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Showing papers on "Waveplate published in 1978"


Patent
27 Dec 1978
TL;DR: In this paper, the authors proposed a non-confining to confining mode converter using dielectric parallel sided plates having a metal coated face forming a mirror, which can convert a linear-polarized wave to a circular polarized wave.
Abstract: Laser device emitting a far infrared wave beam having a mode confining for charged particles. The laser devices of this kind generally emit circular polarized wave beams in which the phase shift of the radioelectric oscillation at a point having a given azimuth with respect to the beam axis is proportional to the azimuth. They comprise a quarter wave plate for converting a linear-polarized wave to a circular polarized wave and a non-confining to confining mode converter. The known converters use birefringent materials but there is no birefringent material available in the far infrared range. The present non-confining to confining mode converter uses dielectric parallel sided plates having a metal coated face forming a mirror.

24 citations


Patent
19 May 1978
TL;DR: A gas discharge laser includes one or more birefringent layers in a multi-layer reflector that provides such a large difference in reflection of light polarized linearly in two mutually perpendicular directions that the laser generates 100% linearly polarized light in one direction only.
Abstract: A gas discharge laser includes one or more birefringent layers in a multi-layer reflector that provides such a large difference in reflection of light polarized linearly in two mutually perpendicular directions that the laser generates 100% linearly polarized light in one direction only. In the other directions the reflection is insufficient to obtain stimulated emission.

9 citations


Journal ArticleDOI
TL;DR: In this article, a circularly polarized light wave is transmitted through the flow-birefringent medium, and the transmitted elliptically polarized wave is compensated by a Babinet-Soleil plate to convert it back into a roundly polarized wave.
Abstract: A method of measuring flow-birefringence is reported. In this method, a circularly polarized light wave is transmitted through the flow-birefringent medium. The transmitted elliptically polarized wave is compensated by a Babinet-Soleil plate to convert it back into a circularly polarized wave. The state of circular polarization is confirmed using the rotating-analyser method. Measurements can be carried out with a sample having a fixed azimuth. The minimum detectable optical retardation angle was 5 × 10 -3 degree. This corresponds to a birefringence of Δ n = 1 × 10 -10 , when the optical path length of the sample cell is 100 mm.

5 citations


Patent
05 Sep 1978
TL;DR: A rotation sensitive ring laser system comprising an optical loop including a polarizing beam splitter in the loop, the laser gain medium being outside the loop and a quarter wave plate in the path of light emanating from the loop for converting the light into linearly polarized light, the plane of polarization of which is rotating at an angular rate proportional to the angular rate with which the system is rotating in inertial space is described in this article.
Abstract: A rotation sensitive ring laser system comprising an optical loop including a polarizing beam splitter in the loop, the laser gain medium being outside the loop, and a quarter wave plate in the path of light emanating from the loop for converting the light into linearly polarized light, the plane of polarization of which is rotating at an angular rate proportional to the angular rate with which the system is rotating in inertial space.

4 citations


Journal ArticleDOI
S. Saikan1
TL;DR: In this paper, the dependence of intensity-dependent polarization change of the elliptically polarized light in atomic resonance lines was studied both theoretically and experimentally, and the effect of the intensity dependence on the polarization change was investigated.
Abstract: J-dependence of intensity-dependent polarization change of the elliptically polarized light in atomic resonance lines is studied both theoretically and experimentally.

3 citations