Infrared supercontinuum generated in short tapered fiber by pumping around second zero-dispersion wavelength

The supercontinuum is generated by pumping the fiber taper around the first ZDW by applying a femtosecond Ti:sapphire laser. This results in a supercontinuum extending from the blue to near infrared. We propose to pump the tapered fiber with pulses having wavelengths near the second ZDW but still in the anomalous dispersion region of the tapered fiber to generate a supercontinuum extending into far infrared. As a matter of fact due to the opposite curvature of the dispersion compared to when pumping around the first ZDW, phase matched radiation will be generated at far infrared wavelengths.