Which kind of signal processing are you assuming? Is the laser for optical communications or 3D scanning or something else? It may depend on the kind of application.

Dear Changyo Han

Thanks for your feedback, for optical communications.

Greetings.

1.What are the distances for optical communications are considered: 0.0001m ..., 0.1m ..., 100m ..., 10km ..., 10000km?

2.Agree with Changyo Han ... "It may depend on the kind of application" ....

Dear Nick Proskurin

Thanks for your answer, for short distance as it is used for photonic devices for short distance purpose.