Frequency conversion in novel materials and its application to high resolution gas sensing |
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| Authors: | Ady Arie Keren Fradkin-Kashi Yonatan Shreberk |
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| Affiliation: | 1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;2. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China |
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| 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. |
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| Keywords: | Optical sensor Laser |
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