Abstract
A configuration based on a parallel double Fabry-Perot interferometers (FPIs) is proposed and experimentally demonstrated to enhance the temperature sensitivity by Vernier-effect. Two separated FPIs constructed by suspended-core microstructured optical fiber (SCMF) are connected by a 3-dB coupler to form a parallel structure. FPI-2 is used for temperature sensing, while FPI-1 as a reference. With the temperature increasing from 40 °C to 220 °C, both the fine interference fringes and envelope have a linear redshift. This parallel double-FPIs configuration shows an enhanced temperature sensitivity of 153.8 pm/°C with an amplification factor {M} =14.6. Moreover, since the free reference FPI-1 is away from the temperature sensing environment, this simple and novel parallel double-FPIs configuration provides good reversibility and stability during the heating and cooling processes.
| Original language | English |
|---|---|
| Article number | 8851200 |
| Pages (from-to) | 1905-1908 |
| Number of pages | 4 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 31 |
| Issue number | 24 |
| DOIs | |
| State | Published - 15 Dec 2019 |
Keywords
- Vernier-effect
- parallel structure
- suspended-core microstructured optical fiber
- temperature sensing
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