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Proceedings Paper

Silver mirror coated deep seated negative axicon optical fiber tip for highly efficient Bessel-Gauss beam generation
Author(s): Kaushal Vairagi; Aditi Chopra; Pooja Gupta; Umesh Tiwari; Samir K. Mondal
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Paper Abstract

In this work we report sliver mirror coated Deep Seated Negative Axicon (DSNA) optical fiber tip which significantly reduces the output power loss and increases the percentage Bessel-Gauss beam power output as compared to non-coated DSNA. The silver mirror has been deposited on the cladding of a highly Ge doped single mode double clad optical fiber using Tollen’s reagent and Glucose solution. DSNA is fabricated after deposition of the silver mirror. This coated DSNA is compared with a non-coated DSNA for measured output power by coupling with a He-Ne Laser. The measurement shows that after coating 88% of the total output power is contributing to the formation of Bessel-Gauss beam whereas it is just 30% in case of non-coated DSNA. The power in central spot of the Bessel-Gauss beam has also been increased from ~7% to ~12% of the power contributing in Bessel-Gauss beam generation. This silver mirror coated DSNA fiber tip could significantly improve the image contrast, Signal to noise ratio and sensitivity of the DSNA based Common-path optical coherence tomography system.

Paper Details

Date Published: 20 February 2020
PDF: 4 pages
Proc. SPIE 11233, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX, 112331J (20 February 2020); doi: 10.1117/12.2547105
Show Author Affiliations
Kaushal Vairagi, CSIR - Central Scientific Instruments Organisation (India)
Academy of Scientific & Innovative Research (India)
Aditi Chopra, CSIR - Central Scientific Instruments Organisation (India)
Academy of Scientific & Innovative Research (India)
Pooja Gupta, CSIR - Central Scientific Instruments Organisation (India)
Academy of Scientific & Innovative Research (India)
Umesh Tiwari, CSIR - Central Scientific Instruments Organisation (India)
Samir K. Mondal, CSIR - Central Scientific Instruments Organisation (India)


Published in SPIE Proceedings Vol. 11233:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX
Israel Gannot, Editor(s)

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