In this paper, we presented the results of bend loss measurements for single-mode optical fiber over wide bend radius 1mm ~ 8mm and wavelength 1530nm ~ 1565nm. The oscillations caused by the coupling between the whispering gallery mode propagating in the cladding and the buffer and the core guided fundamental mode was observed versus both bend radius and wavelength. And a good agreement between the experimental results and the theoretical numerical evaluation was obtained.
Using a spectrum-sliced device composed of two cascaded fiber Bragg gratings, a novel multiwavelength fiber light source is manufactured based on broadband amplified spontaneous emission from Er-doped fiber. Two channels incoherent light near 1550nm with FWHM of 0.23nm, 0.45nm, respectively, output power of above 1mW are obtained. Using this fiber amplifier light source, we transmit a 34Mb/s incoherent light signal over 10 Km single-mode standard fiber. The error floor level is less than 10-9.
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