Simulation of Mach Zehnder Interleaver based thermo-optic effect in L-Band range

Optical device based on Mach Zehnder Interferometer (MZI) is usually used as the optical switching, modulator and many applications in telecommunication networks. This paper discuss the Temperature Effect of Wavelength Division Multiplexing (WDM) Interleaver by using single and cascaded MZI. The Sellmeier equation is used to calculate the refractive index changing caused by the temperature changing. The output power of MZI is obtained by using matrix equation. The characteristic of output power varied with several temperatures between 28 and 300 degree Celsius. The wavelength used in this simulation is in L-Band region which is about 1570-1610nm. Temperature changing cause the changing of refractive index of material. The temperature changing leads to the shifting of wavelength channel which describe the characteristic of thermo optic effect on single and cascaded MZI.