The signal from the PFB:F8BT photosensor at zero bias was amplified by a Keithley 427 current amplifier (gain 107 V/A) and the oscilloscope was triggered using a calibrated silicon photodiode (Newport) from a secondary input channel.
The signal fromthe PFB:F8BT photosensor at zero bias was amplified by aKeithley 427 current amplifier (gain 107 V/A) and the oscilloscopewas triggered using a calibrated silicon photodiode(Newport) from a secondary input channel.