A light guide member for guiding light received from a light source, the light source illuminating light toward the light guide member, the light guide member may include a plurality of first grooves on a first side of the light guide member, the first grooves extending along a first direction crossing a zero-degree radiation angle of the light from the light source, wherein an angle of a reflective face of the first groove increases approaching away from the light source of the light source.

 
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> Multi-core strain compensated optical fiber temperature sensor

> Transmitter photonic integrated circuits (TXPICS) with directly modulated lasers and wavelength selective combiners

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