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IEEE Journal of Quantum Electronics

Issue 10 • October 1968

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Displaying Results 1 - 25 of 39
  • [Front cover and table of contents]

    Publication Year: 1968, Page(s): 0
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  • 1968 Quantum Electronics Conference

    Publication Year: 1968, Page(s): 539
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  • Temperature effects on the fluorescence characteristics of RbMnF3:Nd3+

    Publication Year: 1968, Page(s):545 - 552
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    The absorption, excitation, and fluorescence spectra and lifetimes of Mn2+and Nd3+in RbMnF3were investigated in the 5 to 300°K region. The fluorescence of Mn2+in these systems was found to originate from two metastable levels centered at 5820 and 6300 Å. The Nd3+emission appears as two groups of sharp lines centered at... View full abstract»

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  • Tunable Raman up-converter as a coherent generator

    Publication Year: 1968, Page(s):558 - 563
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    This experimental paper describes the operation of simple coherent laser-generated tunable source of medium power (1 to 104watts) in the visible spectrum (15 600 to 19 400 cm-1) with high repetition rate (1 to 20 pps). A broad-band source is created by aQ-switched Nd:YAG laser beam in a cell containing carbon disulphide, by a complex process involving multiple-orde... View full abstract»

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  • Large storage box hydrogen maser

    Publication Year: 1968, Page(s):563 - 568
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (857 KB)

    An atomic hydrogen maser has been operated that confines atoms in a volume whose linear dimensions are approximately ten times larger than those of previous masers of this type. The uncertainties associated with the wall frequency shift, presently the principal limiting factor in the absolute accuracy of frequency measurements with the hydrogen maser, should be reduced with this device, since the ... View full abstract»

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  • Linear dichroism in photochromic CaF2

    Publication Year: 1968, Page(s):575 - 578
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (481 KB)

    Photochromic switching of additively colored La, Ce, Gd, or Tb doped CaF2with linearly polarized UV light and subsequent thermal decay of other photochromic effects leads to a linear dichroism of the two major absorption bands, band 1 (∼4000 Å) and band 2 (∼6000 Å), of the thermally stable state. The dichroism is due to a net reorientation of an anisotropic center ... View full abstract»

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  • Properties of new and useful tungsten-bronze niobates

    Publication Year: 1968, Page(s):584 - 587
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (522 KB)

    It is experimentally shown that the electrooptic properties of the ferroelectric phase of the new tungsten-bronze compositions can be treated as a biased quadratic electrooptic effectg_{ij). This is done by directly measuring the electrooptic behavior above the transition temperature in KSr2Nb5O15. A term linear in electric field is not found. Thus the c... View full abstract»

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  • A mode-locked laser as a light source for Schlieren photography

    Publication Year: 1968, Page(s):593 - 597
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (663 KB)

    Second harmonic radiation from a mode-locked neodymium: glass laser has been used to carry out time-resolved Schlieren studies of sparks produced by focused ruby laser radiation. Synchronization of the two lasers was achieved by means of a spark gap triggered by the neodymium laser radiation, which switched a Pockels cell within the ruby laser cavity. The use of this technique permitted a detailed... View full abstract»

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  • Multiphonon relaxation in laser materials and applications to the design of quantum electronic devices

    Publication Year: 1968, Page(s):609 - 612
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (475 KB)

    An account is given of the results of a recent investigation of multiphonon orbit-lattice relaxation of excited states of rare-earth ions in crystals. The use of these results in the design of quantum electronic devices is discussed, using as examples the Nd3+laser transition and a 10.6-μ infrared quantum counter. A discussion is presented of the infrared limit of quantum electroni... View full abstract»

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  • Study of self-trapped optical beams by high-speed holography

    Publication Year: 1968, Page(s):618 - 621
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    Output of a 10-MWQ-switched Nd3+glass laser was focused into several kinds of liquid media, and the change in the refractive indicesdeltandue to the focused laser beam was observed by means of double exposure holography using aQ-switched ruby laser as the light source. It has been shown that a filament of several 10 μ in diameter and several mm in l... View full abstract»

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  • A fast digitalized scan laser

    Publication Year: 1968, Page(s):648 - 654
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (895 KB)

    An operating 2 × 2 Nd:YAG digital scan laser containing a crossed array of LiNbO3electrooptic switches for mode selection is described. Ultimate output parameters for a complete system include a 1-watt power output to any of approximately7 times 10^{3}spots, with MHz switching speeds. The required mode-selection voltage is under 100 volts, permitting the use of fast tran... View full abstract»

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  • Resonant scattering of monochromatic light in gases

    Publication Year: 1968, Page(s):664 - 666
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The frequency dependence of the differential cross section characterizing the resonant scattering of photons by the atoms of a dilute gas has been investigated. It is supposed that the scatterers are sufficiently dispersed so that interference between different scatterers may be neglected. Elastic collisions between the scatterers and the atoms of a buffer gas are treated in the impact approximati... View full abstract»

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  • Multiphoton ionization of hydrogen and rare gases

    Publication Year: 1968, Page(s):667 - 669
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (319 KB)

    A 400-MW neodymium laser beam is focused in a vacuum chamber filled with a noble gas at about 10-3mmHg. Operation at low pressure permits the isolation of the multiphoton effect from avalanche ionization. The ions produced at the focal point are collected in a Faraday cup. By varying the laser power through the focal point, we plot, in a log-log scale, the number of ions produced agains... View full abstract»

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  • Nonlinear optical coefficients in group IV and III-V semiconductors

    Publication Year: 1968, Page(s):670 - 673
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    In the low-frequency approximation, the magnitude of optical nonlinearities can be calculated exactly for conduction electrons from known band structure neark = 0, and approximately for the valence electrons on the basis of simple tetrahedral bonding orbitals. Reasonable agreement with experimental data has been obtained, both for second harmonic generation and for third order susceptib... View full abstract»

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  • Correction to "Theory of an optical pulse generator"

    Publication Year: 1968, Page(s): 673
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (122 KB)

    First Page of the Article
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  • Post-deadline abstracts

    Publication Year: 1968, Page(s):674 - 678
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    Freely Available from IEEE
  • Dynamics of optical mixing in a He-Ne laser

    Publication Year: 1968, Page(s):686 - 692
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (969 KB)

    The difference frequency between two 3.39-μ signals injected into a 6328-Å and/or 1.15-μ He-Ne laser has been detected as an amplitude modulation of the 6328-Å and/or1.15-muoutput intensity. Whereas the presence of 3.39-μ radiation decreased the 6328-Å intensity, it was found to increase the 1.15-μ intensity. Experimental measurements of the bandwidth ... View full abstract»

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  • Self-Q-switching of ruby lasers at 77°K

    Publication Year: 1968, Page(s):692 - 698
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1182 KB)

    Self-Q-switching of a ruby laser rod at 77°K is reported. Detailed studies indicate that the basic mechanism involved is a saturable-absorber process achieved by shielding a particular part of the rod from the pump. An essential feature is that a non-uniform cavity photon density is required to achieve saturable-absorberQ-switching by unpumped laser atoms. Measurement of... View full abstract»

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  • Stabilization of a composite-cavity single-frequency laser

    Publication Year: 1968, Page(s):699 - 701
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (650 KB)

    A new method of stabilization for the composite-cavity-type single-frequency laser was examined experimentally. This method is insensitive to variations in oscillation power levels, and hence this type of laser can be tuned as easily as an ordinary two-mirror single-frequency laser. The relative frequency stability obtained is about5 times 10^{8}per two minutes and... View full abstract»

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  • A pulsed brewster window water vapor laser operating between 20 and 120 µ

    Publication Year: 1968, Page(s):701 - 703
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB)

    A single Brewster window pulsed water vapor laser has been constructed. Its performance is compared with that of the laser built using the same mirrors, but with both enclosed in the discharge tube. With the Brewster window laser, 13 emission lines are detected, the strongest line at 27.95 μ having a peak power of 770 watts. View full abstract»

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  • Experimental upper limit to the time of nonradiative relaxation between4T2and2Estates in ruby

    Publication Year: 1968, Page(s):703 - 704
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (353 KB)

    An upper limit of5 times 10^{-10}seconds has been determined to the time of nonradiative relaxation between4T2and2Estates of ruby. The value was inferred from slope comparison of the experimental and theoretical rise curves ofR-line fluorescence. View full abstract»

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  • [Back cover]

    Publication Year: 1968, Page(s): 0
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    Freely Available from IEEE
  • Generation and amplification of ultrashort optical pulses

    Publication Year: 1968, Page(s):606 - 609
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    During the last two years since the 1966 Iternational Quantum Electronics Conference further progress toward obtaining high-power light pulses has taken place. An effective method of ultrashort light pulse generation (mode locking) has been developed, further development of the method of coherent amplification of light pulses has been recorded, and new prospective ideas have been put forward. The ... View full abstract»

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  • Thermal self-actions of laser beams

    Publication Year: 1968, Page(s):568 - 575
    Cited by:  Papers (164)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    Theoretical and experimental studies of thermal self-defocusing and self-focusing CW laser beams in liquids and solids are given. An analytical theory of thermal self-actions, including aberration phenomena, is developed. Special attention is given to the problem of thermal self-defocusing in liquids with flows (wind or convection). The new effect of continuous light-beam deflection in absorbing m... View full abstract»

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  • Optical degradation of high- power ionized argon gas lasers

    Publication Year: 1968, Page(s):631 - 637
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    The development, over the past several years, of high-power continuous duty argon ion lasers has encountered limitations in the form of a severe optical degradation problem. An absorbing film builds gradually on the optical components, which terminates the discharge tube. This layer absorbs a small fraction of the laser power, thermally distorts the optical components, and unbalances the optical c... View full abstract»

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Aims & Scope

The IEEE Journal of Quantum Electronics is dedicated to the publication of manuscripts reporting novel experimental or theoretical results in the broad field of the science and technology of quantum electronics..

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Aaron R. Hawkins
Brigham Young University