Maximum dynamic range operation of a microwave external modulation fiber-optic link

We fully analyze the analog performance of an external modulation fiber-optic link. We express relevant figures of merit-including gain, noise figure, third-order intermodulation distortion, AM compression, and dynamic range-in terms of the microwave scattering matrices of the modulator and detector...

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Veröffentlicht in:	IEEE transactions on microwave theory and techniques 1993-08, Vol.41 (8), p.1299-1306
Hauptverfasser:	Ackerman, E., Wanuga, S., Kasemset, D., Daryoush, A.S., Samant, N.R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Detectors Distortion measurement Dynamic range Electric, optical and optoelectronic circuits Electronics Exact sciences and technology Gain measurement Intermodulation distortion Microwave circuits Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits Noise figure Optical scattering Performance analysis Performance gain
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Zusammenfassung:	We fully analyze the analog performance of an external modulation fiber-optic link. We express relevant figures of merit-including gain, noise figure, third-order intermodulation distortion, AM compression, and dynamic range-in terms of the microwave scattering matrices of the modulator and detector circuits, and we predict the modulator bias condition promoting optimum link performance. Our predictions match the measured gain, noise figure, and dynamic range of an experimental 870-930 MHz external modulation fiber-optic link. Maximum spurious-free dynamic range-77 dB.MHz/sup 2/3/ (117 db.Hz/sup 2/3/)-occurs when the modulator is biased at its halfwave voltage, where the optical throughput is nearly pinched off.< >
ISSN:	0018-9480 1557-9670
DOI:	10.1109/22.241670