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IEEE Journal of Quantum Electronics

Issue 3 • Date March 1974

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Displaying Results 1 - 21 of 21
  • [Front cover and table of contents]

    Publication Year: 1974, Page(s): 0
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    Freely Available from IEEE
  • Correction

    Publication Year: 1974, Page(s): 393
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (89 KB)

    First Page of the Article
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  • Q switching and mode locking the Nd3+-glass laser with the nickel dithienes

    Publication Year: 1974, Page(s):394 - 395
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    Measurement of the relaxation time for transient bleaching of solutions of bis-(4-dimethylaminodithiobenzil)-nickel (BDN) explains observed Q -switch and mode-locking behavior. A pronounced solvent effect permits varying relaxation time by a factor of 5 down to times short enough to be considered for mode locking in special circumstances. View full abstract»

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  • [Back cover]

    Publication Year: 1974, Page(s): 0
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    Freely Available from IEEE
  • Intense electron-beam initiation of a high-energy hydrogen fluoride (HF) laser

    Publication Year: 1974, Page(s):333 - 337
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A superradiant hydrogen fluoride (HF) laser is described in which an intense electron beam, propagating in a SF6and C2H6mixture, is used to initiate chemical reactions that produce vibrationally excited HF molecules. The variation of laser energy as a function of SF6pressure for fixed composition and as a function of composition at a fixed SF6... View full abstract»

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  • Laser-induced electric breakdown in solids

    Publication Year: 1974, Page(s):375 - 386
    Cited by:  Papers (332)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1544 KB)

    A review is given of recent experimental results on laser-induced electric breakdown in transparent optical solid materials. A fundamental breakdown threshold exists characteristic for each material. The threshold is determined by the same physical process as dc breakdown, namely, avalanche ionization. The dependence of the threshold on laser pulse duration and frequency is consistent with this pr... View full abstract»

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  • Propagation characteristics of multimode fibers with graded core index

    Publication Year: 1974, Page(s):362 - 371
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Bending loss and impulse response of multimode fibers with graded-index core have been studied. A multimode fiber which has a large index difference is profitable because of low loss in bends. Impulse response of the fiber in which all of the possible modes are excited with the same intensity depends remarkably on the fourth-order term of the index profile. A small value of mode delay of 0.15 ns/k... View full abstract»

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  • Ultraviolet photoionization in TEA lasers

    Publication Year: 1974, Page(s):311 - 319
    Cited by:  Papers (47)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Measurements of UV photoionization parameters for TEA CO2gas lasers are presented. Electron density and ionization decay times are given as a function of pressure for several gases and gas mixtures. Penetration depth of ionizing radiation in the gases is determined. The effect of selected additives on photoionization is demonstrated. The results show that a significant enhancement in el... View full abstract»

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  • High S/N-ratio electrooptic prism-array light deflectors

    Publication Year: 1974, Page(s):358 - 362
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    A method to construct electrooptic prism-array deflectors which is, in the author's view, the most promising device for application in digital systems is analyzed. Experiments agreed well with the analysis. An experimental deflector with nine elements showed 180 resolved individual spots when driven with a maximum voltage of ± 580 V. It is shown that this type of deflector is capable of resol... View full abstract»

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  • Electron-beam exposure of optical gratings

    Publication Year: 1974, Page(s):391 - 393
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Because of electron scattering, optimum exposure conditions for optical gratings written with a scanning electron microscope depend on the grating period. Experimentally determined exposure conditions are given for gratings of periods down to 230 nm deposited on both conducting and nonconducting substrates. Optimum exposures are shown to be in good agreement with theoretical predictions, but expos... View full abstract»

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  • The efficiency of thin-film optical-waveguide modulators using electrooptic films or substrates

    Publication Year: 1974, Page(s):306 - 311
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    This paper describes a new method for characterizing thin-film modulators which utilize TE \buildrel\rightarrow\over\leftarrow TM wave conversion. The conversion is described in terms of a coupled wave model. The coupling constant k describes the strength of the coupling between the TE and TM waves. It is expressed in the... View full abstract»

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  • Theory of optical gain and threshold properties of semiconductor lasers

    Publication Year: 1974, Page(s):297 - 305
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    The theory of optical gain in highly doped semiconductors employed for semiconductor lasers is developed based on the Green function approach. With the help of the analytical expression obtained for optical gain, the threshold properties of semiconductor lasers and their dependence on concentration of doping impurities and on temperature are studied. Results of numerical calculations of threshold ... View full abstract»

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  • Laser Q switching by a PLZT shutter

    Publication Year: 1974, Page(s):356 - 358
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The application of a polycrystalline ferroelectric ceramic Pb1-xLax(ZryTiz)1-(x/4)O3(called PLZT) electrooptic shutter is described for controlling the giant pulse emission of a ruby laser. The PLZT material had ... View full abstract»

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  • Improved mode properties of unstable resonators with tapered reflectivity mirrors and shaped apertures

    Publication Year: 1974, Page(s):346 - 355
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    The use of tapered reflectivity mirrors and shaped apertures in unstable resonators is shown to be an effective method for improving the mode properties. Mode intensity and phase profiles are smoothed and the mode discrimination ratio is increased. Results are presented illustrating the importance of diffracted waves from sharp mirror edges in determining these mode properties. A simple expression... View full abstract»

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  • Infrared laser lines in neutral atomic phosphorus

    Publication Year: 1974, Page(s):394 - 395
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    Laser oscillation in the near infrared has been found in pulsed discharges in phosphorus vapor. The laser transitions are assigned to the neutral phosphorus atom. View full abstract»

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  • Reflection and scattering by a single groove in integrated optics

    Publication Year: 1974, Page(s):326 - 332
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The reflection and scattering properties of guided optical waves at a single groove discontinuity are studied in this paper. The groove is on the surface of an optical thin-film waveguide commonly used in integrated optics. Both the fundamental TE0and TM0modes are considered. The problem is treated by a boundary perturbation technique. The power reflection coefficient, the ra... View full abstract»

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  • Nonlinear-optical device characteristics of gaseous saturable absorbers

    Publication Year: 1974, Page(s):338 - 346
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    Measurements have been made of the third-order nonlinear-optical susceptibilities of gaseous infrared saturable absorbers. These coefficients are relevant to mode locking of infrared lasers such as CO2. The measurements are in good agreement with a theory based on a four-level model of the absorber. Earlier mode-locking observations are interpreted in light of the new data. The value of... View full abstract»

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  • Gain of high-pressure CO2lasers

    Publication Year: 1974, Page(s):372 - 375
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Gain formulas are shown for the 10.4- and 9.4-μm CO2bands for the high-pressure broadening case to point out a new regime of operation for this laser. Computer-simulated results of this gain are presented as a function of wavenumber, with density equivalent pressure and population inversion ratio as parameters. The results show gain curves that suggest continuously tunable lasers o... View full abstract»

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  • High peak power and short pulses from a ring laser mode locked by internal modulation

    Publication Year: 1974, Page(s):387 - 389
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Mode-locked unidirectional traveling-wave oscillation of a He-Ne ring laser is theoretically shown to be possible by internal loss or phase modulation. It should have a higher peak power and shorter pulses than the conventional laser systems. View full abstract»

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  • The observation of diffusion as an effective vibrational relaxation rate in CO2

    Publication Year: 1974, Page(s):320 - 325
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A differential absorption signal of 10.6-μ radiation by a CO2cell in the alternating presence and absence of a partially saturating beam on a different transition is observed as a function of increasing pressure of helium. The linear increase with pressure at low pressures is explained as a result of diffusion acting as a strong effective vibration relaxation rate. The behavior as ... View full abstract»

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  • HCl chemical lasing with HI and chloro compounds

    Publication Year: 1974, Page(s):389 - 390
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    HCL chemical laser action has been obtained from chloro compounds when HI was used as the source of H atoms. Laser action was produced on several \upsilon = 3-2, 2-1 , and 1-0 HCl transitions when initiated by transverse pulsed discharges in HI-He mixtures containing such chloro compounds as CCl4, CHCl3, and several Freons. Both HCl and ... 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