Current supply for radiation sources of frequency-proportional o

Details Current supply for radiation sources of frequency-proportional o Current supply for radiation sources of frequency-proportional o

1986-03-05

1987-11-17

Laroche, Eugene R.

Coherent light generators

Particular component circuitry

Optical pumping

372 29, 372 30, 372 31, 372 25, 372 26, 250205, 332 751, H01S 300, H01S 313, G01J 132

Patent

active

047078383

ABSTRACT:
A current supply is disclosed for frequency-proportional optical sensors, preferably fiber-optical sensors, having a constant amplitude modulated over time. The delay time of the modulation is kept constant as well in the current supply in order to increase the accuracy of measurement. A variable resistor that is connected in series with the LED or the semiconductor laser is used for this purpose. This resistor may for example be a photoresistor illuminated by a light source and the resistance value of this resistor is varied by an open-loop or closed-loop control circuit. The variable resistor may also be a resistor that is heated by its own current.

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IEEE Standard Dictionary of Electrical and Electronic Terms, p. 791, Third Edition.

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