Integrated optical high voltage sensor

Details Integrated optical high voltage sensor Integrated optical high voltage sensor

1986-10-22

1988-07-19

Mullins, James B.

350 9612, 350 9614, G02B 612

Patent

active

047580607

ABSTRACT:
A high voltage sensor using an integrated optical Mach-Zehnder device is disclosed. A capacitive divider for sensing the electric field is connected to an electrode adjacent one of the parallel waveguide sections, while a second electrode adjacent the other section is grounded. The capacitive divider may be fabricated on the same substrate as the Mach-Zehnder device. Two similar devices which can be immersed in the electric field are also disclosed. In one case the device uses a Mach-Zehnder device having waveguides of the slab type. In this variation materials having two different refractive indices, both of which are low relative to the high index slab form the superstrates of the parallel waveguide sections. In the second variation, a Mach-Zehnder device having waveguides of the diffusion type is used. Thin films of high refractive index material are deposited over the two parallel waveguide sections, with the thickness and/or refractive index of the two film sections being different.

REFERENCES:
patent: 4300814 (1981-11-01), Carenco
patent: 4447116 (1984-05-01), King et al.
Bassen et al, "An RF Field Strength Measurement System Using an Integrated Optical Linear Modulator", IEEE MTT-S International Microwave-Symposium Digest, Washington, D.C., May 28-30, 1980, pp. 317, 318.
Kawaguchi et al, "PLZT Thin-Film Waveguides", Applied Optics, vol. 23, No. 13, Jul. 1, 1984, 2187-2191.
Mikami et al, "Modified Balanced-Bridge Switch with Two Straight Waveguides", Appl. Phys. Lett. 35(2), Jul. 15, 1979, pp. 145-147.
"Integrated Optical Temperature Sensor", L. M. Johnson et al., Appl. Phys. Lett. 41(2), Jul. 15, 1982, pp. 134-136.

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