Application of a digital phase comparator technique to interferometer data

Jiang, Y.; Brower, D. L.; Zeng, L.; Howard, J.
January 1997
Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p902
Academic Journal
Describes the application of a high-speed phase-comparator technique to interferometer data. Direct digitation of the probe and reference wave forms; Demodulation technique and aliasing; Plasma density.


Related Articles

  • Chirped pulse interferometry for time resolved density and velocity measurements of laser produced plasmas. Prasad, Y. B. S. R.; Barnwal, S.; Naik, P. A.; Chakera, J. A.; Gupta, P. D. // Journal of Applied Physics;Jul2011, Vol. 110 Issue 2, p023305 

    An optical diagnostic method to record the evolution of plasma density on picosecond time scale with ∼8 ps resolution in a single shot is presented. A chirped laser pulse of 200 ps is used for obtaining the time resolved interferograms to provide the temporal evolution of plasma density...

  • Novel scanning interferometer for two-dimensional plasma density measurements. Howard, John // Review of Scientific Instruments;Mar90, Vol. 61 Issue 3, p1086 

    A novel multichannel scanning interferometer designed for tomographically inferring contours of electron density in magnetically confined plasmas is described. The scanning element is a multisectored blazed rotating grating. The diffracted beam emerges at a different angle from each sector,...

  • Development of a FIR interferometer for ATF: Part I—High-power FIR laser development. Casson, W. H.; Hutchinson, D. P. // Review of Scientific Instruments;Aug1986, Vol. 57 Issue 8, p1998 

    A FIR interferometer system for the Advanced Toroidal Facility (ATF) at Oak Ridge National Laboratory has been developed with some major modifications to previous designs used at ORNL.Due to the highly elliptical cross section of the plasma and the projected plasma densities, 1 15-channel...

  • Martin–Puplett multichannel far infrared heterodyne interferometer on the Helicity Injected Torus II. Jewell, Patrick D.; Smith, Roger J.; Jarboe, Thomas R. // Review of Scientific Instruments;Jan2003, Vol. 74 Issue 1, p80 

    A novel multichannel implementation of the Martin-Puplett interferometer (MPI) configuration designed for plasma density measurements on the Helicity Injected Torus II (HIT-II) device is described. It is believed that the system represents the first use of a Martin-Puplett interferometer as a...

  • A novel scheme of laser interferometer-refractometer with high spatial and temporal resolutions. Lisitsyn, I.V.; Kohno, S.; Akiyama, H. // Review of Scientific Instruments;Dec1997, Vol. 68 Issue 12, p4353 

    Describes a scheme combining interferometer and refractometer for simultaneous plasma density and plasma density gradient measurements. Use of ribbon laser beam obtained from one-dimensional laser beam expansion by a pair of cylindrical lenses; Role of the beam deflection measurements on the...

  • Plasma density measurement using a simple microwave technique. Bora, D.; Atrey, P. K. // Review of Scientific Instruments;Oct88, Vol. 59 Issue 10, p2149 

    We describe a simple method of determining the plasma density unambiguously with the help of a microwave interferometer. The frequency of the Klystron source is modulated with the help of a staircase voltage pulse. The height of each staircase is adjusted in such a way that the corresponding...

  • Effect of laser beam deflection on the accuracy of interferometer measurements Lisitsyn, I.V.; Lisitsyn, I. V.; Kohno, S.; Katsuki, S.; Akiyama, H. // Review of Scientific Instruments;Apr98, Vol. 69 Issue 4, p1584 

    Investigates the use of laser interferometry for plasma density measurements. Change in interferometer contrast due to scene beam deflection; Maximum acceptable deflection angle; Laser beam deflections in the media with refraction index gradients.

  • The use of high-order TM0m0 modes of a resonant cavity for magnetized plasma density measurements. Paris, P. J.; Sawley, M. L.; Tran, M. Q.; Voser, K. // Journal of Applied Physics;1/1/1990, Vol. 67 Issue 1, p124 

    Reports on the application of high-order modes of a resonant cavity for magnetized plasma density measurements. Comparison between densities and microwave interferometry; Application of a resonant cavity to the measurement of plasma density; Schematic diagram of the high frequency resonant cavity.

  • Precision Phase Discriminator for the Heterodyne Interferometric Plasma-Density Measurement Technique. Zubarev, P. V.; Khil'chenko, A. D. // Instruments & Experimental Techniques;Mar/Apr2003, Vol. 46 Issue 2, p171 

    The discriminator is intended for the plasma density recording systems based on optical heterodyne interferometry. The discriminator has a high phase resolution (10–3 rad) and a virtually unlimited dynamic range in a modulation band of up to one-half of the carrier frequency (1 MHz)....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics