On the eom path, made the laser linear using HWP and QWP (±0.01º). This was measured using polcam. The polcam was then removed. The power after this stage was 1.44mW.

Then aligned PD on the transmission path.

Then added polarizer infront of PD and the setup was configured to be in cross polarization configuration.

The characterization will be done using PD because the polcam can't see kHz modulation.

The test is being done to check how much modulation can be provided by the circuit.