Keithley 2517 Photodetectors free download

File name 2517 Photodetectors.pdf

A G R E AT E R M E A S U R E O F C O N F I D E N C E built-in potential or equilibrium potential) across an area called the depletion region (or layer). Reverse biasing the photodiode causes this potential to increase, and the depletion region to expand. Photons of sufficient en- ergy impinging on this region will create electron-hole pairs, which will separate due to the combined equilibrium potential and externally applied reverse bias. These charg- es will quickly drift away from the junction and be collected by the electrodes. Drift cur- Photodetectors--Choose rent generated by photon absorption in the depletion region is the main component of and Use Wisely for Best photocurrent. It also is the component with the fastest response time. Another component of photocurrent is Results in Pulsed Laser called diffusion current. This component originates from charge carriers created by absorption of photons outside the depletion Diode Test Systems layer. While the majority of these charge