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Analytical expression for large signal transfer function of an optically filtered analog link
T Banwell1, A Agarwal, P Toliver
1Telcordia Technologies, Red Bank, New Jersey 07701, USA. bct@research.telcordia.com
Optics Express
|September 3, 2009
Summary
We derived a new formula for radio frequency photonic links, crucial for understanding and reducing signal distortion in these systems. This helps improve the linearity of electrical-optical-electrical signal transmission.
Area of Science:
- Photonics
- Electrical Engineering
- Signal Processing
Background:
- Radio frequency photonic links are essential for high-frequency signal transmission.
- Ensuring linearity in these links is critical for signal integrity and performance.
- Existing methods for analyzing distortion may be limited.
Purpose of the Study:
- To develop an analytical expression for the transfer function of optically-filtered radio frequency photonic links.
- To provide a method for evaluating distortion in these links.
- To discuss techniques for improving link linearity.
Main Methods:
- Derivation of an analytical transfer function for phase-modulated, coherent-detected photonic links.
- Analysis of nonlinearity as envelope distortion.
- Discussion of linearization strategies.
Main Results:
- An analytical expression for the transfer function was successfully derived.
- Nonlinearity was identified as a primary source of envelope distortion.
- Linearization techniques were proposed and discussed.
Conclusions:
- The derived transfer function is significant for evaluating and improving the linearity of radio frequency photonic links.
- Understanding envelope distortion is key to enhancing link performance.
- The study provides a foundation for further advancements in photonic link design.
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