Electric field intensity detecting device having a condenser-type antenna and a light modulator
First Claim
1. An apparatus for measuring an electric field intensity comprising:
- light generating means for generating coherent measuring light;
a sensor disposed in the electric field for modulating a measuring light according to the intensity of the electric field and for outputting said modulated light;
an up-link optical fiber connecting between said light generating means and said sensor for guiding said measuring light into said sensor;
a down-link optical fiber for guiding said modulated light outside said sensor; and
intensity processing means disposed outside said sensor for processing said intensity of the electric field based on the degree of modulation of said measuring light inputted via said down-link optical fiber;
whereinsaid sensor comprises a condenser-type antenna for detecting the electric field and outputting a voltage according to the intensity of the detected electric field, a waveguide-type optical integrated circuit in which a waveguide for propagating the inputted measuring light is formed, a light modulator, through which said waveguide extends, formed in said optical integrated circuit, and a light modulator electrode for applying the output voltage of said condenser-type antenna to said waveguide of said light modulator, whereby the measuring light is modulated according to the intensity of the electric field while the measuring light is propagated through said waveguide of said light modulator.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus measures the intensity of an electric field with a compact sensor equipped with a light modulater of a Mach-zender interferometer type and a condenser-type antenna. The sensor modulates coherent measuring lights propagated through branched two optical paths according to the voltage induced on the surfaces of plates of a condenser-type antenna of the sensor. The modulated lights are merged and interfered with each other and result in merged light different in intensity from the original measuring light. A waveguide-type optical integrated circuit formed in the sensor calculates the intensity of the merged light having the intensity dependent on the intensity of the magnetic field.
25 Citations
12 Claims
-
1. An apparatus for measuring an electric field intensity comprising:
-
light generating means for generating coherent measuring light; a sensor disposed in the electric field for modulating a measuring light according to the intensity of the electric field and for outputting said modulated light; an up-link optical fiber connecting between said light generating means and said sensor for guiding said measuring light into said sensor; a down-link optical fiber for guiding said modulated light outside said sensor; and intensity processing means disposed outside said sensor for processing said intensity of the electric field based on the degree of modulation of said measuring light inputted via said down-link optical fiber;
whereinsaid sensor comprises a condenser-type antenna for detecting the electric field and outputting a voltage according to the intensity of the detected electric field, a waveguide-type optical integrated circuit in which a waveguide for propagating the inputted measuring light is formed, a light modulator, through which said waveguide extends, formed in said optical integrated circuit, and a light modulator electrode for applying the output voltage of said condenser-type antenna to said waveguide of said light modulator, whereby the measuring light is modulated according to the intensity of the electric field while the measuring light is propagated through said waveguide of said light modulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification