NUBM0C 465nm 4.1 Watt Laser Diode with square spot FAC (Fast Axis correction) offered for sale from Laser Tree on ebay by seller: 'sabzh21'

[Timothy_Egoroff]

I Discussed modification of the 'NUBM0C' Sky Blue 465nm, 4.1 Watt Laser diode with an e bay seller
(Laser Tree) who supplies modified laser diodes to companies and individuals, they stated that they will sell said Laser Diode Upon Request (I don't know if or when it will be listed as a product)
I asked another seller on e bay who sells many fac corrected diodes, but they said they only have the original diode recapped with a flat lens (no fac lens).


I will post a link to the seller who will supply this diode modified to have an FAC (or an SAC lens if needed) and recapped and gas filled with a window, (the total nominal output power rang will likely be clipped/reduced by around 100 milliwatts due to the extra lens) but Given the beam will have better divergence, giving the output a square appearance, it should have greatly reduced over all divergence which may be comparable to an 'PLT5 450B'.
The NUBM0C is also reported to be stable at 4.5 Watts of CW output power.

the Link to the ebay seller, sabzh21 will be posted separately if necessary

If you actually want to buy any:
DM: sabzh21 through e bay messaging (for example: "Dear Laser Tree, I am interested in buying a Square Spot Fac modified Lens Recapped Gas filled can NUBM0C Laser Diode 465nm 4.1W")

they should respond with something like: "Hello Dear Friend, yes we can supply these, How many Units Do you want to buy, what is your company name etc..."

 

[Timothy_Egoroff]

My name from LPF Discord server is: Powdered Toast Mann! Lol
Dm for seller link if needed

 

[Gryphon]

I was eye balling some 9mm FAC diodes on ebay just last night (450nm, 520nm and 638nm). I pretty sure 2 of them are from the LaserTree seller. Does the square output lend itself well to being collimated by a short FL lens? I think someone tried a blue FAC diode and had to use a long FL lens something like 2" in front of the diode in order to keep the square ouput(big fat beam), otherwise it still produced the same 'bar' spot.

 

[Timothy_Egoroff]

'Does the square output lend itself well to being collimated by a short FL lens? I think someone tried a blue FAC diode and had to use a long FL lens something like 2" in front of it'

I bought an nugm04t FAC square spot Laser Diode Recanned and gas filled from 'optics LD' on the bay, I used a DTR G8 Lens which has an 8mm FL, it is damn sharp compared to the raw output from an unmodified one, but there was still a slight rectangular shape at distance, but i put it through a 3x beam expander and the beam was just like a single mode diode like a plt5 450b
With a long fl lens, spectacularly low divergence on both axes, but the 'fac nugm04' through the G8 Lens was very comparable to the divergence of a pltb450b, when without an fac lens, the nugm04t would have such terribly high divergence that it would look like a green nubm44.

There is a video of the nubm04t fac on youtube with maybe a g7 or a 3 element lens and you can tell how the divergence is comparable to a sharp low power diode

I think using a short fl lens is always going to increase divergence equally on both axes, but the fast axes will Look like it has expanded more because the slow axis is already so well collimated.

Optics LD and Laser Tree sell a massive range of FAC Recanned modified and un-modified diodes on their ebay stores, also on aliexpress.

The NUBM0C with fac correction would likely be identical in divergence characteristics to the NUGM04T In terms of both raw output and FAC corrected output, So if you want to find out more about the specifics of fac residual divergence, you can view threads on here I can link about fac lds

 

[Gryphon]

I bought an nugm04t FAC square spot Laser Diode Recanned and gas filled from 'optics LD' on the bay, I used a DTR G8 Lens which has an 8mm FL, it is damn sharp compared to the raw output from an unmodified one, but there was still a slight rectangular shape at distance

Slight rectangular is fine with me, I just not a huge fan of the huge bar on the NUBM44 that makes the laser look like a laser line module more than anything else. I might pick up a couple of these FAC diodes (different WL's) and have a go at them

 

[Timothy_Egoroff]

Slight rectangular is fine with me, I just not a huge fan of the huge bar on the NUBM44 that makes the laser look like a laser line module more than anything else. I might pick up a couple of these FAC diodes (different WL's) and have a go at them

Absolutely, they are fairly sharp really compared to standard lds for their power output, styropyro on youtube and discord made a mini laser with a 1.2W 638nm FAC LD from I think Lasertree on ebay, and it has one tight beam for that Diode especially

 

[Gryphon]

OpticsLD looks like they have better prices than LaserTree on 455nm and 525nm but LaserTree has 638nm. Ill probably start with the 638nm

 

[Timothy_Egoroff]

OpticsLD looks like they have better prices than LaserTree on 455nm and 525nm but LaserTree has 638nm. Ill probably start with the 638nm

Good choice, it is quite power efficient and 1.2 watts of 638nm is the same visual brightness at 3 watts of 445nm laser light, also has Good Divergence compared to most common un modified high power Red Laser Diodes noting that the most visible wavelength to the Human eye is 555nm.

The best Laser Diode driver for any of these diodes besides the Blackbuck 4.5A and 5.5A sold by dtr lpf,
Is the AstralSuperDrive Buck Laser Driver from Barnett unlimited on ebay, a google search of it will yield results.

For the red, the Micro Flex Drive (V5) from innolasers .com can output up to 1.5A up to 6v and can power from a single lithium ion battery battery

 

[Timothy_Egoroff]

There has been an update from the seller, they sent me an official datasheet for the FAC Square Output Beam NUBM0C Laser Diode, and said they are going to list the product and send the link to me.

Here is their message with the datasheet:

 

[Gryphon]

Their site lists a 4.1W FAC 465nm diode.

Lasertree 465nm 4100mW High Power Blue Laser Diode whit FAC Square

Laser Specifications LT-LD-465-4100M-FS.pdf Features Part Number: LT-LD-465-4100M-FS Brand Name: Laser Tree Product Type: Laser Diode Wavelength: 465nm Optical Power: 4100mW Package Type: TO9

lasertree.com

Is this it already available?

 

[Timothy_Egoroff]

Their site lists a 4.1W FAC 465nm diode...

Yes I think it is, I can tell that it must be a new listing because it has an abvious typo 'whit' (they meant to type: with) I viewed their product 15 minutes after I got your message.
This is exciting. Ill place an order for one in the very near future.

 

[Gryphon]

I got the 638nm FAC square diode today and built it up to test out. It does indeed produce a square dot and makes 1W of bright red light

Unfortunately it still produces a horrid line when focused down. I only have the standard plastic and G8 lenses on hand to test with. I wonder if any of the standard 9mm lenses we have floating around will keep it a square dot when focused.

 

[RedCowboy]

Try a longer focal length lens.....longer than G8/8mmFL

If you want to keep a square beam you will need a convex cyl lens for each axis.

5W FAC laser diode ( line output )

Just testing one of the fac enhanced 5W multi mode blues ( line output ) the spec sheet looks identical to 7A75 raw divergence before the added fac of course, the raw output with it's fac is a bar but much smaller than it would be without the fac. I set up a random lens from my collection of...

laserpointerforums.com

 

[Shmackitup]

I've found the FAC diodes aren't very good for laser pointers. The FAC is setup for a much shorter focal range so the fast axis is over corrected at longer distances and looks just like a line as it would without the FAC.

 

[RedCowboy]

I really like the c-lens correction for non-fac diodes such as is used in the sparrow units live laser systems makes for producing more uniform beams.

However using the FAC modified diodes you can zoom to distance with a larger, longer focal length lens, or use a cyl. lens for each axis set to infinity focus to correct for the uneven divergence and then a beam expander....... but it's not as simple as screwing in one of our standard 9mm barreled M9x0.5 threaded lenses such as a G2 or G8.

I have always wanted to have some 20mm wide modules made so we could mount up to 17-18mm wide aspheric lenses in threaded 19mm barrels which I expect the correct grind would also work pretty well with the FAC diodes, but yes they are optimized for home CNC use....... maybe a double concave with a retaining/locking ring followed by an adjustable double convex or an aspheric.

 

[Gryphon]

The FAC is setup for a much shorter focal range so the fast axis is over corrected at longer distances and looks just like a line as it would without the FAC.

Thats unfortunate, I was hoping the correction would at least make it better than the HL63193MG I already have since they both produce 1W of 638nm.