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Oh man, i'm so sorry, but i have still been unable to type in all the Vf data for the diodes, i have three booklets full of numbers i have to type into Excel! :undecided: But other than the missing Vf data, i already have full P/I data for 79 good old GGW diodes (up to 200mA), around 11 "new"...

What do you mean by "topping off"? Did you plot it and found a knee (or more likelly a kink) there? So you left the driver at the same current, only switched the diode and got the same power? If you're sure it does not get as warm, it would mean that the diode has a higher efficiency, and...

I first started noticing it a year and a half ago, when i had a bad eye infection, couldn't wear lenses and had to wear my glasses, which block 405nm quite a bit. I was also intrigued, cos i thought it was a new thing, but it was the glasses that allowed me to see it. Usually it is obstructed...

Hey Shogoki! You chose a good time to come back from the dead! :yh: It IS great news! I am amazed more and more every day, when i wake up and see the diodes still alive! Right now i'm waiting up for them to reach 140 and 280 hours and re-plot them. Don't want to have to pause the Torture...

The "bendyness" is not really a problem for this comparison, it showed where the diode belongs in terms of efficiency. What i'm wondering is, you mentioned another 10x. Is it plotted, or at least up and running, measured and at a known current? I'd love to know what it came to. P.S. I'll...

Guys, i have set up a new email address, for laser related stuff specifically (want to keep it separate from my personal email, so it's less crowded). I would appreciate, if new orders or any questions or requests for help would go there. The email is in the forum link. This is meant for NEW...

I used your numbers to plot the diode and try to compare it. The numbers were a little "bendy", so i used the average 50mA step (= 66.40mW => 1.328mW per mA) and some calculations to extrapolate down to the bottom of the graph, and up to 400mA. Here is the diode alone: My calculations...

The diodes passed 120 and 260 hours today! :yh: Here is a re-plot of Murder Candidate #2: Po @348mA = 401.3mW = 88.49% of initial power Interestingly, this is one of the smallest drops overall. Only 1mW less than 20 hours ago! That's why the latest plot is overlapping the previous one...

The diodes are 150 cycles away from 250 and 110 hours, but i'm spreading out the re-testing intervals to 20 hours for the second murder candidate, to speed up the cycling, so next test will be at 120h. In the meanwhile, here is the data from last night at 240 and 100h: Murder Candidate #1...

Here is the 80 and 90 hour data. Basically little new to see here, the diode is holding up quite well, the 80 and 90h plots are the two pale bottom lines. Absolute Efficiency dropped to 20.21%. Po @ 348mA is 405.3mW or 89.37% of initial power.. The behavior can better be seen in these Po...

Thanks for the review, Nicklas! Before i go back to work, i just want to elaborate on two things: Actually, what i was trying to tell you was, that it made more sense to reach a higher power with a higher power diode first, rather than using a PHR. But a glass lens would still make a...

The diodes are 80 cycles away from 90 and 230 hours. I took down the 80 hour data yesterday but will post a double report today, due to time constraints.

Here's another way to look at what's happening with diodes. I made two plots showing power changing over time with the data collected so far. The first one shows percentage of initial power over time for both diodes: The second just power dropping over time, with the 90% point marked for...

Murder Candidate #2 70 hour PI plot: Ith = 34mA Slope Efficiency = 1.297mW per mA Absolute Efficiency = 20.34% Po @ 348mA = 409mW = 90.19% This time the line is the bottom one, only still slightly overlapping an earlier plot. But the diode is holding up very well. Again, barelly any...

The diodes have reached 70 and 210 hours! I'll post a double re-plot and some pics in the morning. At this point i have to admit, i underestimated the 8x's. If an initial 10% drop in power is acceptable, they can be exceedingly reliable even at very high powers. No wonder it's possible to...

Sorry for the update delay. I suffered a bad computer crash yesterday and almost lost the 50 hour data. Luckily Excel is smarter than me and i managed to recover it from a hidden autosave file. In the meanwhile the cycling went on uninterrupted and the diode has passed 60 hours, so i'm posting...

And indeed we have 50 and 190 hours. I don't know what i was worried about before. Plots will be up in a bit.

Here's the double re-plot data from last night... First our second Murder Candidate (8x #1) at 40 hours: Diode Stats: Ith = 33mA Slope Efficiency = 1.306mW / mA (1.294mW/mA @30h) Absolue Efficiency = 20.71% (20.58% @30h) Po @ 348mA = 413mW = 91.97% of initial Po (408.7mW = 90.11% of...

Both diodes survived till the last point (40 and 180h) and both did something completelly unexpected in terms of degradation, but not in a bad way. :thinking: I plotted them both, but unfortunatelly i will have to post the data in the morning, cos i have a bunch of work to finish, in the...

Cool, thanks for the info. Usually i assume constant power with data like that cos of drive manufacturers.. Murder Candidate #2 nearing 40 hours! The old diode is almost at 180h. Time for a double re-plot in a few..