8 line TUNABLE argon

[Sigurthr]

I still find it oddly humorous how this was received by you guys like a closely guarded secret on how to separate wavelengths. I feel like Prometheus handing over fire, lol.

 

[Speedy78]

I just never thought about the slit. I alzo figured they would be too close together at such a close distance but it seemed to work fine.

 

[bloompyle]

I tried before with my HeNe, I just couldn't perfect it without the razors.

 

[vk2fro]

Nice new toy bloom - I'm jealous - go away on holidays, and come back and find yet another member has a new gas laser - and tuneable too!

Sig, I'll try the slit method once I get my argon - prolly mount it all on a baseplate I can get from a local metal suppliers, a couple of micro mounts, and find something I can use for the diffraction grating's stage

 

[norbyx]

I would love to see a picture or video of the laser and how it tunes ...

 

[Wolfman29]

Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\

 

[bloompyle]

I can snap some after work.

 

[Sigurthr]

Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\

It depends on the lines/mm but a diffraction mirror will not have a 0 order unsplit beam so you get the most in each separated line.

I *think* a 3000line/mm grating will produce only a single order. I may be wrong, it has been many years since I've seen high grade gratings in person.

 

[Wolfman29]

Sig? This image seems to suggest that there are 0th order beams? It's from ThorLabs.

 

[Sigurthr]

No idea then. I've seen one used in person years ago, there was no mixed beam visible but perhaps it was occluded somehow before exiting the aperture.

 

[Speedy78]

Not sure if this answers your question or not bu my 1800 line mirror produces 2 full 6 line sets and one mixed split off in between them.

 

[Cyparagon]

Sig, I just had never thought of it!

My question is, do glass reflecting gratings produce only first order dots? Because otherwise there would be power loss :\

There's a LOT of power loss anyway. Most of the beam isn't diffracted at all, and you'd be lucky to get much more than 15% in a single first order.

 

[Wolfman29]

That's a shame. Then there is no way to split a beam without a huge amount of power loss, I take it? I was thinking may prism... but not sure.

 

[bloompyle]

A series of prisms is the only thing that comes to mind.

 

[Wolfman29]

I was thinking about that....

 

[bloompyle]

A diffraction mirror perhaps.