We have constructed two types of high‐temperature superconducting (HTSC) bolometers, whose performance is essentiallywavelengthindependentfrom &lgr;∼0.6 to 450 &mgr;m: The first is a microbridge, of dimensions 20×20 &mgr;m, and the second is a meander, covering a region of ∼1 mm2. Both were fabricated by photolithography of a superconducting YBaCuO thin film on SrTiO3. The bolometers are current biased, and the ac voltage induced by the chopped radiation is measured using lock‐in detection. Operating optimally in the vicinity of the transition temperature (90 K), the first bolometer shows responsivityS∼1 mV/(W/cm2), while the second givesS∼800 V/W. The response of the first bolometer for various chopping frequencies is basicallyS∼1/&sqrt;f, which makes it usable at frequencies up to ≥50 kHz, while the second bolometer has a chopping‐frequency response that is basicallyS∼1/f, with a cutoff frequency near 0.01 Hz.