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I have a chip containing diode lasers integrated with photodetectors. The lasers and photodetectors share the same n-contact, so essentially it is a three-terminal circuit (one laser p-contact, one shared n-contact [i.e. common ground] and one photodetector p-contact). I need to forward bias the laser for lasing and reverse bias the photodetector for on-chip photocurrent measurement. Can I use a dual-channel 2400 sourcemeter to forward bias laser (i.e., +V on p, ground on shared n) with one channel and reverse bias the photodetector (i.e., -V on p, ground on shared n) with the other channel? If not, any solutions without isolating the lasers and photodetectors?
Thanks a lot.
- Keithley Applications
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