TRACEABILITY OF 633 nm LASER CALIBRATION AT NIMT
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<sup>-11</sup>.
Event details
- Event
- XIX IMEKO World Congress
- Place
- Lisbon, PORTUGAL
- Time
- 6 September 2009 - 11 September 2009
- Website
- http://www.imeko2009.it.pt/