Why does This lcd screen separating "Lazer" state it's 1064 NM when there is an 808nm module


  1. Why does the machine states it’s 1064 NM when there is an 808nm module
  2. Is it common for people to put 808 nanometer lasers inside of fiber lasers better?
  3. Watching videos of this I’m triangle cell phone screen operator functioning is pretty cool as it just cuts right through the glass and removes the adhesive and paint underneath and it looks like a 808 has a lot of difficulty with clear and I guess we’ll vaporize the glue right under

I’m

I guess this is the same machine you are discussing here ?

My short answer is that a lot of sellers on AliExpress are quite slapdash about how they put their product listings together. In particular; images get copy/pasted from other listings, listing titles get padded out with SEO optimised keywords.

I’ve had items delivered that didnt match specs; and was able to resolve this with the seller, plus there is a displutes system for recent purchases).

I cannot answer the question of which is better for doing mobile screens; 1064nm vs 808nm. That sort of question needs to be asked on a technically oriented mobile repair phone forum.

  • But if you need a 1064nm machine for your work, and think you were mislead by the listing, then you need to take it up directly with the seller/aliexpress.

I bought this used cell phone machine for fun hobby use. and was not mis led. I just wondered if it was common for most machines to have an 808 and then dope the optics glasses with dumbiechbium or whatever.

Ok; thats clear; sounds like a fun tool to acquire.

From my limited knowledge of this type of laser I think you are right that the laser frequency is determined by the fibre doping, not the pump source.

You may get a better answer to this question on a fibre-laser specific forum; I know a lot of fibre laser users are on /r/lasercutting for instance… (I try to avoid reddit; but some subreddits are OK)

I’ve been researching these for about 2 years now. I agree with @easytarget that the pump frequency doesn’t have to be output frequency.

Not only is it dependent on doping of the glass, also the angle of injection into the fiber…

You’re dealing with an emf emission, no different than a normal RF (or any other) signal where things are mixed or multiplied to get the desired frequency. I see no place for it to change frequencies, like no fiber.


However, what I don’t see is the fiber itself in any of these photos. I would expect the machine in the posted link, to call it a fiber, if that was the case.

Neither one of them seem to have any fiber for a fiber or amplification part of the laser.

In the advertisement for the module, they do not mention it being an actual fiber laser source.

Here’s a couple of photos of the insides of fiber machines, you can easily see the fiber loop.

A few different frequency fiber diagrams. If you notice the fiber for amplification is obvious.

:smile_cat:

3 Likes

It is a fiber laser

Where is the fiber?

:smiley_cat:

Maybe the pic did not upload? It’s the long yellow fiber optic looking fiber optic cable.


Look over here it’s an SMA connector on the fiber optic cable end.

There is about 3 - 6m of fiber in a fiber laser, some even more. It’s not physically large enough to hold fiber of any length and it’s output is very low.

This is how a fiber laser works…

This is a commercial fiber lasers insides. The fiber is quite clear.

I’m assuming that yours is likely a yag diode assembly. But don’t know.

:smiley_cat:


Take a look at this picture The yellow cable/spool is the fiber itself it’s about 2 m long it’s a 15 or 20 watt screen cutting laser but it also marks iron and cuts aluminum business cards

That cable is a fiber optics, only goes from the source to the galvo heads, it’s not an amplification fiber.

That module probably has 4, 5W lasers in it.

:smiley_cat:

Here’s what it’s got in it

This is much like a pump diode with only two diode lasers, generates your 808nM beam . There is no amplification fiber, so it’s not a fiber laser.

It’s possible that the yellow lead is a computed band pass filter only allowing 1064nM resonance…

Too bad we don’t have access to frequency counters in this range. :tired_face:

:smiley_cat:

1 Like

For what it’s worth the machinist specifically for lasering off the glue from the back of cell phones in their literature they state they can customize any frequency you would like perhaps if it’s 8:08 that’s more well suited for the glue job

Very possible and sounds more likely.

:smiley_cat: