Gian prisms

Fig. 23. Experimental set-up of the Gwatt photochemical iodine laser (a). The pulsecutting system after the oscillator consists of a Pockels cell and Gian prism. The Pockels cell is switched by a spark gap which is triggered by the laser light deflected from the prism. Gain can be measured by the diodes Di.Dg. The duration and sequencing of the flashlamp pulses for pumping the three stages and the switching time of the oscillator are indicated in part (b) of the figure...

Fig. 1. Z-scan set-up. Nd-YAG+SHG - pulse laser, DL - Dye laser, L1-L4 -lenses, A -Aperture diaphragm, P - Gian prism, IF - interference filter, C- compensator of the beam shift, ANF- adjusted neutral filter, PD-photodiode.

FIG. 1. The experimental arrangement BS, beam splitter VA, variable attenuator BSC, Babinet-Soleil compensator LC, liquid crystal AOM, acousto-optic modulator PR, polarization rotator P, Gian prism polarizer. 

An apparatus for electric birefringence measurements is shown schematically in Fig. 9.16 [288]. Rectangular high-voltage pulses of short duration are applied to the solution, and the buildup and decay of electric birefringence are measured. The beam of an He-Ne laser is polarized by a Gian prism set at 45° with... 

The polarimeter was commissioned on the nights 1993, May 4 5. The results show that (1). The polarization efficiency is 100% from 1 to 2.4/im (as measured using a Gian prism). (2). The instrumental polarization is (0.02 0.06)%. (3). The polarization measurements for a number of standard polarized stars taken from Whittet et al. (1992) gave excellent agreement with an rms scatter of 0.15%. 

Figure 4.17 Experimental setup for forming the polarization grating in photoahgnmg layer SDl X/2, half-wave plate for power balance between interfering beams BE, beam expander BS, beam splitter PG, Gian prism X/4, quarter-wave plates [57]. Reproduced from V. Presnyakov, K. Asatiyan, T. Galstian, and V. Chigrinov, Optical polarization grating induced liquid crystal micro-structure using azo-dye command layer. Optics Express 14, 10558 (2006), Optical Society of America...

Figure 1 OHD-RIKES experimental setup. DX = Doubling crystal GLP = Gian laser polarizer GTP = Glan-Thompson polarizer HWP = half-wave plate PD = photodiode PDC = prism dispersion compensator QWP = quarter-wave plate SF = spatial filter. (From Ref. 34.)...

Polarized radiation may be produced rather more easily than at longer wavelengths, by the use of a Gian Thompson prism or, over part of the range, by Polaroid. 

The set-up is similar to the one used in normal saturation spectroscopy but the probe beam is now blocked by crossed polarizers that are placed at opposite sides of the absorption ceU. The polarizer in front of the cell is used to increase the linear polarization of the laser beam, which is frequently already well polarized. A matched pair of polarizers (frequently Gian-Thompson prisms. Fig. 6.46) can have a rejection ratio of 10 to 10 in the crossed position. The pump beam is circularly polarized and induces an anisotropy... 

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