Abstract: A method for securing communication over an optical fiber, comprising: supplying an optically modulated version of a desired sequence of information that is intended to be transferred over a multicore optical fiber to a first core of the multicore optical fiber; and supplying an unmodulated optical chaff signal to a second core of the multicore optical fiber that is spatially distinct from the first core; wherein the fiber is adapted to transport the optical chaff signal from a first end thereof to a second end thereof unmodified in the second core; and wherein the fiber is adapted to transport the optically modulated version of a desired sequence of information from the first end of the fiber to the second end of the fiber unmodified in the first core and independent of the chaff signal in the second core unless there is a tap of the fiber.

Abstract: A fiber link system and method for masking signals on a fiber link system. The system includes sending a desired sequence of information in the form of a true optical signal that is typically intended to be transferred between legitimate users at both ends of a link over a center core of a the spatially multiplexing optical fiber that is a multicore fiber. Optical chaff signals, or subterfuge signals, are sent alongside the true signal in at least one, non-center core of the spatially multiplexing optical fiber to mask such true signal in the fiber cable from intruders tapping into the fiber cable. At least one of the chaff signals occupies substantially a same optical frequency range as the true signal. The optical signals may be coupled into the multiplexing optical fiber using a transmit spatial multiplexer.

Abstract: A fiber link system, method and device for masking signals on a fiber link system. The system includes sending a desired sequence of information in the form of a true signal that is typically intended to be transferred between legitimate users at both ends of a link. Sending chaff signals, or subterfuge signals, alongside the true signal to mask such legitimate signals in the fiber cable from intruders tapping into the fiber cable.

Abstract: A method for securing communication over an optical fiber, comprising: supplying an optically modulated version of a desired sequence of information that is intended to be transferred over a multicore optical fiber to a first core of the multicore optical fiber; and supplying an unmodulated optical chaff signal to a second core of the multicore optical fiber that is spatially distinct from the first core; wherein the fiber is adapted to transport the optical chaff signal from a first end thereof to a second end thereof unmodified in the second core; and wherein the fiber is adapted to transport the optically modulated version of a desired sequence of information from the first end of the fiber to the second end of the fiber unmodified in the first core and independent of the chaff signal in the second core unless there is a tap of the fiber.

Abstract: A system and method for securing communication over an optical fiber are disclosed. The system includes a transmit spatial multiplexer configured to couple a plurality of optical signals into respective ones of a plurality of spatial paths of an optical fiber, each of the spatial paths being able to carry an optical signal; wherein at least one of the plurality of optical signals is an optically modulated version of a desired sequence of information that is intended to be transferred over the optical fiber; and wherein at least one of the plurality of optical signals is an optical chaff signal; whereby a tap along the fiber cannot determine the transmitted desired sequence of information.

Abstract: A system and method for securing communication over an optical fiber are disclosed. The system includes a transmit spatial multiplexer configured to couple a plurality of optical signals into respective ones of a plurality of spatial paths of an optical fiber, each of the spatial paths being able to carry an optical signal; wherein at least one of the plurality of optical signals is an optically modulated version of a desired sequence of information that is intended to be transferred over the optical fiber; and wherein at least one of the plurality of optical signals is an optical chaff signal; whereby a tap along the fiber cannot determine the transmitted desired sequence of information.

Abstract: A system and method for securing communication over an optical fiber are disclosed. The system includes a transmit spatial multiplexer configured to couple optical signals into spatial paths of an optical fiber, a first of the plurality of optical signals is an optically modulated version of a desired sequence of information that is intended to be transferred over the optical fiber and it is coupled into a first of the spatial paths; a second one of the plurality of optical signals is an optical chaff signal and it is coupled into a second spatial path different from the first one, and a third optical signal is an optical signal for use by an optical time domain reflectometer (OTDR) that is coupled into one of the spatial paths of the optical fiber, whereby a tap along the fiber cannot determine the transmitted desired sequence of information.

Abstract: A system and method for securing communication over an optical fiber are disclosed. The system includes a transmit spatial multiplexer configured to couple a plurality of optical signals into respective ones of a plurality of spatial paths of an optical fiber, each of the spatial paths being able to carry an optical signal; wherein at least one of the plurality of optical signals is an optically modulated version of a desired sequence of information that is intended to be transferred over the optical fiber; and wherein at least one of the plurality of optical signals is an optical chaff signal; whereby a tap along the fiber cannot determine the transmitted desired sequence of information.

Abstract: A fiber link system, method and device for masking signals on a fiber link system. The system includes sending a desired sequence of information in the form of a true signal that is typically intended to be transferred between legitimate users at both ends of a link. Sending chaff signals, or subterfuge signals, alongside the true signal to mask such legitimate signals in the fiber cable from intruders tapping into the fiber cable.

Abstract: A fiber link system, method and device for masking signals on a fiber link system. The system includes sending a desired sequence of information in the form of a true signal that is typically intended to be transferred between legitimate users at both ends of a link. Sending chaff signals, or subterfuge signals, alongside the true signal to mask such legitimate signals in the fiber cable from intruders tapping into the fiber cable.

Abstract: A system and method for securing communication over an optical fiber are disclosed. The system includes a transmit spatial multiplexer configured to couple optical signals into spatial paths of an optical fiber, a first of the plurality of optical signals is an optically modulated version of a desired sequence of information that is intended to be transferred over the optical fiber and it is coupled into a first of the spatial paths; a second one of the plurality of optical signals is an optical chaff signal and it is coupled into a second spatial path different from the first one, and a third optical signal is an optical signal for use by an optical time domain reflectometer (OTDR) that is coupled into one of the spatial paths of the optical fiber, whereby a tap along the fiber cannot determine the transmitted desired sequence of information.

Abstract: A system and method for securing communication over an optical fiber are disclosed. The system includes a transmit spatial multiplexer configured to couple a plurality of optical signals into respective ones of a plurality of spatial paths of an optical fiber, each of the spatial paths being able to carry an optical signal; wherein at least one of the plurality of optical signals is an optically modulated version of a desired sequence of information that is intended to be transferred over the optical fiber; and wherein at least one of the plurality of optical signals is an optical chaff signal; whereby a tap along the fiber cannot determine the transmitted desired sequence of information.

Abstract: A fiber link system, method and device for masking signals on a fiber link system. The system includes sending a desired sequence of information in the form of a true signal that is typically intended to be transferred between legitimate users at both ends of a link. Sending chaff signals, or subterfuge signals, alongside the true signal to mask such legitimate signals in the fiber cable from intruders tapping into the fiber cable.