A simple all-optical label detection and swapping technique incorporating a fiber Bragg grating filter

This letter proposes and demonstrates a simple all-optical label detection and swapping technique incorporating a fiber Bragg grating (FBG) tilter and a double sideband subcarrier multiplexed (DSB-SCM) signal. The optical dat agram consisting of a baseband 2.488-Gb/s data payload and a subcarrier mul tiplexed 622-Mb/s label are optically processed to separate the two compone nts, and then a new label content is encoded by subsequent optical modulati on, The optically separated original label is detected by a square Law dete ctor without involving any high-frequency subcarrier circuitry, Bit-error-r ate measurements confirm a successful and low-penalty label swapping techni que, which maintains optical transparency for the data payload.