Patent ID: 7333693
Filing Date: 2008-02-19
Classification: G02B

Abstract:
1. An optical tap module comprising: a first optical fiber and a second optical fiber disposed in parallel and apart from each other at a predetermined distance; a first lens having a first end surface thereof arranged to face to end surfaces of said input and second optical fibers, and by which light emitted from said first optical fiber is collimated; a second lens having a first end surface thereof facing to a second end surface of said first lens, an optical filter arranged to face to said second end surface of said first lens, said optical filter being configured to transmit a part of collimated light from said first lens and to reflect another part of the collimated light without having wavelength dependency; and a photodiode having an active area disposed to face to a second surface of said second lens, whereby light from said first optical fiber emitted from said second lens is incident on said active area and light from said second optical fiber emitted from said second lens is directed away from said photodiode; wherein said first lens and said second lens are integrally fixed, interposing said optical filter therebetween, so that center axes of said first lens and said second lens are aligned with each other.