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Help with I.D.'ing Laser Diode

SysEng

SysEng

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Hello Everyone,

I am in need of assistance identifying a laser diode I removed from a optical writer. it has three solder points in the back and looks like this:

dscf0749q.th.jpg
[/URL] ImageShack.us[/IMG]

anyone with experience working with this type please let me know the following:

terminal leads(which is which?)

voltage & wattage rating

usual life span

I appreciate it greatly, Thanks!


SysEng
 
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qumefox

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Can't tell anything from a blurry pic. Plus it's usually impossible to exactly identify a diode just from the diode itself anyway.

You'd get more information by telling us the model number of the drive it came out of.
 
123splat

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It looks like some 7-10mW reds I've pulled. Fun to play with, but not too usefull. It'll take 20-50mA @3V, without a sink, for short periods (15-20 sec.s). Looking at the back of the of the case 3 pins (1 @ 12 o'clock, 2 @ 3 o'clock, & 3 @ 6 o'clock) pin 1 = +, pin 2 = GND, pin 3 = photodiode. You can, working slowly, further extract it from the 'sink' that it is in, and put the TO-556 into an AXIZ module, but not really worth it. Good to practice with, will give you a dot, but no visible beam.
 
SysEng

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Why aren't they 'too useful'?

Can you please give me a practical list of applications in industry?


*btw

This particular diode has rectangular base, so the clock-like terminal arrangements are not there. The terminals look like:
|X |
| X |
| X|
 
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Ramsey_innovations

Ramsey_innovations

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Package type is TO-18 (5.56mm) appears to be Infrared diode IMHO. Many Ir diodes from disc burners have that extended heat sink with some optics glued to the end.
It would be helpful to post a pic of the optical window so we can see the AR coating's color and further determine the type of diode.
Be cautious about attempting to power it up though, if it's IR then it's case positive, if its red it's case negative. So needless to say you don't want to reverse polarity. Also don't be fooled by IR, it would appear to be VERY dim red when in actuality it is capable of severely damaging your eye sight. Take Caution, wear goggles or use the view finder of a cam if you do attempt to power up!!!
 
chipdouglas

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qumefox said:
Can't tell anything from a blurry pic. Plus it's usually impossible to exactly identify a diode just from the diode itself anyway.

You'd get more information by telling us the model number of the drive it came out of.
Click to expand...

SysEng said:
Why aren't they 'too useful'?

Can you please give me a practical list of applications in industry?


*btw

This particular diode has rectangular base, so the clock-like terminal arrangements are not there. The terminals look like:
|X |
| X |
| X|
Click to expand...


ummmm because it's blurry lol. how can we identify something we can't see?

it also looks like it is still in the heat sink. that also hinders the identification process.

michael.
 
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SysEng

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Thanks Ramsey_innovations,

Are these capable of burning?

Do you know of their lifespan/life expectancy? How many cycles?

What of the spectrum?

Will do on the window, and will report back.


I like the name btw.
 
SysEng

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yes they are in a diagonal forward slash depending on how you hold the unit.
 
SysEng

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I apologize for I see now that every supplier of diodes has their own design situated in a standard heatsink, thus making i.d.ing virtually impossible to make via visual inspection. I understand now why you go by make, model # of the optical drive.

Does anyone here have a list of make, model# of optical writers and their corresponding optical packages?
 
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Ramsey_innovations

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Ok, I'm going to need a better pic to figure this out for sure. Preferably one of the window and one of the pins.
 
SysEng

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Make: Sony

Model: DVR-115D

You will need to excuse my photography skills for I am only a Systems Engineer, and we outsource all of our photography locally to photographers.

I will scan it momentarily.
 
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SysEng

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no it doesn't. I will scan it shortly for you. Please standby. Thanks again Ramsey_innovations!
 
qumefox

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Hmm. all the hits I get for DVR-115D say pioneer not sony. But regardless if it was a 20x burner the 660nm diode will be capable of 200-250mW. However it seems like it's one of the new flat package diodes instead of the usual TO18. So actually using the diode may prove difficult.
 
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