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Proceedings Paper

Wide-band supercontinuum generation for sub-micron-resolution OCT by using a laser-diode-seeded amplified pulse source
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Paper Abstract

We present an ultra-wideband supercontinuum source using a dispersion-shifted fiber and an amplified diode-laser pulse source. A gain-switched DFB laser operating at 1550-nm wavelength, which provides 30-ps pulses, was used for generating the seeding pulses. And serially cascaded low-cost EDFAs were employed to boost the peak power of the pulses to more than 1 kW. Single-mode supercontinuum spanning nearly the full near-IR band was obtained by passing the amplified pulses through a dispersion-shifted fiber. By investigating the characteristics of the generated supercontinuum pulses, the walk-off between the spectral components was found to limit the effective interaction length of the spectrum-broadening effects. In order to expand further the spectral range of the output, we have examined the time-gating ASE suppression scheme and use of a high-power EDFA. And the resulted outputs have reached wavelengths of 0.8 and 0.9 μm, respectively at the short-wavelength edges. Only the blue-shifted part that can be obtained using a short-wavelength-pass filter can exhibit 3-dB bandwidth more than 500 nm in the vicinity of 1.2 μm. The supercontinuum generation scheme provides a compact and reliable way to generate ultra-wideband flat spectrum that can be useful for high-resolution OCT.

Paper Details

Date Published: 10 February 2006
PDF: 8 pages
Proc. SPIE 6103, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications V, 61030Y (10 February 2006); doi: 10.1117/12.645904
Show Author Affiliations
Sucbei Moon, Gwangju Institute of Science and Technology (South Korea)
Dug Young Kim, Gwangju Institute of Science and Technology (South Korea)


Published in SPIE Proceedings Vol. 6103:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications V
Peter E. Powers, Editor(s)

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