Elongation and heat indicating synthetic fiber rope

A process for ascertaining the elongation of a load-bearing cable without using a loose tube fiber-optic construction, the process comprising steps of:

• a) disposing a Raman backscattering wavelength transmission capable fiber-optic conductor in a helix form and firmly affixed to a core interior the cable in combination with a distinct other fiber-optic conductor capable of being used to transmit Brillouin scattering wavelengths and where the distinct other fiber-optic conductor also is disposed in a helix form and also is firmly affixed to the core interior the cable, both fiber-optic conductors being completely encased in a solid, flexible thermoplastic material each in its helix shape and each firmly affixed to and within the core, the core comprising solid, flexible thermoplastic material;
• b) using heat values obtained by interpretation of Raman backscattering readings from Raman backscattering wavelengths transmitted along the fiber-optic conductor capable of transmitting Raman backscattering wavelengths in combination with data obtained from Brillouin scattering readings from Brillouin scattering readings transmitted along the fiber-optic conductor capable of transmitting Brillouin scattering wavelengths in order to permit calculating elongation of the optical fiber transmitting the Brillouin scattering wavelengths;
• and,
• c) then, by mathematical calculation taking into account the helical shape of the fiber-optic conductor transmitting the Brillouin scattering wavelengths, to calculate the elongation in a monitored region of the cable of the helical structure formed by the fiber-optic conductor transmitting the Brillouin scattering wavelengths, and thereby ascertain elongation of the cable in the monitored region of the cable.