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Modulated laser effect on plants

  1. Nov 9, 2006 #1
    I'm interested in anything you have...links...sugestions...ideas about this field...
  2. jcsd
  3. Nov 9, 2006 #2


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    Can you be a bit more specific in your question? What wavelength or power? Otherwise, the answer could range from absolutely nothing, to stimulation of a particular set of photopigments, to burning a hole through it.
  4. Nov 10, 2006 #3
    Well...I'm interested in the stimulation of growth of plants...especially if there are any studies about pulsed lasers at low frequency ( 5Hz-20KHz ), with wavelengths that stimulate photosynthesis ...the wavelength doesn't matter too much...I just want pulsed lasers that stimulate plants to grow :-p
  5. Nov 10, 2006 #4

    jim mcnamara

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    The wavelength matters a lot - The absorption spectrum of chlorophyll
    would indicate that for max effect you would want the wavelength probably centered in somewhere in the "blues" circa

    chlorophyll a : 425nm
    chlorophyll b : 460nm

    unless you have a "sunlight balanced" laser light source

    I don't know of any studies on the effect of pusled light, so I can't comment about that.
  6. Nov 10, 2006 #5


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    What mechanisim do you think would be affected by either coherency or pulsing?

    Ordinary florescent lighing pulses at 60Hz, even though you don't see it.
    I don't know of any particular effects associated with that, given equivilent applied illumination.
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