Old 05-14-2012, 01:32 PM #1
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Default Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Hey guys,

I asked to Dave and we agree that it is better to open a new thread for each new laser diode,
for not to overcharge a thread with multiple diodes, and thus also put links to my other threads.


For those who want, HERE you have the Link to my other thread with an IR (808nm) and one red (650nm) laser diode.

Update may 23: Here you have the link to my new thread of an 650nm laser diode.

Said that, I would add that in this new phase will also try to take the dimensions on certain parts of the laser diode
that I will include from now in my threads, to provide more information and make it more interesting for everyone.

(The dimensions are as accurate as possible, with the material at my disposal)

I hope this photos serve to show a somewhat different manner these laser diodes that we manipulate daily.


Now the characteristics of the laser diode in question:

Brand: Sanyo
wavelength: 405nm
Output Power: 20mW
Package: φ5.6mm, with cap


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

Chip of the diode in the foreground, the photodiode in the background.






Photodiode of the laser diode in the foreground, and the chip in the background.






Overview of the photodiode and chip.






In the next 2 photos, overhead view of the complete laser diode, including the photodiode.






Several photos with the chip from the front side.










In the next photo the size of the bug




Chip seen from the front with very little power to assess the beam exit window.




Some photos from various angles of the chip.






















In this follows the photodiode can be seen from another angle where you can perceive the thickness.




In this next one you can see the photodiode and its dimensions.




In these 2 photos that follow now, you may discover something that I saw, and I was very surprised to find
it accidentally at this place, and do not expect to find this here with these dimensions so small also.
You see what I mean?








End



Last edited by piferal; 07-12-2012 at 04:04 PM.
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Old 05-14-2012, 01:45 PM #2
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

These are Amazing photos!! Thank you very much for starting these threads. It's also great to see the diode while lasing.

It's hard to believe all that is made into something you can't see with the naked eye and produces such a dramatic effect.
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Old 05-14-2012, 01:46 PM #3
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Truley awesome... The lasing area looks smaller than the red ones. Interesting to see the (laser etched?) figures on the crystal too!
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Old 05-14-2012, 01:50 PM #4
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Some more amazing pictures

Can you read the codes? Or are they far too small? It'd be interesting to know what they are for.

Lase
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Old 05-14-2012, 01:51 PM #5
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Good pictures. The components looks very different to the 445nm diode/LPC815 !
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Old 05-14-2012, 03:34 PM #6
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

amazing photos! catch a lasing laser diode! Great!

Would be interesting to see the exact differences between these "big" blue ones and the "tiny" blue ray diode...

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Old 05-14-2012, 07:12 PM #7
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

First, I want to thank to all for your kind comments.


Quote:
Originally Posted by 532 with Envy View Post
These are Amazing photos!! Thank you very much for starting these threads. It's also great to see the diode while lasing.

It's hard to believe all that is made into something you can't see with the naked eye and produces such a dramatic effect.
Thanks, I will continue to work with more diodes haha

Yes, it's amazing that something so small is capable of producing an intense, and concentrated light.

Quote:
Originally Posted by AUS View Post
Truley awesome... The lasing area looks smaller than the red ones. Interesting to see the (laser etched?) figures on the crystal too!
From now, in the next diodes on we can compare the sizes of the lasing area and others.

Although I will try to measure also the laser diodes that I put in the other thread, to compare.

Quote:
Originally Posted by Lase View Post
Some more amazing pictures

Can you read the codes? Or are they far too small? It'd be interesting to know what they are for.

Lase
Well I said it's a code, but do not know exactly what it is.

What you can see is that the first looks like a (J), then a (I) or an (1), then a (o) or an (0) and the last one an (T).

Quote:
Originally Posted by Blord View Post
Good pictures. The components looks very different to the 445nm diode/LPC815 !
Yes, at least compared to the IR laser diode, and the 2 models of red 650nm that I put in the other thread, are very different.

Quote:
Originally Posted by mojo_1234 View Post
amazing photos! catch a lasing laser diode! Great!

Would be interesting to see the exact differences between these "big" blue ones and the "tiny" blue ray diode...

Yes, gradually, (gives a lot of work haha, but I do not care), I will take pictures of all the laser diodes that I can and have, to see the differences.
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Old 05-14-2012, 08:00 PM #8
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Woah, I had no idea that 405nm emitting crystal is actually transparent - that's so cool.

Ehh, I need to spread reputation around blah blah...

Anyway,

Good job!
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Old 05-14-2012, 08:43 PM #9
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Yeah I allways think photo's like this should include images of the diode lasing so we can see the emission area.

Top work.
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Old 05-14-2012, 08:57 PM #10
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

How do they assemble diodes? I'd never wondered before.

I'm familiar with the photolithography process for IC's.

And the one part I do get is the needle that draws the tiny gold wires to bridge the components.

What about the rest? Is it super teeny and accurate versions of the "pick n place" robot? I found this video, but save for the wire drawing pin, the other parts of this (admittedly more complicated diode, which appears to have several monitoring or modulation functions within it...) just drop down magically without explanation.

http://www.youtube.com/watch?feature...&v=w6MLowh-ZO8

And in these wonderful macro photographs, I can see the pool of solder under the actual die there...

Last edited by AJ_Dual; 05-14-2012 at 08:57 PM.
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Old 05-14-2012, 09:10 PM #11
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Very interesting thread, thanks for sharing these amazing pics, Juan
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Old 05-14-2012, 10:39 PM #12
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Quote:
Originally Posted by Eudaimonium View Post
Woah, I had no idea that 405nm emitting crystal is actually transparent - that's so cool.

Ehh, I need to spread reputation around blah blah...

Anyway,

Good job!
Yes, Is the Gallium Nitride Substrate.

Thanks for the comment Eud

And not worry about the (...around blah blah ...) hahaha


Quote:
Originally Posted by ped View Post
Yeah I allways think photo's like this should include images of the diode lasing so we can see the emission area.

Top work.
Thanks Ped

Quote:
Originally Posted by AJ_Dual View Post
How do they assemble diodes? I'd never wondered before.

I'm familiar with the photolithography process for IC's.

And the one part I do get is the needle that draws the tiny gold wires to bridge the components.

What about the rest? Is it super teeny and accurate versions of the "pick n place" robot? I found this video, but save for the wire drawing pin, the other parts of this (admittedly more complicated diode, which appears to have several monitoring or modulation functions within it...) just drop down magically without explanation.

And in these wonderful macro photographs, I can see the pool of solder under the actual die there...
Thanks for the coment

Exciting world of electronics manufacturing.

I wish I could visit a factory of laser diodes, with an explanation included

Quote:
Originally Posted by Arayan View Post
Very interesting thread, thanks for sharing these amazing pics, Juan
Thanks for the compliment, Federico

It is always good to share
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Old 05-14-2012, 11:05 PM #13
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

piferal;

Very nice photos of the LD.

Now we need some "chip detectives" to figure out who actually made these diodes.

LarryDFW
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Old 05-15-2012, 09:16 AM #14
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Quote:
Originally Posted by LarryDFW View Post
piferal;

Very nice photos of the LD.

Now we need some "chip detectives" to figure out who actually made these diodes.

LarryDFW
Thanks Larry,

Yes, the problem is for now I don't have any defective chip.

But when I have, I will also take pictures of him, no problem with that
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Old 05-16-2012, 08:49 AM #15
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

I love these Kind of Photos. Dint Expect a Photo Diode on a 20mW diode to be honest. The Transparent of the Die is Awesome.!

Keep them coming please. Seriously nice Work>

I Must of Repped you not to long ago. Wont let me know.Err
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Old 05-16-2012, 10:06 AM #16
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Default Re: Photos of an 405nm laser diode, with photodiode, seen OFF-ON under a microscope

Quote:
Originally Posted by lazeerer View Post
I love these Kind of Photos. Dint Expect a Photo Diode on a 20mW diode to be honest. The Transparent of the Die is Awesome.!

Keep them coming please. Seriously nice Work>

I Must of Repped you not to long ago. Wont let me know.Err
I appreciate your comments Angelos, thanks

Well, supposedly is 20 mW, at least I bought it announced at that power.

Yes, I love too how it looks the part of the transparent die, and when is lasing, the whole surface looks purple, very nice.

I will continue taking pictures for you all, of the diodes to fall into my hands.

Do not worry about the REP Angelos, I thank you anyway

Last edited by piferal; 05-19-2012 at 11:26 AM.
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