The interferometric method for ferrule geometrical parameters measuring and testing is presented. The geometrical
parameters are defined according to the IEC international standards. The quality of the ferrule face has important
influence on transmission parameters of optical connectors like the attenuation and reflectance.The measurements
results of the spherical height for FC-APC, SC-APC and E2000-APC are presented in this work. The high value of
protrusion has influence on thermal and mechanical resistance of optical connectors. The problem is presented for the
temperature and vibration tests.
The aim of work is to present results of interferometric measurements research of fiber connectors. The values of parameters are essential for attenuation and reflectance of connectors. There are presented result for PC and APC connectors and compared with international standards requirements (IEC standard, Bellcore standard).
There are presented the results of measurements of optical connector reflectance. The research BD ("branching device") method of reflectance measurements have given the dependence on patchcord (fiber) length. The value of reflectance depends on the Rayleigh scattering at the place of mandreling obtained for BD measurement method. The correct measurements of connectors reflectance are made when distance between connector and modes cutoff place is 2-5 meters. The slope of reflectance curve is variable: 2dB/m (for the cut place 0-1 m), 0.5dB/m (2-5m).
The work presents simulation of transmission line results with the fiber standard ITU-T G.652. The parameters of Lorenz laser decide about electrical signal parameters like eye pattern, jitter, BER, S/N, Q-factor, scattering diagram. For a short line lasers with linewidth larger than 100MHz can be used. In the paper cases for 10 Gbit/s and 40 Gbit/s transmission and the fiber length 30km, 50km, and 70km are calculated. The average open eye patterns were 1*10<sup>-5</sup>-120*10<sup>-5</sup>. The Q factor was 10-23dB. In calcuations the bit error rate (BER) was 10<sup>-40</sup>-10<sup>-4</sup>. If the bandwidth of Lorenz laser increases from 10 MHz to 500MHz a distance of transmission decrease from 70km to 30km. Very important for transmission distance is a rate bit of transmitter. If a bit rate increase from 10Gbit/s to 40 Gbit/s, the transmission distance for the signal mode fiber G.652 will decrease from 70km to 5km.
In this work a problem of the nonlinear electromagnetic surface TM waves at a nonlinear interface is presented. There are given: solutions of Maxwell equations, solution of the dispersion equation and results for two media (medium 1 -- MBBA crystal, medium 2 -- YAG crystal). Dependences of the propagation constant (the electric field) and the power (the electric field) are shown in figures 1 - 3. Solutions of the equations can be applied in transmission of an optic signal, optical waveguides, polarization devices.