Abstract
The interference transmission spectrum of the cascaded long-period fiber gratings, between which inserted a section of fiber, is investigated. Analytic expressions for the interference spectrum are derived, from which insightful physical meanings can be seen, such as the fringe spacing dependences, the maximum peak loss dependences. Based on the design criteria, we used the Levenberg- Marquardt (LM) method to design a flattened spectrum with transmission loss of nearly 50%. A useful device of tunable multi-channel isolation filter was designed by cascading two such identical long period fiber gratings. This device has great potential to be used for wavelength-division-multiplexed optical communication systems.
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.
