scholarly journals Optimization of Multiple Active Ion Doped Fiber Amplifiers for Three Communication Windows

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
Chun Jiang ◽  
Li Jin
Keyword(s):  
Theoretical Model ◽  
Pump Power ◽  
Fiber Length ◽  
Fiber Amplifier ◽  
Fiber Amplifiers ◽  
Co Doping ◽  
Active Fiber ◽  
First Time ◽  
Co Doped

We present for the first time a theoretical model ofEr3+-Tm3+-Pr3+codoped fiber pumped with both 800 nm and 980 nm lasers to explore possibility of this co-doped system as all-wave fiber amplifier. The rate and power propagation equations of the model are solved numerically and the dependence of the gains at 1310, 1470, 1530, 1600, 1650 nm windows on fiber length is calculated. The results show that with pump power of 200 mW/200 mW, when the concentrations ofPr3+,Tm3+,Er3+are around1.7×1024,3.9×1024,1.2×1024(ions/m3), respectively, the signals at 1310, 1470, 1530, 1600, 1650 nm may be nearly equally amplified with gain of 13–16.0 dB in the active fiber with length of 23.5 m; the co-doping concentrations and fiber length and pump powers may be further optimized to reduce the ripple.

scholarly journals Numerical Simulation of 980 nm-LD-Pumped Yb3+-Er3+-Tm3+-Codoped Fiber Amplifier for 1500 nm and 1600 nm Bands

2009 ◽  
Vol 2009 ◽  
pp. 1-8
Author(s):  
Chun Jiang
Keyword(s):  
Numerical Simulation ◽  
Theoretical Model ◽  
Pump Power ◽  
Fiber Length ◽  
Fiber Amplifier ◽  
Numerical Results ◽  
Experimental Result ◽  
Signal Wavelength ◽  
Gain Spectra ◽  
Good Agreement

The theoretical model of Yb3+-Er3+-Tm3+-codoped fiber amplifier pumped by 980 nm laser is proposed, and the rate and power propagation equations are numerically solved to analyze the dependences of the gains at 1500 nm and 1600 nm bands on the activator concentrations, fiber length, pump power, and signal wavelength. The numerical results show that our model is in good agreement with experimental result, and with pump power of 200 mW and fiber length varying from 0.15 to 1.5 m, the gains at the two bands may reach 10.0–20.0 dB when the codoping concentrations of Yb3+, Er3+, and Tm3+ are in the ranges 1.0–3.0×1025, 1.0–3.0×1024, and 1.0–3.0×1024 ions/m3, respectively. The fiber parameters may be optimized to flatten the gain spectra.

Hexavalent chromium removal over magnetic carbon nanoadsorbents: synergistic effect of fluorine and nitrogen co-doping

2018 ◽  
Vol 6 (27) ◽  
pp. 13062-13074 ◽  
Author(s):  
Jiangnan Huang ◽  
Yuhang Li ◽  
Yonghai Cao ◽  
Feng Peng ◽  
Yonggang Cao ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Hexavalent Chromium ◽  
Environmental Remediation ◽  
High Efficiency ◽  
Chromium Removal ◽  
Co Doping ◽  
Magnetic Carbon ◽  
First Time ◽  
Co Doped

F and N co-doped magnetic nanocarbons as adsorbents for environmental remediation have been demonstrated for the first time with high efficiency.

37.2dB small-signal gain from Er/Yb Co-doped fiber amplifier with 20mW pump power

2008 ◽  
Vol 40 (1) ◽  
pp. 88-91 ◽  
Author(s):  
S.W. Harun ◽  
H.A. Abdul-Rashid ◽  
S.Z. Muhd-Yassin ◽  
M.K. Abd-Rahman ◽  
K.K. Jayapalan ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Amplifier ◽  
Small Signal Gain ◽  
Small Signal ◽  
Signal Gain ◽  
Co Doped

scholarly journals OPTIMIZATION OF THE 1050nm PUMP POWER AND FIBER LENGTH IN SINGLE-PASS AND DOUBLE-PASS THULIUM DOPED FIBER AMPLIFIERS

2009 ◽  
Vol 14 ◽  
pp. 431-448 ◽  
Author(s):  
Siamak Dawazdah Emami ◽  
Sulaiman Wadi Harun ◽  
Faidz Abd-Rahman ◽  
Hairul Azhar Abdul-Rashid ◽  
Siti Aida Daud ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Length ◽  
Fiber Amplifiers ◽  
Double Pass ◽  
Single Pass

Up-Conversion Luminescence Properties of Ho3+ Doped and Yb3+/Ho3+ Co-Doped Y2WO6 Phosphors

2017 ◽  
Vol 727 ◽  
pp. 618-622 ◽  
Author(s):  
Xue Dong Gao ◽  
Deng Hui Xu ◽  
Yao Hui Zhu ◽  
Zai Fa Yang ◽  
Jiang Nan Du ◽  
...  
Keyword(s):  
High Temperature ◽  
Pump Power ◽  
Energy Level ◽  
Visible Region ◽  
X Ray Diffraction ◽  
X Ray ◽  
Co Doping ◽  
Two Photon ◽  
Photon Process ◽  
Co Doped

In this article, Ho3+ doped and Yb3+/ Ho3+ co-doped Y2WO6 phosphors were successfully prepared via high temperature solid method. Their structures were investigated with X-ray diffraction, the up-conversion (UC) excitation from a 980 nm diode laser, and the developed phosphor shown two UC emission bands in the visible region 540 and 643 nm. Based on the result, the intensity of the frequency up-conversion emission was enhanced significantly through co-doping with Yb3+ ions in the Y2WO6: Ho3+ phosphor. The dependence of emission intensity on the pump power indicated that the up-conversion emission was a two-photon process. At last, the energy level diagrams was discussed. The results show that Y2WO6 is a promising host material for UC phosphors.

scholarly journals Investigations of the optical and electronic effects of silicon and indium co-doping on ZnO thin films deposited by spray pyrolysis

2020 ◽  
Vol 75 (1-2) ◽  
pp. 23-32 ◽  
Author(s):  
Yiwen Fang ◽  
Jonathan R. Dilworth ◽  
Michael Pepper ◽  
Peter P. Edwards
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Indium Content ◽  
Zno Thin Films ◽  
Silicon Doping ◽  
Electronic Effects ◽  
Significant Saving ◽  
Co Doping ◽  
First Time ◽  
Co Doped

AbstractSilicon and indium co-doped ZnO thin films with both high optical and electrical performances have been successfully synthesised for the first time by the technique of spray pyrolysis. We find that this co-doping strategy can achieve comparable Figures-of-Merit performances to indium zinc oxide itself, but with, importantly, a significant saving in the indium content. The properties of the co-doped films are compared with those of either single indium or silicon doping.

scholarly journals GAIN AND NOISE IN ERBIUM-DOPED FIBER AMPLIFIER (EDFA) - A RATE EQUATION APPROACH (REA)

2007 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
PHUNG QUOC BAO ◽  
LE HONG SON
Keyword(s):  
Pump Power ◽  
Rate Equation ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Fiber Amplifiers ◽  
Signal Power ◽  
Equation Approach ◽  
Erbium Doped Fiber Amplifier ◽  
Erbium Doped ◽  
Rate Equation Approach

We present a rate equation approach (REA) based on the propagation equations in single-mode Erbium-Doped Fiber Amplifiers (EDFAs). Special attention is paid to the gain and the amplified spontaneous emission (ASE) noise as functions of position including the effects of some main parameters such as pump power, signal power.

scholarly journals Optical Fiber Amplifiers: Optimization and PerformanceEvaluation

2019 ◽  
Vol 12 (1) ◽  
pp. 66-72
Author(s):  
A. K. Abass
Keyword(s):  
Pump Power ◽  
Optical Fiber ◽  
Noise Figure ◽  
Fiber Amplifier ◽  
Fiber Amplifiers ◽  
Erbium Doped Fiber Amplifier ◽  
Gain Variation ◽  
Erbium Doped ◽  
Raman Fiber Amplifier ◽  
Optical Fiber Amplifiers

This work demonstrates the simulation of two different types of optical fiber amplifiers (OFA) utilizing OptiSystem–10, namely, 3 m length of erbium doped fiber amplifier (EDFA) and 7 km length of Raman fiber amplifier (RFA). The counter-pumped architecture is adopted for both proposed optical amplifiers. The optimum pump power (OPP) for each amplifier determines in which the longest 3–dB flat gain bandwidth (3–dB BW), reasonable average gain level (Gav), proper average noise figure (NFav) and lower gain variation (Gvar) were achieved. The EDFA shows best performance at conventional band (C–band) within the pump power of 30 mW.While the better performance is observed at long band (L–band) within the pump power of 600 mW for the RFA.

High thermochromic performance of Fe/Mg co-doped VO2 thin films for smart window applications

2018 ◽  
Vol 6 (24) ◽  
pp. 6502-6509 ◽  
Author(s):  
Chunhui Ji ◽  
Zhiming Wu ◽  
Lulu Lu ◽  
Xuefei Wu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
New Method ◽  
Smart Window ◽  
Smart Windows ◽  
Practical Applications ◽  
Co Doping ◽  
Window Applications ◽  
Vo2 Thin Films ◽  
First Time ◽  
Co Doped

A new method, Fe/Mg co-doping, is proposed for the first time to optimize thermochromic VO2 and the promising performance of VO2-based smart windows for practical applications is successfully achieved.

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