Patent ID: 7035545
Filing Date: 2006-04-25
Classification: H04B,H04J

Abstract:
1. An optical circuit, comprising: an input for inputting a first input signal at a first wavelength and a second input signal at a second wavelength; an output for outputting an output signal; a first circulator including an input port coupled to the input, an output port coupled to the output, and an intermediate port coupled to a first end of a first selective reflection circuit, the first selective reflection circuit configured to reflect the first input signal and transmit the second input signal; and a second circulator including a first port coupled to a second end of the first selective reflection circuit, a second port coupled to a demultiplexer, and a third port coupled to a multiplexer, wherein the demultiplexer is configured to separate the second input signal into an optical path having an optical switch, the optical switch having a bar made transmission state that allows the optical switch to transmit the second input signal to the multiplexer and a cross mode transmission state that allows the optical switch to transmit the second input signal to an external output and an additional signal to the multiplexer.