Sensors Based on Thin-Film Coated Cladding Removed Multimode Optical Fiber and Single-Mode Multimode Single-Mode Fiber: A Comparative Study

Two simple optical fibre structures that do not require the inscription of a grating, a cladding removed multimode optical fibre (CRMOF) and a single-mode multimode single-mode structure (SMS), are compared in terms of their adequateness for sensing once they are coated with thin-films. The thin-film deposited (TiO2/PSS) permits increasing the sensitivity to surrounding medium refractive index. The results obtained can be extrapolated to other fields such as biological or chemical sensing just by replacing the thin-film by a specific material.

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Coupling from a single mode fiber to a III—V thin-film waveguide via monolithic integration of a polymeric optical waveguide

Journal of the Franklin Institute ◽

10.1016/s0016-0032(97)00117-8 ◽

1998 ◽

Vol 335 (1) ◽

pp. 89-96

Author(s):

B.-H.V. Borges ◽

P.R. Herczfeld

Keyword(s):

Thin Film ◽

Optical Waveguide ◽

Single Mode ◽

Single Mode Fiber ◽

Monolithic Integration

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Coupling single-mode fiber to uniform and symmetrically tapered thin-film waveguide structures using gadolinium gallium garnet

Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference ◽

10.1109/sbmomo.1995.509739 ◽

2002 ◽

Author(s):

J. Gadi ◽

R. Yalamanchili ◽

M. Shahid

Keyword(s):

Thin Film ◽

Single Mode ◽

Single Mode Fiber ◽

Gadolinium Gallium Garnet

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An Optical Fiber Fabry–Perot Pressure Sensor with Optimized Thin Microbubble Film Shaping for Sensitivity Enhancement

Coatings ◽

10.3390/coatings10040358 ◽

2020 ◽

Vol 10 (4) ◽

pp. 358 ◽

Cited By ~ 1

Author(s):

Shubin Zhang ◽

Zhenjun Shao ◽

Jinrong Liu ◽

Meixue Zong ◽

Jian Shen ◽

...

Keyword(s):

Thin Film ◽

Arc Discharge ◽

Structural Parameters ◽

Silicon Film ◽

Glass Tube ◽

High Sensitivity ◽

Single Mode ◽

Single Mode Fiber ◽

Fabry Perot ◽

Micrometer Scale

A pressure-assisted arc discharge method of preparing silicon microbubbles with a glass tube was utilized for decreasing the bubble film’s thickness and improving the bubble’s uniformity. By controlling the arc discharge intensity, discharge time and the position of the fiber carefully, the thickness of the microbubble film was reduced to the micrometer scale. Later, the thin film of the microbubble was transferred to the end the single-mode-fiber/glass-tube structure, for forming the FP (Fabry–Perot) interference cavity. As the thin film is sensitive to the outer pressure, such a configuration could be used for a high-sensitive-pressure measurement. Experimental results show that the sensitivity of this FP (Fabry–Perot) cavity was 6790 pm/MPa when the outer pressure ranges from 100 to 1600 kPa, and the relationship between the structural parameters of the thin film and the outer pressure was theoretically analyzed. Moreover, this special structure made of the end silicon film microbubble is more suitable for high-sensitivity applications.

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