Abstract
Because of its high demodulation precision, arrayed waveguide grating (AWG) demodulation has recently gained popularity. However, due to the limitations in AWG output characteristics, previously reported AWG-based interrogation systems cannot achieve high resolution and a wide dynamic range simultaneously. Herein, we designed and fabricated a monolithically integrated novel silicon-on-insulator (SOI)-based AWG as a critical component of the fiber Bragg grating interrogation system. The fabricated AWG’s input waveguide is modified by inserting a 1 × 2 multimode interference (MMI) coupler into it. The combination of an input waveguide and an MMI coupler adds another peak to the AWG translation spectrum, indicating that at least two output channels have a significant signal at any measured wavelength. Furthermore, the core size of the AWG is small (482 × 710 um2), while the measurement resolutions and dynamic ranges are large. The optimized AWG with low crosstalk (−16.78 dB), a wide dynamic range (28 nm), and a high resolution (1 pm) has excellent performance potential and is a prospective component for fiber Bragg grating interrogation.
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.
