Abstract
The wavelength resolution of the linear CCD array based on micro-spectrometer is improved to 1pm by u-sing a novel wavelength discrimination algorithm. To interrogate the wavelength of a resonance peak, the position of the peak in the optical spectrum is obtained firstly, and the wavelengths of adjacent two pixels are subdivided. This calculation speed is faster than that by using the interpolation algorithm, and the wavelength resolution and sampling frequency are increased effectively. Experiment results show that the wavelength stability for the measurement of fiber Bragg grating (FBG) is better than 1pm, and for fiber extrinsic Fabry-Perot interferometer (EFPI) is 5 pm.
| Original language | English |
|---|---|
| Pages (from-to) | 180-183 |
| Number of pages | 4 |
| Journal | Guangxue Jishu/Optical Technique |
| Volume | 39 |
| Issue number | 2 |
| Publication status | Published - Mar 2013 |
Keywords
- Micro-spectrometer
- Optical fiber sensor
- Resolution
- Wavelength measurement