Abstract
A near infrared spectrometer based on the self-scanning Tm-doped fiber laser is developed. The spectrometer is applied to measurements of the water nuclear spin isomer abundances using water absorption lines in the vibrational band ν 2+ν3 near 1.91 µm. The ortho/para ratio of water nuclear spin isomers is measured to be equal to 3.06 ± 0.02, which is close to the theoretical prediction of 3 at room temperature.
Original language | English |
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Article number | 065702 |
Number of pages | 6 |
Journal | Laser Physics Letters |
Volume | 17 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Jun 2020 |
Keywords
- nuclear spin isomers of water molecules
- ortho/para ratio
- Tm-doped fber laser
- CONVERSION DYNAMICS
- Tm-doped fiber laser
- ortho
- para ratio
- SEPARATION