Changes

A typical EO probe is composed of an optical fiber affixed with an EO crystal, whose bottom surface is coated with a dielectric reflective layer. A low-noise 1550nm laser is used as the optical beam source. The beam is delivered to the optical probe through a fiber-based optical mainframe. The polarization of the beam is modulated by the electric field penetrating the EO crystal tip. The modulated beam is reflected back into the fiber, and back to the mainframe for analysis. The intensity of the output optical beam is linearly proportional to the strength of the external electric field at the probe tip location. This is then converted A to an RF output signal by a high-speed photodetector then .