Apparatus and method for providing mesoscopic spectroscopy co-registered with optical frequency domain imaging

A method, comprising:

• collecting, by a first waveguide, a first electromagnetic radiation;
• collecting, by a second waveguide, a second electromagnetic radiation, wherein the first waveguide is configured to transmit single-mode light and wherein the second waveguide is configured to transmit multimode light;
• and
• combining, by a rotatable combiner optically coupled to the first waveguide and to the second waveguide, the first electromagnetic radiation and the second electromagnetic radiation into a third waveguide,
• the third waveguide being optically coupled to the rotatable combiner, and
• the first waveguide and the second waveguide being rotatably housed in a probe.

An apparatus, comprising:

• a first waveguide and a second waveguide rotatably housed in a probe;
• a rotatable combiner optically coupled to the first waveguide and the second waveguide that optically combines light of the first waveguide and the second waveguide into a third waveguide;
• wherein the third waveguide is optically coupled to the rotatable combiner;
• and
• a rotary junction, the rotary junction comprising the rotatable combiner optically coupled to a rotatable collimator by the third waveguide.