A Portable Iodine Stabilized Helium-Neon Laser

A newly designed iodine stabilized belium-neon (He-Ne) laser is described wbich is stable to 3 x 10-13 (1000-s sample time) but which exhibits an intensity dependent shift of about 8 kHz/W cm2. Closer agreement between dissimilar asers is attained when the internal power densities are approximately equal.