Temperature Sensor with Pulsed Raman Amplification
Raman amplification and pulsed lasing in cladding pumped germanosilicate fiber
... Fig. 4. Simulation result of pump, 1 st and 2 nd Raman power evolution along the fiber (a); 90 mW pump power, (b);140 mW pump power Results: Figure 2 shows the DCRF gain vs. pump power for 1420 and 940 m long ...
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Distributed Brillouin Fiber Sensor Assisted by First-Order Raman Amplification
... In this experiment the Brillouin pump and probe waves are obtained from the same laser diode (LD). This way the pump- probe frequency difference remains constant and controlled, re- gardless of the absolute frequency ...
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Chirped pulse Raman amplification in plasma
... initial temperature of the plasma of 5 eV due to the creation of the plasma channel [27], a theoretical absorption of ∼ 5% of the seed energy is expected due to IB heating ...a temperature of approximately ...
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Raman amplification in plasma : thermal effects
... At finite temperature, contributions from the electron pressure lead to an increase in the resonant frequency of the plasma. This Bohm-Gross shift will alter the resonance conditions of the Raman process. ...
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Research on Noise Reduction Approach of Raman Based Distributed Temperature Sensor Based on Nonlinear Filter
... on temperature measurement accuracy in RDTS, we propose a noise reduction method based on nonlinear filtering of median filter to improve the accuracy of temperature measurement of ...of temperature ...
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Chirped pulse Raman amplification in plasma: high gain measurements
... gain, amplification can be diminished by several concurrent phenomena such as spontaneous Raman backscattering leading to early pump depletion, Raman forward scattering, temperature increase ...
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Chirped pulse Raman amplification in warm plasma : towards controlling saturation
... stimulated Raman backscattering (SRBS) in plasma 4 as an alternative amplification method 5 suitable for high field intensities, where energy is directly transferred from a pump beam to a short seed ...SRBS ...
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Plasma density measurements using chirped pulse broad-band Raman amplification
... g(x) is calculated as presented earlier and typical spec- tra and gain curve are shown in Figure 3. Clear Stokes and anti-Stokes satellites are visible in agreement with the ana- lytical and simulation results. Values of ...
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Brillouin optical time-domain analysis assisted by second-order Raman amplification
... of temperature and/or strain in optical fibers ...for amplification is reduced ...and Raman) and also significant pump depletion start to take ...distributed amplification along the fiber to ...
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High Precision Bidirectional Heat Pulsed Flow Sensor
... peak temperature difference between the upstream and downstream sens- ing element at different air flow ...the temperature difference decreases as a function of flow ...heater temperature gives a ...
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Quasi-lossless data transmission with ultra-long Raman fibre laser based amplification
... (PRBS) data pattern by the lithium niobate MZM. To generate RZ signal, mod- ulated data is fed into second MZM driven by frequency that is half of the data rate. To compensate for the transmitter loss, modulated signal ...
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Raman Fiber Laser–Based Amplification in Telecommunications
... of Raman fiber laser (RFL)-based amplifica- tion techniques and their applications in long-haul/unrepeatered coherent transmission ...RFL-based amplification techniques are investigated from signal/noise ...
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Raman Scattering in High Temperature Superconductors
... of Raman Scattering in high temperature Superconductors (HTS) via using the quantum dynamical approach of double time temperature dependent phonon-Green’s ...order Raman scattering, ...
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Infrared and raman spectroscopy studies on pulsed PECVD a Si:H Films
... by pulsed plasma enhanced chemical vapour deposition (PECVD) technique using Raman and infrared ...The Raman spectra of the films have been used to obtain evidence of nanocrystallinity in the ...
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Temperature Dependent Raman Scattering of ZnSe Nanowires
... (TEM). Raman spectroscopy of the ZnSe nanowires samples under different temperature varying between 80 K and 580 K were carried out using Renishaw in Via- Reflex micro-Raman spectroscopy system with ...
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The closure temperature(s) of zircon Raman dating
... for 20 s each in step-and-glue mode. In step-and-glue mode, several spectra are recorded at different detector positions to cover a larger range of wavenumbers at high pixel resolution. We measured three steps spanning ...
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Temperature micro-Raman study of lysozyme crystals
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An ultra-high gain and efficient amplifier based on Raman amplification in plasma
... on Raman amplification in plasma ...1 Raman amplification arising from the excitation of a density echelon in plasma could lead to amplifiers that significantly exceed current power limits of ...
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Scaling of Raman amplification in realistic slow light photonic crystal waveguides
... We then proceed by analyzing the influence of the mode- profile variation with slowdown factor on the signal gain, an effect that has already been proven to be important for the accurate determination of linear losses 9 ...
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Pulsed electromagnet EMAT for high temperature applications
... by temperature changes, thus it is important to measure the ability of the ceramic insulation to resist cracking when it is exposed to changes of ...target temperature is reached, or by changing the ...
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