Abstract
When used for trace-gas detection, laser absorption spectroscopy is usually limited by false absorption signals that are traceable to interferometric effects induced by windows and other pairs of optical surfaces. Here we introduce a new technique that can selectively reject these 6talon fringes while preserving the true absorption signal over a wide range of 6talon free spectral range to absorption linewidth ratios. We present a theoretical analysis and experimental verification by using a tunable lead salt diode laser.
Original language | English |
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Pages (from-to) | 4998-5002 |
Number of pages | 5 |
Journal | Applied Optics |
Volume | 31 |
Issue number | 24 |
DOIs | |
State | Published - 20 Aug 1992 |
Keywords
- Laser absorption spectroscopy
- Optical fringe rejection
- Tunable diode laser