Optical packet labeling based on simultaneous polarization shift keying and amplitude shift keying

Area of Science:

• Optical communications
• Photonics
• Signal processing

Background:

• Optical packet switching requires efficient label manipulation.
• Orthogonal labeling schemes offer increased data capacity.
• Existing methods for label swapping can be complex and lossy.

Purpose of the Study:

• To propose and demonstrate a novel label encoding-swapping and transmission technique for orthogonally labeled optical packets.
• To develop a simple and effective demodulation and demultiplexing scheme for the polarization shift keying (PolSK) label.
• To ensure precise control and maintenance of the PolSK label's extinction ratio at intermediate nodes.

Main Methods:

• Utilizing a 10-Gbit/s amplitude shift keying (ASK) payload and a 2.5-Gbit/s polarization shift keying (PolSK) label.
• Implementing a demodulation and demultiplexing scheme based on an injection-locked Fabry-Perot laser diode.
• Controlling and maintaining the extinction ratio of the added PolSK label.

Main Results:

• Successful demonstration of label encoding-swapping and transmission for orthogonally labeled packets.
• A simple and effective scheme for PolSK label demodulation and demultiplexing was achieved.
• Precise control and maintenance of the PolSK label's extinction ratio were verified after the intermediate node.

Conclusions:

• The proposed method enables efficient label manipulation in optical networks.
• The injection-locked Fabry-Perot laser diode scheme provides a practical solution for PolSK label processing.
• This technique supports robust optical packet switching with high label integrity.