Spectral domain optical coherence tomography using a microchip laser-pumped photonic crystal fiber supercontinuum source

Qi Zhao; Takashi Buma

doi:10.1117/12.763914

18 February 2008 Spectral domain optical coherence tomography using a microchip laser-pumped photonic crystal fiber supercontinuum source

Qi Zhao, Takashi Buma

Author Affiliations +

Proceedings Volume 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII; 68472M (2008) https://doi.org/10.1117/12.763914
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

We report spectral domain optical coherence tomography (SDOCT) with a supercontinuum source based on a photonic crystal fiber pumped with nanosecond laser pulses. The Q-switched Nd:YAG microchip laser produces 0.6 ns duration pulses at 1064 nm with 8 μJ of energy at a 6.6 kHz repetition rate. These pulses are sent through 3 m of photonic crystal fiber with a zero dispersion wavelength of 1040 nm. The fiber output is coupled into a fiber-based SDOCT system operating at a central wavelength of 800 nm. The A-line acquisition rate is 6.6 kHz, where each A-line is produced by a single supercontinuum pulse. Point spread function measurements show excellent resolution, but sensitivity is degraded by spectral fluctuations of individual supercontinuum pulses. Test images show less dynamic range compared to a Ti:Sapphire femtosecond laser based system. However, this supercontinuum source has potential for stroboscopic illumination in time-resolved low coherence interferometry.

Citation Download Citation

Qi Zhao and Takashi Buma "Spectral domain optical coherence tomography using a microchip laser-pumped photonic crystal fiber supercontinuum source", Proc. SPIE 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 68472M (18 February 2008); https://doi.org/10.1117/12.763914

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