First Annual Technical Report on ONR Grant No.: N00014-90-J-4039 (University ofCalifornia, Irvine)

摘要

Two major achievements have been made during the first program year (July 1, 1990to June 30, 1991): First, a compact magnetooptic forward volume wave-based guided-wave magnetooptic (MO) Bragg cell module has been realized by utilizing a small permanent magnet together with a current-carrying tuning coil. Performance characteristics comparable to those obtained using the bulk electromagnet have been obtained. Second, magnetostatic backward volume wave-based guided-wave MO Bragg cells have been realized, for the first time, and used to perform wide-angle light beam scanning by tuning the carrier frequency from UHF-to X-band. Although Magneto-optics in waveguide structures was among the areas actively pursued during the early phase of Guided-Wave Optics research, research activity in this area was greatly reduced between the mid 70's and early 80's. However, a revival of interest in this area has taken place recently. One subject of this renewed interest concerns collinear and noncollinear (transverse Bragg) magnetooptic (MO) interactions between guided-optical waves (GOW) and magnetostatic waves (MSW) in Yttrium Iron Garnet-Gadolinium Gallium Garnet (YIG-GGG) waveguides.