Optical Isolator, Shutter, Variable Optical Attenuator and Modulator Device

An optical device comprising:

• a first and a second polarizer each having a polarization plane, the polarization plane of said second polarizer being oriented at a 45 degree angle to the plane of said first polarizer, wherein the first polarizer receives the input light beam and the second polarizer provides output light beam;
• a Pockels cell for rotating an input beam based on an external voltage;
• a Faraday rotator disposed between said first polarizer and said Pockels cell, said Pockels cell being disposed between said Faraday rotator and said second polarizer to receive a light beam from the rotator, the Pockels cell having two birefringent axes aligned at 45 degrees symmetrically to the polarization plane of the said second polarizer;
• at least one electric driver for said attenuator and said shutter;
• and
• an electric driver for said modulator.