Novel Transponder Interfaces: Novel Modulation Formats

For a long period of time, the modulation format in optical communications technology was based on intensity modulation with an on/off - keying signalling, using NRZ and sometimes RZ pulse-shapes. However with today's requirements for very high capacity networks with constraints on cost efficiency, more advanced solutions are required. Advanced modulation formats are considered as one of the key issue in the networks of the future. With novel modulation formats we have the general options to modulate the amplitude or the phase or both of the optical carrier signal of a coherent laser. An additional degree of flexibility can be achieved by using polarization (division) multiplexing (PDM). The table gives an overview of the currently discussed options.

[1]  A. S. Acampora,et al.  A packet compression/decompression approach for very high speed optical networks , 1990, SBT/IEEE International Symposium on Telecommunications.

[2]  Kemal Bengi,et al.  A novel scalable optical packet compression/decompression scheme , 2001, Proceedings 27th European Conference on Optical Communication (Cat. No.01TH8551).

[3]  W. Rosenkranz,et al.  42.8 Gbit/s, 4 Bits per Symbol 16-ary Inverse-RZ-QASK-DQPSK Transmission Experiment without Polmux , 2007, OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference.

[4]  S. Aleksic.  Design Considerations for a High-Speed Metro Network Using All-Optical Packet Processing , 2006, 2006 International Conference on Transparent Optical Networks.

[5]  Slavisa Aleksic.  Packed-Switched OTDM Networks Employing the Packet Compression/Expansion Technique , 2004, Photonic Network Communications.

[6]  W. Rosenkranz,et al.  32.1 Gbit/s InverseRZ-ASK-DQPSK Modulation with Low Implementation Penalty , 2006, LEOS 2006 - 19th Annual Meeting of the IEEE Lasers and Electro-Optics Society.

[7]  Dispersion Tolerance of 40 Gbaud Multilevel Modulation Formats with up to 3 bits per Symbol , 2006, LEOS 2006 - 19th Annual Meeting of the IEEE Lasers and Electro-Optics Society.

[8]  K.L. Hall,et al.  Optical rate conversion for high-speed TDM networks , 1997, IEEE Photonics Technology Letters.

[9]  W. Rosenkranz,et al.  Statistical analysis of electrical equalization of differential mode delay in MMF links for 10-Gigabit Ethernet , 2005, OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005..

[10]  Torger Tokle,et al.  Penalty-free transmission of multilevel 240 Gbit/s RZ-DQPSK-ASK using only 40 Gbit/s equipment , 2005 .

[11]  I. Glesk,et al.  Simultaneous optical compression and decompression of 100-Gb/s OTDM packets using a single bidirectional optical delay line lattice , 1999, IEEE Photonics Technology Letters.

[12]  W. Rosenkranz,et al.  Investigation of Multilevel Phase and Amplitude Modulation Formats in Combination With Polarization Multiplexing up to 240 Gb/s , 2006, IEEE Photonics Technology Letters.