BEAM PROFILING MEASUREMENTS OF FAR-FIELD FROM PLASTIC OPTICAL FIBRE PASSIVE DEVICES

摘要

This paper reports preliminary results on the investigations of the beam profiling measurements using an image technique set-up. The records are made by means of CCD camera coupled to a computer frame grabber, used to capture the beam far-field profile from systems taking into account links of single POFs, and links containing passive POF-devices as connectors and couplers. The free distributed ImageJ, an image analysis software, was used to pre-processing the acquired beam profile images. The known model of effective numerical aperture NA_(eff) is used to estimate the bandwidth. Comparisons among the far-field and bandwidths for POFs with and without passive devices are done.