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Old 08-06-2017, 09:04 PM #625
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Default Re: 505nm and 480nm diode RESULTS

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Originally Posted by RA_pierce View Post
Hi!
I'm glad to hear it. Was it the ~1.5W 445 that I built for you?
Did you get a chance to put it on a power meter? Back then, all I had was a 1W Laserbee meter.

And it's good to hear Flaminpyro is still active. I'm trying to plan another chrome pen (with one of the "505" diodes - though 470 would be ideal) and I think I'll need another one of those slick stainless steel focus adapters.

No, this one wasn't made for me, if I remember, it was the last of a couple that you were selling. You said that you thought it was 1+ Watt but couldn't be sure; I did get a chance to check it, and it did 1,287mW with the batteries as I received, and with a full charge it output 1,389mW!

Yeah, Jeff's still around occasionally, not too often though. I had tried to PM him with no luck, and ended up sending him an email which he answered right away.
I ordered some of his great solder flux while he is still selling it, and tried to pick up some 16.8/17mm battery boards also, but he's out of those for now.


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Old 08-06-2017, 09:29 PM #626
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Default Re: 505nm and 480nm diode RESULTS

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Originally Posted by paul1598419 View Post
Yes, and the diffraction grating has been etched into the diode's front facing emitter in some diodes to tune the line width to a very narrow spectral response. Of course you lose the ability to tune these externally if my understanding is correct.
The grating is etched directly into the diode itself (in the diodes gain medium to be more precise) or the grating is located at the rear facet. The first diode laser is called DFB (distributed feedback laser) and the second one DBR (distributed Bragg reflector laser). Etching gratings on the facet comes with the problem of a very high reflectivity of the grating that is based on the same semi-conductor material as the diode. So almost no output will be available.

Attaching a grating from another material that transmits most of the light is possible and is done a lot nowadays.

In all cases the tuning is only possible by changing the temperature like you already pointed out.

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Old 08-06-2017, 09:41 PM #627
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Default Re: 505nm and 480nm diode RESULTS

Yes, now that you said that I remember it like it was yesterday. It has been awhile since I spent time researching these.
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Old 08-10-2017, 08:08 PM #628
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Default Re: 505nm and 480nm diode RESULTS

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Originally Posted by ZRaffleticket View Post
Good news everyone - the odicforce page lists a driver (the one I bought) that looks identical to the ebay listing. They say 3-5V input

Variable Boost Driver Board for 515nm and 520nm Green Laser Diodes - OdicForce
Quote:
Originally Posted by paul1598419 View Post
That looks identical to the one I have coming from China for $7.98. If it is the same one, it is far cheaper from the Chinese. I know BowtieGuy found a linear driver that is made for a case positive diode. I looked at it and it looks perfect for use with the case positive 505nm diodes.
Ordered a few drivers from this seller to test out, including a couple of the 515-520nm drivers. Im in the EU so postage should be reasonably quick
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Old 08-10-2017, 08:16 PM #629
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Default Re: 505nm and 480nm diode RESULTS

Let us know what you find out. I am trying to keep this information posted for all to see.
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Old 08-15-2017, 04:12 AM #630
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Default Re: 505nm and 480nm diode RESULTS

If I can just find a driver for the 505nm then I'll be good to go. Let us know how they work out for you.
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Old 08-15-2017, 04:47 AM #631
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Default Re: 505nm and 480nm diode RESULTS

Which of the three 505nm diodes do you have, Joey? If it is the SB1473N91 you can drive it with a Nano Boost driver if you want to drive it at 275 mA. If you have the SB1573N91, it is case positive and you'll need the linear driver BowtieGuy is using, but he has the link for it. If it is the SB147EC91, it is a 510nm diode. I have one of the boost drivers coming from China that is supposed to be able to drive a 520nm diode up to 120 mW, but I won't know anything about it until it gets here.
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Old 08-15-2017, 02:14 PM #632
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by paul1598419 View Post
Which of the three 505nm diodes do you have, Joey? If it is the SB1473N91 you can drive it with a Nano Boost driver if you want to drive it at 275 mA. If you have the SB1573N91, it is case positive and you'll need the linear driver BowtieGuy is using, but he has the link for it. If it is the SB147EC91, it is a 510nm diode. I have one of the boost drivers coming from China that is supposed to be able to drive a 520nm diode up to 120 mW, but I won't know anything about it until it gets here.
I have the GH05035A2G, or at least that's the model the seller said.
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Old 08-15-2017, 06:32 PM #633
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Default Re: 505nm and 480nm diode RESULTS

I'm sorry, Joey. I meant the micro-printing around the diode's window. You should find one of these three numbers. You will have to use some sort of magnification to read it, but that will tell you which of these three diodes you have. And they are all different.

That linear driver that BowtieGuy linked me to is called the "Blitz Linear Driver" and is on Survival Laser's website.
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Old 08-16-2017, 06:22 PM #634
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Default Re: 505nm and 480nm diode RESULTS

I didn't need any magnification to see it!! Hehe! I also got to see this case pos diode running in person at SELEM! Not as blue as ide imagined but still a cool color
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Old 08-16-2017, 06:29 PM #635
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Default Re: 505nm and 480nm diode RESULTS

Recieved the Odicforce 515-520nm Drivers i ordered,
First glance at the spec sheet they seem promising for these 505nm diodes,
I'll get some testing done this weekend and ill be posting it in the other thread about this specific driver
Can be viewed here:

Odicforce Boost Driver?

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Old 08-16-2017, 06:31 PM #636
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Default Re: 505nm and 480nm diode RESULTS

You are talking about the 503nm diodes, right? Those are the only ones that are case positive. The "480nm" diodes are case neutral.


Edit: Those boost drivers won't work with the case positive 503nm diodes unless you isolate the case from the rest of the host.

Yeah! I got the boost driver from China I had been waiting for today. Hopefully, I'll have some time later today to test it.
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Old Today, 02:15 AM #637
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Default Re: 505nm and 480nm diode RESULTS

I finished the testing of the four 505nm diodes I received from Techhood today and the results are as close as I could get to room temperature with these diodes without a heat sink. I have a heat sink coming that will allow me to test bare diodes and keep them at room temperature without pressing them into anything. I still have a couple of weeks left before it arrives.

In order of wavelength: 502.0 nm, 502.2 nm, 502.8 nm, and 503.2 nm. As they were allowed to warm up they did increase dramatically in WL. That is about 1.5 nm to 2 nm higher for each diode. I didn't allow them to get past very warm to the touch as I didn't want to take the chance of losing any.
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Last edited by paul1598419; Today at 02:17 AM.
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Old Today, 02:43 AM #638
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by paul1598419 View Post
I finished the testing of the four 505nm diodes I received from Techhood today and the results are as close as I could get to room temperature with these diodes without a heat sink. I have a heat sink coming that will allow me to test bare diodes and keep them at room temperature without pressing them into anything. I still have a couple of weeks left before it arrives.

In order of wavelength: 502.0 nm, 502.2 nm, 502.8 nm, and 503.2 nm. As they were allowed to warm up they did increase dramatically in WL. That is about 1.5 nm to 2 nm higher for each diode. I didn't allow them to get past very warm to the touch as I didn't want to take the chance of losing any.
I may have some 532 pointer modules that I took apart.
Some of these are constructed so that the diode is placed in the module then secured with a threaded ring. If you'd like, I can send them to you. I have one for 5.6mm and one for 9mm diodes. The only difficulty with them is that they wont accept any of the lenses we're used to using - not without some creativity, anyway. PM me if you're interested.
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Old Today, 03:06 AM #639
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Default Re: 505nm and 480nm diode RESULTS

I'm not entirely sure what you are offering me. Is it just the modules, or diodes in the modules? I could use some 808nm diodes, but really have no use for modules that are different than the ones we normally use....unless they are for particularly high power diodes.
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445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
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635nm Lifetime17 Mini-camo build 687mW
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
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Scientech Vector S310 with AC2500 10 Watt LPM
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Old Today, 03:54 AM #640
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by paul1598419 View Post
I'm not entirely sure what you are offering me. Is it just the modules, or diodes in the modules? I could use some 808nm diodes, but really have no use for modules that are different than the ones we normally use....unless they are for particularly high power diodes.
It's a module that allows you to mount a diode without press-fitting it. It is really convenient if you need easy removal.
The diode is secured with a threaded ring.
Like I said, you won't be able to easily use our normal lenses but it may be sufficient for getting a reading on a spectrometer if you are typically using bare diodes.
The module diameter is 12mm so it will fit into heatsinks designed to accept the 12mm Aixiz style modules.

Here is a picture of the part of the module with the diode socket:

Last edited by RA_pierce; Today at 04:28 AM.
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