Patent ID: 6185347
Filing Date: 2001-02-06
Classification: G02B

Abstract:
A WDM coupler comprising:a first GRIN lens attached to a WDM filter via a first epoxy;a first holding tube holding and securely bonding to said first GRIN lens with a second epoxy;a dual optical fiber pigtail disposed at a first optimal gap from said first GRIN lens to achieve a lowest reflection loss;a second holding tube holding and securely bonding to said dual optical fiber pigtail with a third epoxy and said first and second holding tubes being further securely bonding to each other with said third epoxy for maintaining said first optimal gap between said first GRIN lens and said dual fiber pigtail;a single fiber pigtail disposed at a second optimal distance from a second GRIN lens and a third holding tube holding and securely boding to said single fiber pigtail and said second GRIN lens therein with a fourth and a fifth epoxies for maintaining said second optimal distance;said first holding tube holding said first GRIN lens in physical contact and securely boding to said third holding tube holding said second GRIN lens with a sixth epoxy wherein said first GRIN lens is aligned with said second GRIN lens.