Abstract
A highly-birefringent phase-shifted fiber Bragg grating (PS-FBG) was inscribed with femtosecond laser and a uniform phase mask. The PS-FBG was fabricated from an ordinary FBG in case over exposure was applied. The spectral evolution from FBG to FS-FBG was observed in accompany with a decrease in transmission loss, a ‘blue’ shift of dip wavelength, a decrease in cladding mode loss, and an increase in insertion loss. High birefringence was demonstrated experimentally with the existence of PS-FBG only in TM polarization. The formation of the PS-FBG may probably due to a negative index change induced by the high-intensity center of Gaussian laser beam.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.