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Optical fiber Bragg grating sensors have found potential applications in many fields, but the lack of a simple, field deployable and low cost interrogation system is hindering their deployment. To tackle this, we have developed a micro optical sensor interrogator using a monolithically integrated planar lightwave circuit based echelle diffractive grating demultiplexer and a detector array. The design...
1-to-8 and 1-to-4 optical waveguide power splitters were fabricated using the focused 800nm-amplified femtosecond laser to directly write a series of 1-to-2 Y-junction splitters in a fused silica glass sample. A shifted multi-scan technique was developed to substantially reduce the excessive insertion loss of the involved Y junctions and the polarization dependent loss of such integrated splitters...
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