3 X 3 WAVEGUIDE COUPLER FOR BIDIRECTIONAL DUAL WAVELENGTH TRANSMISSION AND SIGNAL SAMPLING AND METHOD FOR MAKING THE SAME

摘要

The invention provides an optic coupler for a fiber optic system, having a single coupler, a first optical port, a second optical port, a system port and a detector port. The first optical port responds to and provides a first forward optical signal. The second optical port responds to and provides a second forward optical signal. The single coupler responds to the first forward optical signal and the second forward optical signal, for providing a coupled first and second forward optical signal. The single coupler also responds to a combined first and second reverse optical signal, for providing a coupled first and second reverse optical signal. The system port responds to and provides the coupled first and second forward optical signal to the fiber optic system. The system port also responds to and provides the combined first and second reverse optical signal to the single coupler. The detector port responds to and provides the coupled first and second reverse optical signal to a detector.