Effective Index and Mode Width Sensitivities to Opto-Geometrical Parameters on Index-Guided Photonic Crystal Fibers

The effective index and fundamental mode width behavior on modified total internal reflection (MTIR) photonic crystal fibers is studied in a wide normalized frequency (Lambda/lambda) area. The sensitivities to the structural and opto-geometrical parameters are obtained and the higher sensitivity region is clearly identified. The fabrication tolerance expression is also shown. Conclusions from this letter will be useful for designing and fabrication processes, also for using MTIR fibers on optical devices such sensors.