Title :
Low Noise Figure Microwave Photonic Link
Author :
Karim, Adil ; Devenport, Jason
Author_Institution :
L-3 Photonics, Carlsbad
Abstract :
The noise figure of an analog fiber-optic link was reduced to 6 dB at 1 GHz by using a bias-shifted Mach-Zehnder modulator with an optical input power of 1 W. The link noise figure was less than 14 dB for modulation frequencies from 1-18 GHz. This level of performance was achieved without electronic pre-amplification. A linearized microwave photonic link using this noise reduction approach has been demonstrated with a spurious-free dynamic range of 130 dB in a 1 Hz bandwidth.
Keywords :
electro-optical modulation; interference suppression; microwave links; microwave photonics; radio-over-fibre; analog fiber-optic link; bandwidth 1 Hz; bias-shifted Mach-Zehnder modulator; electro-optic modulation; frequency 1 GHz to 18 GHz; microwave photonic link; modulation frequency; noise figure; noise figure 130 dB; noise reduction approach; power 1 W; Distributed feedback devices; Noise figure; Optical distortion; Optical feedback; Optical filters; Optical interferometry; Optical modulation; Optical noise; Radio frequency; Voltage; Analog systems; electro-optic modulation; modulation; noise; optical fiber communication; optoelectronic devices;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380561
