Optical sources at 1.7μm region of optical coherent tomography(OCT)can reduce scattering and absorption in tissue,and enhance the imaging depth.A 300 mlong high nonlinear optical fiber and a 10 km long dispersion shifted fiber are pumped by amplified spontaneous emission(ASE)beam to generate continuous spectrum.The continuous light source at peak wavelength of 1675 nm and 10 dB linewidth of 75 nm can be achieved after erbium-doped fiber absorption,by adjusting the peak wavelength and power of the tunable fi...
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