Indexing signal detection module

An apparatus for transmitting an optical signal emission from the contents of each of a plurality of receptacles, said apparatus comprising:

• a processing module configured to hold the plurality of receptacles;
• a plurality of signal transmission conduits, each signal transmission conduit comprising an optical fiber coupled to the processing module to transmit an optical signal emitted by the contents of an associated one of the plurality of receptacles between a first end and a second end thereof, wherein each of the plurality of signal transmission conduits transmits both an excitation and an emission signal;
• and
• a conduit reformatter constructed and arranged to secure the first ends of the respective signal transmission conduits in a first spatial arrangement corresponding to a spatial arrangement of the plurality of receptacles held within the processing module, such that the first end of each signal transmission conduit is positioned to receive an emission signal emitted by the contents of the associated receptacle, and to secure the second ends of the respective signal transmission conduits in a second spatial arrangement different from the first spatial arrangement.