Bent waveguides are superimposed on homogeneous distributed feedback (DFB) grating fields to generate chirped DFB gratings. This efficient and high-resolution method enables the fabrication of arbitrarily axially chirped DFB gratings by appropriately bent waveguides which reveal differences between neighboring effective DFB pitches in the sub-interatomic range. The bending functions are generated by high-resolution lithography on a set of masks which can be frequently reused for a low-cost production process. The design principles are described defining specific unit cells which are reproduced as often as necessary to obtain a full coverage of the wafer. The method is demonstrated for semiconductor lasers including DFB gratings.
Chirped DFB gratings using bent waveguides to tailor specific laser properties
Fifth International Conference on Industrial Lasers and Laser Applications '95 ; 1995 ; Shatura,Moscow,Russia
Proc. SPIE ; 2713
1996-03-01
Conference paper
Electronic Resource
English
Chirped DFB gratings using bent waveguides to tailor specific laser properties [2713-21]
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