Abstract
200 mV photovoltaic voltage pulses reported [C. L. Chang, A. Kleinhammes, W. G. Moulton, and L. R. Testardi Phys. Rev. B (in press)] for YBa2Cu3O7 illuminated with 2–30 mJ/cm2 at 532 nm are interpreted in terms of the complete theory of photovoltaic responses, including off‐diagonal terms not recognized in the original theory. The resulting predictions are in reasonable quantitative agreement with experiment.