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Optics & Photonics Talk

Using Laser class IIIb as class 1 or 1M
Misagh Heidari Langa
hello

I'm doing a project for my master study in electrical engineering.
My Project is a simple free space optical communication system.

Choosing and applying a laser in free space communication needs to consider safety issues. Most of commercial lasers are in class IIIb and I want to know how I can apply 

it as a class 1 or 1M using a lens.  I was wondering if anyone can help me and give me some advice.

Thanks

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Updated: 17 May 2019
Activated 2019-2020 BoD Election