Title :
International comparison of 127I2-stabilized He-Ne Lasers at λ≈633 nm using the third and the fifth harmonic locking technique
Author :
Balling, P. ; Blabla, J. ; Chartier, A. ; Chartier, J.-M. ; Ziegler, M.
Author_Institution :
CMI, Praha, Czech Republic
fDate :
4/1/1995 12:00:00 AM
Abstract :
In an international comparison of 127I2-stabilized helium-neon lasers at λ≈633 nm, lasers from the CMI and the BIPM were stabilized by the third (THT) and the fifth (FHT) harmonic locking techniques. A frequency shift to the blue was measured when using the FHT technique. The influence of weak components of the rotational-vibrational transition P(33) 6-3 of the molecule 127I129I on the frequency shift of components d, e, f, and g of the line R(127) 11-5 is evaluated
Keywords :
computerised instrumentation; frequency measurement; gas lasers; helium; hyperfine structure; iodine; laser frequency stability; measurement standards; molecular electronic states; neon; physical instrumentation control; rotational-vibrational states; spectral line shift; 633 nm; 127I2-stabilized He-Ne Lasers; BIPM; CMI; He-Ne-I2; fifth harmonic locking; frequency shift; harmonic locking techniques; international comparison; matrix comparison; modulation amplitude effects; rotational-vibrational transition; third harmonic locking; Amplitude modulation; Frequency measurement; Harmonic distortion; Laser noise; Laser stability; Laser transitions; Metrology; Programmable logic arrays; Reproducibility of results; Temperature;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
