Frequency modulated laser diode
OwnerPaolo G. Cielo, Garfield W. McMahoninventors
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Abstract
A method of modulating the output of a solid state diode laser by directly straining the laser chip. The chip is mechanically coupled to a transducer such as a piezoelectric crystal in such a manner that a dimensional variation in the transducer is translated into a corresponding variation in the chip. It is contemplated that the modulated output will have application in communication systems and in particular a hydrophone system.
Claims5
A hydrophone system comprising a diode laser source, a length of optical fiber adapted to transmit the output of the diode laser, a Fabry-Perot optical cavity sensing acoustic pressure fluctuations, a second optical fiber transmitting light from the sensor to a detector and a data-processing circuit that generates a signal representing said acoustical pressure fluctuations, wherein the output of the diode laser source is modulated by a dimensionally variable transducer mechanically coupled thereto, in response to an input from said data processing circuit.
Dependencies are inferred from the claim text.