In this paper all the key parameters i.e. V-Number, effective refractive index of the cladding, radius of the core,
numerical aperture, mode field diameter (MFD) and mode field area have been obtained by Far-Field intensity
pattern of endlessly single mode Photonic Crystal Fiber (ESM-PCF). The transmission characteristics of PCF are also
analyzed and simulated using Improved Effective Index Method (IEIM). Results obtained from Far-field technique
and IEIM are compared and found in good agreement. Hence, IEIM is experimentally supported by the far field
technique.
The development of theoretical and experimental method for the characterization of Polarization Maintaining Photonic
Crystal Fiber (PM PCF) from far filed intensity measurements has been reported. To maintain the polarization in PCF
different air hole diameter along orthogonal axes adjacent to the core region has been introduced. This helps in creating
an effective index difference between the two orthogonal polarization modes. It is shown that air hole spacing (Λ), air
hole diameter (d) and effective cladding index differences of PM-PCF can also be obtained from its far field
measurements.
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