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Updated: May 26, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

A transflective nano-wire grid polarizer based fiber-optic sensor.

Jing Feng¹, Yun Zhao, Xiao-Wen Lin

¹College of Engineering and Applied Sciences and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China. feng.jing.nju@gmail.com

Sensors (Basel, Switzerland)

|December 14, 2011

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A novel fiber optic polarizer using nano-wire grids reflects TE-mode light and transmits TM-mode light, enabling robust sensing applications. This technology offers simultaneous monitoring of transmitted and reflected light, enhancing sensor capabilities.

Area of Science:

Optoelectronics
Fiber Optics
Nanotechnology

Background:

Conventional in-line polarizers often discard light power.
There is a need for robust fiber optic sensors that can withstand power variations.

Purpose of the Study:

To fabricate a transflective nano-wire grid polarizer on a single mode fiber tip.
To develop a robust fiber optic sensor with enhanced monitoring capabilities.

Main Methods:

Focused ion beam machining was used to create the nano-wire grid polarizer.
The polarizer reflects TE-mode and transmits TM-mode light.
An optic circulator enabled simultaneous monitoring of transmissive and reflective light.

Main Results:

Keywords:

fiber optics sensors polarization-selective devices pressure measurement subwavelength structures

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A 200-nm wire grid fiber polarizer achieved 13.7 dB reflection contrast and 4.9 dB transmission contrast at 1,550 nm.

A fiber pressure sensor demonstrated a sensitivity of 0.24 rad/N.

The stress-optic coefficient of the fiber was measured.

Conclusions:

The developed transflective nano-wire grid polarizer is suitable for robust fiber optic sensing.
This technology can be applied to detect polarization changes induced by various external factors.