Title :
Integrated magnetooptic Bragg cell modulator in yttrium iron garnet-gadolinium gallium garnet taper waveguide and applications
Author :
Wang, C.L. ; Tsai, Chen S.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
An integrated magnetooptic (MO) device which consists of an ion-milled collimation-focusing lens pair and a guided-wave MO Bragg cell modulator in a yttrium iron garnet-gadolinium gallium garnet (YIG-GGG) taper waveguide substrate with dimensions of 6.0×16.0 mm 2 has been realized for the first time. Performance characteristics of the waveguide lenses including the focal spot size, sidelobe level and throughput, and that of the integrated MO Bragg cell modulator using the magnetostatic forward volume wave (MSFVW) at X-band carrier frequency including the bandwidth, diffraction efficiency, dynamic range, and frequency resolution have been measured at the optical wavelength of 1.303 μm. Scanning of the focused diffracted light beam by varying the carrier frequency of the MSFVW and RF spectral analysis by simultaneous application of multiple microwave frequencies have been demonstrated
Keywords :
gadolinium compounds; garnets; integrated optics; lenses; magnetic thin films; magneto-optical modulation; magnetostatic wave devices; optical collimators; optical switches; optical waveguides; spectral analysis; yttrium compounds; 1.303 mum; 16.0 mm; 6.0 mm; GdGG; GdGa5O12; RF spectral analysis; X-band carrier frequency; YFe5O12-GdGa5O12; YIG-GdGG; YIG-GdGG taper waveguide; bandwidth; carrier frequency; diffraction efficiency; dynamic range; focal spot size; focused diffracted light beam; frequency resolution; guided-wave MO Bragg cell modulator; integrated magnetooptic Bragg cell modulator; ion-milled collimation-focusing lens pair; magnetostatic forward volume wave; multiple microwave frequencies; optical wavelength; performance characteristics; sidelobe level; throughput; waveguide lenses; Collimators; Frequency; Gallium compounds; Iron; Lenses; Magnetic modulators; Magnetooptic devices; Optical diffraction; Optical waveguides; Yttrium;
Journal_Title :
Lightwave Technology, Journal of
