Abstract
We demonstrate the inscription of fiber Bragg gratings by 193 nm ArF excimer laser in microfibers drawn from the standard single mode telecommunication fiber. Fiber Bragg gratings are directly inscribed in a series of microfibers with diameter ranged from tens of μm to 3.3 μm without hydrogen loading or other treatment to photosensitize the microfibers. Four reflection peaks are observed where three correspond to high order mode resonances. The resonance wavelength depends on the fiber diameter and it sharply blueshifts as the diameter is decreased below 10 μm. The gratings are characterized for their response to ambient refractive index. The higher order mode resonance exhibits higher sensitivity to refractive index.
Highlights
In recent years micronfibers have attracted a great attention owning to its superiority in providing high fraction of evanescent fields, low loss through extreme bends, manageable large waveguide dispersion, high nonlinearity, good compatible to conventional fibers as well as compact and flexible structure [1,2,3,4]
We demonstrate the inscription of fiber Bragg gratings by 193 nm ArF excimer laser in microfibers drawn from the standard single mode telecommunication fiber
Fiber Bragg gratings are directly inscribed in a series of microfibers with diameter ranged from tens of μm to 3.3 μm without hydrogen loading or other treatment to photosensitize the microfibers
Summary
In recent years micronfibers have attracted a great attention owning to its superiority in providing high fraction of evanescent fields, low loss through extreme bends, manageable large waveguide dispersion, high nonlinearity, good compatible to conventional fibers as well as compact and flexible structure [1,2,3,4]. X. Fang et al reported FBGs fabricated in microfiber by the use of 800 nm femtosecond laser [14], where the grating was formed by physical damage of the microfibers. A microfiber drawn from single mode fiber almost loses its photosensitivity to ultraviolet exposure because the Ge-doped region becomes very tiny. To overcome this problem, in [15] a specially designed fiber with a Ge/B-codoped photosensitive inner cladding was used as raw material to maintain the photosensitivity, and extra hydrogen loading was performed to enhance the photosensitivity, which significantly increases the cost and difficulty of the fabrication of FBGs in microfibers. The RI sensitivity of the FBGs in microfibers was characterized
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
