Assemble method of optical isolator and measurement method of isolation

摘要

A method of assembling an optical isolator according to the present invention comprises arranging a light source, a lens system, a polarizer, an analyzer and a light receiver in this order so that light passing through the lens system, the polarizer and the analyzer is emitted by the light receiver A step of arranging an optical element constituting an optical isolator main body between the polarizer and the polarizer; measuring a maximum value and a minimum value of the level of light received by the light receiver while rotating the analyzer; Calculating the ratio of the minimum value to the maximum value, and adjusting the rotational position of each optical element constituting the sake optical isolator main body so that the ratio becomes minimum.