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

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4 Author(s)
Hyuek Jae Lee ; Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA ; Yoo, S.J.B. ; Tsui, V.K. ; Fong, S.K.H.

This letter proposes and demonstrates a simple all-optical label detection and swapping technique incorporating a fiber Bragg grating (FBG) filter and a double sideband subcarrier multiplexed (DSB-SCM) signal. The optical datagram consisting of a baseband 2.488-Gb/s data payload and a subcarrier multiplexed 622-Mb/s label are optically processed to separate the two components, and then a new label content is encoded by subsequent optical modulation. The optically separated original label is detected by a square law detector without involving any high-frequency subcarrier circuitry. Bit-error-rate measurements confirm a successful and low-penalty label swapping technique, which maintains optical transparency for the data payload.

Published in:

Photonics Technology Letters, IEEE  (Volume:13 ,  Issue: 6 )