Multifunctional integrated optical device

An integrated multifunctional optical device, comprising:

• a) an input port collimator with a pigtailed single mode optical fiber and an output port collimator with a pigtailed single mode optical fiber, the input port collimator receiving input lights, the output port collimator providing output lights;
• b) a first birefrigent crystal wedge and a second birefrigent crystal wedge;
• the first birefrigent crystal wedge receiving the input lights from the input port collimator and splitting into two linearly polarized lights with ordinary lights in a vertical direction and extraordinary lights in a horizontal direction, the second birefrigent crystal wedge with optical axes aligned at 45 degree angle relative to the ordinary lights, and at −45 degree angle relative to the extraordinary lights;
• c) a Pockels cell rotating a polarization plane of the input lights by an external electric voltage, two optical axes of the Pockels cell being aligned with two optical axes of the first birefrigent crystal wedge;
• d) a Faraday rotator disposed between the first birefrigent crystal wedge and the Pockels cell, receiving lights from the first birefrigent crystal wedge;
• the Pockels cell disposed between the Faraday rotator and the second birefrigent crystal wedge, receiving the lights from the Faraday rotator, the second birefrigent crystal wage disposed between the Pockels cell and the output port collimator, receiving two linearly polarized lights from the Pockels cell, combining the linearly polarized lights into one light and outputting to the output collimator;
• e) at least one electric driver for a variable optical attenuator and an optical switch;
• and
• f) an electric driver for an optical modulator.