TRACEABILITY OF 633 nm LASER CALIBRATION AT NIMT |
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| Monludee Ranusawud, Ketsaya Vacharanukul, Anusorn Tonmueanwai |
- Abstract:
- The National Institute of Metrology (Thailand), NIMT, maintains the standard of length in accordance with the definition of the meter through a 633 nm iodine stabilized He-Ne laser. Its accuracy is transferred to stabilized and non-stabilized lasers regarding to beat-frequency method and direct measurement using a wavelength meter, respectively. The traceability in wavelength measurement at the NIMT is discussed here. The iodine stabilized He-Ne laser is self-calibrated using the master and slave beat frequency system. NIMT participated in APMP.L-K11 intercomparison and the results are presented. The standard uncertainty is 2.5 × 10-11.
- Keywords:
- iodine stabilized He-Ne laser, beat frequency method, traceability
- Download:
- IMEKO-WC-2009-TC8-158.pdf
- DOI:
- -
- Event details
- Event name:
- XIX IMEKO World Congress
- Title:
Fundamental and Applied Metrology
- Place:
- Lisbon, PORTUGAL
- Time:
- 06 September 2009 - 11 September 2009