Numerical and experimental investigation of a multiband PIFA for laptops

✍ Scribed by P. Nepa; G. Manara; A. A. Serra; M. Ragazzo; S. Marsico

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 535 KB
• Volume: 46
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.21015

✦ Synopsis

was DPSK encoded with a NRZ 2 31 Ϫ 1 pseudo-random binary sequence (PRBS) sequence at 10 Gb/s. The average output power after the packet generation was measured to be Ϫ11.83 dBm. The extinction ratio (ER) of the label and the optical carrier was 14.08 dB for the short payload, and 12.25 dB for the long payload.

The signal was amplified and then filtered using an optical band pass filter (BPF) with 0.5-nm bandwidth, thus obtaining a measured average power of 0 dBm after the filtering. A polarization controller was used to adjust the polarization of the 45°input signal with respect to the SOA layers. The SOA was driven at 200 mA and the output signal was filtered using an optical BPF with 0.3-nm bandwidth. The recovered label and the pulses were obtained after filtering out the signal through a polarization-beam splitter (PBS). Figures 2(a) and 2(c) show the original packet with short and long payloads, respectively. Figures 2(b) and 2(d) show the recovered label and the pulses used to set and reset the flip-flop for the short and long packets, respectively. The suppression ratios from the label to the payload are 20.00 and 26.01 dB for the short and long cases, respectively.

CONCLUSION

We have experimentally demonstrated a novel label-extraction technique for all-optical time serial labeling based on self-polarization rotation in an SOA. Moreover, the proposed scheme also generates the synchronization pulses required in an all-optical core-node architecture in order to set and reset the optical flip-flop that controls the wavelength converter. The packet scheme allows asynchronous and variable payload-length operation. The results show a suppression ratio from the label to the payload higher than 20 dB.