Fiber-optical pressure sensor with contacting lightwave conductors

A fiber-optical sensor, comprising a light transmitter device (6) which couples transmitted light into at least one first lightwave conductor, and also comprising a light receiver device (7) which receives light from the first lightwave conductor and at least one second lightwaveconductor, the lightwave conductors (3, 4) comprising adjacently situated portions between which light can be coupled, and wherein the light transmitter device (6) couples a first transmitted light into the first lightwave conductor (3, 4) and a second transmitted light into the second lightwave conductor (4, 3), the adjacently situated portions (1) of the lightwave conductors (3, 4) being accommodated together in an envelope (5) via which a pressure or force acts on the lightwave conductors (3, 4), portions of the lightwave conductors (3, 4) contacting one another in a light-transferring manner under the influence of said pressure or force.