Fabrication of all-solid photonic bandgap fiber coupler

摘要

We report the fabrication of a tunable all-solid photonic bandgap fiber coupler based on the side-polishingtechnique. This device is believed to be the first demonstration of a photonic bandgap fiber coupler to eliminate the contamination of the open air holes. By adjusting the length of the interaction section, the tunable coupling ratio as much as 92.5percent at 1550 nm is achieved. The investigation of the spectrum properties shows that the coupler has excellent tunability properties, for which the coupling ratio can be smoothly and continuously controlled.