18 May 2012 Simple method for measuring the cleave angle of optical fiber facets by using the nodal points of a cylindrical lens
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Abstract
A simple experimental setup for measuring the cleave angle of optical fiber facets by using a plano-convex cylindrical lens is presented. In this method, a laser beam is coupled to the perpendicularly cleaved input fiber facet and propagates up to the output end, where the fiber facet is cleaved at a certain angle. The divergent beam emerges from the output end fiber at an angle determined by the cleave angle and impinges at the cylindrical lens through a very narrow slit. The slit is placed in contact with the vertex of the convex side of the cylindrical lens and parallel to its axis. The slit-lens assembly is moved perpendicular to the optical axis of the lens so that the marginal rays of the incident beam pass through the slit. Using the output angles from marginal rays of the refracted beam by the cylindrical lens, it is possible to calculate the output angle of the principal ray and, by measuring this angle, the cleave angle can be estimated.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Victor M. Durán Ramírez, Victor M. Durán Ramírez, Alejandro Martinez-Rios, Alejandro Martinez-Rios, Guillermo Salceda-Delgado, Guillermo Salceda-Delgado, Ismael Torres-Gomez, Ismael Torres-Gomez, } "Simple method for measuring the cleave angle of optical fiber facets by using the nodal points of a cylindrical lens," Optical Engineering 51(5), 059702 (18 May 2012). https://doi.org/10.1117/1.OE.51.5.059702 . Submission:
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