Proceedings of SPIE - the International Society for Optical Engineering
We showed that the output of an autocorrelation with a gas spectrum could be triple-correlated to reduce the effects of Gaussian noise. Such processing is directly applicable to a correlation spectrometer but could be applied to other designs. In spite of the added processing, triple-correlating the output of a spectrometer allowed us to generally increase the SNR by over a factor of ten. Even with as few as two measurements good results were obtained.
Kozaitis, S. P., & Bradshaw, B. J. (1995). Nondispersive triple-correlation spectrometer for trace gas analysis. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, , 2478 282-291.