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Quantum Electronics, IEEE Journal of

Issue 12 • Date December 1976

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Displaying Results 1 - 10 of 10
  • [Front cover and table of contents]

    Publication Year: 1976 , Page(s): 0
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    Freely Available from IEEE
  • A compact cylindrical CO2TEA laser

    Publication Year: 1976 , Page(s): 752 - 756
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (540 KB)  

    A cylindrical discharge scheme which utilizes a fine wire as the central electrode is investigated for compact CO2TEA laser applications. It is found that the strong radial dependence of electrical energy deposition into the plasma, a consequence of the large ratio of outer to inner electrode radii, produces a radial gain profile which is well localized in the center of the discharge tube. This allows for efficient matching of low-order stable optical modes to the active gain region while providing a high degree of mode selectivity in favor of these modes. Oscillation in the TEM01Laguerre-Gaussian mode has been obtained at electrical efficiencies approaching 4 percent. View full abstract»

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  • Analysis and design of semileaky-type thin-film optical waveguide isolator

    Publication Year: 1976 , Page(s): 764 - 770
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (751 KB)  

    This paper describes an optical waveguide isolator that utilizes the unidirectional guided-radiation mode coupling in a magnetooptic/anisotropic slab guide. The basic structure is the semileaky-type waveguide that has been previously used as a polarization mode filter. Specific features of the proposed device are its compact one-section form resulting from the inherent polarization-discrimination property and the relaxed dimensional tolerance due to the automatic phase-matching of coupled modes. Design data and a related discussion are given for the example of LiNbO3/YIG/GGG layered structure operating in the 1.15-μm-wavelength region. View full abstract»

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  • Arc-assisted electric discharges in high-pressure carbon monoxide gas mixtures

    Publication Year: 1976 , Page(s): 776 - 778
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (404 KB)  

    Continuous arc-assisted electric discharges have been obtained in CO-Ar and CO-N2-Ar gas mixtures at pressures of about 0.1 atm and with maximum discharge loadings of 7.9 and 23 kW/ mole/s, respectively. The discharge technique appears suitable for adaptation to CW, high-power CO lasers. View full abstract»

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  • [Back cover]

    Publication Year: 1976 , Page(s): 0
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    Freely Available from IEEE
  • Nonlinearities in the emission characteristics of stripe-geometry (AlGa)As double-heterostructure junction lasers

    Publication Year: 1976 , Page(s): 770 - 776
    Cited by:  Papers (37)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1040 KB)  

    Significant changes in the optical and electrical properties of stripe-geometry (AlGa)As double-heterostructure junction lasers have been observed to accompany a nonlinearity in the current dependence of the lasing emission. Over the nonlinear range, the optical field of the lasing emission shifts continuously with current toward one boundary of the active stripe. Simultaneously, effective gain saturation is lost and additional transverse modes are excited. The increasing gain is believed to occur primarily in spatial regions where the optical intensity is reduced as a result of the transverse motion of the field. Additional observations suggest that this transverse motion results from an interaction between the intense lasing field and the active medium. Consequently, gain depletion is discussed as a possible cause for the transverse instability. Implications of this model for a qualitative understanding of the improved output performance recently obtained from lasers with narrow stripes are also considered. View full abstract»

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  • The influence of the longitudinal plasma wave on the propagation characteristics of a metal-clad-dielectric-slab waveguide

    Publication Year: 1976 , Page(s): 745 - 748
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (424 KB)  

    The influence of the longitudinal plasma wave on propagation characteristics of a metal-clad-dielectric-slab waveguide is discussed theoretically: the influences on propagating TM waves and on a surface plasma wave, respectively, appear at a wavelength shorter and longer than the plasma wavelength of the metal cladding. View full abstract»

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  • Dispersion characteristics of diffused channel waveguides

    Publication Year: 1976 , Page(s): 748 - 752
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (432 KB)  

    A variational method is used to calculate dispersion curves for channel waveguides fabricated by masked diffusion. Composition profiles for the waveguides are obtained by numerical solution of the diffusion equation, assuming that the diffusant concentration in the unmasked region of the substrate surface is constant during the diffusion process. A linear dependence of refractive index change on diffusant concentration is assumed. The dependence of the number of guided modes on mask gap width and diffusion depth is determined as an aid to the design of modulators and switches for integrated optics. View full abstract»

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  • New infrared laser transitions in Ag II

    Publication Year: 1976 , Page(s): 778 - 779
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (184 KB)  

    We have observed seven infrared laser transitions when exciting a He discharge in a silver hollow cathode. To our knowledge, five of the seven laser transitions have not been reported previously in the literature. View full abstract»

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  • Injection locking and mode selection in TEA-CO2laser oscillators

    Publication Year: 1976 , Page(s): 756 - 764
    Cited by:  Papers (21)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1216 KB)  

    The injection of a master oscillator signal in a high-power TEA-CO2laser is analyzed and a dynamic model is formulated to represent the interaction. Based on the competition between the injected signal and the spontaneous emission, the model describes the transient evolution of the different field amplitudes and phases together with their effect on the inversion. A study over a wide range of injection levels and detuning frequencies clearly indicates three distinct regions of operation: a spontaneous oscillation zone, a mode-selection zone, and a frequency-locking zone. The main predictions of the model are compared with the results obtained with an experimental injection apparatus that assures adequate control of the TEA laser cavity length and that provides means for measuring the frequency of the output pulse. While the first two zones are directly observed, it is experimentally established that, at injection levels up to 5 W/cm2, the frequency-locking zone does not exceed, as predicted, the 3-MHz resolution limit of the apparatus. 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