Title :
Microwave analog optical links using suboctave linearized modulators
Author :
Betts, G.E. ; O´Donnell, F.J.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
Abstract :
We report experimental links at frequencies up to 4 GHz which use two integrated optical Mach-Zehnder interferometric modulators in series to reduce third-order intermodulation distortion. This design improves the intermodulation-free dynamic range (up to 88 dB with 1 MHz noise bandwidth is demonstrated) with no noise figure penalty relative to a link using a standard modulator. Detector current is low (<2 mA), which is necessary for the detector to provide adequate linearity.
Keywords :
Mach-Zehnder interferometers; electro-optical modulation; integrated optics; intermodulation distortion; optical fibre networks; optical noise; 1 MHz; 2 mA; MHz noise bandwidth; adequate linearity; detector current; integrated optical Mach-Zehnder interferometric modulators; intermodulation-free dynamic range; microwave analog optical links; noise figure penalty; standard modulator; suboctave linearized modulators; third-order intermodulation distortion; Detectors; Frequency; Integrated optics; Intermodulation distortion; Noise figure; Optical distortion; Optical fiber communication; Optical interferometry; Optical modulation; Optical noise;
Journal_Title :
Photonics Technology Letters, IEEE
