Analysis of Mach-Zehnder Interferometer with One Arm Loaded with Ring Resonator for Radio Over Fiber Applications

Abstract: The problem that exists in Mach-Zehnder modulator subjected to high frequency input signals, will produce inter modulation distortion and harmonic distortion due to its non-linear nature. These distortions are limiting the performance of the analog optical links. To overcome these distortions, Mach-zehnder interferometer with one arm loaded with double micro ring resonator is widely used. The advantage of the double micro ring resonator acts as a second-order all pass filter and it provide not only very low non-linear distortion but also high slope efficiency, resulting in high output radio frequency gain, which is desirable for analog links. The linearity to the Mach-Zehnder modulator based on the amplitude reflection coefficients of the two micro ring resonators. The paper is concerned with analysis of Radio over fibre link based on external modulation using Mach Zehnder modulation with one arm loaded with ring resonator for GSM signal transmission