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Chapter: Fiber optics and Laser instruments : Optical Fiber and Their Properties

Connectors and fiber termination

(i) Butt-joint connectors (ii) Expanded beam connectors

Connectors and fiber termination

 

(i) Butt-joint connectors

 

It is made up of a special type of material called ferrule, composing of metal/glass/plastic materials. The fiber is send into the drilled hole of the ferrules and is aligned properly with the help of the alignment sleeve. The distance between the fibers is minimized by adjusting the alignment sleeve and the guide ring, and is used to match the ends of the fibers. Once the matching was done, the light from one fiber can be easily coupled to the other fiber with minimum losses.


(ii) Expanded beam connectors:

 

It consists of a collimating lens at the end of transmitting fiber and focusing lens at entrance of the receiving fiber. Light coming out from the transmitting fiber is made to fall over the collimating lens. The collimating lens makes the beam parallel and is focused into the focusing lens. After passing through the focusing lens, the light is coupled into the receiving fiber without any loss. Thus the loss is minimized.


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Fiber optics and Laser instruments : Optical Fiber and Their Properties : Connectors and fiber termination |


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