Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Off, and on, 635nm laser diode with photodiode under the microscope.

Joined
Apr 5, 2011
Messages
1,161
Points
0
Hey guys,

Today is the turn to an 635nm laser diode with photodiode and with 7mW optical power.

I was surprised by the beam profile, as we shall see, is very stretched.

Also say that except the LD extracted from the DVD, all the other LD's emit light from the sides, left and right, this one also.

And also compared to other red laser diodes, the longitudinal wave guide of this laser diode is much shorter,
only 0,30mm, the Mitsubishi is 2.17mm (huge difference).

In this diode have not found marks or references in the chip, as found in others laser diodes photographed before.

Also unlike the reds at 650nm, in this one the case is positive.

For those who want to see the differences or compare my others red LD's with this one HERE and HERE you have the links.

And also for those who want, HERE also you have the link to one 405nm violet laser diode photographed some days ago.

Now the data I have, are as follow:

Brand and model unknown.

Optical output: 7mW

Operating current: 20mA

Operating voltage: 2.2V

Wavelength: 635nm

Package: Ø 5.6mm, Closed can.

Case positive.


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


The first 3 photos is for you can compare the profile of the beam of the LD from Mitsubishi, the LD extracted
from and DVD, and this one, (These 3 diodes have a beam profile very different from one to other.)


Also you can see quite well in the first photo, the typical something orange color of this wavelength.

0101.jpg



0001.jpg



001.jpg



In the next 12 photos general overview of the LD from various angles.

002.jpg


003.jpg


004.jpg


005.jpg


006.jpg


007.jpg


008.jpg


009.jpg


010.jpg


011.jpg


012.jpg


013.jpg



Now different views and angles, but more closely.

017.jpg


018.jpg


021.jpg


022.jpg


031.jpg


032.jpg


033.jpg


034.jpg


036.jpg


037.jpg



As shown in this picture, and as with the red laser diodes to date, the upper substrate is tilted.

040.jpg


041.jpg


044.jpg


045.jpg



The photodiode and its dimensions.

046.jpg


047.jpg


048.jpg


049.jpg



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

050.jpg


051.jpg


052.jpg



End :)
 





jakeGT

0
Joined
Oct 29, 2010
Messages
3,532
Points
0
Once again, it is only astonishing to see how these tiny devices can produce big beautiful beams of light.

It's good to see exactly what your working with! :beer:
 

sinner

0
Joined
Oct 27, 2011
Messages
2,565
Points
83
Truly amazing how this all works, the emitting area is so sooo tiny in these, yet the huge amount of light that comes out.. just super awesome!
Thanks for sharing the most amazing pictures as always juan! :beer:
 

ped

0
Joined
Nov 25, 2008
Messages
4,889
Points
113
Superb, if you have any diodes kicking round that you could live without, maybe you could overdrive it to the point of death or LED , and photograph the damage?
 
Joined
Apr 5, 2011
Messages
1,161
Points
0
First, thank you all for the comments, I appreciate it :beer:

@ped: I can not spoil something intentionally, it is against my nature haha,
but maybe I will shortly have some for take photos, for you all, but for now I can not say more.

@eytyxhs: No problem, when I have one in my hands, I will done, for sure.
 
Joined
Nov 4, 2011
Messages
801
Points
28
Hey Juan more great macro shots. Keep up the awesome work:beer:
 

AUS

0
Joined
Apr 12, 2012
Messages
565
Points
28
Very Cool, as always!
How do you take the photos with the diode on without overexposing it? Or is it just at very low power?
 
Joined
Aug 24, 2010
Messages
1,866
Points
48
Fantastic work again Juan, thanks for the heads up.:kewlpics: :beer:
 
Joined
Apr 5, 2011
Messages
1,161
Points
0
Thanks again to everyone for your kind words, and also glad you like these photos, anyway are for you all :beer:

@AUS: Yes, these microscope photos is taken with little power, because otherwise the camera will saturate
and will not see anything, and put filters is not an option for many reasons (too long to explain).
 




Top