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  • Articles: DFG German National Licenses  (6)
  • 1990-1994  (6)
  • 1992  (6)
Source
  • Articles: DFG German National Licenses  (6)
Material
Years
  • 1990-1994  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    High-power coherent surface-emitting antiguided diode laser arrays (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 627-629 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-power coherent GaAs/GaAlAs surface-emitting antiguided laser arrays with dry etched micromirrors have been demonstrated for the first time. Both the deflecting 45° and 90° micromirrors were fabricated by ion beam etching. Twice diffraction-limited far-field beam profiles were obtained to pulsed output powers as high as 550 mW, with 220 mW in the central lobe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107828
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Antiresonant reflecting optical waveguide-type, single-mode diode lasers (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 503-505 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Antiresonant reflecting optical waveguide (ARROW)-type diode lasers have been demonstrated for the first time. The ARROW structure is made in the lateral direction (i.e., the plane of the junction) by two-step metalorganic chemical vapor deposition. Stable, diffraction-limited beam operation is achieved to 0.6 W peak pulsed power and 20× threshold. The power contained within the diffraction-limited beam pattern is 420 mW with 60% of the energy residing in the central, diffraction-limited lobe. Modal calculations for ARROW lasers confirm very strong intermodal discrimination. Theoretical calculations and preliminary experimental data show that up to 90% of the energy can be obtained in the central lobe (475 mW diffraction-limited power).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108475
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Γ effect: Key intermodal-discrimination mechanism in arrays of antiguided diode lasers (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 3096-3098 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By using results of the Bloch-function method applied to infinite-extent antiguided arrays, a closed-form expression has been derived, for the first time, for Γ, the two-dimensional array-mode confinement factor. When array modal behavior is analyzed, as the interelement-region width varies, domains of in-phase (i.e., single-lobe) array operation are found to occur periodically around the resonance points of in-phase modes. It is made clear why coupled-mode theory failed to predict how to obtain single-lobe phase-locked operation. Results of an exact analysis of a 20-element array are discussed, with the main conclusion being that the Γ effect, while being the key mechanism for selecting single-lobe array operation, does not insure purely diffraction-limited beams to high powers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106763
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Simple description of laterally resonant, distributed-feedback-like modes of arrays of antiguides (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 1049-1051 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Bloch-function method is used to provide a simple, yet accurate treatment of the leaky modes of infinite-extent antiguided arrays. Laterally resonant modes of infinite arrays are described for the first time. Bloch-function solutions for infinite arrays are used to explain key characteristics of the modes of finite-extent antiguided arrays. It is found that the resonant modes of antiguided arrays satisfy the second-order lateral Bragg condition, and consequently are analogous to the modes of second-order distributed-feedback (DFB) lasers. In effect, the resonant-optical-waveguide (ROW) array is a second-order lateral DFB structure with the radiative component along the longitudinal device axis, and zero stopband.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106440
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Resonant self-aligned-stripe antiguided diode laser array (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 668-670 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Resonant-optical-waveguide (ROW) arrays with a self-aligned-stripe (SAS) geometry have been realized for the first time. Resonance is achieved by holding the array element/interelement widths constant and varying the aluminum composition of the passive guide layer. External differential quantum efficiencies as high as 47% have been achieved from longitudinally uniform 20-element 1000 μm-long devices. Diffraction-limited-beam operation is obtained up to 13×threshold, and 2.1 W output power level from devices with Talbot-type spatial filters. The front-facet emitted coherent uniphase power is 1.6 W, with 1.15 W in the central lobe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106586
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Injection locking of antiguided resonant optical waveguide arrays (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 26-28 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on the first demonstration of injection locking of strong index-guided large-aperture devices [20-element resonant-optical-waveguide (ROW) antiguided arrays] under pulsed operation. Full locking was achieved far above the threshold level (2.6×Ith) by injecting light from a master oscillator in a direction normal to the diode facet and only in one element of the 20-element ROW array. Single-frequency tuning is achieved over a ≥30 A(ring) spectral range for emission in the 8500 A(ring) region, while the beam pattern remains spatially stable and diffraction limited. For devices operating nearly resonant (i.e., beam width 2 to 3× the diffraction limit) injection locking accomplishes both single-frequency as well as diffraction-limited-beam operation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107355
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    Paper (German National Licenses)
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