Abstract
Optical label switching is a technique for more effective use of the processing speed of
electronic IP routers. In this technique IP packets are accompanied by small optical
labels, which the node uses for routing and forwarding decisions. In each node only the
label is recovered, processed electronically and a new label is reinserted, while the
payload remains in the optical domain. One method for labelling IP packets is
orthogonal FSK/IM modulation, where the payload is ‘Intensity Modulated’ (IM) and the
label is ‘Frequency Modulated’ (FSK).
Transmission through optical filters, i.e. multiplexers and passive AWG routers can
cause signal degradation. When a combined FSK/IM signal is not well filtered, the two
FSK tones will induce intensity fluctuations, which can result in FSK to IM conversion.
In this paper, we show simulation and experimental results of how the combined
FSK/IM scheme performs with respect to signal degradation due to laser nominal
wavelength detuning and optical filter misalignments. Further we show analytical
results on the relation between required optical filter bandwidth and frequency deviation.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of NOC |
| Place of Publication | London, UK |
| Publication date | 2005 |
| Publication status | Published - 2005 |
| Externally published | Yes |
| Event | 10th European Conference on Networks & Optical Communications - London, United Kingdom Duration: 5 Jul 2005 → 7 Jul 2005 Conference number: 10 |
Conference
| Conference | 10th European Conference on Networks & Optical Communications |
|---|---|
| Number | 10 |
| Country/Territory | United Kingdom |
| City | London |
| Period | 05/07/2005 → 07/07/2005 |