There are currently three methods of looking inside a fiber optic connector: (1) Non-destructive X-ray (2) Lossless sonar (3) Destructive cross section These methods help engineers determine the causes and effects of fiber optic connector failures and monitor the connector. There are currently three methods of looking inside a fiber optic connector: (1) Non-destructive X-ray (2) Lossless sonar (3) Destructive cross section These methods help engineers determine the causes and effects of fiber optic connector failures and monitor the connector. There are currently three methods of looking inside a fiber optic connector: These methods help engineering determine cause and effect of failure of the fiber optic connector and monitor assembly process of the connector. All three methods have advantages and disadvantages highlighted here: High. An optical fiber connector is a device used to link optical fibers, facilitating the efficient transmission of light signals. An optical fiber connector enables quicker connection and disconnection than splicing. They have a central core surrounded by a concentric cladding with slightly lower (by ≈ 1%) refractive index. With current architectures, this parallel optic demarcation occurs through multi-fiber bulkhead or blind-mateable connectors which employ traditional MT.