Performance Analysis of Instantaneous Frequency Measurement Using Photonics Technique for Different Types of Dispersion Compensating Fibers

Performance of Photonic Instantaneous Frequency Measurement (P-IFM) technique for different dispersion compensation in various types of fibers is investigated. In this technique, an unknown microwave signal is coupled with laser and sent through Mach-Zehnder modulator (MZM). The optical output from the MZM is sent through dispersive fibers to introduce different chromatic dispersions, leading to different microwave power penalties. A fixed relationship between the microwave power ratio and the microwave frequency is established. As constituent parameters, span-length and dispersion coefficient both are found to be strongly influential regarding measured frequency. Different fibers like Short Period Dispersion Managed Fibers (SPDMF), Non-Zero Dispersion Shifted Fiber(NZDSF) and also Dispersion Compensated Fiber (DCF) is compared with traditional Single Mode Fiber(SMF), and found dispersion compensation and span length of the fibers have significant effect in measured ACF(Amplitude Comparison Function)and frequency bandwidth , thus on performance of the technique.