Re: IS IT A LASER?

From: Louis Boyd (boyd_at_apt0.sao.arizona.edu)
Date: 10/17/04 

Date: Sun, 17 Oct 2004 07:47:25 -0700

Haisheng wrote:
> My question is very basic:
>
> How can you tell for sure whether a light source is a laser or not?
> You can measure whatever you want, but not touch the source.
>
> Thanks,
>
> Haisheng

If you measure the power dissipation of the source compared to the ouput
power and bandwidth of the emitted light you may be able to conclude
that the source is a laser because filtering with any other known source
could not give the required efficiency. If the source has sufficiently
low efficiency you may not be able to make the determination with certainty.

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