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True Green Diodes coming?

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shintashi

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New picosecond pulsed diode lasers at 500 nm and 510 nm by PicoQuant

I'm not sure if this has been mentioned yet, but in my quest for fancy new diodes, I tripped over this article, originally from July 15th and reprinted August 15th (3 days ago).

Berlin (Germany), 15 July 2011 – PicoQuant GmbH announces the release of the long-awaited 500 nm and 510 nm picosecond pulsed diode laser heads. For the first time, green laser emission is not generated by wavelength conversion techniques, but directly generated by a semiconductor laser diode. The availability of the new wavelengths opens the door for entirely new applications in bioanalytics, biochemistry, genetics, semiconductor characterisation and quality control.

...

With the official release of the new models, the PicoQuant diode laser family “LDH Series” now covers the entire wavelength range from 375 nm to 1990 nm . All laser heads come with collimator optics that can optionally be fitted with optical fibers. The new 500 nm and 510 nm laser heads are compatible with PicoQuants family of diode laser drivers “PDL Series”.

Technical Data
LDH-P-C-510
Center Wavelength 510 nm ± 10 nm
Repetition rate from single shot to 40 MHz
Pulse width < 130 ps (FWHM) at average power 0.3 mW at 40 MHz repetition rate
Pulse width < 600 ps (FWHM) at average power 2.0 mW at 40 MHz repetition rate
Average output power in continuous-wave mode: 10 mW

LDH-P-C-500
Center Wavelength 500 nm ± 10 nm
Repetition rate from single shot to 40 MHz
Pulse width < 130 ps (FWHM) at average power 0.5 mW at 40 MHz repetition rate
Pulse width < 500 ps (FWHM) at average power 2.0 mW at 40 MHz repetition rate
Average output power in continuous-wave mode: 5 mW
Click to expand...


edit: direct product source
http://www.picoquant.com/getfs.htm?products/ldh/ldhseries.htm
 
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Paul0759

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covers the entire wavelength range from 375 nm to 1990 nm
Click to expand...

Good times ahead :)

Finally we might see the PINK! lasers that we have all longed to see :D
 
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joeyss

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You can't make pink with one WL. You need a balance of blue and red. 405nm and 660nm work to make a pinkish color. Even then it's magenta
 
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shintashi

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joeyss said:
You can't make pink with one WL. You need a balance of blue and red. 405nm and 660nm work to make a pinkish color. Even then it's magenta
Click to expand...

That sounds like the PS3 diode mix. To me, the 445nm looks indigo and the 405 looks almost magenta, but I noticed while looking at some flowers the "purple" and "pink" aspects don't always show up on digital photography.

I think these diodes are supposed to be sea green, judging by how close they are to the 473 spectrum.
 
Wolfman29

Wolfman29

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Eh. 510nm or so is definitely green. Still a bluer green than 532, but still definitely green.
 
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shintashi

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Wolfman29 said:
Eh. 510nm or so is definitely green. Still a bluer green than 532, but still definitely green.
Click to expand...

makes sense for the 510. The LDH-P-C-500 is 500 nm ± 10 nm, so between 490 and 510. If we are looking at 490-500, would that be sea green?

I'm still trying to get a less vague idea of what the nm differences are in color... like do they correspond every +60nm or something, or is like a sliding chart? Or is it just messy with some colors - say, yellow - having only a tiny range?
 
Pontiacg5

Pontiacg5

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new11.jpg


The green on the left is argon green, 514 nm. I had the privilege of seeing a few hundred mW of 514nm argon through a PCAOM at SELEM this weekend. It may not look it next to the blue but it is very green in person.

IMG_20110819_225626.jpg


Here is a white light gas laser through a Lumia wheel, you can really see how green it is here.
 
Tech_Junkie

Tech_Junkie

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This is old news. IIRC RHD has already harvested one of these. Do some searching here and you'll find the info.

Maybe I live in a different world, but I'd be embarrassed to show someone a pink laser. I want to see a black laser. Now that would blow peoples minds.
 
Pontiacg5

Pontiacg5

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What RHD harvested is a directly doubled module, a 1064nm diode and KTP crystal. It still lases at 532nm and is not a true green diode by any means.
 
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