We demonstrate tunable spectral enhancement of the supercontinuum generated in a micro structured fiber with a fiber long-period grating. The long-period grating leads to phase distortion and loss that, with subsequent high-intensity propagation in uniform fiber, evolves into an enhancement around the grating's resonant wavelengths. Wavelength tunability is achieved by varying the temperature or the ambient refractive index, and the spectral peak can be extinguished by immersing the grating in index-matching oil.
|Number of pages||3|
|Publication status||Published - 15 Jun 2007|