The Polarization converter can be driven with one or two standard laboratory function generators but it can also be driven the USB ARCoptix LC Driver.The Arcoptix LC (Liquid Crystal) driver is a USB computer controlled electrical power supply optimized for driving the polarization converter. The variable phase retarder (phase step compensation) and the TN cell (switch between azimuthal and radial polarization) inside the polarization converter can be driven with the two outputs of the LC Driver.
The LC driver has two independent outputs (Lemo connectors). They are controlled via a simple windows compatible software. The output has a variable square amplitude with polarity inversion and a frequency of 1.6 KHz. This guarantees a homogenous variation of the LC layer inside the cell. An external trigger input can be provided on demand.
We have already sold our radial polarization converter all over the world. Some groups have already obtained interesting results, here are some references of articles where the LC radial polarization converter has been used:
1) M. Stalder and M. Schadt, "Linearly polarized light with axial symmetry generated by liquid-crystal polarization
converters," Opt. Lett. 21, p. 1948- (1996)
2) S.F Periera and al. “Frequency spectra and waveguiding of a family of daisy modes in vertical-cavity
surface-emitting lasers”, opt. comm. 179, p.485, (2000).
3) E. Descrovi and al., “Collection of transverse and longitudinal fields by means of apertureless nanoprobes with different metalic coating characteristics”, appl. phys. lett. 85 (22), p. 5340, (2004).
Articles may be obtained upon request.
4) J. S. Ahn, H. W. Kihm, J. E. Kihm, D. S. Kim, and K. G. Lee, "3-dimensional local field polarization vector mapping of a focused radially polarized beam using gold nanoparticle functionalized tips", Optics Express, Vol. 17, 14, P.2280 (2009).
5) D. Ivanov, V. Shcheslavskiy, I. Märki, M. Leutenegger and T. Lasser, "High volume confinement in two-photon total-internal-reflection fluorescence correlation spectroscopy", appl. phys. lett. 94, 083902-1 (2009).
6) R. Martinez-Herrero, P.M. Mejias *, G. Piquero, V. Ramirez-Sanchez, "Global parameters for characterizing the radial and azimuthal polarization content of totally polarized beams", Optics Communications 281, p. 1976–1980, (2008).
7) H. Tomizawa, H. Hanaki, T. Ishikawa,"NON-DESTRUCTIVE SINGLE-SHOT 3-D ELECTRON BUNCH MONITORWITH FEMTOSECOND-TIMING ALL-OPTICAL SYSTEM FOR PUMP & PROBE EXPERIMENTS", Proceedings of FEL 2007, Novosibirsk, Russia.