Abstract
We study bend loss in chalcogenide negative curvature fibers with different polarizations, different tube wall thicknesses, and different bend directions relative to the mode polarization. The coupling between the core mode and tube modes induces bend loss peaks in the two non-degenerate modes at the same bend radius. There is as much as a factor of 28 difference between the losses of the two polarization modes. The fiber with a larger tube wall thickness, corresponding to a smaller inner tube diameter, can sustain a smaller bend radius. The bend loss is sensitive to the bend direction when coupling occurs between the core mode and tube modes. A bend loss of 0.2 dB/m at a bend radius of 16 cm, corresponding to 0.2 dB/turn, can be achieved in a chalcogenide negative curvature fiber.
Highlights
Hollow-core photonic crystal fibers have the potential to provide low-loss transmission, along with delivery of high-power light with low nonlinearity
We find that a fiber with a larger tube wall thickness, corresponding to a smaller inner tube diameter, can sustain a smaller bend radius
The bend loss peaks are induced by the resonant coupling between the core mode and tube modes
Summary
Hollow-core photonic crystal fibers have the potential to provide low-loss transmission, along with delivery of high-power light with low nonlinearity. Several structures have been suggested to suppress higher-order modes using the resonant coupling between the higher-order core modes and cladding modes [30,31,32,33,34,35,36]. Another important limiting factor in fiber devices is the bend loss. Bending-induced higher-order mode suppression has been obtained using the resonant coupling between the higher-order core modes and the tube modes in negative curvature fibers [41]. We study the bending-induced mode coupling for the non-degenerate core modes in chalcogenide negative curvature fibers.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
