Home Forums SYSTEM Line-width of CW laser

Line-width of CW laser

Profile Photo
(joined November 2014)
Participant

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):

    • #15722
      Profile Photo
      Aadil Raza
      Participant

      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

    • #15723
      Profile Photo
      Alessandro Festa
      Participant

      Usually OSAs have 0.01nm as lower resolution (1.25GHz), so a small CW linewidth must be measured with other methods.

    • #15762
      Profile Photo
      Ravil
      Participant

      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.

      • #15823
        Profile Photo
        Alessandro Festa
        Participant

        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…

        +2
    • #15846
      Profile Photo
      Ravil
      Participant

      Hi Alessandro, thank you for your specification.

Login You must be logged in to reply to this topic.