Patent ID: 7440652
Filing Date: 2008-10-21
Classification: G02B

Abstract:
1. A wavelength division multiplexed coupler comprising: a first collimator comprising a single fiber pigtail, a first GRIN lens, and a first, one piece holding tube, the first GRIN lens and the single fiber pigtail being retained in the first holding tube; a second collimator comprising a dual fiber pigtail, a second GRIN lens, and a second, one piece holding tube, the second GRIN lens being arranged on an end surface of the dual fiber pigtail, and the dual fiber pigtail being retained in the second holding tube; an optical filter arranged on an end surface of the second GRIN lens of the second collimator; a one piece, outer glass sleeve bridging the first and second collimators, said outer glass sleeve being positioned radially outwardly from said holding tubes of said first and second collimators and surrounding said holding tubes of said first and second collimators along at least a portion of their lengths; and UV-curing epoxy between the outer glass sleeve and the holding tubes of the first and second collimators for securing the first and second collimators to the one piece, outer glass sleeve.