new concept photosensitive fiber
The high Germanium (Ge) doped photosensitive fiber was widely used for Fiber Bragg Grating (FBG) applications. Its birefringence and cladding mode coupling characters greatly influence the FBG's transmission character. A new concept of photosensitive fiber was introduced, with the optimised birefringence and cladding mode depressed design. The FBG write by this new fiber has ~25dB clad mode-depressed ratio and its PMD value were less than 0.045ps.
optical fiber stability defect drawing process uv transmission