Sled-pbs

Anyone knows how well the pbs cubes in the phr and/or ps3 sled works for combining two diodes of the same wavelength (405, 660 or 780nm). I did an experiment myself with the small cube in the ps3 sled and it seem to work good ones the polarisation is right.

Can someone else please confirm with a power-meter? I'd really like to know how efficient it is.

Yes, it work, as far as you keep one diode in vertical polarization, and one in horizontal ..... i tried with 2 red modules 100mW (reading them, 102 and 107 mW), and i got a reading at the out of 189 mW (better polarization and alignment possible), so there's a little dispersion to the sanded face from both the beams (also a beam alone loss 6 to 11% through the PBS), but this is probably unavoidable, cause none of the existing optics can have 100% efficency.

Good enough for me, thanks for testing!

Please keep in mind that results may vary ..... i got this reading after around half hour of alignment and adjusting of polarization rotation, can also obtain something more if better aligned, or less, if polarization planes are not aligned good, ok ?

As example, just that i had the modules already mounted, i tried to exchange the PBS with a bit bigger one coming from an old HP 4X burner, and got few mW more, after a bit of alignment ..... trying with a smaller cube, coming from a newer dvd burner, i'm unable to get more than 150 mW, with the same modules (probably the cube is just too small and some of the light get lost, or maybe the quality is not so good, i don't know really)

Try with the cube in the PHR-sled. With the "phr lens mod" the beam will fit inside the cube no problem.

I even took some pics how I did mine:

Vise, aixiz/sure housing, original lens with nut, inverted LED for pressing out the original lens, press-spacer.


Nut only half way in.








Press in the plasic locking ring upside-down in the nut against the table.


Put in the PHR disk reading lens, flat side up in the pic.


Glue or fuse it in place, I used the soldering tip.



And here are two beams combined with the cube.



Try this and see if you get a better result.

Wait, forget what I said about trying the phr-cube, it only works for two different wavelengths. Only the ps3 cube seems to work.

what?!? according to firemylaser's pic, the objective lens from the phr sled fits exactly into the (flipped) aperture from the common aixiz acrylic lens?
*facepalm*
i better not state how long and painful it was for me to halfway secure some objective lenses to anything with a 9x0.5mm thread..

manuel

Well the more you know...

Anyone else want to do some tests? The big cube in the ps3 sled combines red beams pretty good.