Line-width of CW laser
Dear Friends,
If we take the default parameters of CW laser where line-width is 10MHZ. Can we measure it form its optical spectrum via OSA. As we know Linewidth is the width of optical spectrum at half maximum peak power (FWHM).
If not so, then how can we exactly measure it?
Regards
Responses (7):
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Dear Friends,
If we take the default parameters of CW laser where line-width is 10MHZ. Can we measure it form its optical spectrum via OSA. As we know Linewidth is the width of optical spectrum at half maximum peak power (FWHM).
If not so, then how can we exactly measure it?
Regards
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Usually OSAs have 0.01nm as lower resolution (1.25GHz), so a small CW linewidth must be measured with other methods.
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Please let me know one of the easiest method to measure line width of optical sources…
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Some methods are briefly described here: http://www.rp-photonics.com/linewidth.html
It also depends on the instruments you have available in your lab… -
excellent source of knowledge, thanks for sharing
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The best method will depend on what type of laser you are working with. Besides, the line width of your source will depend on modulation you use.
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Hi Ravil, the bandwidth parameter inside OptiSystem is the CW line, so if you want to match the measured value with simulation you should not modulate your source…
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Hi Alessandro, thank you for your specification.
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