Fiber Coupled 520nm diode and others between 420-440nm

[deadshadow]

hello everyone today i was searching for diodes on google and i saw this diode:

LDX-3125-520-FC: 520nm Fiber Coupled Laser Diode - Solid State Lasers and Laser Diodes from RPMC Lasers Inc

i dont know exactly the differences with the normal diodes but this has a weird can(to fit a fiber i guess) but my eyes stuck on the "700mw 520nm output".

so what output this weird can could have?


also on the same site i noticed another very interesting diode.they have diodes with wavelengh 420,425,430,435 and 440nm which i never saw before and if they exist they will be something between violet and blue.

links
TG420: 420nm Blue Laser Diode - Solid State Lasers and Laser Diodes from RPMC Lasers Inc
50mW Laser Diode Blue | 425nm Single Mode Laser Diode
50mW Blue Laser Diode | 430nm Single Mode Laser Diode
TG435: 435nm Blue Laser Diode - Solid State Lasers and Laser Diodes from RPMC Lasers Inc
TG440: 440nm Blue Laser Diode - Solid State Lasers and Laser Diodes from RPMC Lasers Inc

 

[NightExplorer96]

Some other sellers have those too, like Thorlabs or Roithner. I don't think it'd be worth it to buy them simply for the color. Not much of a color change in that part of the spectrum like in the yellow and orange!

Nice find however!

-Alex

 

[Alaskan]

NICE! I have been looking for something like that, but I bet too $$$

 

[deadshadow]

Some other sellers have those too, like Thorlabs or Roithner. I don't think it'd be worth it to buy them simply for the color. Not much of a color change in that part of the spectrum like in the yellow and orange!

Nice find however!

-Alex

im definetly interested for the higher wavelengh that still looks purple in my eyes for the best beam visibilty

NICE! I have been looking for something like that, but I bet too $$$

yes those look awesome but im afraid to learn the price tag

 

[Atomicrox]

Anyone has a price tag for the blue-violet lasers?

 

[paul1598419]

I see the 520nm link has a threaded front for a 100 um MM fiber optic cable. If you wanted to collimate this after coupling it would take some special optics. The others are very similar to other offerings on other sites.

 

[ZRaffleticket]

Well I'm not afriad to ask... Just sent an inquiry for the 425, 430, and 435. We have 405's that hit 415-420 so I'm not asking for anything lower. I'll report back if these are more or less affordable than 488nm diodes.

My personal interest is in the 430nm.

Edit:

Also asked about the 460nm. That'd be nice to have in a single mode.

 

[diachi]

NICE! I have been looking for something like that, but I bet too $$$

Likewise, I want to see what sort of beam quality we can get out of those cheap ~$10 bonded Vanadate/KTP sets from eBay. Figured something like this would make fiber coupling a ~500mW 808nm diode easier, and would produce better results than other available beam correction optics. Obviously the short cavity and non-optimized cavity optics would limit results, but having a decent pump beam helps. Didn't want to deal with X-Y-Z translation stages or any of that to get good coupling into the fiber.

 

[Singlemode Laser]

Well I'm not afriad to ask... Just sent an inquiry for the 425, 430, and 435. We have 405's that hit 415-420 so I'm not asking for anything lower. I'll report back if these are more or less affordable than 488nm diodes.

My personal interest is in the 430nm.

Edit:

Also asked about the 460nm. That'd be nice to have in a single mode.

The Singlemode diodes are from TopGAN a fairly new spin off from a polish university. They also have a very basic online shop and the prices for all the wl are 300$ per diode.

I am thinking for at least half a year to purchase from. On their website they claim to be able to offer 200mW diodes, but in their shop and on this website I could only find the 50mW versions...


430nm and 460nm are also the wl of my interest. Especially the 430nm could only be purchased from NICHIA afaIk.

Singlemode

 

[Singlemode Laser]

Likewise, I want to see what sort of beam quality we can get out of those cheap ~$10 bonded Vanadate/KTP sets from eBay. Figured something like this would make fiber coupling a ~500mW 808nm diode easier, and would produce better results than other available beam correction optics. Obviously the short cavity and non-optimized cavity optics would limit results, but having a decent pump beam helps. Didn't want to deal with X-Y-Z translation stages or any of that to get good coupling into the fiber.

You can also buy these adapter for around 20$. You then need a long m9 thread that would fit your diode collimation lens and this adapter with a second lens for focusing (or you use just one suitable lens, that would be one with half the focal lengh)

Remember, that such easy coupling is only possible for multimode fibres and will always introduce heavy speckle patterns at the beam output ( you can eliminate them with some electronics thought). For pumping a laser crystal this shouldn't be necessary, but for nice beam pictures people love here so much it is.

Singlemode

 

[Atomicrox]

The Singlemode diodes are from TopGAN a fairly new spin off from a polish university. They also have a very basic online shop and the prices for all the wl are 300$ per diode.

I am thinking for at least half a year to purchase from. On their website they claim to be able to offer 200mW diodes, but in their shop and on this website I could only find the 50mW versions...


430nm and 460nm are also the wl of my interest. Especially the 430nm could only be purchased from NICHIA afaIk.

Singlemode

Their store doesn't seem to be working here.
store soon ? topganlasers.com

 

[Singlemode Laser]

Their store doesn't seem to be working here.
store soon ? topganlasers.com

It's not working since they opened the page but you can contact them directly and they answered pretty fast.


Some months ago I googled them and found a direct link to their shop. Can not find it now (damn). They offered ~ 50 diodes individually binned for 300$ each.

They seem not to really care about their webpage though, what I can totally understand. As a young university spin-off they are mostly involved in government or EU funded R&D programmes. This way they can grow and increase their know-how much faster and safer then selling the small amount of diodes they can produce at the moment.

Actually, pushing with full resources for semi mass production would be their last step and they would get broke soon.

Singlemode

 

[paul1598419]

@ Singlemode Lasers

The new iterations of the 505nm Sharp diodes are mailed to me today from California. I should have them in just a few days. Will update with wavelength specs on the ones I receive.

 

[Singlemode Laser]

@ Singlemode Lasers

The new iterations of the 505nm Sharp diodes are mailed to me today from California. I should have them in just a few days. Will update with wavelength specs on the ones I receive.

That's great news Paul! Can't wait to get your specs.

Singlemode

 

[paul1598419]

I'm hoping to have the results by the middle of the week. Depends on the mail.

 

[diachi]

You can also buy these adapter for around 20$. You then need a long m9 thread that would fit your diode collimation lens and this adapter with a second lens for focusing (or you use just one suitable lens, that would be one with half the focal lengh)

Remember, that such easy coupling is only possible for multimode fibres and will always introduce heavy speckle patterns at the beam output ( you can eliminate them with some electronics thought). For pumping a laser crystal this shouldn't be necessary, but for nice beam pictures people love here so much it is.

Singlemode

Will take a look for those! That would do the job nicely.

MM fiber is fine for pumping, as you said, more about the beam shape than anything else. Keep in mind the big FC pumps use diode arrays coupled to fiber bundles (19 emitters/19 fibers) and those work well.