Ia. Khrebtov et al., Study of the active electrothermal negative-feedback regime for a high-temperature superconductor bolometer, J OPT TECH, 68(4), 2001, pp. 290-293
This paper presents comparative studies of the operation of a high-temperat
ure superconductor bolometer in two regimes-conventional and with active el
ectrothermal negative feedback. It is shown experimentally that the bolomet
er's response rate can be improved by more than an order of magnitude in th
e latter regime. The effect of the regime on the noise characteristics of t
he device is studied. For the specific layout presented here, an estimate u
sing the parameter D*/tau (1/2) shows that the regime with active electroth
ermal negative feedback has an advantage if high response rate is required
in the bolometer. (C) 2001 The Optical Society of America.