2. The wavelength response of the cascaded AWG spectrometer is calibrated with a tunable laser. Free space OCT measurements are done with a mirror as sample. The signal-to-noise ratio is ~77 dB. Due to the ~three times larger optical bandwidth incident on each CCD pixel, the sensitivity rolls off faster in depth than based on the spectral sampling interval. The axial resolution of the OCT system is determined at 5.9 ± 0.4 μm. We demonstrate the imaging capabilities of this PIC based system by imaging a multilayered phantom. Our results show the basis for the development of a handheld OCT system based on PIC technology, thereby facilitating the development of more applications of OCT.">

Decreasing the Size of a Spectral Domain Optical Coherence Tomography System With Cascaded Arrayed Waveguide Gratings in a Photonic Integrated Circuit (original) (raw)

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