Single channel optical coefficient data

A system comprising:

• an illuminator;
• an optic fiber having a length between a first end of the optic fiber and a second end of the optic fiber, wherein the first end is operatively connected to the illuminator for transmitting illumination along the length of the optic fiber;
• an optical sensor operatively connected to the second end for reflecting sensor returns of the illumination back along the length of the optic fiber;
• a set of fiber Bragg grating (FBGs) formed in the optic fiber between the first end and the optical sensor, wherein the FBGs are configured for reflecting FBG returns of the illumination back along the optic fiber to the first end;
• a delay span in the optic fiber between the FBGs and the optical sensor;
• and
• a interrogator operatively connected to the first end to receive the sensor returns and the FBG returns from the optic fiber, wherein the delay span has a length along the fiber that is configured to create a delay between when the interrogator receives the FBG returns and when the interrogator receives the sensor return, wherein the interrogator is configured to convert a combination of the FBG returns and the sensor returns into engineering units as output indicative of a measurement of a measurand at the optical sensor.