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The results of experimental and theoretical investigations of the noise properties of high-Ta superconducting films and bolometers are reported. YBaCuO and GdBaCuO films produced by magnetron and laser deposition on various substrates (SrTiO, NdGaO3, A1203, MgO, YSZ, LaA1O3, CaGdAlO4, Si/YSZ) were studied. The effect of various noise components on the noise equivalent power (NEP) of different bolometers is considered. Structural, noise and critical current properties were investigated. Using the laser ablation YBaCuO films with very low noise Hooge's parameter close to 2. i04 was obtained. Experimental data are discussed on basis of the modern excess low frequency 1/fmodels. Besides, the noise measurements of antenna YBaCuO nücrobolometers on NdGaO3 substrate and GdBaCuO bolometers on Si-membrane are reported. The NEP = 1.21O' W1Hz112 at response time of 0.3 ts for microbolometer and D* 3.8•1O cmHz"2W1 at response time of 0.45 ms for bolometer on Si-membrane were reached. NEP of the bolometers is limited by only the phonon noise.

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