Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1982-04-05
1985-03-26
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 57R, 356218, G01R 2900, G01J 142
Patent
active
045076065
ABSTRACT:
Device for measuring variations of the gain of a laser amplifier at a particular wavelength, as a function of a pumping energy, said device comprising a source supplying continuous light radiation having the said wavelength and a power Pe, said radiation traversing the amplifier with a given radius, a means for tapping part of the amplified radiation at the output of the amplifier, a photoreceiver receiving said part and measuring the power Ps thereof throughout the pumping time, a means for forming the quotient of Ps by Pe and supplying a signal G(t) representing the variations of the gain as a function of the pumping time, wherein the device also comprises means for supplying a signal E(t) representing the increase in the pumping energy used during pumping and means for extracting a signal G(E) representing the gain variations as a function of the pumping energy for the given radius from the two signals G(t) and E(t), by elimination of the time t.
It also relates to a process which utilizes this device.
REFERENCES:
patent: 3687558 (1972-08-01), Rex
Gill et al; "Measurements of Gain . . . "; Optics Communications; vol. 22; No. 3; Sep. 1977; p. 288.
I.E.E.E. Journal of Quantum Electronics; vol. QE-15; No. 6; Jun. 1979.
Sadighi-Bonabi, R. et al; J. Appl. Phys.; 53(5); May 1982; pp. 3418-3423.
Fujiwara, E. et al; Japanese J. of Appl. Phys.; vol. 20; No. 1; Jan. 1981; pp. L71-L74.
Bedu Marcel
Rousseau Thierry
Commissariat a l'Energie Atomigue
Karlsen Ernest F.
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