Quiz : Guest the wavelength of this red laser.

[Blord]

I am puzzled about the wavelength of this red laser. On the left I have the 200mW red Dilda laser. This laser has a wavelength about 650nm. On the right side is the 40mW 635nm red diode from Ebay. This laser is running little overdriving at 120mA. Both laser have a comparibel brightness, maybe the Dilda has a slight edge.
In the middle is the mysterious red.

Who can give the estimated wavelength and the power of this laser. :shhh:

Left: red dilda, right 40mW 635nm LD and middle: ??

 

[3zuli]

642nm or 612nm

 

[elite ares]

Looks like it has some orange in the spot on my monitor so I'd say 635nm.

 

[bobhaha]

632.8nm @ ~10mW

 

[Braddubya]

I am puzzled about the wavelength of this red laser. On the left I have the 200mW red Dilda laser. This laser has a wavelength about 650nm. On the right side is the 40mW 635nm red diode from Ebay. This laser is running little overdriving at 120mA. Both laser have a comparibel brightness, maybe the Dilda has a slight edge.
In the middle is the mysterious red.

Who can give the estimated wavelength and the power of this laser. :shhh:

right: red dilda, left 40mW 635nm LD and middle: ??

Which is which?

 

[Blord]

Fixed !

The middle laser is a 50mW 650nm red laserpen,
http://www.dealextreme.com/details.dx/sku.39080
But the color is very similar to the Sanyo 635nm 40mW diode. I find this very strange. Maybe the wrong batch diode was used at the factory.

 

[Braddubya]

Your 200mW is over driven causing it to move up the spectrum vs the 5mW

The 635nm is also driven at its highest range causing it to move towards 650nm. According to its spec sheet its 640nm even at 10mW

So the 200mW is moving away from the 5mW and the 635nm is moving towards

 

[midias]

Your 200mW is over driven causing it to move up the spectrum vs the 5mW

The 635nm is also driven at its highest range causing it to move towards 650nm. According to its spec sheet its 640nm even at 10mW

So the 200mW is moving away from the 5mW and the 635nm is moving towards

According to the spec sheet it is ~638nm at 40mw at 20c. If he is driving at 40mw as he claims at ~100 - 110ma he shoudl be right around 638nm at normal room temp.

 

[mojo_1234]

guess it's a HENE...

 

[Braddubya]

Maybe I do not know how to accurately read this graph but

Doesn't it indicate a wavelength change due to power output even with stable temperature?

Also indicates that its nearly 641nm at 40mW which is getting pretty close to 650nm

 

[midias]

Maybe I do not know how to accurately read this graph but

Doesn't it indicate a wavelength change due to power output even with stable temperature?

Also indicates that its nearly 641nm at 40mW which is getting pretty close to 650nm

That just indicates how intense the beam is IE how bright at different power levels not what the beam actually is at those power levels. Because the diode can become those wavelengths but the typical is 638mw at 40mw at room temp (68F) and approx 639nm at 77F for the typical diode.