Old 04-18-2010, 09:37 AM #1
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Default 500mW Red Diode

Hey I haven't even tried to look into price or availability yet...

But can anybody tell from the data sheet if this diode will produce a dot? (single mode)

Because we don't want a multimode bar or a line...
http://www.sony.net/Products/SC-HP/c...f/sld1332v.pdf

http://www.sony.net/Products/SC-HP/d...a/a6808675.pdf

Some discussion here:
http://www.holographyforum.org/phpBB...hp?f=13&t=2321


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Old 04-18-2010, 09:48 AM #2
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Default Re: 500mW Red Diode

Judging from the power, and the last document in the second .pdf, it appears to be a 9mm multi-mode, as most production diodes that achieve 500mW without being pushed are, unfortunately for us, multi-mode. Sorry Jayrob, but it looks like it'd take a lot of corrective optics to get anything resembling a dot from these.
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Old 04-18-2010, 09:56 AM #3
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Default Re: 500mW Red Diode

Please explain what it is in the data sheet that tells you this??

Is it the 'radiation angel'?

I'm in search of a 500mW red dot...

Maybe a c-mount? Any input?
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Old 04-18-2010, 12:19 PM #4
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Default Re: 500mW Red Diode

Hey Jay...
I thought I would add to your confusion...

From what I gather from the info you provided... (I may be wrong)

1) it was designed to be used in Burners... I can't see a multi-mode LD for that
purpose.

2) it doesn't mention a FAC lens.. which would make a multi-mode LD much
it easier to focus for burning

3) the beam angle is only 15 Deg by 30 Degrees... a multi-mode would have
a greater difference in angles... IMO

BTW... do you have a price on that LD...


Jerry
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Old 04-18-2010, 12:54 PM #5
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Default Re: 500mW Red Diode

From a quick look at 3am, it looks like single transverse mode and multiple lateral modes.

The waveguide is 100um wide, which is way more than enough for multiple modes, and Fig. 3 confirms this: the lateral nearfield looks pretty awful, where the transverse near field looks fine.
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Old 04-18-2010, 01:10 PM #6
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Default Re: 500mW Red Diode

So... what would you say it is... Multi-Mode or Single...

Is he going to get this... ----- or this... .

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Old 04-18-2010, 05:16 PM #7
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Default Re: 500mW Red Diode

Really appreciate your input guys...

There has got to be a diode out there somewhere that will give us a 500mW red dot!

Anybody know?

Even if it's a c-mount, I can make a heatsink to mount in onto, and then thread it for my 650-G-1. I've got the bottoming tap now... (than I didn't have before)
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Old 04-19-2010, 07:00 PM #8
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Default Re: 500mW Red Diode

Hey Jay....
I stumbled across these ones today.....

300mw 650nm laser diode C-mount package on eBay.ca (item 130379797397 end time 01-May-10 10:50:16 EDT)

500mw 650nm laser diode C-mount package on eBay.ca (item 130379797381 end time 01-May-10 10:50:12 EDT)

1000mw 650nm laser diode C-mount /To-3 package on eBay.ca (item 130379797408 end time 01-May-10 10:50:17 EDT)


Jerry
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Old 04-19-2010, 08:20 PM #9
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Default Re: 500mW Red Diode

Hmmm... I would try the 500mW one if I knew for sure that it would produce a dot and not a line...

I wonder if this information from the specs tells us anything??:

Beam divergency(deg):42x10
Emitting area(μm):150x1
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Old 04-20-2010, 10:28 PM #10
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Default Re: 500mW Red Diode

Must it be one diode?
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Old 04-20-2010, 10:35 PM #11
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Default Re: 500mW Red Diode

It sure would be nice if it was one! Maybe it isn't available yet??

I just figured that there must be a red that can give us 500mW's in a hand held since we are surpassing that with blu-ray builds...

But I guess if it doesn't exist, then I'll have to scratch that plan...
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Old 04-20-2010, 10:46 PM #12
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Default Re: 500mW Red Diode

nah.. unfortunately for red fanatics it's fairly unlikely that red diode technology will ever match blue (GaN) diodes in terms of singlemode output power. The diodes Jerry linked to are all multimode, as are pretty much all red diodes over 300mW rated power.
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Old 04-23-2010, 06:07 AM #13
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Default Re: 500mW Red Diode

Jayrob;

There are some flat Red burner diodes rated @ 400mw pulse power.

I saw some graphs where the manufacturer ran them at 600ma for 500 hours.

Those are the ones I was looking for in all my flat Red diode testing.

They are out there somewhere ....

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Old 04-23-2010, 06:16 AM #14
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Default Re: 500mW Red Diode

Guess we have to just keep looking...

Those flat red diodes from the LG 8X drives have a line off to one side with a spot...
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Old 05-02-2010, 12:33 PM #15
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Default Re: 500mW Red Diode

Quote:
Originally Posted by jayrob View Post
Hey I haven't even tried to look into price or availability yet...

But can anybody tell from the data sheet if this diode will produce a dot? (single mode)

Because we don't want a multimode bar or a line...
http://www.sony.net/Products/SC-HP/c...f/sld1332v.pdf

http://www.sony.net/Products/SC-HP/d...a/a6808675.pdf

Some discussion here:
Holography Forum • View topic - New Sony SLD1332V Laser Diode
Laser Diode Short & Fast Axis
Laser diodes inherently emit light in an elipse. In order to create an actual spot, an anamorphic prism pair needs to be mounted after and inline with the beam. These optics will slow down the fast axis and match with slow axis making what looks like a spot (more like a square) Blue Sky Research, A company I worked for a bit in the 90's, actually cut the can off 9mm laser diodes and placed a very small micro cylindrical lens right above the laser facet and produced the same effect. They may still be around. Just my 2 cents....
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Old 05-03-2010, 01:09 AM #16
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Default Re: 500mW Red Diode

I have...well 2 thoughts. Call them dumb...call them inginuitive, but here they are.

1: Set-up 2-3 pulsed diodes so that they 'blink' inbetween the other 'blinks' in such a way, that it looks solid.

2: Fit a host that can hold 2-3 of your 650-G-1 lenses, so that it adds 31%, then another, then another. I don't know if it's possible, but I'm just doing my best >.<
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