Abstract
We report on interferometric noise limitation of fiber-optic gas sensors with highly coherent lasers and wavelength modulation spectroscopy. Interference between signal wave and reflected waves causes signal fluctuation in the output, which limits the performance of the sensing system. Sensor resolution limited by interferometric noise is calculated for a fiber-optic gas sensor with the Q(6) absorption line of methane gas at approximately 1650 nm. The results are useful for system designers of this particular type of gas sensor.
| Original language | English |
|---|---|
| Pages (from-to) | 7239-7246 |
| Number of pages | 8 |
| Journal | Applied Optics |
| Volume | 36 |
| Issue number | 28 |
| DOIs | |
| Publication status | Published - 1 Oct 1997 |
Keywords
- Fiber-optic sensors
- Gas sensors
- Interferometric noise
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics