Enhanced Raman Amplification in Hybrid Photonic Crystal Based Waveguide Structure by Using Optofluidic Materials

In this paper, we propose a hybrid photonic crystal Raman amplifier structure which in this structure using engineered nanoholes filled with optofluidic material in the signal and pump paths, we reduce pump and signal group velocity to improve the structure and achieve larger Raman gain and bandwidth. Geometrical parameters are changed to obtain enhanced Raman amplification with a greater gain and broader bandwidth. The Maxwell equations are solved using finite difference time domain method considering two photon absorption, free carrier absorption, kerr effect and self phase modulation (SPM) effects. Finally, by injecting 3 pumps with appropriate wavelength and power into the Raman amplifier structure with amplification length of 350 μm, we increased the Raman gain to 10.06 dB and Raman bandwidth to 5.72 nm.