Method and apparatus for performing spread spectrum optical spectroscopy

An apparatus, comprising:

• a detector for receiving, from a medium, a second set of optical signals wherein the second set of optical signals comprise demultiplexed signals that have propagated through the medium, wherein light is modulated to generate a first set of optical signals, wherein the first set of optical signals are demultiplexed by splitters and optical delays into the demultiplexed signals, wherein the demultiplexed signals are launched into the medium, and wherein the medium has a characteristic of being bulk and diffusing;
• a multiplexor for multiplexing at least a portion of the second set of optical signals to generate one or more multiplexed signals;
• a converter for obtaining one or more electrical signals according to one or more measurements of one or more optical fields of the one or more multiplexed signals, wherein the obtaining includes coherent detection using at least a portion of the light;
• and
• signal processing circuitry for generating one or more point spread functions from the one or more electrical signals.

A method, comprising:

• receiving, from a medium, a second set of optical signals as a result of demultiplexed signals propagating through the medium, wherein light is modulated to generate a first set of optical signals, wherein the first set of optical signals are demultiplexed into the demultiplexed signals by way of splitters and optical delays, wherein the demultiplexed signals are launched into the medium, and wherein the medium has a characteristic of being bulk and diffusing;
• multiplexing at least a portion of the second set of optical signals to generate one or more multiplexed signals;
• obtaining one or more electrical signals according to one or more measurements of one or more optical fields of the one or more multiplexed signals, wherein the obtaining-involves includes coherent detection using at least a portion of the light;
• and
• generating one or more point spread functions from the one or more electrical signals.