Abstract
We measured the divergence angles of supercontinuum fiber sources from various types of silica fibers in the spectral range from 0.5 to 2.3[Formula: see text][Formula: see text]m, covering almost the entire range of supercontinuum that can be generated from silica fibers. The divergence angle of the supercontinuum directly output from the photonic crystal fibers (PCFs) increases monotonously with the increase of the wavelength. The divergence angle of the supercontinuum after transmitting through single-mode fibers, including HI1060, SMF-28 and 10/130 fibers, increases firstly and decreases then with the increase of the wavelength. The turning point is different for the three kinds of fibers. The beam parameter product (BPP) increases monotonously with wavelength for both the PCF and the single-mode fibers. Theoretical calculations are also made for the mentioned four types of fibers. The divergence angle of supercontinuum after transmitting through multimode fibers with 50, 100 and 200[Formula: see text][Formula: see text]m core diameters is also measured, which varies in a certain range without obvious rules depending on the wavelength.
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