16 February 2011 Small-volume cavity cell using hollow optical fiber for Raman scattering-based gas detection
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Abstract
The highly sensitive Raman cell based on the hollow optical fiber that is suitable for the real-time breath analysis is reported. Hollow optical fiber with inner coating of silver is used as a gas cell and a Stokes light collector. A very small cell whose volume is only 0.4 ml or less enables fast response and real-time measurement of trace gases. To increase the sensitivity the cell is arranged in a cavity which includes of a long-pass filter and a high reflective mirror. The sensitivity of the cavity cell is more than two times higher than that of the cell without cavity.
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Y. Okita, Y. Okita, T. Katagiri, T. Katagiri, Y. Matsuura, Y. Matsuura, } "Small-volume cavity cell using hollow optical fiber for Raman scattering-based gas detection", Proc. SPIE 7894, Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI, 78940N (16 February 2011); doi: 10.1117/12.874828; https://doi.org/10.1117/12.874828
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