In this paper, we analyze the performance of the photonic crystal Fano laser. Our aim is to investigate the effects of modifying the nanocavity structure by changing the air holes radius around nanocavity on the Fano laser performance. 3-D Finite Element Method is used to solve the governing equations of the Fano laser. The Fano laser performance the air holes radius of 109 nm was experimentally reported recently. To achieve optimized output pulse, the air holes radius around nanocavity is changed from 50 nm to 130 nm. This optimized pulse should have standard Gaussian pulse shape, with minimum achievable full width at half maximum (FWHM) and maximum transmission. Based on our simulation the optimized Fano laser performance for the air holes radius around nanocavity of 80 nm is observed. For this radius, the FWHM, maximum transmission and correlation with standard Gaussian pulse, 22.878GHz, 0.9578 and 0.9971 are respectively computed.
