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ArcticMyst Security by Avery

Photos of an DVD-RW 650nm laser diode, seen OFF-ON under a microscope.

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Hey guys,

Today is the turn to an laser diode very different to the already ones photographed earlier in another of my threads.

The main differences with the Mitsubishi red LD photographed in my other thread are:

This one have much better beam profile.

The shape of the upper substrate is very particular (is not rectangular or square as in other diodes).

No leaks on the front, left, and right side as the diodes photographed before (this one only lasing through a very small window in the front and in the back).

The other main differences are at the level of measures, but I can not compare them because the other red laser diodes I have not taken the dimensions yet.

For those who want to see the differences with the other red laser diodes under a microscope here's the link.

And also for those who want, here is the link to the 405nm violet laser diode, also under a microscope.


The oficial data of this LD are unknown, it was extracted from an DVD-RW.

The limited data I have are as follow:


Brand and model of the DVD: LG GSA-4120B

Wavelength: 650nm

Package: Ø 5.6mm, Closed can.

Case negative.


------------------------------------------------------------------------------------------------------


The first 2 photos is for you can compare the profile of the beam of the Mitsubishi LD and this one.

0001.jpg



001.jpg



The next 4 photos overview of the LD.

01.jpg



02.jpg



03.jpg



04.jpg



In the next 3 photos you can see the dimensions of different parts of the LD.

00005.jpg



0005.jpg



005.jpg



In the next photos you can see the LD, from various angles and with various magnifications.
Also you can appreciate that this LD does not have side leakage as the other LD's.

05.jpg



06.jpg



07.jpg



08.jpg



11.jpg



12.jpg



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In the 3 photos below you will appreciate something already seen in the 405nm LD,
(sure someone already saw this) you know what I mean?


19.jpg



20.jpg



021.jpg



In the next 6 photos, LD view from various angles but with more magnification.

21.jpg



22.jpg



25.jpg



26.jpg



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31.jpg



In the last photos, you can easily see the curious shape of the upper substrate,
and the little window where the laser beam exits.


32.jpg



33.jpg



34.jpg



35.jpg



36.jpg


End :)
 
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Blord

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Looking very good ! +1
How do you measure the dimension ? Is that build-in software of the microscope ?
 
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Thanks to both, guys :beer:

@Blord: Well, I have to do the calibration manually (tedious), then is semi automatic, that is, I draw the part I want to measure and the software gives me the result.

Yea, the material at my disposal is not very good haha.
 
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These are some very nice photos.

I wonder why the crystal isn't straight cut, it's like it's leaned to the side.
 

AUS

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Great work! I love these it shows whats going on at a level we normally cant see. Well done!
 
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Would LOVE a book with new info and pictures over diodes like these. but for now these amazing pictures will due:beer:
 
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Great Photo's again. It's neat how the main body of the diode when viewed that close looks like a block of lead, rough with a plating over it.

Thanks for sharing the photo's!:beer:
 

ped

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See if you can get a shot of it lasing at high power, and take a top down photo of it :)
 

sinner

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They really do place a coding letter on each and every laser diode, yet they produce hundreds of thousands of these small light emitting creatures!! :D Thanks to Piferal now we're much closer to the laser diodes !! haha

@PED: yup i do want to see that one and one LED'ed too.. like what changes happens if the diode get's led'ed if you could do that at your ease..
Cheers :beer: awesome pictures as always Juan!!
 
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These are some very nice photos.

I wonder why the crystal isn't straight cut, it's like it's leaned to the side.

Thanks Eud.

Yes, it's curious, but all the red laser diodes that I photographed have the upper Substrate slightly tilted.

Is not the case of the 405nm laser diode.

Great work! I love these it shows whats going on at a level we normally cant see. Well done!

Thanks AUS, Yes, that's my intention to show to all they want, what you do not normally see at a glance.

Would LOVE a book with new info and pictures over diodes like these. but for now these amazing pictures will due:beer:

Thanks TH,

Well, we have the photos, now just we need the book hahaha

Great Photo's again. It's neat how the main body of the diode when viewed that close looks like a block of lead, rough with a plating over it.

Thanks for sharing the photo's!:beer:

Yes, I like also as depending on the angle of incidence of light, the different layers change of color.

No, thank to you all, thankful that you like my humble work.

Superb photo's +1

See if you can get a shot of it lasing at high power, and take a top down photo of it :)

Thanks so much Ped :beer:

Yeeeeaaa I see:can: What you want is this way maybe I break the microscope :cryyy: hahaha just kidding Ped :p :p :crackup:.

No problem, I will try to do what you say, if possible :beer:

They really do place a coding letter on each and every laser diode, yet they produce hundreds of thousands of these small light emitting creatures!! :D Thanks to Piferal now we're much closer to the laser diodes !! haha

@PED: yup i do want to see that one and one LED'ed too.. like what changes happens if the diode get's led'ed if you could do that at your ease..
Cheers :beer: awesome pictures as always Juan!!

Thanks sinner ;)

Wow, another person that would break my microscope, hahaha kidding again :p :p no worries :D

I have no laser diodes (led) damaged, I am very careful :D :na:
 
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I'm always amazed by clear closeup macro photos...
Its like going into another world that you can't really
see with your naked eyes...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
 
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Well done Juan. Its true, its like another world.

Something in me makes me want to pluck all the gold wires off. :eg:
 
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I'm always amazed by clear closeup macro photos...
Its like going into another world that you can't really
see with your naked eyes...


Jerry

Yes, it's another world, and I love.

From childhood I loved looking through the transparent window of some ceramic EPROM, and others memory chips,
and also I broke many microchips, with the same intention, haha :eg: :angel:

Here still I have some of those chips with transparent window.

Well done Juan. Its true, its like another world.

Something in me makes me want to pluck all the gold wires off. :eg:

Thanks mate :beer:

Come on Mark, pluck all the gold wires off :tsk: you are a very bad boy :eg: hahaha :p :p :na:
 

Arayan

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Epic pics Juan :beer: I love both lasers and the photomicrographs (since I'm a microbiologist) :D

Is it possible to take some photos of beams?? I'm just curious :p
 




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