Fiber Optic Sensor Of Magnetic Field

Principal scheme of fiber optic magnetometer.
Sensitivity of about 10^-6 Oe×Hz^-1/2  was achieved. 
Linear dynamic range is 10⁵

Fiber Optic Electrometer with Mechanical Resonator

The principal scheme of fiber optic electrometer.
The sensitivity achieved equals to 2×10^-4 V Hz^-1/2, resistance > 10¹²W, capacity < 1 pF

Fiber Optic Sensor of Electrostatic Field with Mechanical Resonator

New type of fiber optic sensor of electrostatic field is considered. Using the interferometric detection technique the resolution of about 0.2 (V/m)Hz^-1/2 was achieved. Theoretical evaluation yields the thermal fluctuation limit of about 2.5 10^-4(V/m)Hz^-1/2.

The scheme of fiber optic electric field sensor.  
1-resonator, 2-cubic capacitor, 3-test plate, 4-CW laser diode,
5-optical fiber, 6-directional coupler, 7-photodiode, 8-lock-in amplifier