DJNY
0
- Joined
- Nov 2, 2009
- Messages
- 5,991
- Points
- 83
is anybody able to explain in a few words why it is so difficult to make a blue laser?
LPF Donation via Stripe | LPF Donation - Other Methods
Links below open in new window
ArcticMyst Security by Avery
difference between blue and green
- Thread starter DJNY
- Start date
D
Deleted member 8382
Guest
because in green lasers IR light frequency has to be duplied once, on a blue laser you need to do this twice. Every conversion results in a very big loss in power, stability, etc.. If green lasers are already difficult to make, blue lasers can become a nightmare.
D
Deleted member 8382
Guest
It can always happen that someone discover how to produce blue diodes or a new type of crystals 
However, for lasershows the actual powers are already right, the CD/DVD/Blu-ray market is not interested since they already found a higher frequency diode type than blue (blu-ray). What I mean is that I doubt there's much people in the world trying to find a way to produce affordable blue lasers, so it's very improbable that we see this.
Yours,
Albert
However, for lasershows the actual powers are already right, the CD/DVD/Blu-ray market is not interested since they already found a higher frequency diode type than blue (blu-ray). What I mean is that I doubt there's much people in the world trying to find a way to produce affordable blue lasers, so it's very improbable that we see this.
Yours,
Albert
VW
0
- Joined
- Mar 1, 2008
- Messages
- 577
- Points
- 0
That sucks... It's a shame it's so hard to produce, even more of a shame that 593.5nm is even less eficient... It would be a dream to have these kinds of wavelengths in high power pointers...It can always happen that someone discover how to produce blue diodes or a new type of crystals
However, for lasershows the actual powers are already right, the CD/DVD/Blu-ray market is not interested since they already found a higher frequency diode type than blue (blu-ray). What I mean is that I doubt there's much people in the world trying to find a way to produce affordable blue lasers, so it's very improbable that we see this.
Yours,
Albert
- Joined
- Nov 10, 2008
- Messages
- 4,186
- Points
- 63
/agreed
- Joined
- Aug 25, 2007
- Messages
- 2,007
- Points
- 63
Not exactly, they both take 2 steps. They both use an 808nm laser to pump a crystal. For green, the 808 pumps a crystal that lases at 1064nm, and then KTP doubles the 1064 to 532. For blue, the 808 pumps a crystal that lases at 946, and then LBO (or similar) doubles the 946 to 473.
the difference is that KTP is a more efficient doubling mdeium than the ones used for blue, and lasing at 1064 is more efficient than lasing at 946. But they both take exactly 2 steps.
It can always happen that someone discover how to produce blue diodes or a new type of crystals
However, for lasershows the actual powers are already right, the CD/DVD/Blu-ray market is not interested since they already found a higher frequency diode type than blue (blu-ray). What I mean is that I doubt there's much people in the world trying to find a way to produce affordable blue lasers, so it's very improbable that we see this.
Yours,
Albert
People, myself included, are working every day on blue and green laser diodes, which will be more efficient than DPSS modules by a long shot. They're not for optical storage media, you're right, but they will have applications in displays like projectors and TVs. Also, blue and green laser diodes will have a lot of applications in science and industry in general, replacing big complicated argon lasers and such.
In fact, blue and green laser diodes both already exist now, just not fully commercialized.
Last edited:
D
Deleted member 8382
Guest
It's just a matter of time. I still wouldn't discart that someone discover a way to produce a diode that can produce more than one wavelenght. Imagine cheap multicolor lasers being sold. One regulator for the power and another for the color. That would be roxy
@pullbangdead: great info. +1! (thanks for correcting me)
@pullbangdead: great info. +1! (thanks for correcting me)
Last edited by a moderator:
- Joined
- Nov 10, 2008
- Messages
- 4,186
- Points
- 63
It's just a matter of time. I still wouldn't discart that someone discover a way to produce a diode that can produce more than one wavelenght. Imagine cheap multicolor lasers being sold. One regulator for the power and another for the color. That would be roxy
This day will come my friend, it's just a matter of time, as you said. The laser hobby is growing more popular everyday and besides that, science is improving a lot every single day. Just think how expensive even 5 mW greenies used to be and how cheap they have become nowadays
Personally, I won't abandon the laser hobby. I want to live the day of affordable blue and yellow lasers!
Last edited:
Moptsp
0
- Joined
- Sep 23, 2009
- Messages
- 429
- Points
- 0
- Joined
- Mar 10, 2009
- Messages
- 878
- Points
- 0
If I'm right the LBO crystals for blue lasers are also more complicated to create than the KTP type, and require very precise cutting of the facets to be efficient.
I have to say that pullbangdead summed it up very nicely.
I also heard and saw that they are trying to use blue lasers for holographic media storage; they want to reach a whopping 1TB per disk, if I remember correctly.
@Niko :
I would really want to see a -59nm laser....
I have to say that pullbangdead summed it up very nicely.
I also heard and saw that they are trying to use blue lasers for holographic media storage; they want to reach a whopping 1TB per disk, if I remember correctly.
@Niko :
I would really want to see a -59nm laser....
If I'm right the LBO crystals for blue lasers are also more complicated to create than the KTP type, and require very precise cutting of the facets to be efficient.
I have to say that pullbangdead summed it up very nicely.
I also heard and saw that they are trying to use blue lasers for holographic media storage; they want to reach a whopping 1TB per disk, if I remember correctly.
@Niko :
I would really want to see a -59nm laser....
An Anti-EM field wave...it'd suck "light"
D
Deleted member 8382
Guest
-59nm, obviously.
VW
0
- Joined
- Mar 1, 2008
- Messages
- 577
- Points
- 0
^They should use that stuff in IQ tests haha...
- Joined
- Nov 20, 2009
- Messages
- 140
- Points
- 0
all you need is the -59nm cube, I have plenty, PM me for them, I accept paypal and unicorn hair.
HIMNL9
0
- Joined
- May 26, 2009
- Messages
- 5,318
- Points
- 0
..... minus 59 nm ? ..... you divided "i" by zero somewhere, right ? ..... (j/k )
)
