(Correction - NOT DPSS) Red DPSS Module On E-bay

• Oct 28, 2010

• #1

jayrob

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Sorry if this has been covered, but has anybody tried one of these?
200mW 660nm Red Dot Laser Moudle/12x60mm DIY/Industrial - eBay (item 260563920297 end time Oct-31-10 23:27:43 PDT)

If they are really 200mW's, I want to try them...

Just hoping to get some input before I buy...

Thanks in advance!

 

Last edited: Oct 29, 2010

• Oct 28, 2010

• #2

RA_pierce

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Re: Red DPSS Module On E-bay

Doesn't look like DPSS to me, especially at that price and wavelength. Most likely just a diode.

 

• Oct 28, 2010

• #3

Xtrm2Rick

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Re: Red DPSS Module On E-bay

<350mA

my guessing would be that its a red diode in a green type of housing , i also fail to see where he described red dpss:thinking:

 

• Oct 28, 2010

• #4

AJ_Dual

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Re: Red DPSS Module On E-bay

What kind of crystal chemistry would even produce red? I'm sure all sorts of gas and even dye lasers could, but I've never heard of red DPSS.

Does not mean it doesn't exist though. My knowledge is admittedly limited.

Never mind... apparently Nd:YLF, Nd:YAG, and Nd:YVO4 all can produce various reds. Trying to figure out what the pump frequencies are.

 

Last edited: Oct 28, 2010

• Oct 28, 2010

• #5

jayrob

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Re: Red DPSS Module On E-bay

Yeah I don't know about red dpss either. I just assumed it was from looking at it.

Hmmm...

 

• Oct 28, 2010

• #6

Xtrm2Rick

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Re: Red DPSS Module On E-bay

AJ_Dual said:

What kind of crystal chemistry would even produce red? I'm sure all sorts of gas and even dye lasers could, but I've never heard of red DPSS.

Does not mean it doesn't exist though. My knowledge is admittedly limited.

Never mind... apparently Nd:YLF, Nd:YAG, and Nd:YVO4 all can produce various reds. Trying to figure out what the pump frequencies are.

Click to expand...

so far i have only seen 671nm as dpss module, not to sure about what wavelenghts and crystals used

i gotta learn more of this stuff!! google and search button here i come!!

 

Last edited: Oct 28, 2010

• Oct 28, 2010

• #7

Trevor

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Re: Red DPSS Module On E-bay

AJ_Dual said:

Trying to figure out what the pump frequencies are.

Click to expand...

Just one example, the 1342nm line from Nd:YVO4 pumped with 808nm is doubled to 671nm.

-Trevor

 

• Oct 28, 2010

• #8

DashApple

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Re: Red DPSS Module On E-bay

Yeah ,

671 is the DPSS red its 808nm Pumps Nd:YVO4 Gives 1342nm is SHG By KTP to give the 671nm , The SHG crystal Is KTP I belive same as green 532nm .

 

Last edited: Oct 28, 2010

• Oct 28, 2010

• #9

Gryphon

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Re: Red DPSS Module On E-bay

That would be the steal of the day if it were a dpss red, i would be nice to have a nice thin beam of red.

 

• Oct 28, 2010

• #10

IsaacT

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Re: Red DPSS Module On E-bay

But wait...as Xtrm2Rick pointed out, it is operating at less than 350mA. The green DPSS's(since the process is similar, I assume the outcome would be roughly similar) that we use need a pumped 808 diode many times as powerful as the resulting visible beam. At less than 350mA, with a result of 200mW, the laser would be operating VERY efficiently. This doesn't seem possible. :undecided:

 

• Oct 28, 2010

• #11

jayrob

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Re: Red DPSS Module On E-bay

I posted a question to the seller from their page to ask if it is DPSS 671, or just a red diode pressed into the brass module...

I'll post back after they answer...

 

• Oct 28, 2010

• #12

Grix

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Re: Red DPSS Module On E-bay

I'm willing to bet my liver it's a diode laser. I have seen plenty of diodes in those modules. And if it were DPSS, it doesn't have to be 671nm. 640nm is more common.

 

• Oct 28, 2010

• #13

andy_con

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Re: Red DPSS Module On E-bay

its just a standard 660nm diode, why would it be a 671 dpss?

he says its a 660nm laser

 

• Oct 28, 2010

• #14

DashApple

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Re: Red DPSS Module On E-bay

I bet to Its a 660nm Diode , And if By a far charnce its 671 , 350ma Draw Is very low for 200mw , My 250 Draws 2.5 amps @ 5 v ,

Grix : , 640nm is a diode laser To Not dpss .

 

• Oct 28, 2010

• #15

Grix

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Re: Red DPSS Module On E-bay

ionlaser555 said:

Grix : , 640nm is a diode laser To Not dpss .

Click to expand...

I am pretty sure 640nm is typically DPSS. I know there are diodes around that wavelength too tho.

Here f.ex:

http://laserpointerforums.com/f52/640nm-dpss-portable-short-review-55495.html

 

• Oct 28, 2010

• #16

DashApple

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Re: Red DPSS Module On E-bay

Grix said:

I am pretty sure 640nm is typically DPSS. I know there are diodes around that wavelength too tho.

Here f.ex:

http://laserpointerforums.com/f52/640nm-dpss-portable-short-review-55495.html

Click to expand...

Still Pritty sure 640 is Diode , There a few Builds with them , even On that thread People Have said 640 is Diode , , But If 640 is dpss , Its new to me then and most otheres , if im wrong , Sorry .

 

Last edited: Oct 28, 2010