A novel elliptical ring fiber structure mode selective coupler is proposed and it can convert LP01 mode to higher-order modes (LP11a,LP11b,LP21a,LP21b) with the maximum coupling efficiency 99% in wavelength range from 1530nm to1625nm (C+L band).
A spectral sliced multiwavelength laser source which utilizes supercontinuum generated in a high nonlinear dispersion
flattened holey fiber(HNL-DF-HF) and spectral slicing in an arrayed waveguide grating has been demonstrated. All 32
channels exhibit almost constant pulsewidth, the channel separation is 100GHz, and crosstalk of the adjacent channels is
more than 25dB.
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