Optical waveguides – With disengagable mechanical connector – Structure surrounding optical fiber-to-fiber connection
Patent
1992-03-10
1993-06-01
Healy, Brian
Optical waveguides
With disengagable mechanical connector
Structure surrounding optical fiber-to-fiber connection
385 52, 385 78, 385 80, 385139, 385 11, G02B 626
Patent
active
052167330
ABSTRACT:
This invention presents a method and an apparatus for adjusting the axial orientation angle between the principal axis of a polarization maintaining fiber (PMF) and a ferrule with ease and precision. The invented ferrule is composed of a ferrule body, having a through hole into which a PMF is inserted, and a ring-shaped flange, having a keyway on the circumferential rim, installed on the outer periphery of the ferrule body. An engaging part is provided on the periphery to restrain the forward movement of the ferrule body by engaging with the flange. The invented ferrule enables adjustment of the axial angle, between the principal axis of the PMF and the keyway of the flange, to be made after adhesively bonding the PMF onto the ferrule body and polishing the end of the fiber. Therefore, the axial angle adjustment is carried out conveniently and accurately, without being affected by the processing effects, such as curing of the adhesive. Further, when the cable joint is made by joining the plugs, even if the spring compression forces, acting to press together the ferrule bodies, acted on the flange, the forward movement of the flange is restrained by the engaging part, thereby minimizing the adverse residual stress effects on the optical performance properties of the cable.
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Ando Yasuhiro
Nagase Ryo
Healy Brian
Nippon Telegraph and Telephone Corporation
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