Abstract
We demonstrate a Fourier-domain mode-locked wavelength-swept laser that uses a polygon-based narrowband optical scanning filter and a high-efficiency semiconductor optical amplifier. Peak and average output powers of 98 mW and 71 mW have been achieved, respectively, without an external amplifier, while the wavelength was swept continuously from 1247 nm to 1360 nm. A unidirectional wavelength sweeping rate of 7452 nm/ms (65.95 kHz repetition rate) was achieved by using a 72 facet polygon scanner with a rotation rate of 916 revolutions per second. The instantaneous linewidth of this laser is 0.09 nm, which corresponds to a coherence length of 16 mm. This laser is most suitable for optical coherence tomography applications.
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