We report on the development of a 2.5 µm core photonic crystal fiber with a substantially reduced water-peak loss around 1.38 µm, which allows extended Raman-soliton supercontinuum generation up to 1.55 µm with a cw ytterbium fiber laser pump source. The resulting broadband, high-spectral-power-density, low-coherence light source can be employed for advanced, submicrometer resolution optical coherence tomography.
© 2005 Optical Society of America
J. C. Travers, R. E. Kennedy, S. V. Popov, J. R. Taylor, H. Sabert, and B. Mangan, "Extended continuous-wave supercontinuum generation in a low-water-loss holey fiber," Opt. Lett. 30, 1938-1940 (2005)