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10 - Photonic link techniques for microwave frequency conversion

Published online by Cambridge University Press:  06 July 2010

By
Stephen A. Pappert ,
Roger Helkey  and
Ronald T. Logan
Edited by
William S. C. Chang
Stephen A. Pappert
Affiliation:
Lightwave Solutions, Inc., San Diego
Roger Helkey
Affiliation:
MIT Lincoln Laboratory (presently with Calient Networks)
Ronald T. Logan
Affiliation:
JDS Uniphase (presently with Phasebridge, Inc.)
William S. C. Chang
Affiliation:
University of California, San Diego
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Summary

Introduction

Microwave frequency conversion techniques using analog photonic link technology are reviewed in this chapter. Opto-electronic or photonic radio-frequency (RF) signal mixing refers to converting intensity modulation of an optical carrier at one modulation frequency to intensity modulation or an electrical output at a different frequency. Frequency conversion optical links integrate the functions of electrical frequency mixing, traditionally provided by electronics, together with the transport of the RF carrier by the optical link. Photonic RF signal mixing using fiber optic link technology has recently become a topic of interest for reducing front-end hardware complexity of antenna systems and efficiently extending link frequency coverage into the millimeter-wave (MMW, 30–300 GHz) range. As commercial and military systems push to higher operating frequencies, microwave optical transmission and signal conversion techniques offer attractive benefits to designers of RF systems for communications, radar and electronic warfare applications

The frequency converting link diagram displayed in Fig. 10.1 can be used to introduce the concept of photonic link signal mixing as well as to introduce some nomenclature that will be used throughout the chapter. Here, an example antenna remoting configuration is shown that incorporates both optical RF up-conversion for transmit operation and optical RF down-conversion for receive operation. Referring to the transmit-mode up-conversion path of Fig. 10.1, the photonic frequency conversion occurs by multiplying the MMW optical local oscillator (LO) signal at fLO1, with the lower frequency RF input or information bearing signal at fIF1 in the integrated optical modulator (IOM).

Type
Chapter
Information
RF Photonic Technology in Optical Fiber Links , pp. 293 - 334
Publisher: Cambridge University Press
Print publication year: 2002

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Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

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Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

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