Optical fiber based optical radiation modulation device

An optical radiation modulation device, comprising:

• a plurality of optical fibers arranged optically in parallel;
• a first coupler coupled with the plurality of optical fibers, the first coupler being operable to receive a single-wavelength optical radiation and to provide or distribute the single-wavelength optical radiation to the plurality of optical fibers to produce optical radiations according to a predefined energy ratio, the optical radiations comprising at least one multi-wavelength optical radiation;
• a second coupler optically coupled with the plurality of optical fibers, the second coupler being operable to receive the optical radiations outputted by the plurality of optical fibers;
• and
• an output coupler optically coupled with the second coupler, the output coupler being configured to optically couple with an imaging device to provide the optical radiations outputted by the plurality of optical fibers to the imaging device,
• wherein the plurality of optical fibers comprise:
• a first optical fiber operable to modulate the single-wavelength optical radiation provided or distributed to the first optical fiber to generate a multi-wavelength optical radiation for output to the second coupler;
• and
• a second optical fiber,
• wherein the optical radiations from the output coupler are provided to an object or a subject being imaged to stimulate corresponding photoacoustic signals from the subject or the object, and the photoacoustic signals are extracted by an algorithm using the predefined energy ratio for analyzing functional parameters associated with the object or the subject, and
• wherein the optical radiation modulation device is configured to output multi-wavelength optical radiations by the plurality of optical fibers without optical elements for filtering.