Interferometer for carrying out an optical coherence tomography

An interferometer for carrying out optical coherence tomography, wherein the interferometer has at least one first part and one second part, which are spatially separate from one another, and wherein the first part and the second part are movable relative to one another, and wherein the two parts are optically connected to one another by at least one light-conducting fiber,

• wherein the connecting light-conducting fiber is designed as a polarizing fiber, which favors the propagation of a specific polarization state or polarization mode and obstructs or suppresses the propagation of other polarization states or polarization modes;
• wherein a first beam splitter is provided, with which the light of a light source is split into light of a reference arm and light of the sample arm;
• wherein two polarization setting units are provided, with which the light of the reference arm and the light of the sample arm is each converted or transformed into identically polarized light waves,
• wherein a first polarization setting unit is inserted before the polarizing fiber and in the course of a single-mode fiber of the sample arm, and
• wherein a second polarization setting unit is placed in the reference arm.