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04-29-2015, 04:26 PM #1
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Soldering to case of 5.6mm laser diode?

Does anyone know if a laser diode can take the heat of soldering its 5.6mm case to a copper disk? The disk won't be too big, .5 inch dia. at 18 gauge. I see maximum storage temperatures specified on some of these diodes which makes me wonder if they can take the heat of soldering them that way, if that temperature is the limit.
.
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Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

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High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 04-29-2015 at 07:21 PM. Reason: Changed thread title a little tiny eany meany weenie bit

04-29-2015, 05:26 PM #2
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Re: Soldering to case of 5.6mm laser diode?

I wouldn't chance it. The die is attached to
the case with a low melt alloy. I recommend
soldering wire(s) to the copper disc first and
then attaching the diode mechanically.
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04-29-2015, 05:40 PM #3
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Pi R Squared
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Re: Soldering to case of 5.6mm laser diode?

I agree it sounds high risk. I assume this is a case + or a case - diode and that's why you want it soldered to the disk? Maybe you can just glue it to the disc and solder the case pin to the disk.

Alan
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04-29-2015, 05:44 PM #4
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Re: Soldering to case of 5.6mm laser diode?

OK, I wont try that. I can compression fit it but I thought soldering might be better

It's case negative/cathode, just wanted to solder it to give more stability, no real need to do that. I wanted to drill a hole in the copper disk only big enough for the leads to go through, the diode sitting on top, but I can do it another way, drill it just big enough for the cap of the diode to fit into and then compression fit the whole disk down on to the pill, sandwiching the diode between the disk and pill, the lip of the diode can preventing it from popping through the hole of the copper disk pushing it down on the surface of the pill which can have a hole for its leads to go through. I don't think the copper disk is deep enough for me to drill a hole to compress the diode into. However, if I were to try to do that, or find a thicker disk, how do you drill a flat hole? I am so newbie to such things, don't know a bit about milling metals.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 04-29-2015 at 05:53 PM.

04-29-2015, 07:58 PM #5
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Re: Soldering to case of 5.6mm laser diode?

You need a special tool called a spot face,
but I don't think they are available in the
sizes we need. The machinists are very
secretive, but I think they just grind
their own tools and do them on the
lathe/milling machine. It requires a drill
press at the very least.
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04-29-2015, 08:47 PM #6
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Re: Soldering to case of 5.6mm laser diode?

Look for counterbores like here McMaster-Carr Unfortunatly McMaster does not offer a right size. The closest are #5 and #6 but one is undersize, other oversize.
This one #5 from here KBC Tools & Machinery might do the job.
.22" *25.4 = 5.588 mm. Your machine and machining skills must be on top to have a nice fit. With a pure copper it is more challenging.
The pilot hole is a standard 1/8 drill or ~3.2 mm. It should be large enough for wires or a laser diode can.

Soldering a whole package will attract disasters - you probably will need a plumber's soldering torch to heat your plate and diode if using a standard solder.
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04-29-2015, 11:05 PM #7
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Re: Soldering to case of 5.6mm laser diode?

I have a 100W super sized soldering iron from the 1940's which is a match for any diode, I'm sure I can solder one down with it... won't work anymore, but it will be soldered. Thanks again guys.

Oh, lazeristasUVISIR, forgot to make a special mention of thanks for that info, I've already cut and paste it to a Word doc. for later when I order one. Don't know how well I will do, I better practice with a dummy slug and dead diode first. I have already purchased some diode removal tools from Flaminpyro and DTR.

Chris
__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 04-29-2015 at 11:17 PM.

04-29-2015, 11:09 PM #8
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Re: Soldering to case of 5.6mm laser diode?

Quote:
 Originally Posted by Alaskan I have a 100W super sized soldering iron from the 1940's which isn't a match for any diode, I'm sure I can solder one down with it... won't work anymore, but it will be soldered. Thanks again guys. Chris
Lol got any pics of it?
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04-29-2015, 11:23 PM #9
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Re: Soldering to case of 5.6mm laser diode?

Looks like this one, it's buried in my stuff too deep after my move back to Alaska:

Soldering Iron Vintage "American Beauty" American Electrical Heater Co 100W USA | eBay

I have one that is more like a hot poker on a handle too you heat with flame first, not electric. That one is probably from the early tube radio days.
__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

04-29-2015, 11:42 PM #10
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Re: Soldering to case of 5.6mm laser diode?

Quote:
 Originally Posted by Alaskan Looks like this one, it's buried in my stuff too deep after my move back to Alaska: Soldering Iron Vintage "American Beauty" American Electrical Heater Co 100W USA | eBay I have one that is more like a hot poker on a handle too you heat with flame first, not electric. That one is probably from the early tube radio days.
Properly engineered and built to last!
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Stay safe and keep our hobby alive! Click

405nm: S06J 12X Ehgemus custom host (700mw)
445nm: SF501B (2400mw)
445nm: WL Arctic S3 (1400mw+) - 1723mw peak
520nm: Custom Build - Ehgemus power coated special host + DTR NDG7475 (1400mw)
532nm: Jet Lasers Equality (500mw+) - 612mw peak
532nm: WL Evo - (100mw+)

532nm: Laser 303
589nm: DL Spartan (50mw)
635nm: 501B by Blord - (200mw+) - 275mw peak
650nm: Laser 303
650nm: Key chain 'cat toy' - (1mw)

04-30-2015, 02:17 AM #11
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Re: Soldering to case of 5.6mm laser diode?

Wow I have one just like this one in my storage container.

I think you will need more than 100W to do this job and I would not recommend soldering the laser diode either !

Jeff...

Quote:
 Originally Posted by Alaskan Looks like this one, it's buried in my stuff too deep after my move back to Alaska: Soldering Iron Vintage "American Beauty" American Electrical Heater Co 100W USA | eBay I have one that is more like a hot poker on a handle too you heat with flame first, not electric. That one is probably from the early tube radio days.
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04-30-2015, 03:31 AM #12
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Re: Soldering to case of 5.6mm laser diode?

This instead of solder? The 1/2 inch copper disk is expendable if the diode later fails, I'd just build another one:

Arctic Silver ASTA 7g Premium Silver Thermal Adhesive Epoxy 2 PC Set 7 Grams | eBay
__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

04-30-2015, 12:09 PM #13
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Re: Soldering to case of 5.6mm laser diode?

Yes, solder the case pin first with the
diode hanging on another heatsink. The
whole copper disk will need to be at
soldering temperature. Use flux. Then
when everything has cooled, stick the diode
down with arctic silver or arctic alumina.
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04-30-2015, 05:41 PM #14
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Re: Soldering to case of 5.6mm laser diode?

I just wanted to solder the diode case down on top of a flat disk with the wires going through a hole in the middle below it. The wires will be soldered last, my only concern is will the small 5.6mm single mode diode take the high temperature of soldering without destroying it, using the minimum heat required with relatively low temperature melting solder. So far, all of the feed back I am receiving is not to risk it, but I'd be interested in knowing if anyone has been able to do so with a diode like the PL520.

Edit:

I decided to do this differently and instead, drill a hole in the aluminum pill and tap it to accept the threads of the copper half of a DTR module. I believe I found the correct dimensions through a forum search from a post back in 2013 but now I can't find the thread However, I saved a print out of what I did find, can someone take a look at this and tell me if this is correct and what hole size I need to drill to be able to tap my pill for a M11 X 0.5 ? I know the hole must be slightly smaller, but not sure how much smaller.

EDIT: Nevermind on the above question, I completely screwed up my pill drilling the hole off center. I used a 10.5mm drill bit, per some advice I found on a web site.

__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.

Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 05-02-2015 at 04:59 AM.

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