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Tailoring Chirp Characteristics of Waveguide Bragg Gratings Using Tapered Core Profiles
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- Authors
- Min Su Kim, Jung Jin Ju, Seung Koo Park, Myung Hyun Lee, Sang Hoon Kim, Ki Dong Lee
- Issue Date
- 2006-11
- Citation
- IEEE Photonics Technology Letters, v.18, no.22, pp.2413-2415
- ISSN
- 1041-1135
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- We propose and demonstrate the design principle of tapered core profiles for tailoring the chirp characteristics of waveguide Bragg grating (WBG) devices with uniform grating periods. Based on both numerical and experimental approaches, we establish the dependence of the modal effective index on the core width. We then design and fabricate polymeric WBG devices with a taper profile optimized for a linear group delay and those with a linear taper as well. Although they exhibit high ripples in their spectral responses due to incomplete structures, their chirp characteristics fit well the expected group delay curves. © 2006 IEEE.
- KSP Keywords
- Bragg grating(FBG), Core width, WBG devices, Waveguide Bragg grating(WBG), design principles, effective index, group delay, numerical and experimental