Full-field optical coherence tomography with an acousto-optically tuned external-cavity laser diode

Takamasa Suzuki; Nariyasu Sugawara; Samuel Choi

doi:10.1117/12.2547786

20 December 2019 Full-field optical coherence tomography with an acousto-optically tuned external-cavity laser diode

Takamasa Suzuki, Nariyasu Sugawara, Samuel Choi

Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 1120922 (2019) https://doi.org/10.1117/12.2547786
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China

Abstract

Full-field swept source optical coherence tomography using an acousto-optically tuned external-cavity laser diode is proposed and demonstrated. The wavelength of the light source is controlled by diffraction in an acousto-optic modulator, instead of by mechanical motion. This allows tuning rates of over 100 kHz without mode hopping. For phase analysis, we used a continuous wavelet transform. This allows for accurate signal processing that reduces calculation error caused by the nonstationary features of an interference signal. We measured the two-dimensional thickness distribution of a thin glass plate. The average thickness of the glass plate was found to be 152.2 μm.

Citation Download Citation

Takamasa Suzuki, Nariyasu Sugawara, and Samuel Choi "Full-field optical coherence tomography with an acousto-optically tuned external-cavity laser diode", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 1120922 (20 December 2019); https://doi.org/10.1117/12.2547786

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