Polarization dependent loss (PDL) compensation systems
AssigneeRaytheon Applied Signal Technology, Inc.
InventorsVincent Wolff, Kevin Lundgreen
Life of this patent
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Abstract
A polarization dependent loss (PDL) compensation device for an optical system can be configured to output a compensating PDL to at least partially cancel a PDL of the optical system. In certain embodiments, the device can include a first polarization controller configured to modify a state of polarization of an optical signal, a PDL emulator disposed upstream of the first polarization controller and configured to output the compensating PDL upstream of the first polarization controller, and a second polarization controller disposed upstream of the PDL emulator and configured to modify a state of polarization of the optical signal upstream of the PDL emulator.
Claims18
A polarization dependent loss (PDL) compensation device for an optical system, wherein the PDL compensation device is configured to output a compensating PDL to at least partially cancel a PDL of the optical system wherein the device comprises:
- a first polarization controller configured to modify a state of polarization of an optical signal;
- a PDL emulator disposed upstream of the first polarization controller and configured to output the compensating PDL upstream of the first polarization controller;
- and
- a second polarization controller disposed upstream of the PDL emulator and configured to modify a state of polarization of the optical signal upstream of the PDL emulator.
An interferometer system, comprising:
- a pass-through leg configured to transmit a first optical signal;
- an amplified leg coupled to the pass-through leg to receive the first optical signal at a first end, and coupled to the pass-through leg at a second end to output a second optical signal to the pass-through leg to interfere with the first optical signal;
- a polarization dependent loss (PDL) compensation device disposed on the amplified leg, wherein the PDL compensation device is configured to output a compensating PDL to at least partially cancel a PDL of the interferometer system,
- wherein the PDL compensation device comprises:
- a first polarization controller configured to modify a state of polarization of an optical signal;
- a PDL emulator disposed upstream of the first polarization controller and configured to output the compensating PDL upstream of the first polarization controller;
- and
- a second polarization controller disposed upstream of the PDL emulator and configured to modify a state of polarization of the optical signal upstream of the PDL emulator.
A non-transitory computer readable medium comprising computer readable instructions that when executed by a computer causes the computer to perform a method, the method comprising:
- controlling a PDL compensation device to output a compensating polarization dependent loss (PDL) to at least partially cancel a PDL of an optical system,
- wherein the PDL compensation device comprises:
- a first polarization controller configured to modify a state of polarization of an optical signal;
- a PDL emulator disposed upstream of the first polarization controller and configured to output the compensating PDL upstream of the first polarization controller;
- and
- a second polarization controller disposed upstream of the PDL emulator and configured to modify a state of polarization of the optical signal upstream of the PDL emulator.
Dependencies are inferred from the claim text.