Analyzing return loss deterioration of optical fiber joints with various air-filled gaps over wide wavelength range

Faults and Novel Countermeasures for Optical Fiber Connections in Fiber-To-The-Home Networks

“…The return loss values at wavelengths of 1.31 and 1.55 μm were 11.2 and 18.9 dB, respectively. Even if the gap size and wavelength period were changed, the return losses varied as greatly as the values at a 10-μm gap [28]. These results indicate that an inspected fiber end can be considered uneven or flat depending on whether or not the measured return losses from the fiber end at two wavelengths are both ~14.7 dB.…”

Optical Performance Analysis of Single-Mode Fiber Connections

“…(9) and (10), respectively. To demonstrate these dependences, another experiment using an MT connector was performed (Kihara et al, 2010). A feeler gauge (thickness gauge tape) was set and fixed between the two MT ferrules of a connector with a certain gap size by using a clamp spring.…”

Fiber optic Fabry‐Perot interferometer based sensor for inspecting cleaved fiber ends

“…The return loss values at the 1.31‐ and 1.55‐μm wavelengths were 11.2 and 18.9 dB, respectively. Even if the gap size was changed and the wavelength period changed, the return losses varied as greatly as the values at a 10‐μm gap [8]. These results indicate that the inspected fiber end can be considered uneven or flat dependent on whether or not both the measured return losses from the fiber end at two wavelengths are equal to ∼14.7 dB.…”