How to measure the wavelenght from lasers?

[UED]

Hello everyone, my collection of laserpointer is still growing and I would like to measure the exact wavelenght.
How can I do this? I know the guy from Youtube channel Brainiac75 is doing this pretty accurate.
How is he doing this and what hardware tools and software do I need?

Also, can someone tell me a good laser power meter or what Brainiac75 is using?

Best thanks in advance.

 

[Encap]

IF you want to know what Brainac 75 is using, ask him - simple.
Nobody I know of knows or has ever heard of Brainiac 75 - seems he is just a low level YouuTube guy seeking attention for pennies from clicks. Don't be guided by anything he says or does.

You need a spectrometer to measure wavelengths and a laser power meter for determining output power.
Prices, quality, accuracy of the devices vary widely fro marginal to professional units. You get whet you pay for in quality and accuracy.

Use LPF search and search "spectrometer" and "laser power meter". There are literally hundreds of posts about each topic and about different types and makers.