Low Cost High Efficiency Signal Interrogation For Multi-Channel Optical Coherence Tomography
A signal interrogation system comprises an optical coupler (22) to split input laser beam into a first laser beam as a power reference and a second laser beam, the optical coupler being coupled to a first path (24) for the first laser beam and a second path (25) for the second laser beam; an optical circulator (28) disposed in the second path; a bi-directional optical switch (30) disposed in the second path and having on one side a single channel end oriented toward the optical circulator and on another side multiple channel ends with multiple switchable channels; a plurality of ...
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