ROV fibre optics

Greetings all,
new to this forum and wondering if anybody has played with fibre optic tethers, I am thinking of adding one to the bluerov2 as an additional 4k camera. 300m is where I need to go and fibre hdmi seems to jump some hurdles.
feedback would be great

ricci

hdmi to fiber

Something like this? (I’m still new to this group myself and haven’t seen anything on what they use yet)