Supercontinuum light with a spectrum more than two octaves broad (370–1545 nm at the 20-dB level) was generated in a standard telecommunications fiber by femtosecond pulses from an unamplified Ti:sapphire laser. The fiber had been tapered to a diameter of :2μm over a 90-mm length. The pulse energy was 3.9 nJ (average power, 300 mW). This source of high-intensity single-mode white light should find widespread applications in frequency metrology and spectroscopy, especially since no unconventional fibers are needed.
© 2000 Optical Society of America
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(120.3940) Instrumentation, measurement, and metrology : Metrology
(190.4370) Nonlinear optics : Nonlinear optics, fibers
T. A. Birks, W. J. Wadsworth, and P. St. J. Russell, "Supercontinuum generation in tapered fibers," Opt. Lett. 25, 1415-1417 (2000)