A COMPACT IODINE-STABILIZED HENE LASER AND CROSSOVER RESONANCES AT 543 NM

We have constructed a compact iodine-stabilized 543 nm HeNe laser usin g the third-harmonic locking technique. From the signal-to-noise ratio , the noise-limited-stability would be better than 1 X 10(-12) for int egration time >1 s. Moreover, several crossover resonances of R(12) 26 -0 line are investigated and identified. Two crossover resonances are found adjacent to the hyperfine component a(9), the recommended wavele ngth standard, instead, we suggest the hyperfine component b(10) of R( 106) 28-0 line as the wavelength standard for the absence of neighbori ng main lines or crossover resonances. (C) 1998 Elsevier Science B.V. All rights reserved.