437nm?

[White-Light]

Just wondering if anyone was contemplating trying 437nm?

Its being used by a disliked (on here) company and a few others now.

As its very close to 445nm I'm guessing its a similar colour but probably a bit dimmer. However, given the prices the companies incorporating into their projectors are charging I'd say its way nearer to 405nm than 473 / 445nm in price although I've only seen it offered in integrated solutions not as individual lasers.

[sugeek]

Just wondering if anyone was contemplating trying 437nm?
.

It could just be somebody did not proof read after updating the site 473 and 437 are just a small typo maybe?

-Adam

[allthatwhichis]

You may also mean 457nm...

[shrad]

doubling a platesetter laser diode from 860nm to 430nm with a BBO or a KNBO3 would also be possible, but I don't know if the price would be interesting

[sugeek]

doubling a platesetter laser diode from 860nm to 430nm with a BBO or a KNBO3 would also be possible, but I don't know if the price would be interesting

When looking up the 457nm lasers I found 430nm, 435nm and of course 457nm and 473nm. (reference: http://www.dreamlasers.com/products/laser/457nm.htm)

They are using Nd:YVo4 crystal to produce 946nm or 914nm and of course doubling to 473nm and 457nm. I was wondering if it would be possible to use an AR coating for both 946 and 914 and double both...? I am doubting it would work well due to the doubling crystal and Nd:YVo4 needing different temperature specifications for tuning and proper doubling. Nice idea but I don't think it would work easily. Okay after a little reading it is possible but complicated and Sum frequency mixing fun stuff (I need to read more).

-Adam

[White-Light]

Sorry I meant 435nm:

http://cgi.ebay.co.uk/LASERWORLD-RS6...d=p3286.c0.m14

Interesting thing is though you go to the CNI web site and they only list them in 1-2mw.

Could this be a record overdrive as LW claim 150mw or could it just be OEM exclusive modules as LW say they're using OEM.

If OEM's are available at 150mw from CNI, could open some interesting possibilities as they're obviously quite cheap compared to other blues.

[allthatwhichis]

Looks like BS to me...

"

Equipped with the new 435nm Blue Diode!

latest 2009 Laserworld / CNI OEM laser modules with very good beam specs & output power!
RS-RGB 600
Technical specifications:
- output power: max. 600mW RGB Guaranteed 530mw
- lasers: air cooled diode / DPSS lasers; >80mW green (532nm); >350mW red (650nm); >100mW blue (473nm)

"

Even the power is BS... (as usual) 80mW green (532nm) + 350mW red (650nm) + 100mW blue (473nm) = 530mW to me...

[frothychimp]

When looking up the 457nm lasers I found 430nm, 435nm and of course 457nm and 473nm. (reference: http://www.dreamlasers.com/products/laser/457nm.htm)

They are using Nd:YVo4 crystal to produce 946nm or 914nm and of course doubling to 473nm and 457nm. I was wondering if it would be possible to use an AR coating for both 946 and 914 and double both...? I am doubting it would work well due to the doubling crystal and Nd:YVo4 needing different temperature specifications for tuning and proper doubling. Nice idea but I don't think it would work easily. Okay after a little reading it is possible but complicated and Sum frequency mixing fun stuff (I need to read more).

-Adam

The theory of sum and difference mixing is pretty straight forward but the application is quite difficult. Often in solid state systems getting enough gain at one wavelength means sacrificing gain at a different wavelength. To get a Nd:YVO4 to lase at both 914nm and 946nm would require huge pumping power and if it works would result in 946nm gain much higher than 914nm. The 914nm transition may even be absorbed by lower laser level electrons that are 946nm transitions if both are the same lower level. Finally, purchasing dual coated optics for 914nm and 946nm would probably break the bank as it would certainly be a custom solution. Losses would differ between the two as well as the refractive indices. The losses incurred by the 946nm oscillator may overpower the ability of the 914nm transition to see any gain and oscillate on it's own accord. Rate equations for both transitions would have to calculated with respect to each other to determine if it's even theoretically possible.

[Doc]

Looks like BS to me...

"

Equipped with the new 435nm Blue Diode!

latest 2009 Laserworld / CNI OEM laser modules with very good beam specs & output power!
RS-RGB 600
Technical specifications:
- output power: max. 600mW RGB Guaranteed 530mw
- lasers: air cooled diode / DPSS lasers; >80mW green (532nm); >350mW red (650nm); >100mW blue (473nm)

"

Even the power is BS... (as usual) 80mW green (532nm) + 350mW red (650nm) + 100mW blue (473nm) = 530mW to me...

Ahh, but you were asuming that that they meant milliwatts. That figure is milliWorlds. Similar to a milliwatt; a measure of output power, but subject to a magical variable, that can only be understood by LaserWorld technicians, sales or marketing personel.

[sugeek]

The theory of sum and difference mixing is pretty straight forward but the application is quite difficult. Often in solid state systems getting enough gain at one wavelength means sacrificing gain at a different wavelength. To get a Nd:YVO4 to lase at both 914nm and 946nm would require huge pumping power and if it works would result in 946nm gain much higher than 914nm. The 914nm transition may even be absorbed by lower laser level electrons that are 946nm transitions if both are the same lower level. Finally, purchasing dual coated optics for 914nm and 946nm would probably break the bank as it would certainly be a custom solution. Losses would differ between the two as well as the refractive indices. The losses incurred by the 946nm oscillator may overpower the ability of the 914nm transition to see any gain and oscillate on it's own accord. Rate equations for both transitions would have to calculated with respect to each other to determine if it's even theoretically possible.

Thank you for the explanation, I read through a tripling 447 paper yesterday and they were using up to 540watts of pump power to get less than 5 watts of 447nm or about 12 watts of 670.1nm 9depended on the coatings on optics of course). It noted lots of trouble with harmonics and oscillations and of course lots of custom coatings. The only real sum frequency lasers I found on the market easily is the 491nm yellow and that is not much output and a lot of money... As soon as I finish my coffee and wake up I think I have a few more papers to read. Ooops I meant 591 but that mistake was well worth it for the article posted below... The schematics sure make it look simple but I know it is not...

-Adam