SFP OTDR Wavelength Isolation for Continuous Fiber Monitoring

The patent uses different wavelength parameters for OTDR signal and data signal transmission. The OTDR signal is transmitted at a first wavelength while data signals are transmitted at a second wavelength, allowing both signals to coexist in the same optical fiber without interference. This wavelength division approach enables continuous fiber monitoring while maintaining uninterrupted data transmission.

The patent employs wavelength division multiplexing where the OTDR signal and data signal are separated by wavelength rather than by physical isolation components. By transmitting the OTDR signal at a different wavelength from the data signal, the system achieves effective signal isolation without requiring large directional couplers or filters, thus maintaining a compact device footprint.

The patent enables continuous operation of both data transmission and OTDR monitoring simultaneously by using different wavelengths for each function. The optical fiber communication continues uninterrupted while the OTDR continuously monitors for anomalies, eliminating the need to suspend data transmission during testing and thus maintaining both productivity and measurement capability.

The patent uses wavelength division multiplexing to achieve signal isolation through parameter differentiation rather than through large physical isolation components. By assigning different wavelengths to OTDR and data signals, the system maintains effective signal separation even in the compact SFP form factor, eliminating the need for bulky directional couplers and filters that would be required in traditional isolation approaches.