Abstract
The refractive index sensor with single mode-multimode-single (SMS) mode structure based on multimode interference effect usually needs cladding corrosion to improve the sensitivity, and it is vulnerable to the influence of temperature. To solve these problems, a novel fiber refractometer based on fiber core diameter mismatch multimode interference is proposed. The refractometer structured of single-mode fiber/dispersion compensation fiber/single-mode fiber (SMF-DCF-SMF) and a fiber Bragg grating (FBG) has a total length less than 100 mm. The experiment results show that the sensitivity of the sensor in measuring liquid with a refractive index of 1.33~1.39 is 232.8 nm, and the FBG has a good function of temperature calibration.
| Original language | English |
|---|---|
| Article number | 0205001 |
| Journal | Zhongguo Jiguang/Chinese Journal of Lasers |
| Volume | 39 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2012 |
| Externally published | Yes |
Keywords
- Dispersion compensation fiber
- Fiber optics
- Fiber sensor
- Refractive index sensor
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