Hello everyone.
Some two weeks ago i got an 405nm LD which was extracted from a PHR803-T. First I was thinking, as many seem to, that it was the Sharp GH04P21A2GE. Nevertheless i measured the voltage across the pins 1 and 2 while illuminating the LD with a halogen spot and found out that the pinout is not the same as in Sharp's datasheet. According to the datasheet pin 1 is the Anode (+) and pin 3 is the cathode (-). According to my measurement the LD at hand has the pins swapped, thus pin 3 is the Anode.
I made some reflection holograms with that LD and found the coherence length to be at least 12cm. This is not bad, especially as i was thinking that i would get the Sharp LD first, and that one has miserable spectral distribution and would have been no good for holography.
Unfortunately that LD died too soon.
Later i got 2 more PHR803-T and could test one of the LDs. Unfortunately this LD only has a coherence length of a few mm.
It would be a big help for me if i could find out the producer of the first LD. Does anybody know which LDs are usually found in PHR803-T sleds except for the Sharp GH04P21A2GE?
The LD has a stamp on the bottom of the case, looking like a digital postage stamp:
Does anybody know what the brand/type of this LD is?
Thanks a lot.
Ahmet
Some two weeks ago i got an 405nm LD which was extracted from a PHR803-T. First I was thinking, as many seem to, that it was the Sharp GH04P21A2GE. Nevertheless i measured the voltage across the pins 1 and 2 while illuminating the LD with a halogen spot and found out that the pinout is not the same as in Sharp's datasheet. According to the datasheet pin 1 is the Anode (+) and pin 3 is the cathode (-). According to my measurement the LD at hand has the pins swapped, thus pin 3 is the Anode.
I made some reflection holograms with that LD and found the coherence length to be at least 12cm. This is not bad, especially as i was thinking that i would get the Sharp LD first, and that one has miserable spectral distribution and would have been no good for holography.
Unfortunately that LD died too soon.
Later i got 2 more PHR803-T and could test one of the LDs. Unfortunately this LD only has a coherence length of a few mm.
It would be a big help for me if i could find out the producer of the first LD. Does anybody know which LDs are usually found in PHR803-T sleds except for the Sharp GH04P21A2GE?
The LD has a stamp on the bottom of the case, looking like a digital postage stamp:
Does anybody know what the brand/type of this LD is?
Thanks a lot.
Ahmet
