Yellow Laser So Expensive??

Encap said:

The above post are the short answers---is not only that but they are not tricky to make involving a complex process and not very efficient --- low output for high input energy thus expensive to make.Currently only CNI in China make yellow hand helds

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Encap said:

Yellow laser pointers emitting at 593.5 nm became available in recent modern times.. Although they are based on the DPSS process, in this case two lasing lines of the ND:YVO4, 1064 nm and 1342 nm, are summed together with a nonlinear crystal. The complexity of this process makes these laser pointers inherently unstable and inefficient, with their outputs ranging from 1 mW to about 10 mW, greatly varying with temperature and usually mode-hopping if they get too hot or too cold. That is because such a complex process may require temperature stabilizers and active cooling, which can't be mounted into a small sized host. Also, most smaller 593.5 nm pointers work in pulsed mode so they can use smaller and less powerful pumping diodes. New 589 nm yellow laser pointers have been introduced using a more robust and secretive method of harmonic generation from a DPSS laser system. This 'sodium' wavelength, although only 4.5 nm away from the older 593.5 nm, appears more gold in colour compared to the more amber appearance of the 593.5 nm wavelength. Astronomical observatories use a specially tuned dye laser at 589.2 nm (yellow) to create a Laser Guide Star for use with astronomical adaptive optics" from: https://en.wikipedia.org/wiki/Laser_pointer

Some great pictures of yellow lasers used for Astronomical research purposes -- Yellow laser used to create an artificial star by shining a laser into the atmosphere!! see: Encyclopedia of Laser Physics and Technology - laser guide stars, sodium beacon, adaptive optics, atmospheric correction, astronomy, artificial guide star
Some great pictures of yellow laser guide star creation at bottom of page here : https://en.wikipedia.org/wiki/Laser_guide_star

Pretty amazing, yes??

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ultimatekaiser said:

not entirely true. a few places make yellow at request. they're just not the norm. :

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LeHap said:

He was talking about yellow handhelds friend

-Alex

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ultimatekaiser said:

Ah. but still, I think they were the first widely known, large business to sell them, I don't think they're the only one though. I believe I've seen a couple companies sell them. as well as parts for them.

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Encap said:

The above post are the short answers---is not only that but they are very tricky to make involving a complex process and not very efficient --like 1% or thereabouts--- low output for high input energy thus expensive to make.Currently only CNI in China make battery powered yellow handheld lasers

" Yellow laser pointers emitting at 593.5 nm became available in recent modern times.. Although they are based on the DPSS process, in this case two lasing lines of the ND:YVO4, 1064 nm and 1342 nm, are summed together with a nonlinear crystal. The complexity of this process makes these laser pointers inherently unstable and inefficient, with their outputs ranging from 1 mW to about 10 mW, greatly varying with temperature and usually mode-hopping if they get too hot or too cold. That is because such a complex process may require temperature stabilizers and active cooling, which can't be mounted into a small sized host. Also, most smaller 593.5 nm pointers work in pulsed mode so they can use smaller and less powerful pumping diodes. New 589 nm yellow laser pointers have been introduced using a more robust and secretive method of harmonic generation from a DPSS laser system. This 'sodium' wavelength, although only 4.5 nm away from the older 593.5 nm, appears more gold in colour compared to the more amber appearance of the 593.5 nm wavelength. Astronomical observatories use a specially tuned dye laser at 589.2 nm (yellow) to create a Laser Guide Star for use with astronomical adaptive optics" from: https://en.wikipedia.org/wiki/Laser_pointer

There are some great pictures of yellow lasers used for Astronomical research purposes -- Yellow lasers are used to create an artificial star by shining a laser into the atmosphere!! see: Encyclopedia of Laser Physics and Technology - laser guide stars, sodium beacon, adaptive optics, atmospheric correction, astronomy, artificial guide star
See some pictures of yellow laser guide star creation at bottom of page here : https://en.wikipedia.org/wiki/Laser_guide_star

Pretty amazing, yes??

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alexisv323 said:

Wow Thanks for the Great explanation. Maybe a few more years and hopefully they will become more affordable.

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VanillahGorilla said:

I have wondered the same. That makes sense, not a lot of application in the real world for them. Would be nice at some point to see yellow diodes available, at a reasonable price, so we can build custom yellow handhelds as we see fit.

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hakzaw1 said:

^^ that will never happen-sry

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