Optical maser device of the internal modulation type for pulse signal transmission

Claim 1

AN OPTICAL MASER DEVICE OF THE INTERNAL MODULATION TYPE FOR PULSE SIGNAL TRANSMISSION COMPRISING: AN OPTICAL BEAM PRODUCING ELEMENT INCLUDING AN ACTIVE SUBSTANCE HAVING OPTICAL MASTER ACTION; A PAIR OF MIRRORS DISPOSED TO SUBSTANTIALLY RECIPROCATE THE OPTICAL BEAM GENERATED BY SAID ELEMENT THEREBETWEEN; A CRYSTAL MEMBER OF LARGE ELECTRO-OPTICAL EFFECT, HAVING TWO END SURFACES FORMED PERPENDICULARLY TO ONE OF THE OPTICAL AXES, DISPOSED BETWEEN SAID MIRRORS TO PROPAGATE SAID OPTICAL BEAM ALONG THE AXIS; MEANS FOR APPLYING A TIMING SIGNAL VOLTAGE ACROSS SAID CRYSTAL MEMBER PIECE FOR MODULATING SAID OPTICAL BEAM, SAID TIMING SIGNAL VOLTAGE HAVING A FREQUENCY DETERMINED BY THE LIGHT VELOCITY AND THE OPTICAL PATH BETWEEN SAID MIRRORS; MEANS FOR APPLYING A PULSE SIGNAL ACROSS SAID CRYSTAL MEMBER FOR MODULATING SAID OPTICAL BEAM, SAID PULSE SIGNAL REPRESENTING THE INFORMATION TO BE TRANSMITTED AND BEING IN SUBSTANTIAL SYNCHRONISM WITH SAID TIMING SIGNAL; AND A BIREFRINGENCE PRISM, WHICH HAS AT LEAST ONE SIDE SURFACE SATISFYING THE BREWSTER''S REFLECTIONLESS CONDITION, COUPLED TO SAID OPTICAL BEAM AND INTERPOSED BETWEEN SAID ELEMENT AND SAID CRYSTAL MEMBER IN SUCH MANNER THAT THE PLANE OF POLARIZATION OF SAID OPTICAL BEAM AND THE PRISM''S OPTICAL AXIS MAY BE IN ONE OF A PREPENDICULAR AND A PARALLEL RELATIONSHIP.