Spiral planar-waveguide Bragg gratings

C. Lin; E. W. Jacobs; J. S. Rodgers

doi:10.1117/12.808341

9 February 2009 Spiral planar-waveguide Bragg gratings

C. Lin, E. W. Jacobs, J. S. Rodgers

Proceedings Volume 7218, Integrated Optics: Devices, Materials, and Technologies XIII; 72180E (2009) https://doi.org/10.1117/12.808341
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

A photonic integrated circuit is designed containing a long grating with spiral geometry. Waveguide width and index modulation are studied as methods to form the grating structure. Both methods require an initial mask step for waveguide formation. In the case of width modulation the grating is formed in the same step as the waveguide, whereas a second mask step is required for index modulation. Thus width modulation removes the alignment tolerances associated with a two step process. The spiral geometry enables a long grating (~1 m) to be realized in a small area (1 cm²). The ability to form the grating in such a small area enables the use of current lithography mask / projection equipment. Thus, the requirements for mechanical/optical precision in a customized long fiber Bragg grating fabrication system is transferred to the precision of commercial lithography mask fabrication and projection equipment.

Citation Download Citation

C. Lin, E. W. Jacobs, and J. S. Rodgers "Spiral planar-waveguide Bragg gratings", Proc. SPIE 7218, Integrated Optics: Devices, Materials, and Technologies XIII, 72180E (9 February 2009); https://doi.org/10.1117/12.808341

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