Publication
Highly birefringent silicate glass photonic-crystal fiber with polarization-controlled frequency-shifted output: A promising fiber light source for nonlinear Raman microspectroscopy |
Mitrofanov A.V., Linik Y.M., Buczynski R., Pysz D., Lorenc D., Bugar I., Ivanov A.A., Alfimov M.V., Fedotov A.B., and Zheltikov A.M. |
Optics Express14(22), 2006, 10645-10651, 10.1364/OE.14.010645 |
A highly birefringent silicate glass photonic-crystal fiber (PCF) is employed for polarization-controlled nonlinear-optical frequency conversion of femtosecond Cr: forsterite laser pulses with a central wavelength of 1.24 μm to the 530╍720-nm wavelength range through soliton dispersion-wave emission. The fiber exhibits a modal birefringence of 1.2·10-3 at the wavelength of 1.24 μm due to a strong form anisotropy of its core, allowing polarization switching of the central wavelength of its blue-shifted output by 75 nm. Polarization properties and the beam quality of the blue-shifted PCF output are shown to be ideally suited for polarization-sensitive nonlinear Raman microspectroscopy.