Patent ID: 6212313
Filing Date: 2001-04-03
Classification: G02B

Abstract:
An optical interleaver comprising:a) at least three input/output ports configured to transmit optical signals;b) a first birefringent element optically coupled to the at least three input/output ports;c) a first polarization rotator element optically coupled to the first birefringent element;d) a wavelength filter optically coupled to the first polarization rotator element;e) a second birefringent element optically coupled to the wavelength filter;f) a second polarization rotator element optically coupled to the second birefringent element; andg) a reflector optically coupled to the second polarization rotator element, wherein the reflector is configured to reflect an optical signal that travels from at least one of the at least three input/output ports through elements b)-f) back through elements b)-f) in reverse order to at least one of the at least three input/output ports.