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FrozenGate by Avery

NDS-7175 Skyblue LD ?

Arctos said:
I too welcome our high power SM and MM overlords :)
Am investigating adding them to our projectors. Order of magnitude lumen jump over 445.. enough said.
Also looked at some solid state yellows last month but price is... high. Little bit like the micro greens but not mass market.
Click to expand...

Solid state yellows.......what have you found....for sale ?

Links please.
 





If I misunderstood your question as meaning direct diode lasers I apologize. It sounded that way because of the direct diode discussion.
 
When Arctos said that he had also looked at some solid state yellows I took it to mean dpss because he used the word " also " and because I know people often say solid state when they mean diode pumped solid state.
However I also know that directs are solid state because solid state in reference to lasers means the gain medium is not liquid as it is in a dye laser. ;)
 
Actually, many lasers are gas medium, not liquid. Until this century most were gas lasers.
 
Gas lasers are not solid state as it's the gas that's the gain medium, I used a dye laser as an example of a non solid state laser, it's of course not the only non solid state laser.
 
RedCowboy said:
Solid state yellows.......what have you found....for sale ?

Links please.
Click to expand...

Not something I can link as they are R&D only currently, not advertised online nor for sale online and there are only a few of them in existence. But I have seen them and had discussions with the manufacturer, they are mostly for medical market at this point but even that has not eventuated to my knowledge. They are not diode nor technically DPSS.. another type of SSL (it's a clue.. there are not that many types left in this form factor especially at such power ;)). ~5x4cm in a butterfly housing so would be a large pointer but could definitely be shrunk down to a more narrow packaging. For now DPSS is the way to go for pointers. Lets just say you could almost buy 6W of OPSL for the price of one of these, they are over 1W and less than 2W.. but they are single mode and far superior BQ and beam parameters to OPSL. A bad one would be 15 picometers of linewidth. If anyone with crazy money wants one please get in touch but it would take some time to engineer the drivers for it.

This is a slightly similar design here below but it's really for IR, sorry for the crappy photo, yellow has another step or two involved. At such low volume it's hand placed, hence the cost.
Maybe could get them down to 2.5x5cm or so.. much more reasonable for pointers (i'd love a true gold pointer) but again $$$$.
SS yellow.jpg
There also are exotic green WL also. The transition from green to yellow is very abrupt in terms of WL change, more so than any other major colour transition I have seen.

And yes the NDS7175 is real, now the datasheet is public I can tell you they are not going to be in a pointer or high volume laser projector any time soon (i'd say 5 years from now maybe unless Sharp pulls a rabbit out of the hat), the cost is in the range at lower manufacturing volumes that one poster mentioned is prohibitive. It's barely do-able for custom applications for us. Have had some delays in two projects (and ran out of time to test the ES we had - sorry, have barely had time to be on here since last post) that will use them, but I will be ordering some in the next three months if all goes well, one customer wants somewhere north of 30W for a project and another for scientific use at lower power. I can only imagine how bright it will be with night adjusted eyes. More lumens than even green!
I'll try to keep a few spare for a crazy lower power lumia/personal PJ project.. but need to get the dichros sorted first, maybe even temporarily in pointer guise just to tick that dream off for ya'll if I can wrangle it past the boss (who hates pointers due to the legal issues they have caused the show industry)
 
Arctos said:
Not something I can link as they are R&D only currently, not advertised online nor for sale online and there are only a few of them in existence. But I have seen them and had discussions with the manufacturer, they are mostly for medical market at this point but even that has not eventuated to my knowledge. They are not diode nor technically DPSS.. another type of SSL (it's a clue.. there are not that many types left in this form factor especially at such power ;)). ~5x4cm in a butterfly housing so would be a large pointer but could definitely be shrunk down to a more narrow packaging. For now DPSS is the way to go for pointers. Lets just say you could almost buy 6W of OPSL for the price of one of these, they are over 1W and less than 2W.. but they are single mode and far superior BQ and beam parameters to OPSL. A bad one would be 15 picometers of linewidth. If anyone with crazy money wants one please get in touch but it would take some time to engineer the drivers for it.

This is a slightly similar design here below but it's really for IR, sorry for the crappy photo, yellow has another step or two involved. At such low volume it's hand placed, hence the cost.
Maybe could get them down to 2.5x5cm or so.. much more reasonable for pointers (i'd love a true gold pointer) but again $$$$.
View attachment 67093
There also are exotic green WL also. The transition from green to yellow is very abrupt in terms of WL change, more so than any other major colour transition I have seen.

And yes the NDS7175 is real, now the datasheet is public I can tell you they are not going to be in a pointer or high volume laser projector any time soon (i'd say 5 years from now maybe unless Sharp pulls a rabbit out of the hat), the cost is in the range at lower manufacturing volumes that one poster mentioned is prohibitive. It's barely do-able for custom applications for us. Have had some delays in two projects (and ran out of time to test the ES we had - sorry, have barely had time to be on here since last post) that will use them, but I will be ordering some in the next three months if all goes well, one customer wants somewhere north of 30W for a project and another for scientific use at lower power. I can only imagine how bright it will be with night adjusted eyes. More lumens than even green!
I'll try to keep a few spare for a crazy lower power lumia/personal PJ project.. but need to get the dichros sorted first, maybe even temporarily in pointer guise just to tick that dream off for ya'll if I can wrangle it past the boss (who hates pointers due to the legal issues they have caused the show industry)
Click to expand...
What parts are shown in the photo?
 
steve001 said:
What parts are shown in the photo?
Click to expand...


It is master oscillator power amplifier system. A low power single frequency (dbr) diode is amplified to W powers. From right to left:

DBR Diode, two cylindrical lenses to collimate, optical isolator, two cylindrical lenses to focus into the amplifier, amplifier, two cylindrical lenses for collimation.

This is in the IR and is then doubled in a single pass into the yellow range.

Here are some official infos:

Cooperations

FBH is actively involved in numerous regional, national and international networks, associations and collaborative research projects.
www.fbh-berlin.com www.fbh-berlin.com

Singlemode
 
Singlemode Laser said:
It is master oscillator power amplifier system. A low power single frequency (dbr) diode is amplified to W powers. From right to left:

DBR Diode, two cylindrical lenses to collimate, optical isolator, two cylindrical lenses to focus into the amplifier, amplifier, two cylindrical lenses for collimation.

This is in the IR and is then doubled in a single pass into the yellow range.

Here are some official infos:

Cooperations

FBH is actively involved in numerous regional, national and international networks, associations and collaborative research projects.
www.fbh-berlin.com www.fbh-berlin.com

Singlemode
Click to expand...
Close enough. Nice work.

1576700647699.png
 
Singlemode Laser said:
It's not close but exactly what you have posted previously. And why you say you can't link everything and then post a figure from a paper?

Singlemode
Click to expand...
It's exactly what is shown but not the entire design.
Was asked for a link to it for sale of which there is none. The information posted is not available on their website either but it is public if you find it, I was given it by the manufacturer in this case (again, no link). I don't spend many hours a day working to post everything learned or investigated for commercial use on a public forum for free or to help potential competitors.
If you figure the clues out like you did (nice ;)), then everyone learns and then more info comes. Spoon-feeding is not a very effective way to learn.
Cheers
 
Singlemode Laser said:
It is master oscillator power amplifier system. A low power single frequency (dbr) diode is amplified to W powers. From right to left:

DBR Diode, two cylindrical lenses to collimate, optical isolator, two cylindrical lenses to focus into the amplifier, amplifier, two cylindrical lenses for collimation.

This is in the IR and is then doubled in a single pass into the yellow range.

Here are some official infos:

Cooperations

FBH is actively involved in numerous regional, national and international networks, associations and collaborative research projects.
www.fbh-berlin.com www.fbh-berlin.com

Singlemode
Click to expand...

It's great to see you posing again. Thanks! (y)
 
Arctos said:
It's exactly what is shown but not the entire design.
Was asked for a link to it for sale of which there is none. The information posted is not available on their website either but it is public if you find it, I was given it by the manufacturer in this case (again, no link). I don't spend many hours a day working to post everything learned or investigated for commercial use on a public forum for free or to help potential competitors.
If you figure the clues out like you did (nice ;)), then everyone learns and then more info comes. Spoon-feeding is not a very effective way to learn.
Cheers
Click to expand...

Wuff wuff
Singlemode
 
Last edited:
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