4.5 Article

Micro-Tapered Fiber Few-Mode Interferometers Incorporated by Molecule Self-Assembly Fiber Grating for Temperature Sensing Applications

Journal

PHOTONICS
Volume 9, Issue 2, Pages -

Publisher

MDPI
DOI: 10.3390/photonics9020096

Keywords

molecule self-assembly; few-mode interferometer; tapered fiber; fiber grating; charged nano-particles

Categories

Funding

  1. National Natural Science Foundation of China [61875247]
  2. Liaocheng University [31805180101, 319190301]

Ask authors/readers for more resources

By utilizing charged nanoparticles to create a self-assembly surface corrugated grating and an external assisted grating, fiber few-mode interferometers were successfully made for the production of fiber temperature sensors. A maximum resonant wavelength shift of 4.6 nm was achieved over a temperature range from 20-60 degrees C, with a temperature sensitivity of 112.6 pm/degrees C, demonstrating high linearity in the results.
We demonstrate fiber few-mode interferometers based on a self-assembly surface corrugated grating using charged nano-particles. Initially, an abrupt taper (AT) was first created using a micro flame. The AT was then further outwardly stretched to make an elongated uniformed taper until the tapered diameter achieved a micron scale. The high order core modes (HOCMs) were excited at the AT and the optical path difference (OPD) among the modes was enlarged through the uniformed taper to achieve the few-mode interference effects seen. However, to significantly enhance the interference effects with higher extinction ratios (ER) over such a short length of interferometer, an external assisted grating was made using charged nanoparticles to form surface corrugated grating with a period, ?, of approximately 14 mu m. This intermediate period of the fiber grating was helpful in scattering and attenuating some unwanted high-order modes to change the optical characteristics of the few-mode interferometer (FMI). This FMI with a self-assembly fiber grating (SAFG) was further used to make fiber temperature sensors, with a maximum resonant wavelength shift of 4.6 nm, over a temperature range from 20-60 degrees C. The temperature sensitivity achieved was 112.6 pm/degrees C and the coefficient of determination, R-2, was as high as 0.99, which revealed the high linearity of the results.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.5
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available