Don't forget to lay a warning tape over the length; "cable below"...
I believe the argumentative poster simply doesn't understand WiFi, FTTP and VoIP or is trolling.
FTTP terminates in the customer premises at an optical network termination (ONT) box which needs permanent power - there may be a small fibre junction/optical coupler box on the outside or inside of the premises where the network provider's (NP) external armoured cable changes into a more manageable fibre cable with a smaller bend radius. The ONT typically provides a gigabit ethernet output via a CAT5e/CAT6 RJ45 female connector which then is connected to the customer router - this may the customer's own router, e.g. from TP Link, Ubiquiti etc. or a service provider's (SP) router e.g. a BT SmartHub. WiFi etc. is downstream of the ONT.
The ONT and everything upstream of it are the exclusive responsibility of the NP and the customer must not interfere with that kit. Splicing fibre, whether single or multi-mode, requires specialised training and very expensive kit.
The issue here is straight-forward:
- The customer has FTTP
- The customer cannot & must not interfere with the cable
- The cable crosses the customer's driveway
- The customer wants to resurface the driveway without damaging the already buried cable
Pretty simple really - it's a civil engineering problem and nothing to do with exotic physics.
I would do something like use an inverted French Drain channel or one of the other split-conduit options, but the main thing would be to bury the cable as deep as you can and surround it with a soft, uniform, medium like sand - electrical cables should be a minimum 450mm below ground (with a warning tape above). There are no hard-and-fast rules for fibre, but the deeper the better and a conduit is an extra plus... and DO put a warning tape above it!