14 June 2004 Spectral engineering of lithographically scribed channel waveguide gratings
Author Affiliations +
Abstract
We propose and demonstrate a powerful new approach to spectral bandpass engineering (apodization) of one-dimensional channel-waveguide Bragg reflectors. Bandpass engineering is accomplished via precise photolithographic control over the transverse width and longitudinal placement of individual grating lines which, respectively, provide unique line-by-line diffractive amplitude and phase control. Several channel waveguide gratings exhibiting complex filtering functions based on the present apodization method have been fabricated and modeled. They include an essentially polarization -insensitive 4-nm wide flat-top filter with steep roll-off and a multi-passband spectral decoder, useful, e.g., for optical spectral code-division multiplexing or spectral signature recognition. When a second-order apodization effect, comprising effective waveguide refractive index variation with grating-line transverse width, is included in the simulation, extraordinary agreement between predicted and observed spectral passband profiles is obtained.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christoph Greiner, Dmitri Iazikov, Thomas W. Mossberg, "Spectral engineering of lithographically scribed channel waveguide gratings", Proc. SPIE 5350, Optical Components and Materials, (14 June 2004); doi: 10.1117/12.529585; https://doi.org/10.1117/12.529585
PROCEEDINGS
6 PAGES


SHARE
RELATED CONTENT

Fiber facet gratings for high power fiber lasers
Proceedings of SPIE (December 01 2017)
Optimal design of waveguiding periodic structures
Proceedings of SPIE (April 03 2003)
Resonant grating filter with low out-of-band reflectance
Proceedings of SPIE (August 27 1999)
Resonant grating filters at oblique incidence
Proceedings of SPIE (November 03 2003)
Optical elements with subwavelength structured surfaces
Proceedings of SPIE (October 08 2004)

Back to Top