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I highly doubt that a person can perform 0.001mm resolution with "bare hands" (though such precision is not needed anyway to align the relative diode-lens position). Making the diode movable in xy have to be designed in such way, that the heat transfer is still good enough for a handheld device...

I would suggest to use two set screws to be able to choose which one (or both) is used. In addition I had great success with spring ball plunger set screws. The allow to do the final adjustment under spring tension so nothing slips away. Singlemode

Great pictures! Singlemode

Apologies accepted Cyparagon :beer: I agree with you that a huge part of the beam power is lost on the way up. Also due to scatter on dust particles, water and everything else. On the pictures you can see the beam very clear on the first miles. This means that it is scattered a lot! That is...

I have no idea how to convert a visible illuminated white surface into something else like power or whatever. It will definitely depends on a lot of parameters, especially the material of the surface. If you could formulate your question in terms of beam intensity or power... With the...

I guess you have misunderstood here something. These laser has exactly the wavelength of sodium atoms to excite them. Singlemode

These lasers reach at 90km bevor they are getting absorbed by sodium atoms in the upper atmosphere. Singlemode

If it is a pure Gaussian (It is very close to it since the light is freq.doubled in a resonant cavity that is a superb mode cleaner) than this would result in 0.001 mrad ! Singlemode

Just found this: Four Lasers Over Paranal | ESO United States 20W yellow in a single longitudinal and transversal mode!!! Guess they are not cheap though;) Singlemode

Most of the Singlemode 405nm diodes run a little higher. Thorlabs offers some fibre coupled versions with binned wavelengths. One can use this as an estimate of the wl distribution to see what's possible. The high wl edge for these is 408nm-410nm for the rated op. conditions. These GaN diodes...

Thanks for the nice review Z. It is a pitty that the color is not as different as you expected it to be. But you still have one of a kind here in the forum. Keep looking for the 420nm version. As fat as I know these go for the same price as the 430nm. Singlemode

Welcome! Enjoy the forum and stay safe. Singlemode

Re: Experimental Pitch Adjustable LD Mount Nice design CDBeam. If the heat transfer is good enough than it should work. One thing remains to be tested and that is how easy/hard it is to align the mount properly. Look forward to your results. Singlemode

Nice review, thanks for sharing. Singlemode

Nice find! Looks much more helpful as a helping hand, when it comes to holding pcb boards. Singlemode

Hi, the picture looks like a dirty diode window. There is a chance that you can still clean it. How did you clean the window exactly and what kind of alcohol have you used? Singlemode

Thanks, where did you bought the diode? Do they also had other Nichia engineering samples? Singlemode

This is an array with 40 emitters... Singlemode

The datasheet for these states a range between 480nm and 495nm. An earlier batch was centered around 494nm (+/- 1nm) while the batch that is now available (DTR) is more 489nm (+/- 3nm). Sharp is definetly binning some diodes from every run for quality control but they don't offer single selected...

As far as I understand, a single VCSEL diode has a much lower outputpower compared to a single FP diode. The reason for this is the very high reflectivity of the facet, that keeps most of the laser emission inside the cavity. Some applications, like optical pumping in gas cell based atomic...