Effect of temperature on modulational instability in normal region of CS2 core photonic crystal fiber with delayed nonlinear response

We theoretically investigated the effect of temperature on the process of modulation instability (MI) in the normal dispersive region of a CS2 core photonic crystal fiber (CSPCF) with delayed nonlinear response (DNR). The study shows that MI sidebands exhibit frequency shift in the normal dispersion region and the onset of such shift of Stokes and the anti-Stokes sidebands is highly dependent on temperature. Also, the temperature influences the bandwidth of Stokes and anti-Stokes sidebands and the same is reflected in the shift of optimum modulation frequency. However, the DNR plays a devastating role on the evolution of MI sidebands and suppress the later completely. With such a dominant behavior of the DNR, temperature does not play a major role except involving in the determination of the critical wavelength for the onset of MI suppression.