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Old 09-12-2015, 08:14 PM #1
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Default fiber coupling laser diodes directly.

would it be possible to fiber couple a laser diode by using optical glue to literally glue an optical fiber to the window of a laser diode? i believe it would be impossible for an open can diode, but i have no reason to believe this wont work for a canned diode, and proper alignment of the fibre on the diodes window.

i don't think anyone has ever tried this, but what do you all think? also, would there be any concern about a single mode vs multimode laser, since a single mode laser would likely have a smaller spot size on the window or would it not matter?


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Old 10-03-2015, 09:54 PM #2
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Default Re: fiber coupling laser diodes directly.

bump!
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638nm HL63193MG @1.2A, S1 lens, 501B, 860mW
532nm 60-160mW HL from laserbtb
515nm 29mw HL-515 laserbtb
488nm JSDU 2214-20SLMD 20mW Argon-Ion
445nm 1300mw
405nm BDR-209 16x @ 0.6A, S1 lens, 501B LED'ed

Laserbee A 2W LPM 1mw resolution.

I have a good basic understanding of DPSS and gas lasers, so if you have questions, feel free to PM me! I don't know anything about electronics though.
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Old 10-04-2015, 01:37 AM #3
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Default Re: fiber coupling laser diodes directly.

If you do, better have it perfectly aligned! I don't know what the refraction index of the glue would be, if it were between the diode and the window though. Off hand, I don't think it would be a good idea to glue something directly upon the window, perhaps the edges of the can might be ok but glue gives off vapors which would likely coat the window and or fiber.
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Old 10-04-2015, 01:40 AM #4
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Default Re: fiber coupling laser diodes directly.

Quote:
Originally Posted by Alaskan View Post
If you do, better have it perfectly aligned! I don't know what the refraction index of the glue would be, if it were between the diode and the window though. Off hand, I don't think it would be a good idea to glue something directly upon the window, perhaps the edges of the can might be ok but glue gives off vapors which would likely coat the window and or fiber.
hmmm... how are laser diodes normally fibre coupled?
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638nm HL63193MG @1.2A, S1 lens, 501B, 860mW
532nm 60-160mW HL from laserbtb
515nm 29mw HL-515 laserbtb
488nm JSDU 2214-20SLMD 20mW Argon-Ion
445nm 1300mw
405nm BDR-209 16x @ 0.6A, S1 lens, 501B LED'ed

Laserbee A 2W LPM 1mw resolution.

I have a good basic understanding of DPSS and gas lasers, so if you have questions, feel free to PM me! I don't know anything about electronics though.
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Old 10-04-2015, 03:53 AM #5
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Default Re: fiber coupling laser diodes directly.

I'm too new to lasers, only know a little about laser diodes and pointers, although there are some professionals in the group who might be able to lend more in depth advice. Still, here is something I've been eyeing on ebay for a long time wondering about this question too.

Point Source Laser TO Fiber Optical Optic Coupler I Flex Kineflex | eBay
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To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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Old 10-04-2015, 10:42 AM #6
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Default Re: fiber coupling laser diodes directly.

Quote:
Originally Posted by micheal rosen View Post
hmmm... how are laser diodes normally fibre coupled?
Some are direct coupled like in the coherent CCP diode packages , 19 fibres for 19 emitters .

Some are coupled with the use of a lens - mostly with single diodes , which is the case for a few 2W diodes I had that had FAC and then a lens after to focused it into the fibre


I think you'll find for direct coupling the window would have to be removed , the fibre is physically very close to the dies face and the fibre core has to be matched the die emitter size as well
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Last edited by DashApple; 10-04-2015 at 10:47 AM.
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