OPTICAL FIBER WITH THIN FILM COATING AND CONNECTOR
An article comprises an optical fiber having a first end with a first end surface having a deposited coating only on a portion thereon. The first end can have a frustoconic or tronconic shape. The optical fiber can be utilized as a stub fiber in an optical device, such as an optical connector, receptacle or adapter. The deposited coating can be a wavelength selective multilayer thin film coating. The deposited coating can reflect a selected wavelength of light back to a central office to provide monitoring in a communication network, such as a PON.
1 . An article comprising:
an optical fiber having a first end with a first end surface having a deposited coating only on a portion thereof.
2 . An article comprising:
an optical fiber having a frusto-conical or tronconic first end with a first end surface having a deposited coating only on a portion thereof.
3 . (canceled)
4 . The article of claim 1 , wherein the deposited coating comprises a wavelength selective multilayer thin film filter coating.
5 . The article of claim 1 , wherein the first end surface comprises a continuous frusto-conical or tronconical shape having a tip surface and a radial side surface having an angle of greater than 10 degrees and less than 30 degrees with respect to an optical axis of the fiber.
6 . The article of claim 1 , wherein the first end surface comprises a frusto-conical or tronconical shape having a tip surface and a plurality of radial side surfaces each having an angle of greater than 15 degrees and less than 25 degrees with respect to an optical axis of the fiber.
7 . The article of claim 5 wherein the radial side surface is free of the deposited coating.
8 . The article of claim 6 wherein the radial side surfaces are free of the deposited coating.
9 . The article of claim 1 , wherein the deposited coating is substantially uniform on the tip portion of the first end surface.
10 . The article of claim 1 , wherein the deposited coating is configured to pass light having a wavelength of from about 1260 nm to about 1620 nm and reflect light having a wavelength of about 1640 nm to about 1690 nm.
11 . An optical connector comprising the article of claim 1 .
12 . The optical connector of claim 11 , comprising a ferrule that holds the optical fiber.
13 . The optical connector of claim 12 , further comprising a mechanical splice device, wherein the first end of the optical fiber mates with a field fiber in a splice element of the mechanical splice device.
14 - 16 . (canceled)
17 . A passive optical network (PON) comprising the optical connector, of claim 11 .
18 . The PON of claim 17 , wherein the deposited coating is configured to reflect a selected wavelength of light back to a central office of the PON to provide monitoring.
19 . The article of claim 2 , wherein the deposited coating comprises a wavelength selective multilayer thin film filter coating.
20 . The article of claim 2 , wherein the first end surface comprises a continuous frusto-conical or tronconical shape having a tip surface and a radial side surface having an angle of greater than 10 degrees and less than 30 degrees with respect to an optical axis of the fiber.
21 . The article of claim 2 , wherein the deposited coating is substantially uniform on the tip portion of the first end surface.
22 . The article of claim 2 , wherein the deposited coating is configured to pass light having a wavelength of from about 1260 nm to about 1620 nm and reflect light having a wavelength of about 1640 nm to about 1690 nm.
23 . An optical connector comprising the article of claim 2 .