Investigation of reproducibility of emission wavelength of heliumneon laser with external neon absorption cell (0.63 micrometers)
Abstract
A stabilized LG1491 heliumneon laser with an external neon cell in a longitudinal magnetic field is investigated and found to provide wavelength reproducibility of 10 million, rather than the limiting values of 10 to the 8th power to 10 to the 9th power, due to shifts in the emission frequency. Frequency reproducibility is measured by a method utilizing a matrix of the frequency intervals formed by the published spread in the electrical parameters of the laser. The matrix provides a graphic representation of how changes in particular parameters influence shifts in frequency, and makes it possible to estimate the bestcase situation. In the worse case, the frequency is combined, i.e., the reproducibility is determined by the sum of the diagonal elements of the matrix. Recommendations are given for ways of providing instrumentoinstrument wavelength reproducibility of one to 10 the 8th power.
 Publication:

USSR Rept Phys Math JPRS UPM
 Pub Date:
 June 1985
 Bibcode:
 1985RpPhM.......25P
 Keywords:

 Emission Spectra;
 HeliumNeon Lasers;
 Magnetic Fields;
 Wavelengths;
 Frequency Shift;
 Recommendations;
 Stability;
 Lasers and Masers