Full-field swept-source optical coherence tomography with Gaussian spectral shaping

Satish Kumar Dubey; Gyanendra Sheoran; Tulsi Anna; Arun Anand; Dalip Singh Mehta; Chandra Shakher

doi:10.1117/12.814551

3 October 2008 Full-field swept-source optical coherence tomography with Gaussian spectral shaping

Satish Kumar Dubey, Gyanendra Sheoran, Tulsi Anna, Arun Anand, Dalip Singh Mehta, Chandra Shakher

Proceedings Volume 7155, Ninth International Symposium on Laser Metrology; 71551F (2008) https://doi.org/10.1117/12.814551
Event: Ninth International Symposium on Laser Metrology, 2008, Singapore, Singapore

Abstract

A swept source system was realized in the wavelength range of 810-875 nm with the combination of a broad-band superluminescent diode (SLD) and an acousto-optic tunable filter (AOTF) as a frequency-tuning device. SLD has two spectral centers at 820 nm and 845 nm with spectral bandwidth (FWHM) of around 40 nm. Gaussian spectral shaping was performed onto the original SLD spectrum while reconstructing OCT images for various test samples such as onion slice and fingerprint impression taken on a glass substrate. As a pulse can be considered a Gaussian distribution of frequencies, spectral shaping yields sharper Fourier peaks. Application of Gaussian spectrum facilitates in precisely locating the reflective boundaries within the sample that results in improved OCT images.

Citation Download Citation

Satish Kumar Dubey, Gyanendra Sheoran, Tulsi Anna, Arun Anand, Dalip Singh Mehta, and Chandra Shakher "Full-field swept-source optical coherence tomography with Gaussian spectral shaping", Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 71551F (3 October 2008); https://doi.org/10.1117/12.814551

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