Title :
Linearized Optical Single-Sideband Mach–Zehnder Modulator for Radio-Over-Fiber Systems
Author :
Masella, Biagio ; Zhang, Xiupu
Author_Institution :
Concordia Univ., Montreal
Abstract :
We propose and investigate a linearized optical single-sideband (OSSB) Mach-Zehnder modulator (MZM) for radio-over-fiber systems. The linearized MZM makes use of a dual electrode z-cut LiNbO3 MZM with linear polarizers placed before and after it, respectively. By carefully selecting the angles of the two linear polarizers, third-order intermodulation and second-order distortion can be suppressed significantly. More importantly, it will be shown that with this linearized modulator, not only can OSSB modulation be obtained, but also an improvement in spurious free dynamic range of 15 dB is achieved as compared to the conventional MZM.
Keywords :
intermodulation distortion; lithium compounds; optical distortion; optical modulation; optical polarisers; radio-over-fibre; LiNbO3; RF photonics; dual electrode z-cut modulator; linear polarizers; linearized optical single-sideband Mach-Zehnder modulator; microwave photonics; nonlinear distortion; optical fiber communications; radio-over-fiber systems; second-order distortion; subcarrier modulation; third-order intermodulation; Amplitude modulation; Electrodes; Fiber nonlinear optics; Nonlinear distortion; Nonlinear optics; Optical distortion; Optical mixing; Optical modulation; Optical polarization; Radio frequency; Microwave photonics; RF photonics; nonlinear distortion; optical fiber communications; subcarrier modulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.908451
