Photonic Crystal Fibre (PCF) has zero dispersion at 1.55µm wavelength compared to the standard single mode fibre (18ps/nm/km) and also sometimes negative dispersion occurs for the telecommunication wavelength range of 1.2 to 1.8µm wavelength such as the effects of air holes.The PCF design parameters on the effective index, effective mode area (9.021 µm 2 , confinement losses (0.0082 dB/m), and birefringence have been carefully investigated for the telecommunication wavelength range of 1.2 to 1.8µm wavelength.
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Nagaraju Naddi (2017) studied this question.
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