Temperature correction of the spectral response of a photodiode

A method for compensating the temperature instability of the photodiode res ponse is tested. The method is based on the simultaneous measurement of the photocurrent and temperature of the photodiode. A subsequent digital corre ction reduces the temperature fluctuations of the photocurrent down to the intrinsic noise level. This method, in contrast to the traditional active t hermostabilization method, excludes heating of the photodiode and provides an order of magnitude smaller threshold of detectability. Experimental resu lts for a Phi Pi YK-10 photodiode are presented; the temperature coefficien ts of the photodiode's spectral response are determined for several wavelen gths.