410nm Laser possible?

[ApoMoFe]

Hi Guys. I work with Iron-Sulfur clusters in proteins and I'm trying to get a hold of a 410nm laser to do some spectroscopy work. The Iron in the compound absorbs at 410nm. I see that there are a lot of 405nm and 435nm available, is 410nm possible to rig?

Cheers

 

[jamilm9]

well you can get 408nm

 

[pullbangdead]

Exactly 410nm light is very possible, but to get exactly 410nm would be a custom-order diode from a diode manufacturer, many thousands of dollars.

What everyone around here uses are the diodes from Blu-Ray and HD-DVD players, which are typically rated as "405 +/- 5 nm". So, some will likely be 410, but some will likely be 400, and most will be closer to 405nm. Also, the wavelength of the diode shifts some with temperature, so that's going to affect your results as well if you're running contintuously.

How close top 410nm does it have to be? 405 is higher energy than 410, so if you're looking for absorption/fluorescence, then 405 should likely fluoresce just as well as 410, but you'll get some small amount of extra heat. But then again, I don't know exactly what you're doing, so 405 may not work as well as 410.

 

[randomlugia]

Daguin has had blu-ray diodes up to 415nm.

 

[hydrogenman15]

Daguin has had blu-ray diodes up to 415nm.

That doesn't really surprise me cause my blu-ray is definitely over 415nm cause its so much bluer then all the others are. My lab-ray is probably below 400nm's and is not nearly as blue as the other one.

--hydro15

 

[artix]

The DT-8011s usually have a higher wl then the PHR-803Ts. Many of our laser sled suppliers where trying to sell DT-8011s as 12x burners!

 

[pseudolobster]

The DT-8011s usually have a higher wl then the PHR-803Ts. Many of our laser sled suppliers where trying to sell DT-8011s as 12x burners!

That's just shady suppliers... No one could be that naive, misinformed, or ignorant while trying to sell a product that doesn't even exist yet... They're clearly just trying to scam you.

Anyways, I can attest that the 8011's seem to be "brighter" while running at a lower current and producing less power... I was really kinda surprised when I saw the beam off my first 8011 in a very slightly smoky room at 80mW... I've had 803t's running at 150mA that seemed less bright (though were undoubtedly more powerful).

[edit]note to self: stop abusing ellipses.[/edit]

 

[daguin]

The DT-8011s usually have a higher wl then the PHR-803Ts. Many of our laser sled suppliers where trying to sell DT-8011s as 12x burners!

I've now had seven of the DT-0811 diodes tested for wavelength. Only one tested above 410nm. All the rest have fallen between 404nm-408nm. I have also seen PHR-803T diodes that were bluer and brighter than most. I truly think these are simply the luck of the draw. If you get one, hang on to it and treat it nice. An 80mW at 415nm is brighter than 150mW at 405nm.

Peace,
dave

 

[hydrogenman15]

[quote author=Artix link=1226329490/0#5 date=1227236910]The DT-8011s usually have a higher wl then the PHR-803Ts. Many of our laser sled suppliers where trying to sell DT-8011s as 12x burners!

I've now had seven of the DT-0811 diodes tested for wavelength. Only one tested above 410nm. All the rest have fallen between 404nm-408nm. I have also seen PHR-803T diodes that were bluer and brighter than most. I truly think these are simply the luck of the draw. If you get one, hang on to it and treat it nice. An 80mW at 415nm is brighter than 150mW at 405nm.

Peace,
dave[/quote]

Heat perhaps? At some extreme currents things can get very weird. It will turn "blue" at 550ma's but its already zombified at that point.
http://www.youtube.com/watch?v=EORq5JXD-Bk you can't really see it very well on the camera though...

PS: it was long dead before I did this.

--hydro15