Analyses on propagation and imaging properties of GRIN lenses

Li, Xuejin; Yao, Jianquan; Zhang, Baigang

doi:10.1117/12.470958

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2017

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“…The transmitting and receiving fiber probes were made by fusion splicing Newport F-SF single mode fibers with Thorlabs graded index GIF-625 fibers using a Sumitomo Type 36 fiber splicer. The graded index fiber was then trimmed to ¼ pitch (246.5 μm length) to act as a focusing and collection lens [ 17 ]. The light source used was a 4 mW Newport 633 nm He-Ne laser.…”

Section: Resultsmentioning

confidence: 99%

An Optical-Fiber-Based Airborne Particle Sensor

Wang

Muth

2017

Sensors

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A new optical-fiber-based airborne particle counter is reported. Unlike traditional light-scatter-based techniques, the particle is detected through the drop in optical fiber coupling efficiency as the particle disrupts the electromagnetic mode of the optical beam. The system is simple, substantially smaller than traditional systems, and does not require high power laser input. This makes it attractive for wearable air quality monitors where size is a premium. There is close agreement between theoretical model and experimental results for solid and liquid particles in the 1 to 10 µm range.

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Section: Resultsmentioning

confidence: 99%