Title :
Intermodulation Distortion of a Comb-Based RF Photonic Filter Using Balanced Detection
Author :
Hyoung-Jun Kim ; Weiner, Andrew M.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
We investigate intermodulation distortion of a tunable radio frequency photonic filter utilizing an optical frequency comb, an interferometric configuration, and a balanced detection. When the filter passband is tuned from 2 to 7 GHz, this scheme has the third-order spurious free dynamic range of <;108.2 dB·Hz2/3. In addition, we investigate the effect of Mach-Zehnder modulator (MZM) configuration on second-order intermodulation. A high extinction ratio MZM results in 43-dB lower power in the second-order intermodulation tones compared with that obtained with a conventional MZM.
Keywords :
Mach-Zehnder interferometers; intermodulation distortion; microwave photonics; optical filters; optical frequency combs; optical modulation; radiofrequency filters; Mach-Zehnder modulator configuration; balanced detection; comb-based RF photonic filter; conventional MZM; filter passband; frequency 2 GHz to 7 GHz; high extinction ratio MZM; interferometric configuration; intermodulation distortion; optical frequency comb; second-order intermodulation tones; third-order spurious free dynamic range; tunable radiofrequency photonic filter; Microwave filters; Optical distortion; Optical fiber filters; Optical interferometry; Photonics; Radio frequency; Frequency comb; balanced detection; intermodulation distortion; microwave photonics; spurious free dynamic range; tunable filters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2470667
