First attempts on laser chip decapsulation

Описание: https://zeptobars.com/en/read/laser-d...
First experiments (few of many attempts). MOPA fiber laser, 15-30W power. Trying to find minimum pulse energy while still eating through plastic. I am trying to find process window where plastic is gone, but chips is not yet damaged.

Unfortunately, it seems it is impossible to do that easy for glass-filled plastic. Let me know if you know how to make it better.