Search for narrow-band-noise modulations of the infrared transmission of blue bronze

We have searched for narrow-band-noise (NBN) modulations of the infrared transmission in blue bronze, using tunable diode lasers. No modulations were observed, giving an upper limits for NBN changes in the absorption coefficient of Δα NBN < 0.3 / cm (= α/2000). The implication of these results on proposed CDW properties and NBN mechanisms are discussed.