Continuous phase modulation parameter optimization for DWDM systems

Thomas Detwiler; Alexander Blanquet; Andrew Stark; Bert Basch; Stephen E. Ralph

doi:10.1117/12.909592

24 January 2012 Continuous phase modulation parameter optimization for DWDM systems

Thomas Detwiler, Alexander Blanquet, Andrew Stark, Bert Basch, Stephen E. Ralph

Proceedings Volume 8284, Next-Generation Optical Communication: Components, Sub-Systems, and Systems; 828408 (2012) https://doi.org/10.1117/12.909592
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

The constant envelope characteristic of CPM signal is particularly interesting for use in fiber optic links since it can be leveraged to avoid nonlinear phase modulation. Implementation complexity of CPM systems is generally higher than their QPSK counterpart, partly due to the nontrivial task of generating the signal as well as the need to observe the received signal over multiple symbol periods to make an optimal decision. Because of this complexity, the use of full-response CPM systems is favorable for complexity since optimal reception is achieved with lower order, however, partial response systems can achieve higher minimum distance. We analyze parameter selection for CPM transmission, optimizing error performance and spectral efficiency in a tightly filtered reconfigurable optical add-drop multiplexor (ROADM) application. We illustrate their impact on the normalized minimum Euclidean distance (as a proxy for error performance). The impact of parameters on spectral efficiency is implicit on the choice of ROADM filters. The results provide guidance for a suitable choice of CPM scheme for consideration in DWDM systems. Optimal parameters are given for full and partial response systems for a variety of filter scenarios.

Citation Download Citation

Thomas Detwiler, Alexander Blanquet, Andrew Stark, Bert Basch, and Stephen E. Ralph "Continuous phase modulation parameter optimization for DWDM systems", Proc. SPIE 8284, Next-Generation Optical Communication: Components, Sub-Systems, and Systems, 828408 (24 January 2012); https://doi.org/10.1117/12.909592

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KEYWORDS

Dense wavelength division multiplexing

Phase modulation

Electronic filtering

Nonlinear filtering

Optical filters

Fiber optics

Nonlinear optics

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