The present invention provides methods of generating short wavelength radiation, methods of transporting short wavelength radiation, and apparati used in these methods. One embodiment of the invention provides a method of transporting short wavelength radiation using a photonic band gap fiber. Another embodiment of the invention provides a method of transporting short wavelength radiation using a bundle of photonic band gap fibers. Another embodiment of the invention provides a method of generating ultraviolet radiation using high harmonic generation by pumping a noble gas-filled photonic band gap fiber with a pulsed laser source.