Why are some devices specified with dark current and some with shunt resistance ?
Shunt resistance is basically the dark current when measured with a -10 mV applied reverse bias. This is the slope of the photodiode I-V curve at -10 mV. The -10 mV is chosen since theoretically there should be no dark current at 0V. Since there is no bias applied to the photodiode in PV mode, dark current is specified in the form of Shunt Resistance. As a bias is applied, PC mode, the term dark current is used.
