30 September 1998 Primary wavelength standards for direct measurement of gauge blocks
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A simple stabilizer for locking 543 nm, 612 nm and 633 nm helium-neon lasers to iodine is described. When applied to a 543 nm laser, a long term frequency stability of 1.4 X 10-12 was observed. One stabilizer can lock three lasers simultaneously to iodine references with relative uncertainties better than 2 X 10-10 for sample times greater than 1 s, providing primary frequency references that can be used for gauge block measurements.
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Esa Jaatinen, Esa Jaatinen, Nicholas Brown, Nicholas Brown, } "Primary wavelength standards for direct measurement of gauge blocks", Proc. SPIE 3477, Recent Developments in Optical Gauge Block Metrology, (30 September 1998); doi: 10.1117/12.323112; https://doi.org/10.1117/12.323112

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