1. Chip based common-path optical coherence tomography system with an on-chip microlens and multi-reference suppression algorithm

    Chip based common-path optical coherence tomography system with an on-chip microlens and multi-reference suppression algorithm

    We demonstrate an integrated optical probe including an on-chip microlens for a common-path swept-source optical coherence tomography system. This common-path design uses the end facet of the silicon oxynitride waveguide as the reference plane, thus eliminating the need of a space-consuming and dispersive on-chip loop reference arm, thereby obviating the need for dispersion compensation. The on-chip micro-ball lens eliminates the need of external optical elements for coupling the light between the chip and the sample. The use of this lens leads to a signal enhancement up to 37 dB compared to the chip without a lens. The light source, the ...

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