Optical Fiber Breaks Due to Buckling: Problems in Device Packaging

Elimination of Optical Fiber Breaks in Stainless Steel Packages for LiNbO3Optical Modulator Devices

“…The results indicated that with an improper combination of the fiber jacket (nylon) and adhesive (A) materials, a fiber protrusion as long as 2 mm occurred within ordinary device operation and storage temperature ranges. This length was enough to buckle and to break the metallized fiber which was held within the short gap (5 mm in the present structure) [22]. Even in the combination of the nylon jacket and the stronger adhesive E, the protrusion length was larger than those of PVC and UV-400 fibers.…”

“…Fortunately, such failed fibers can be rejected by proof tests such as a bending test [16,21]. Further, undesirable fiber buckling in the ferrule (or fiber feedthrough pipe) has been strongly indicated as a reason for the fiber breaks [3,22].…”

Mechanical Reliability of LiNbO3Optical Modulators Hermetically Sealed in Stainless Steel Packages

“…The fiber jacketed with uv-cured resin materials (0.4 mm outer diameter, Fujikura UV-400) was used. These fibers were known to be significantly improved against possible fiber breakage due to thermal contraction of the jacket materials [7,8]. The glass fiber surface was coated with a Ni layer and further with a Au layer using an electroless plating technique.…”

Failure Case Study for Loose Tube Jacketed Optical Fibers

“…Engineering problems related to mechanical integrity in optical fiber devices have been investigated to estimate and ensure the long-term reliability of the devices during ordinary use. More severe demands from marine and terrestrial fiber communication systems, and recently from satellite systems, have resulted in the present highly reliable and stable states of optical fiber devices [1][2][3][4]. Standards for such devices are also established based on huge amounts of experimental data from device and system manufacturers [5].…”