◽  
Peng-Chun Peng ◽  
Bao-Yi Guo ◽  
Mekuanint Agegnehu Bitew ◽  
...  
Keyword(s):  
Extreme Learning Machine ◽  
Wavelength Division Multiplexing ◽  
Sensor System ◽  
Bragg Wavelength ◽  
Wavelength Division ◽  
Raman Amplifier ◽  
Fbg Sensor ◽  
Transmission Distance ◽  
Fbg Sensors ◽  
Learning Machine

A fiber Bragg grating (FBG) sensor is a favorable sensor in measuring strain, pressure, vibration, and temperature in different applications, such as in smart structures, wind turbines, aerospace, industry, military, medical centers, and civil engineering. FBG sensors have the following advantages: immune to electromagnetic interference, light weight, small size, flexible, stretchable, highly accurate, longer stability, and capable in measuring ultra-high-speed events. In this paper, we propose and demonstrate an intensity and wavelength division multiplexing (IWDM) FBG sensor system using a Raman amplifier and extreme learning machine (ELM). We use an IWDM technique to increase the number of FBG sensors. As the number of FBG sensors increases and the spectra of two or more FBGs are overlapped, a conventional peak detection (CPD) method is unappropriate to detect the central Bragg wavelength of each FBG sensor. To solve this problem, we use ELM techniques. An ELM is used to accurately detect the central Bragg wavelength of each FBG sensor even when the spectra of FBGs are partially or fully overlapped. Moreover, a Raman amplifier is added to a fiber span to generate a gain medium within the transmission fiber, which amplifies the signal and compensates for the signal losses. The transmission distance and the sensing signal quality increase when the Raman pump power increases. The experimental results revealed that a Raman amplifier compensates for the signal losses and provides a stable sensing output even beyond a 45 km transmission distance. We achieve a remote sensing of strain measurement using a 45 km single-mode fiber (SMF). Furthermore, the well-trained ELM wavelength detection methods accurately detect the central Bragg wavelengths of FBG sensors when the two FBG spectra are fully overlapped.

scholarly journals Design of a Hybrid Optical amplifier for 64 DWDM Channels network by using EDFA and Raman Amplifier

2017 ◽  
Vol 5 (4) ◽  
pp. 18-23
Author(s):  
Bandana Mallick ◽  
Bibhu Prasad ◽  
Dr. Krishna Chandra Patra
Keyword(s):  
Wavelength Division Multiplexing ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Input Power ◽  
Fiber Amplifiers ◽  
Wavelength Division ◽  
Raman Amplifier ◽  
Optical Fiber Amplifier ◽  
Erbium Doped ◽  
Different Types

In this paper a hybrid amplifier EDFA-RAMAN DWDM transmission system is proposed and demonstrated. A new hybrid two-stage optical fiber amplifier for dense wavelength division multiplexing (DWDM) network is observed. The hybrid amplifier is cascaded erbium- doped fiber amplifiers (EDFA) & Raman amplifier which provide a nearly flat gain over 80 nm. The hybrid amplifier has been modeled using an Optic-System version 14 on a DWDM transmission. In this paper we compare Q-factor at different input power i.e. at 0db and at 10 db. Here two different types of apodized function (Uniform & Gaussian) are selected as fiber Bragg grating parameters and system performance is analyzed. Performance of the system is analyzed by using BER analyzer.

Performance Analysis of FBG WDM System using Different Optical Amplifiers

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Suraj Jain ◽  
Chakresh Kumar
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Amplifiers ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Q Factor ◽  
Erbium Doped Fiber Amplifier ◽  
Wavelength Division ◽  
Raman Amplifier ◽  
Erbium Doped ◽  
Channel Wavelength

AbstractThis paper aims to analyze the performance of FBG 60 channel wavelength-division multiplexing system using different optical amplifiers namely RAMAN, erbium-doped fiber amplifier (EDFA) and semiconductor optical amplifier (SOA) separately at 10 Gbps data rate up to a fiber length of 280 km. Based upon the results, the performance of the three amplifiers has been compared on the basis of multiple performance parameters. It is seen that EDFA simulates good results in terms of bit error rate (BER) up to a fiber distance of approximately 80 km and Q factor up to a distance of approximately 90 km among all the three amplifiers. However, power received is least in EDFA. RAMAN amplifier provides a better Q factor after the fiber distance of approximately 90 km and a better BER after the fiber distance of approximately 80 km compared to the other three amplifiers. SOA shows better results in terms of power received up to a fiber distance of approximately 100 km. RAMAN amplifier provides better output power after a distance of 100 km. Eye diagrams and power spectrums of the network with different optical amplifiers has also been analyzed.

Flatness Improvement of FRA with Multi-Wavelength Pump

2014 ◽  
Vol 981 ◽  
pp. 141-145
Author(s):  
Yu Ma ◽  
Yan Chao Li ◽  
Chang Xing Liu ◽  
Xiang Yu Meng ◽  
Jiu Ru Yang
Keyword(s):  
Wavelength Division Multiplexing ◽  
Low Noise ◽  
Gain Spectrum ◽  
Silica Fiber ◽  
Dense Wavelength Division Multiplexing ◽  
Wavelength Division ◽  
Raman Amplifier ◽  
Fiber Raman Amplifier ◽  
Pump Source ◽  
Multi Wavelength

A fiber Raman amplifier (FRA) based on the properties of silica fiber can not only get a wideband gain spectrum by using multiple pumps, but also has the nature of low noise and cost. In the study of FRA, gain-flatness is one of the most key and hot issues. In this paper, we focus on the gain flatness of fiber Raman amplifier by multi-pump, and various parameters in term if power and number of pump source are analyzed comprehensively. According to the numerical results obtained, the optimized within power and number of the pump source are determined. And we controlled the gain-flatness of FRA within ±1 dB from 1512nm to 1566nm in a dense wavelength division multiplexing system with 67 channels.

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