37 replies to this topic

[proffski]

publicnme, on 04 July 2011 - 06:01 PM, said:

Do you know where I can get some fairly inexpensive mirrors for a laser rod like that? As I said in another post, I found an Nd:YAG rod for about $40, but I can't seem to find any suitable mirrors for less than $100. Could I just use a "normal" mirror on the back and then only have to pay for the 50% mirror in the front?

My rod off ePrey was supplied with both ends already polished and mirrored (dichroic silvering)on both ends.
Its downfall was multible firings without allowing enough time for cooling, it may have been an imperfection but after several thousand firings and a few weeks or so it shattered. I have never heard of this happening to the rod, but have experinced flash lamp failure several times!

[TheHomebrewGuru2]

Just look at my tutorial if you want to make one:
http://www.instructa...-Gun-at-Home-1/

Uses same laser head as the one on hackaday

[proffski]

publicnme, on 04 July 2011 - 06:01 PM, said:

Do you know where I can get some fairly inexpensive mirrors for a laser rod like that? As I said in another post, I found an Nd:YAG rod for about $40, but I can't seem to find any suitable mirrors for less than $100. Could I just use a "normal" mirror on the back and then only have to pay for the 50% mirror in the front?

My Neodymium rod came ready perfectly polished and both ends fully mirrored to high specification. The mirror finish looks as if it is dichroic.

[evlaser]

Since lasers are inherently inefficient at converting electrical energy to light energy,
it would require a lot of power to generate 1MW of light output.
Flashlamp based NDYag systems may have efficiencies (at best) of 5%.
Diode pulsed systems can boast efficiencies of up to 10%.
I work on NDYag systems that produce 10 watts of power using a flashlamp.
These systems require a power supply that produces up to 800 volts and 300 amps for the
10 watts of light energy that is finally produced. The power supply for these systems weighs
about 40 lbs.
So the claim that someone has produced a 1MW hand held laser using batteries is
highly unbelieveable. It would certainly require a lot of incoming juice to create
an energy output of that magnitude.

[Cyparagon]

Where to begin?...

It uses an SSY-1 (surplus rangefinder for a tank). It does somewhere between 10kW and 100kW peak (not quite the megawatt he claims), but keep in mind this is only for a few tens of microseconds. Pulsed lasers are measured in JOULES, not watts. It takes roughly 100J of input and outputs 1J. He only said megawatt because he's trying to impress people, and this seems to be his only goal in life. He only posts in threads that are about him.

YAGs are EXTREMELY dangerous. The peak output is VERY high, and it is obviously invisible. It is the most ridiculous way of "burning things" I can think of.

[Paul Wilson]

Looks like something from Star Wars - you could really do some damage with that laser device

[Arayan]

I add two movies on this KW range pulse laser gun. I state that is capable of making holes in a can, while my 40W CO2 laser can't.

[BluRay]

But it's obviously not 1 MegaWatt you know. It'a handheld...

[Arayan]

BluRay, on 08 October 2011 - 10:01 AM, said:

But it's obviously not 1 MegaWatt you know. It'a handheld...

It's a mistake to measure the power of pulsed lasers in Watts (Joules is more correct), however if you really want to do a conversion, this object outputs more than 30 KW of power.

[BluRay]

How can the batteries give that much?

[Arayan]

BluRay, on 09 October 2011 - 08:51 AM, said:

How can the batteries give that much?

There are the capacitors which output over 15.000V
http://www.repairfaq...rscl.htm#sclsy1

[BluRay]

ok so even though the current might be, say, 2A, the voltage is very high...

[Cyparagon]

Arayan, on 09 October 2011 - 09:01 AM, said:

There are the capacitors which output over 15.000V

BS is hereby called. I'm pretty sure the flashlamp operates at <1000V.

[Arayan]

Cyparagon, on 09 October 2011 - 02:12 PM, said:

BS is hereby called. I'm pretty sure the flashlamp operates at <1000V.

Yes, I'm sorry for these lamps the voltage are usually from 1 to 3 KV...

[Melo]

about 1 kilowatt (1000 watts, which equal to ten 100-watt light bulbs) LoL

[BluRay]

Bravo! kV means kiloVolt .
This thread is a little old...

[Addict 7s]

That looks super cool.

How much are they?

[Arayan]

Addict 7s, on 01 February 2012 - 12:46 PM, said:

That looks super cool.

How much are they?

Try to contact Patrick... here his site http://www.laser-gadgets.com/