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Rapid prototyping of all-polymer AWGs for FBG readout using direct laser lithography

: Pichler, E.; Bethmann, K.; Kelb, C.; Schade, W.


Optics Letters 43 (2018), No.21, pp.5347-5350
ISSN: 0146-9592
Journal Article
Fraunhofer HHI ()

This Letter describes the design, production, and characterization of a
arrayed waveguide grating (AWG) for fiber Bragg grating (FBG) readout, centered at 850 nm, with a channel spacing of 1 nm. The employed manufacturing process is laser direct lithography, a low-cost, rapid-prototyping capable, maskless method that allows for short iteration cycles and simple migration of a successful design to mask-based high throughput methods. We also consider the achievable AWG performance if used for strain or temperature measurements with FBG sensors.