Controlling optical wavelength of illumination to improve reproduction rates in microorganisms

AI Thread Summary
The discussion centers around creating a device to enhance reproduction rates in microorganisms that thrive under blue light. The initial idea involves using Neodymium-doped yttrium orthovanadate crystals to convert infrared light to green, but concerns about sustainability and cost are raised. Participants suggest that while frequency doubling using nonlinear optics requires high intensity, converting UV light to blue using fluorescent materials may be more feasible. They recommend considering commercial LEDs with specific wavelengths for a practical and cost-effective solution. Additionally, the importance of directing light effectively and testing initial concepts with available illumination sources is emphasized, along with the need for data on the microorganisms being studied.
metz
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TL;DR Summary
reproduction, optics, wavelengths, light, sustainability, material, chemistry, earth sciences, microorganisms
hello!
I am trying to make a device that will improve reproduction rates in certain microorganisms that I am studying. They reproduce fastest under shorter wavelengths, specifically best at blue light. Any ideas for devices or materials that could help out would be appreciated! An idea I had was to use crystals, specifically Neodymium-doped yttrium orthovanadate, which can split an infrared wavelength in half and make it green (i think). I can use the material under the sun to turn all the higher wavelengths into lower to preserve the same light energy, but convert it into lower wavelengths. Issues: not sustainable, probably expensive. Any other similar ideas or ways I can improve on my idea? thanks!
 
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Welcome to PF.
metz said:
An idea I had was to use crystals, specifically Neodymium-doped yttrium orthovanadate, which can split an infrared wavelength in half and make it green (i think).
Infrared is the low-energy end of the spectrum, ultraviolet is the high-energy end. You can down-convert UV to visible light, but not easily up-convert IR to visible.
 
metz said:
TL;DR Summary: reproduction, optics, wavelengths, light, sustainability, material, chemistry, earth sciences, microorganisms

hello!
I am trying to make a device that will improve reproduction rates in certain microorganisms that I am studying. They reproduce fastest under shorter wavelengths, specifically best at blue light. Any ideas for devices or materials that could help out would be appreciated! An idea I had was to use crystals, specifically Neodymium-doped yttrium orthovanadate, which can split an infrared wavelength in half and make it green (i think). I can use the material under the sun to turn all the higher wavelengths into lower to preserve the same light energy, but convert it into lower wavelengths. Issues: not sustainable, probably expensive. Any other similar ideas or ways I can improve on my idea? thanks!
Most commercial LEDs have a spike at 400nm. Do you have a radiometer you can borrow from the physics techs? If not you can check the technical spec sheet before you purchase and check the SPD. You will get low UV and dips in green and red but get your blue spike.
 
metz said:
TL;DR Summary: reproduction, optics, wavelengths, light, sustainability, material, chemistry, earth sciences, microorganisms

hello!
I am trying to make a device that will improve reproduction rates in certain microorganisms that I am studying. They reproduce fastest under shorter wavelengths, specifically best at blue light. Any ideas for devices or materials that could help out would be appreciated! An idea I had was to use crystals, specifically Neodymium-doped yttrium orthovanadate, which can split an infrared wavelength in half and make it green (i think). I can use the material under the sun to turn all the higher wavelengths into lower to preserve the same light energy, but convert it into lower wavelengths. Issues: not sustainable, probably expensive. Any other similar ideas or ways I can improve on my idea? thanks!
These are photosynthetic I take it? What species? @jim mcnamara and @BillTre for their reference.
 
metz said:
An idea I had was to use crystals, specifically Neodymium-doped yttrium orthovanadate, which can split an infrared wavelength in half and make it green (i think).
Frequency doubling with nonlinear optics requires very high intensity to have a significant effect, much more than your samples will tolerate.
 
You should be able to convert UV to blue, by using a florescent material.

One problem will be directing the scattered light produced, so that it falls where you can use it.
 
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I think the simplest solution would be just purchase some batches of LEDs with the appropriate wavelengths (and a driver circuit, of course).
led-colors-by-wavelength.jpg

It's not a continuous spectrum, but cheap and stable.
 
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Hi @metz. Out of curiosity, what is the size - e.g. Petri dish or large tank?
 
"They reproduce fastest under shorter wavelengths, specifically best at blue light."
can you share your data?
 
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Two factors at play here. May I suggest the you first demonstrate your concept by using whatever straightforward, perhaps impractical source of illumination you can find. Then, when you have done that and identified the illumination that you want, you can find and acquire the best way to produce the illumination you want in a practical manner.
 
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