Optical waveguides – With optical coupler – Input/output coupler
Patent
1998-03-30
2000-09-19
Ngo, Hung N.
Optical waveguides
With optical coupler
Input/output coupler
385 34, 385 47, G02B 626
Patent
active
061224200
ABSTRACT:
An optical loopback apparatus provides a basis for miniaturizing the loop back mechanism so as to enable optical attenuation and wavelength multi/demultiplexing operations to be carried out in a compact device. An optical fiber unit has two single core fibers for input and output fiber paths. By aligning the central axis between the cores with the optical axis of a lens having a refractive index distribution of 0.25 pitch, the input beam into the apparatus is wholly reflected back 180 degrees by a total reflection film provided at the output terminal surface of the lens. In another arrangement, the optical axis of all four components: the central axis of the input and output fiber paths; the first lens; a second lens and a second optical fiber; are aligned, then, an input beam into the first lens is partially looped back 180 degrees at the reflective film.
REFERENCES:
patent: 5181264 (1993-01-01), Chiaretti et al.
patent: 5757993 (1998-05-01), Abe
Ando Electric Co. Ltd.
Ngo Hung N.
LandOfFree
Optical loopback apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical loopback apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical loopback apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1081662