Hi, Is anyone here currently working on Power over Fibre (PoF) Power Over Fibre technology?

There is a very hard physical limit to the possible power densities. At a few kW per square mm, the glass core of the fibre softens and melts. This in effect destroys the waveguide nature of the fibre, so the only way that power handling can be increased is to expand the diameter of the region carrying the energy- which makes it very multimode. More or less standard multimode fibre with active optical core diameters of ~ 0.1mm might reliably manage 4 or 5 watts of optical power at most - while if that was directed in a single mode fibre, the core would be melted. Converting that back to electrical energy is not especially efficient either.  While the technology may be optimized a bit, I'm not aware of any changes to the underlying physics. There is also the optical hazard to consider - firing more than milliwatts into the human eye is irreversibly blinding. If you want more power, beyond a certain point, you need to run more fibres in parallel.

Mike.

There is a very hard physical limit to the possible power densities. At a few kW per square mm, the glass core of the fibre softens and melts. This in effect destroys the waveguide nature of the fibre, so the only way that power handling can be increased is to expand the diameter of the region carrying the energy- which makes it very multimode. More or less standard multimode fibre with active optical core diameters of ~ 0.1mm might reliably manage 4 or 5 watts of optical power at most - while if that was directed in a single mode fibre, the core would be melted. Converting that back to electrical energy is not especially efficient either.  While the technology may be optimized a bit, I'm not aware of any changes to the underlying physics. There is also the optical hazard to consider - firing more than milliwatts into the human eye is irreversibly blinding. If you want more power, beyond a certain point, you need to run more fibres in parallel.

Mike.