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Pman, Planters, and DTR, Thanks for the replies. Some other things came to mind today. 1) From start to finish (noticing the haze) was about 20 minutes. 2) I operated without the G2 lens for about 15 minutes. 3) The laser was operating less than 10 minutes total at various power levels...

Regarding the distortion one person saw with the LD. I just experienced this with a 9mm NDB7875. I was working on different beam expanders and suddenly the beam got very “hazy”. I shined the raw beam (no optics) on the wall and the beam was very distorted and not uniformly bright. I tried...

DTR, Awesome work - thanks for sharing. I'm trying to gage the power density between the NDB7A75 and the NDB7875. For example, if I focus both lasers at 20 feet which one produces the highest power density (watts/area) or do they both produce the same power density?

You need to work on your penmanship. Just kidding! Looks good. When I'm president, all preschoolers will learn to write with a laser.

You can see how Casio is sweating the laser safety issues by expending cost and manpower to develop methods to hinder laser diode removal. The need for product modifications most likely originated from their legal department trying to distance themselves from future liability by showing that...

Nostalgia? I worked with Toshiba providing independent testing of their TOLD series 670 nm laser diodes (gain and index guided) around about 1989. I used the tried and true LM317 as a current regulator with an initial separate current shunt to create a soft turn-on and soft turn-off to help...

By laser head, I meant the part that is in your palm.

I was interested in the head of your laser, and I was hoping for more detail than shown in the video. Like I posted before. Your design is pretty cool. I was thinking about making one, but not exactly like yours. My power supply is about the size of 2/3 of a 9 volt battery - this includes...

Is there a chance you could please more detailed pictures?

I can't stop watching the video - nice job! Do you have an estimate of the output power?

Re: New Stock of Overspec 5mW Green My three arrived today. Thanks for the fast service!

Re: New Stock of Overspec 5mW Green I'd like to order 3 if I can.

Re: Lol ! I guess I'm missing something. But, if you would read through the thread, I was the person plotting the percent degradation versus operating minutes on a log-log plot after Igor posted updated data. The last update was when the diode was at 150 hours. It seemed that the updates...

Re: Lol ! Wow, I wasn't trying to offend anyone or imply that Igor should dedicate 100% of his time toward this testing. I was just curious if the 1st 8X diode was still living.

Any updates on the testing.

Here is the latest degradation plot that includes the 150 hour data. I had to rescale the y-axis to include 0.8 - 1.0. This is still a log-log plot.

IgorT, I used all of the data that you posted here to create the graph. Here is the latest graph. It may look the same but the last data point marker is a little thicker because both both 90 hr and 100 hr data points are very close on the log-log plot. The 3600 minute data point that is...

Has anyone tried using their blu-ray to pump a dye laser (rhodamine 6g, etc.)?

Latest degradation plot and projected degradation. The projected curve is the same curve since 600 minutes.

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