Title :
Control of Linear Chirps in Waveguide Bragg Gratings by Applying Designed Core Profiles
Author :
Kim, Min-su ; Ju, Jung Jin ; Park, Seung Koo ; Shim, Jae Yeob ; Lee, Myung-Hyun
Author_Institution :
Convergence Components & Mater. Res. Lab., Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
Chirped gratings can be readily implemented in uniform-period waveguide Bragg gratings (WBGs) by adopting a tapered profile in the core patterning process. Based on our analysis, we have demonstrated that controlled linear chirps can be generated in WBGs with specifically designed core-taper profiles. By virtue of our established design and fabrication techniques, the measured center wavelengths, bandwidths, and dispersion coefficients of our fabricated straight and tapered polymeric WBGs agree very well with the designed values. We also obtained fairly low polarization-dependent wavelength shifts from the straight WBGs owing to the adopted low-birefringence polymeric materials.
Keywords :
Bragg gratings; birefringence; chirp modulation; optical design techniques; optical dispersion; optical fabrication; optical polymers; optical waveguides; center wavelength; core patterning process; design technique; fabrication technique; linear chirp control; low polarization-dependent wavelength shift; low-birefringence polymeric material; tapered polymeric WBG; waveguide Bragg grating; Bragg gratings; Chirp; Fabrication; Lithography; Optical fiber dispersion; Optical fiber polarization; Optical waveguides; Polymers; Resists; Wavelength measurement; Bragg gratings; core-taper profiles; dispersion; linear chirps;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2025706
