Patent ID: 6582135
Filing Date: 2003-06-24
Classification: G02B

Abstract:
A method of making a multiple-port optical filtering device comprising the steps of:providing an optical filter characterized according to AOI of the filter; providing an input collimating assembly comprising a plurality of pairs of optical fibers, each of said pairs comprising an input fiber and a reflective fiber, said assembly characterized as a function of separation distances (SD) of said pairs of input and reflective fibers disposed in said assembly, said collimating assembly satisfying a predetermined tolerance for matching said separation distances and said AOI of said filter; mounting said filter in a filter-holding unit, said filter-holding unit comprising a cavity for mounting to said input collimating assembly, said cavity having a sufficiently large diameter to permit micro-tilting of said filter-holding unit relative to said collimating assembly; and optically aligning said filter and said collimating assembly such that insertion loss is within predetermined limits.