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Optical signal system, for a railway shunting yard, has a green-emitting laser coupled to an optic fiber along at least part of the length of connecting cable, giving externally visible illumination
Optical signal system, for a railway shunting yard, has a green-emitting laser coupled to an optic fiber along at least part of the length of connecting cable, giving externally visible illumination
The optical signal system for a railway shunting yard has a connecting cable (1) to carry optical or electrical signals. The connecting cable has at least one light conductor (6) at least along a part of it, coupled to a light source (5) at one end to give a visible external illumination using a green-emitting frequency-doubling Nd-YAG laser. The light conductor is a polymer optic fiber (3). The polymer fiber has a coupling (4) at both ends, with a moving shutter within a center drilling.
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