Frequency conversion in novel materials and its application to high resolution gas sensing

Ady Arie*, Keren Fradkin-Kashi, Yonatan Shreberk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We have constructed a compact room-temperature mid-infrared spectrometer and gas sensor, based on quasi-phase matched difference-frequency generation in periodically poled ferroelectric crystals of the KTiOPO4 family, namely: KTiOPO4, KTiOAsO4 and RbTiOAsO4. The wide tunabilty of the spectrometer (3.1-3.75 μm) enables us to cover an entire vibrational band of gases such as methane and nitrous oxide. The high spectral resolution (∼ 1 MHz) is used to investigate the spectral profile of the hyperfine components of a single rotational transition. The sensitivity of the described spectrometer is ∼ 75 parts per million. Applications of this technology include the detection of polluting or toxic gases, biomedical sensing, atmospheric research, volcanic monitoring and industrial process control.

Original languageEnglish
Pages (from-to)159-170
Number of pages12
JournalOptics and Lasers in Engineering
Volume37
Issue number2-3
DOIs
StatePublished - Feb 2002

Keywords

  • Laser
  • Optical sensor

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