How if a typical ED (Erbium-doped) fiber can be used as a CPA (coherent perfect absorber) for certain absorption Laser frequencies, e.g. 532nm, 650nm?
Or, if one can devise a ED fiber being the exact opposite of the laser process, i.e. make a design that we termed a CPA for certain application such as Raman Spectroscopy. My understanding is that the CPA can perfectly absorb incoming coherent laser light with given frequency and turns it into some form of internal energy — EM heat or energy.
Over the last few months, just got learned more about the essence of possible implementation for the CPA fiber material, though it has not been proven yet.
Practically, while PM fibers are designed for maintaining polarization states, turning them into CPAs requires careful consideration of both the fiber's and the incoming light's properties. Given that the field of CPAs is still in its research stages, implementing it in PM fibers would require a deep understanding of both fields and might necessitate significant research and development.
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