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Speckle-Enhanced Prism Spectrometer

2019    Cetindag, S. Kaan; Ferhanoglu, Onur; Toy, M. Fatih; Civitci, Fehmi

We present an improved prism spectrometer with high wavelength range and spectral resolution. The device is an upgraded prism spectrometer that utilizes an additional scattering medium leading to a wavelength-dependent speckle pattern. We demonstrate < 20 pm resolution and similar to 750 nm wavelength range with the proposed device. With the demonstrated spectral resolution, the speckle-enhanced prism could provide the means to image deep tissue layers in Optical Coherence Tomography.