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All-optical ASK/DPSK label-swapping and buffering using Fabry-Perot laser diodes

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3 Author(s)
Chow, C.W. ; Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, China ; Wong, C.S. ; Tsang, H.K.

We describe an approach for optical label encoding that allows the realization of all-optical label-swapping in optical packet-switched networks. The proposed method is based on a combination of the amplitude-shift-keying (ASK) modulated payload with the differential phase-shift keying (DPSK) modulated label on the same optical carrier. We demonstrate an implementation using dual-wavelength injection locking (DWIL) of a Fabry-Perot laser diode. Bit-error-rate measurements were performed for the 10-Gb/s payload, and the 2.5-Gb/s label showed the feasibility of the proposed method. An all-optical buffer for the two-level ASK/DPSK optically labeled packets is also described. The buffer is implemented by routing the packet via a delay line if potential contention is predicted. Error-free operation was also achieved.

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:10 ,  Issue: 2 )