Hello there,
I saw on some conventional BOTDA designs on the net that, they are using two different laser sources in BOTDA. Is that not more expensive than using one laser? Could be there another reason for this except for the difficulty of using loop design?
Thanks in advance,
Best Regards
Hello!
To the best of my knowledge, I do not see any good reason to use two lasers except for the case you mention. In addition to the cost, the wavelength stability of the two lasers to keep and control the frequency difference is another significant challenge.
I can be wrong but I think that all commercial BOTDA and BOFDA use a single laser source.
Best regards,
Fabien.
Dear Dr. Fabien,
Thank you very much for your answer.
Actually, I could reach only two companies' BOTDA designs and they use two sources in their architecture. However, in academic papers ı see that they generally use only one source.
Best Regards,
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