Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

How to Register on LPF | LPF Donations

1W 445nm vs 2W 808nm






That's an invisible diode, it will show up as maybe a few mW of red, like a keychain laser, but it's going to be incredibly powerful and dangerous, and you'll need special and expensive goggles for IR protection.
 
I appreciate the response, but I was looking more for an answer as to which has the higher burning capability. Its clear which one has a higher output, but from what Ive read so far, the wavelength also affects the burning capability...please correct me if I'm wrong.

Thank you!
 
yes you are right, the lower end of the electro-magnetic spectrum has more photons meaning better burning capabilities, but because of the gap in power (~1W) the wavelength wouldn't really be taken into consideration... the 2W IR laser would still burn better than 1W of 445.

stuart :)
 
laserboystuart said:
yes you are right, the lower end of the electro-magnetic spectrum has more photons meaning better burning capabilities, but because of the gap in power (~1W) the wavelength wouldn't really be taken into consideration... the 2W IR laser would still burn better than 1W of 445.

stuart :)
Click to expand...

. . . . . . **IF** they have similar collimation and focus.

Peace,
dave
 
laserboystuart said:
yes you are right, the lower end of the electro-magnetic spectrum has more photons meaning better burning capabilities, but because of the gap in power (~1W) the wavelength wouldn't really be taken into consideration... the 2W IR laser would still burn better than 1W of 445.

stuart :)
Click to expand...

1mW = 1mW regardless of wavelength.
I don't know why the myth still exists.

Most important for burning:

1. Material type
2. Power
3. Power density
4. Absorption (color of object)
5. Wavelength (color of laser)

Edit: My >900mW 445 can set fire to twigs, cardboard, and wood chopsticks if done correctly. My >2W 808 will ignite paper, cotton, candles, etc. nearly instantaneously... even though the beam specs on the 445nm are much better. One thousand more milliWatts goes a long way.
 
Last edited:
If you´re interested, "drlava" is selling his focusable 1,2W 808nm IR laser
 
Most important for burning:

1. Material type - To burn, or the laser diode?
2. Power - For clarification, mW, right?
3. Power density - Not sure what you mean by this...
4. Absorption (color of object)
5. Wavelength (color of laser)

Thank you!
 
3. Power density is the amount of power (time rate of energy transfer) distributed over a given unit area perpendicular to the direction of travel. Power density is expressed in watts per square meter (W/m² ) or milliwatts per square centimeter (mW/cm²). Correct me if im wrong.

stuart :)
 
H4xS4w said:
Most important for burning:

1. Material type - To burn, or the laser diode?
2. Power - For clarification, mW, right?
3. Power density - Not sure what you mean by this...
4. Absorption (color of object)
5. Wavelength (color of laser)

Thank you!
Click to expand...

By material type, I mean the object you want to burn. Obviously, metals and rock will be difficult to destroy. Wood and plastics will be much easier.

Power is measured in Watts (W), and in lower power lasers, milliWatts (mW).

Power density is measured in W/cm^2.
What it means is how much power is crammed into the given area.
So, the smaller the point of light is, the higher the power density will be. This is the reason we like lasers with small beam diameters, low divergence, and that are focusable. Higher power density means higher visibility and more burning power. Focusing a laser forces all the photons in a beam of light to converge on a single point. The concept is the same as using a magnifying glass in the sun to burn things.
 
Ah! Ok! Thank you!

Are there methods of focusing convergence and minimizing the diameter of a factory bought laser?

If so, would you be able to point me to any resources for further info?
 
no offense man. but i don't think you are ready for a burning laser. you should do a lot more reading. especially on safety. I think you should start with a weak PHR blu-ray burner. 90mw or so. then you can get a true understanding for the power of a 1watt and higher laser.

michael
 
^^ agreed, you will thank chipdouglas later when you still have your vision and know how to safely operate a laser this powerful... these are not toys.

stuart :)
 
None taken, and I completely understand. Which is why I'm here!

I have already purchased the Arctic (order # 52,XXX), but have absolutely NO intention of using it anytime soon. Having a special room built out in my basement specifically for this which will take another week at minimum. (I can already see the cringes on peoples faces, but I'm not an irresponsible/immature person, have been handling high powered rifles and pistols all my life, therfore do possess a reasonable understanding of safety, caution, and attention to detail.)

So, in addition to my previous question regarding the possibilities of focusing factory lasers, my next question is the reliability of the LaserShades provided by WL.

I've read several topics that indicate both their adequacies as well as inadequacies, so I'm a bit confused. The Arctic produces a beam in the wavelength of 445nm, but the LaserShades supplied are labeled as 532nm. While my logic tells me that lenses rated for a higher wavelength shoudl be sufficient for lower wavelengths as well, I'd rather not leave the safety of my eyes to a guess or mere chance. So my question:

1. Are the LaserShades sufficient protection against the Arctic?
2. If not, would anyone be able to make recommendations? (Obviously, with my vision at stake, price isn't TOO much of a concern, but I'd rather not overpay if possible.)

Thank you all for your help and guidance!
 
You must log in or register to reply here.


Back
Top