Overview: Testing the output of MOD-IN mode of KLC

 

Details:

 

We provided different voltages as the input to KLC and observed the output. It seems that the output in MOD-IN mode is highly inconsistent.

 

There are a lot of problems like,

1. It does not reach 25V all the time. Sometimes the maximum voltage is around 17V even if 5V is provided as input. 

2. It stops giving any output after some time. It behaves as if it's ON but is receiving 0V as input. 

3. The data resolution was changed by 1mV at the input. Despite this, the data resolution at the output was not so good (see Fig 1). 

4. Even switching frequency between 500-2500 Hz didn't give any improvements. 

5. Although I did the measurements after the warm-up time it didn't resolve any issues. 

 

Fig 1 will help better understand the above issues. Although Thorlabs recommended using this, it seems we need to further investigate how to properly utilize it.