System and method for monitoring a fiber and a detector attached to the fiber

A system for detecting an intrusion of at least one of a monitoring fiber and a detector comprising:

• a closure monitor,
• a first signal generator;
• an intrusion monitor;
• the monitoring fiber having a first end and a second end;
• at least one detector attached to the monitoring fiber;
• wherein the at least one detector reflects a first signal light, and
• a data device,
• a second signal generator;
• a multiplexer;
• at least one active fiber actively carrying data;
• and
• a demultiplexer,
• wherein
• the first signal generator generates and transmits the first signal light having a first wavelength,
• the monitoring fiber
• receives the transmitted first signal light via the first end of the monitoring fiber and carries the reflected portion of the first signal light from the at least one detector to the closure monitor, and
• carries a non-reflected portion of the first signal light via the second end of the monitoring fiber,
• the second signal generator of the data device generates and transmits a second signal light having a second wavelength,
• the multiplexer multiplexes the non-reflected portion of the first signal light and the second signal light,
• the active fiber
• receives the transmitted multiplexed signal light via the first end of the active fiber, and
• carries the multiplexed signal light to the second end of the active fiber to the demultiplexer, and
• wherein
• the demultiplexer separates the non-reflected portion of the first signal light having a first wavelength and the second signal light having a second wavelength, and
• the intrusion monitor
• receives the non-reflected portion of the first signal light from the demultiplexer, and
• monitors the non-reflected portion of the first signal light to detect transient changes in the non-reflected portion of the first light indicative of at least one of a vibration, a motion and a handling of at least one of the monitoring fiber and the at least one detector.