On-chip spectrometer for low-cost optical coherence tomography

A. Nitkowski, K. Preston, N. Sherwood-Droz, B. Schmidt, A. Hajian
Tornado Spectral Systems, US

Keywords: spectrometer, planar lightwave circuit, waveguide, optical coherence tomography

Summary:

Tornado Spectral Systems has developed a new spectrometer called OCTANE, the Optical Coherence Tomography Advanced Nanophotonic Engine, consisting of chip-based spectrometers for spectral domain optical coherence tomography (SD-OCT) systems. These devices include planar lightwave circuits with integrated waveguides fabricated on a planar silicon substrate. Our commercial prototypes include a NIR system centered at 860 nm, a bandpass of 70 nm, and 2048 output channels that can record TE and TM polarizations independently at an 80 kHz line scan rate. Intended to support low-cost, high-volume applications, these spectrometers are well-suited to SD-OCT for both biological and industrial non-destructive testing applications.