- OPTICS LETTERS Journal
- April 2014
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- Dispersion-based spectroscopic techniques present many desirable features when compared with classical absorption spectroscopy implementations, such as the normalization-free operation and the extended dynamic range. In this Letter, we present a new sensor design based on direct optical processing for heterodyne conversion in tunable laser chirped dispersion spectroscopy that allows sensor implementations using low-speed photodetectors and lowcost FM demodulators. The performance of the new setup has been validated using as a target the ro-vibrational transition of methane at approximately 1650.96 nm.
- optical processing; optical sensing; optical sensors; spectroscopy; diodelasers; heterodyning; laser tuning; lasers; methane; desirable features; extended dynamic ranges; heterodyne architecture; optical processing; sensor designs; sensor implementation; spectroscopic technique; dispersions