Heterodyne architecture for tunable laser chirped dispersion spectroscopy using optical processing Articles uri icon

publication date

  • April 2014

start page

  • 2611

end page

  • 2613


  • 9


  • 39

International Standard Serial Number (ISSN)

  • 0146-9592

Electronic International Standard Serial Number (EISSN)

  • 1539-4794


  • 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