What's your Dream LASER Diode - IF it were affordable? Grand Purchase Plan

GreenBeam · Jan 19, 2011

Leodahsan said:
Answer: 2mRAD at most (IMO)

Thank you again, Leodahsan, so, my diode is three times better than
the one in that module, and at less cost.
And, it's medical grade quality.!!

Leodahsan said:
Man.. I think we can't just "push" the actual LD technology. You will not get 300mW with 1mRAD never.. because our materials used on LD's don't allow that (yet). The key is waiting for newer processes to be discovered and more efficienter diodes to be made.
MY 0.02 cents.

Very true! ... so again, my diode is at the cutting-edge of the latest possible technology
without going into the 1mrad or less, where it can't really be done yet,
without new technology , or great expense... TRUE?

So, Mr. Grix, what do you say now? ...
I know, you still want that other single mode diode

I rest my case ! :beer: and drink one from it :yh:

Leodahsan · Jan 19, 2011

GreenBeam said:
Thank you again, Leodahsan, so, my diode is three times better than
the one in that module, and at less cost.
And, it's medical grade quality.!!

your diode is 2mRAD? we should see what are the individual axiz divergence.

GreenBeam said:
Very true! ... so again, my diode is at the cutting-edge of the latest possible technology
without going into the 1mrad or less, where it can't really be done yet,
without new technology , or great expense... TRUE?

True.

at all, you look like a seller to me. Sure you aren't an employee of any company? Just a thought.

GreenBeam said:
...my diode

GreenBeam said:
...my diode three times better

GreenBeam said:
...Leodahsan...

Thats what I'm talking about. Just a feeling.

GreenBeam · Jan 19, 2011

Leodahsan said:
your diode is 2mRAD?
we should see what are the individual axiz divergence.

are you now unsure of your statement, without the "?" question mark?
Originally Posted by Leodahsan

Answer: 2mRAD at most (IMO)

Leodahsan said:
at all, you look like a seller to me. Sure you aren't an employee of any company? Just a thought.

Thats what I'm talking about. Just a feeling.

No, I'm not with the diode company, neither am I a salesman for any,
I have my own company into research and development and will use
any diodes not sold here in my own laser product designs.

I'm just trying to pass the savings onto this community and hobby site,
and wouldn't mind making some small profit too ...

I simply call it "my diode" to make it easier to tell the one I'm referring to.

Leodahsan · Jan 19, 2011

GreenBeam said:
are you now unsure of your statement, without the "?" question mark?
Originally Posted by Leodahsan
Answer: 2mRAD at most (IMO)

No, I'm not with the diode company, neither am I a salesman for any,
I have my own company into research and development and will use
any diodes not sold here in my own laser product designs.

I'm just trying to pass the savings onto this community and hobby site,
and wouldn't mind making some small profit too ...

I simply call it "my diode" to make it easier to tell the one I'm referring to.

wait, wait a sec.
You asked what is your LD divergence, I think you asked what is the 'worst divergence' we can tolerate. wait a second.

about your company.. don't take it as a offense.

edit:
Your diode is minimum 23º x 2º, typical 35º x 7º, max 45º x 12º.
Thats 0.40 x 0.03, typical 0.61 x 0.12, max 0.78 x 0.20 (radians).
don't know how to compare these, tho.

GreenBeam · Jan 19, 2011

Leodahsan said:
wait, wait a sec.
You asked what is your LD divergence, I think you asked what is the 'worst divergence' we can tolerate. wait a second.

I asked if you can calculate the mRAD rating as you did using the diode specs from the module company(GIF attachment)

Leodahsan said:
about your company.. don't take it as a offense.

I'm not offended by you asking who I work for or whatever, I'm just
confused as to how typing your name in my reply to you makes me
a salesman or owner of a laser diode company.

Leodahsan said:
Originally Posted by GreenBeam
...Leodahsan...

Leodahsan said:
edit:
Your diode is minimum 23º x 2º, typical 35º x 7º, max 45º x 12º.
Thats 0.40 x 0.03, typical 0.61 x 0.12, max 0.78 x 0.20 (radians).
don't know how to compare these, tho.

so, ... the average isn't used to make the calculation?
how did you come up with the mRAD rating with the two diodes?

Leodahsan · Jan 19, 2011

well, salesman are accostumed to say the "buyer" name a lot times: confirmed to make the buyer more confident and buy they products. Have seen a lotta things like this on the internet.

well, the module from CNI says its actual mRAD, 6mRAD.
your diode don't have it mRAD specification (divergence), just what I posted before (minimum 23º x 2º, typical 35º x 7º, max 45º x 12º). That equals to 0.40 x 0.03, typical 0.61 x 0.12, max 0.78 x 0.20, all in RADIANS. Dunno about mili radians (if my calculations are correct).
Wait for a more experienced member to take place here.

GreenBeam · Jan 19, 2011

Leodahsan said:
well, salesman are accostumed to say the "buyer" name a lot times: confirmed to make the buyer more confident and buy they products. Have seen a lotta things like this on the internet.

I was just emulating the kung-fu master way of speaking
to someone, grass-hopper ...
(... since you don't want me to type your name :tinfoil::scared

just jokin wit ya! - put da lazor down

Leodahsan said:
well, the module from CNI says its actual mRAD, 6mRAD.
your diode don't have it mRAD specification (divergence), just what I posted before (minimum 23º x 2º, typical 35º x 7º, max 45º x 12º). That equals to 0.40 x 0.03, typical 0.61 x 0.12, max 0.78 x 0.20, all in RADIANS. Dunno about mili radians (if my calculations are correct).
Wait for a more experienced member to take place here.

could it be the minimum and maximum for production runs,
or is it measured against the amount of current input? (more current in = more divergence?)

anyway, how'd you come up with the 2mRAD for the answer ...

Originally Posted by Leodahsan

Answer: 2mRAD at most (IMO)

Leodahsan · Jan 19, 2011

I answered a "maximum" for a good laser diode. anything above that would be too bad for a laser pointer IMO.

GreenBeam · Jan 19, 2011

Leodahsan said:
I answered a "maximum" for a good laser diode. anything above that would be too bad for a laser pointer IMO.

... so you misunderstood my question when I asked ...

GreenBeam said:
"... what's the mrad rating of the one I have to sell? ..."

no matter what diode is purchased, it will always need some optics for correction.
this one at least gives some extra mW for the same cost as the one Dr.Lava got you last time.

If / when you're ready to do a project where a "perfect" diode is needed, ...
I may also be able to get one or many of those from this same manufacturer.
they're really making some nice products, and getting better all the time.

BTW-please don't push these over the suggested limit, they're not $20 diodes
and you could loose your investment by pressing it too close over the highest current IN allowed.

I can also ask the manufacturer what the actual mRAD is for this diode,
and ask what the actual maximum current in is and not just the "safe" value in the specs,
so you don't kill your higher priced toy the first week you all have them :evil:

Leodahsan · Jan 19, 2011

Thats really, up to you. Try asking your manufacturer for the divergence when focused to infinity. We may get some interesting results. Gotta sleep, bb.

Grix · Jan 19, 2011

You should anyway request a sample diode to test the beam properties before making a large pruchase

GreenBeam · Jan 19, 2011

I asked them about the divergence question, ... they may not have fully
understood it, when asked about "focused to infinity", ... and mentioned a
FAC Lens to focus it, only being available for the C-mount version of the
500mW diode.

I re-asked the question, this time explaining, the need to know, how the measurment was taken.
with or without some kind of lens system mounted to the diode, or raw,
directly from the diode window... and if there is a mRAD measurement.

They did say, as I said before, the only single mode, and single element diode
they offer is the 30mW @ 635nm

YES Grix, I'm thinking the same thing, who will test the sample though?

Who here has all the optical test equipment to see the full specs directly from the sample diode?

Mohrenberg · Jan 20, 2011

GreenBeam said:
I asked them about the divergence question, ... they may not have fully
understood it, when asked about "focused to infinity", ... and mentioned a
FAC Lens to focus it, only being available for the C-mount version of the
500mW diode.

I re-asked the question, this time explaining, the need to know, how the measurment was taken.
with or without some kind of lens system mounted to the diode, or raw,
directly from the diode window... and if there is a mRAD measurement.

They did say, as I said before, the only single mode, and single element diode
they offer is the 30mW @ 635nm

YES Grix, I'm thinking the same thing, who will test the sample though?

Who here has all the optical test equipment to see the full specs directly from the sample diode?

for plotting and testing the diode i'd ask daguin or DTR. I'm not sure if either of them have the ability to measure the wavelength of the diodes though.

GreenBeam · Jan 20, 2011

Mohrenberg said:
for plotting and testing the diode i'd ask daguin or DTR. I'm not sure if either of them have the ability to measure the wavelength of the diodes though.

OHhhhh...! you edited it

I liked it the other way, it looked so positive ... and ...

Mohrenberg said:
I'd have Daguin or DTR test them off the top of my head. I know they both have all the equipment on hand necessary to test and plot the diodes. Plus DTR never sleeps so we'd get the result very quickly....

I was going to ask you, ... if there's a LAB on the top of your head :thinking:
where does the plot print-out come out?:crackup:

I'm sorry, ... I just could NOT resist !

getting back to the diodes ...

I don't know if testing the wavelength is as important to some here,
as much as the beam's divergence and shape, but yeah, eventually
we're going to want to know if it's the wavelength we paid for or not.!

and being these are more expensive BECAUSE of the wavelength they're
suppose to be, I'd say, it's best to find someone with most of the
equipment needed , then pass it to the one with the wavelength testing
meters.

Maybe nospin has an idea who , if not he, has the nM meter... :can:

Coherent Light · Jan 20, 2011

There are members that have the equipment to check the wavelength. I can remember who off hand, but put the call out!! They will respond.

anselm · Jan 20, 2011

THE_LED_MUSEUM has (access to) a lot of nice equipment, just read any of his reviews
and you'll see what I mean.

GreenBeam, I appreciate very much what you are doing, but I hope you don't get your
hopes too high for making a huge sale here.
To 90% of users in this forum, ~50$ is the most they've ever spent on a diode
(12x BluRay, 1W 445nm), and those diodes have alot of power.

I don't think everybody will be ready and willing to pay ~100$ for a "red" diode
that does ~200-300mw, there are the always popular LOC diodes off of 10$ sleds for that.
Sure it's a different kind of red, but remember, this is the "balloon popper" forum

D),
and many many of the members are more interested in raw power than anything else.

Sure there are many who like the beam, or are building a projector, but I honestly
don't think there are more than one or two dozen diodes to be sold here.....

At least in the short run.

I hope I am wrong though and you can offer a price that is interesting enough to
many members, not just the hardcore 15~20 members.

What's your Dream LASER Diode - IF it were affordable? *Grand Purchase Plan*

Of those listed - What's your Dream Laser Diode - if it was affordable?

635nm 300mW TO18 case (5.6mm)

635nm 500mw TO3 case

635nm 500mW C-mount

650nm 500mW TO3 case

650nm 1watt - TO3 case

650nm 1W C-mount

808nm 1W TO5 (9mm)

808nm 5W TO3 case

980nm 500mW TO5 (9mm)

980nm 5W C-mount

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What's your Dream LASER Diode - IF it were affordable? Grand Purchase Plan