Methods and systems for downhole telemetry

A downhole telemetry system, comprising:

• a surface data acquisition unit comprising a surface telemetry unit;
• a downhole optical telemetry cartridge comprising a downhole electro-optic unit;
• at least one fiber optic interface between the surface data acquisition unit and the downhole optical telemetry cartridge;
• a downhole tool;
• and
• a downhole electrical tool bus operatively connected between the downhole electro-optic unit and the downhole tool, wherein
• the downhole electro-optic unit comprises:
• a remotely pumped laser optically connected, via an optical fiber, to a surface pump laser,
• the downhole optical telemetry cartridge being configured to operate downhole, within a borehole, at temperatures in excess of about 115 degrees Celsius.

A subterranean tool configured to operate at elevated temperatures, in excess of about 115 degrees Celsius, downhole in a well traversing a formation, comprising:

• a downhole telemetry cartridge configured for downhole use at temperatures in excess of about 115 degrees Celsius;
• at least one downhole light source optically connected to the telemetry cartridge, wherein
• the light source comprises one or more remotely pumped lasers, the downhole remotely pumped lasers being optically connected, via at least one optical fiber, to a surface pump laser;
• and
• at least one sensor or transducer configured for sensing parameters of the formation and changing a predetermined characteristic of the one or more remotely pumped lasers based on the sensed parameters.