Basically, Harmonic Technology's Light Analog Module (LAM) Photon Transducer is a tiny module built into the cable right at the RCA or XLR plugs. The LAM converts voltage to laser light, which is then transmitted via audio-grade glass fiber to a receiver in line with the RAC or XLR plug at the other end of the line, which converts the light back to voltage. Once the conversion to light has taken place, the light moves at, of course, the speed of light (ca 186,000 miles per second), with no resistance, capacitance, "skin effect," inductance, RFI or EMI reception, etc. You needn't worry about crossed power cords or static electricity; dressing cables to prevent induced hum or keeping them off the floor become nonissues. In fact, Harmonic Tech claims no signal loss of any kind in cable runs of up to 200 meters. And with no conductive wires between components, all potential ground loops are eliminated.
I would suggest the Cable Owner if the Root Cause of this Cable being destroyed in relation to sending Voltage at the Speed of Light.
The info above has been found in five minutes and a Technician would be finding the content very enlightening 'pardon the pun'.
Would the Tech' have commenced to undertake invasive tasks, when knowing certain connections when detached would be left detached unless more was known.
A Fibre Optics Technician, one who endlessly terminates fibres as their daily task for a Phone Company may see a sensible approach, a method that is adequate as a repair might be suggested. I don't see this type of individual beating one up on the price asked, if a price is given, a Latte might be enough to keep things sweet.