Gain spectrum self controlling device and algorithm for mutiply pumped Raman amplifiers

2004 ◽  
Author(s):  
Jia Ying Wang
Keyword(s):  
Gain Spectrum ◽  
Raman Amplifiers

THEORETICAL ANALYSIS OF GAIN SATURATION CHARACTERISTICS OF WIDE-BAND FIBER RAMAN AMPLIFIERS

2010 ◽  
Vol 24 (12) ◽  
pp. 1199-1205
Author(s):  
QUN HAN ◽  
JIPING NING ◽  
ZHAOXIA SHENG
Keyword(s):  
Theoretical Analysis ◽  
Raman Scattering ◽  
Numerical Solution ◽  
Stimulated Raman Scattering ◽  
Wide Band ◽  
Gain Spectrum ◽  
Signal Power ◽  
Gain Saturation ◽  
Saturated Gain ◽  
Raman Amplifiers

The gain saturation characteristics of wide-band fiber Raman amplifiers (FRAs) are analyzed by numerical solution of the FRA equations. The results show that the stimulated Raman scattering induced gain-tilt in saturated FRAs is not only related to the signal power, but also depends on the pumping geometry of the amplifier. The saturated gain spectrum tilts towards the longer wavelength for counter-pumped FRAs while it tilts towards the shorter wavelength for co-pumped ones. These results indicate that gain-flatness-preserving FRAs with the changing of the signal power can be designed.

256 QAM Digital Coherent Optical Transmission Using Raman Amplifiers

2011 ◽  
Vol E94-B (2) ◽  
pp. 417-424 ◽  
Author(s):  
Masato YOSHIDA ◽  
Seiji OKAMOTO ◽  
Tatsunori OMIYA ◽  
Keisuke KASAI ◽  
Masataka NAKAZAWA
Keyword(s):  
Optical Transmission ◽  
Raman Amplifiers

Observation of inhomogeneity in the gain spectrum of a coumarin laser dye

1973 ◽  
Vol 7 (4) ◽  
pp. 309-312 ◽  
Author(s):  
R.L. Kohn ◽  
C.V. Shank ◽  
A. Dienes
Keyword(s):  
Gain Spectrum ◽  
Laser Dye

Optimal design of flat-gain wide-band fiber Raman amplifiers

2002 ◽  
Vol 20 (2) ◽  
pp. 250-254 ◽  
Author(s):  
V.E. Perlin ◽  
H.G. Winful
Keyword(s):  
Optimal Design ◽  
Wide Band ◽  
Raman Amplifiers ◽  
Flat Gain

scholarly journals Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1166
Author(s):  
Bin Liu ◽  
Jianping He ◽  
Shihai Zhang ◽  
Yinping Zhang ◽  
Jianan Yu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Frequency Shift ◽  
Optical Fiber Sensor ◽  
Gain Spectrum ◽  
Fiber Sensor ◽  
Peak Fitting ◽  
Fitting Algorithm ◽  
Distributed Optical Fiber Sensor ◽  
Brillouin Gain ◽  
Distributed Optical Fiber

Brillouin frequency shift (BFS) of distributed optical fiber sensor is extracted from the Brillouin gain spectrum (BGS), which is often characterized by Lorenz type. However, in the case of complex stress and optical fiber self damage, the BGS will deviate from Lorenz type and be asymmetric, which leads to the extraction error of BFS. In order to enhance the extraction accuracy of BFS, the Lorenz local single peak fitting algorithm was developed to fit the Brillouin gain spectrum curve, which can make the BSG symmetrical with respect to the Brillouin center frequency shift. One temperature test of a fiber-reinforced polymer (FRP) packaged sensor whose BSG curve is asymmetric was conducted to verify the idea. The results show that the local region curve of BSG processed by the developed algorithm has good symmetry, and the temperature measurement accuracy obtained by the developed algorithm is higher than that directly measured by demodulation equipment. Comparison with the reference temperature, the relative measurement error measured by the developed algorithm and BOTDA are within 4% and 8%, respectively.

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