Downhole Time Domain Reflectometry with Optical Components

A method for downhole time domain reflectometry (TDR), comprising:

• transmitting an optical signal to a downhole environment;
• converting the optical signal to an electrical signal in the downhole environment;
• reflecting the electrical signal using an electrical transmission line in the downhole environment;
• and
• analyzing data corresponding to the reflected electrical signal;
• and
• displaying a result of the analysis.

A downhole time domain reflectometry (TDR) circuit, comprising:

• a transmission line;
• a light detector coupled to the transmission line;
• and
• a light source coupled to the transmission line,
• wherein the light detector is configured to convert an interrogation signal from an optical signal to an electrical signal in a downhole environment, and wherein the light source is configured to convert an interrogation response signal from an electrical signal to an optical signal in the downhole environment.