High Resolution Saturated Absorption Spectra of Iodine Molecules¹²⁹I₂,¹²⁹I¹²⁷I, and¹²⁷I₂at 633 nm

Abstract

A frequency-offset locked spectrometer has been used to study the saturated absorption spectra of iodine at 633 nm. The results show very high resolution and have a particularly accurate frequency scale. Three absorption lines have been studied in greater de!ail using curve fitting techniques. The laser system is described, including a novel resonant mirror mount.

International comparison of iodine cells for laser length standards

“…The cavity mirrors have radii of curvature of 1350 mm (next to the iodine cell and 100 % reflecting) and 548 mm (the output mirror and 98 % reflecting). The 1350 mm mirror is mounted in a resonant mirror mount which separates the functions of tuning the laser cavity and modulating the cavity length [7]. The modulation frequency is about 30 KHz and the laser output power is 200 W.…”

Long-Term Stability of a Thermally-Stabilized He-Ne Laser

“…The frequency of the laser was then measured by heterodyning the output with the radiation from an a After refilling with He The current was increased to suit the higher pressure. The increased current raised the temperature at which the laser operated without control, and it was necessary to increase the controller setting to keep the original temperature reserve against changes in ambient conditions iodine-stabilized He-Ne laser [3], at two settings of the temperature controller. The results, converted to vacuum wavelengths, are included in Table 1.…”