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IEEE Journal of Quantum Electronics

Issue 4 • Date April 1978

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Displaying Results 1 - 18 of 18
  • [Front cover and table of contents]

    Publication Year: 1978, Page(s): 0
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    Freely Available from IEEE
  • A xenon ion pumped blue dye laser

    Publication Year: 1978, Page(s):220 - 221
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (242 KB)

    A pulsed xenon ion laser with an output power of 5 kW at 364.5 nm has been used as a pump source for several blue dyes. Broad-band conversion efficiencies exceed 20 percent. The use of a birefringent filter provides tunable output in the blue region of the spectrum with a bandwidth of 0.08 nm and a pulsewidth of 120 ns. View full abstract»

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  • Analytical approximation of the radiation confinement factor for the TE0mode of a double heterojunction laser

    Publication Year: 1978, Page(s):230 - 232
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (266 KB)

    An analytical approximation is found for \Gamma _{0} , the TE0radiation confinement factor in symmetric heterostructures, by using a combination of its asymptotes in the limits of very thin active layers and thick active layers, respectively. The exact expression for ... View full abstract»

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  • A laser augmented reaction: SF6+ SiH4→S*2+ SiF4+ HF + H2· retention of isotopic selectivity during detonation

    Publication Year: 1978, Page(s):233 - 237
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (610 KB)

    A single unfocused pulse of a free running CO2laser, area ∼ 8 cm2, initiates an explosive reaction between SF6and SiH4. This occurs at a minimum energy of 4 J [full width at half maximum (FWHM) ... View full abstract»

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  • A sealed high-repetition-rate TEA CO2laser

    Publication Year: 1978, Page(s):263 - 274
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1162 KB)

    A compact atmospheric pressure CO2laser utilizing a double-discharge technique has been constructed and operated at repetition rates to 100 pulses/s. With the addition of small amounts of hydrogen and carbon monoxide to give a gas mixture of He:N2: CO2:CO:H2= 69.3:11:15:4:0.7, sealed operational lifetimes exceeding ... View full abstract»

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  • Characteristics of a hollow-core distributed feedback CO2laser

    Publication Year: 1978, Page(s):275 - 283
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (775 KB)

    Using perturbation theory and a plane wave analysis, the scattering amplitudes and coupling coefficients for a planar, hollow-core, double grating distributed feedback (DFB) waveguide laser are derived. Waveguide reflectivity has been compared for a single and double grating waveguide configuration. For a waveguide dimension of 100 μm over a 10 cm length, reflectivity is enhanced from 75 perc... View full abstract»

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  • A purely chemical HCl laser employing transverse flow

    Publication Year: 1978, Page(s):293 - 302
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1033 KB)

    A purely chemical continuous wave HCl laser has been developed. The purely chemical production of nonequilibrium concentrations of Cl atoms is achieved by a branched chain reaction between NO and ClO2. Three modes of accomplishing the prepumping chemistry are discussed and their effects on HCl laser performance are evaluated. A transverse flow laser was operated having a maximum HCl mul... View full abstract»

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  • [Back cover]

    Publication Year: 1978, Page(s): 0
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    Freely Available from IEEE
  • Far infrared laser emission from15NH3optically pumped by a CW sequence band CO2laser

    Publication Year: 1978, Page(s):222 - 223
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    Two new coincidences between theP(31) andP(35) CO210.6 μm sequence band emission lines and the15NH3absorption lines have been found to produce far infrared (FIR) emission lines atlambda = 111.9and 218 μm. In addition, the known coincidence between the regularR(42) 10.6 μm band CO2emission line an... View full abstract»

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  • Improved coupled mode analysis of corrugated waveguides and lasers

    Publication Year: 1978, Page(s):245 - 258
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    Corrugated waveguides and lasers in resonant and non-resonant situations are analyzed by an improved coupled mode theory based on a set of the coupled mode equations for guided modes and radiation continuum. The distributed feedback (DFB) coefficient and the radiation loss coefficient are given in closed forms. The formulation can be applicable to arbitrarily shaped gratings and multilayer wavegui... View full abstract»

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  • Extended use of the sealed HBr chemical laser by "Cl2activation"

    Publication Year: 1978, Page(s):227 - 230
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A new passivation technique, which we call "Cl2activation," has been developed for the pulsed HBr chemical laser. Hundreds of HBr laser shots have been observed from the sealed H2+ Br2gas mixture as the result of the Cl2activation. Under normal conditions, HBr molecules accumulate in the reagent gas mixture after laser oscillation, and the accumulated HB... View full abstract»

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  • Temporal compression of light

    Publication Year: 1978, Page(s):310 - 315
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The 5890 Å output from a CW dye laser was converted into a train of 0.5 ns pulses by frequency modulation and passage through a near-resonant atomic vapor delay line of Na. The theory of the process is discussed in both the time and frequency domains. Using a modulation index of 120 at a frequency of 17.8 MHz, we obtained values for the temporal compression ratio and intensity enhancement of ... View full abstract»

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  • GaAs/GaAlAs diode lasers with angled pumping stripes

    Publication Year: 1978, Page(s):223 - 227
    Cited by:  Papers (5)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Operation of DH GaAs/GaAlAs stripe contact lasers with stripes oriented nonorthogonally to the cleaved end facets of the laser is described. Such lasers, with misalignment angles of \sim2\deg , do not exhibit "kinking" behavior to power levels greater than 90 mW/facet, and do not exhibit relaxation oscillations under pulsed operation. Data showing the depende... View full abstract»

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  • Gain of high-pressure CO2lasers

    Publication Year: 1978, Page(s):217 - 220
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Previous theories of high-pressure CO2gain spectra have been modified to include gain Contributions from the newly discovered 00°2 and 00°3 sequence bands. It is shown that the inclusion of these bands has important consequences for TE CO2lasers. At a pressure of 14 atm, the sequence bands typically cause a 40 percent increase in calculated gain at all frequencies. ... View full abstract»

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  • Modal analysis of strip-loaded diffused optical waveguides by a variational method

    Publication Year: 1978, Page(s):259 - 263
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The propagating modes supported by strip-loaded three-dimensional diffused optical waveguides are analyzed in detail theoretically by using a variational method. Some typical numerical examples of the propagation constants and the field distributions are illustrated. The dependence of propagation characteristics on the geometrical parameters of the loading dielectric strip is discussed. View full abstract»

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  • Laser initiated explosions and chemiluminescence

    Publication Year: 1978, Page(s):237 - 245
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Explosions can be induced in mixtures of SF6with appropriate fuels, by a single pulse of a free running CO2laser \approx 1.5 \mu s [full width at half maximum (FWHM)]. A typical threshold for initiation of reaction was somewhat above 4 J for a 1:1 mixture of SF6and SiH4, at a total pressure of 10 torr, with the unfo... View full abstract»

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  • Pulse propagation in the amplifier of a high-power iodine laser

    Publication Year: 1978, Page(s):302 - 309
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Pulse propagations in an amplifier in the case of the photodissociation iodine laser are investigated with the use of semiclassical treatments, especially when the input pulse fed into the amplifier has a width comparable to or shorter than the transverse relaxation time of the amplifier medium. In our semiclassical equations for pulse propagation in an iodine amplifier, the populations of all hyp... View full abstract»

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  • Spectroscopy and lasing of a high Nd concentration Al-phosphate glass

    Publication Year: 1978, Page(s):283 - 293
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    An Al-phosphate glass containing Nd3+in concentrations ranging from 3 \times 10^{20} to 2.7 \times 10^{21} ions/cm3has been prepared and investigated spectroscopically. Different ways of measuring the4F3/24I9/2emission cross sections yield values be... 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