A precise real-time wavemeter
A wavemeter has been built utilizing a coincidence start/stop fringe counting technique with a standard, simple division-of-amplitude type interferometer. We utilize a microprocessor to control the counting and to calculate and display, in real time, the unknown wavelength and to indicate when the result is outside of a preset tolerance (e.g. mode hop). This system, utilizing the coincidence technique, gives an enhancement in the precision of at least a factor of 15 over standard fringe counting techniques. © 1982.
Publication Source (Journal or Book title)
Nuclear Instruments and Methods In Physics Research
Carter, H., Bingham, C., Pegg, D., Gaillard, M., Zganjar, E., & Griffin, P. (1982). A precise real-time wavemeter. Nuclear Instruments and Methods In Physics Research, 202 (1-2), 361-364. https://doi.org/10.1016/0167-5087(82)90420-3