Using photodiodes/ phototransistors are effective for this measurement, as the absorption spectrum traces are in the range of 10^-24.
Also how to choose the photodiodes/phototransistors
Also how to choose the photodiodes/phototransistors
10^-24 of what? Please add units if they exist, or if not, then what is it a count or ratio of? If you already know what devices will work, please give an example of that device.Using photodiodes/ phototransistors are effective for this measurement, as the absorption spectrum traces are in the range of 10^-24.
I read the absorption line intensity of the order of 10^-24 cm/molecule after absorption. The laser power is 10mW. Can I use photo diode/transistor to measure the change in intensity. If so, then what will be the range of voltage difference.10^-24 of what? Please add units if they exist, or if not, then what is it a count or ratio of? If you already know what devices will work, please give an example of that device.
John
I read the absorption line intensity of the order of 10^-24 cm/molecule after absorption. The input power of laser is 10mW. Can I use photo diode/transistor to measure the change in intensity. If so, then what will be the range of voltage difference.How small is a "small change in the intensity"?
can you please explain..?Convert this "small change" to an AC signal.
Then you can process this signal with simple electronics.
I once worked for a company that made IR gas analyzers using rotating IR filters on a wheel...