Accession Number : ADA289260

Title :   On-Axis Polarization Coupling in y-Cut Titanium In-Diffused Lithium Niobate Slab Waveguides.

Descriptive Note : Technical rept.,

Corporate Author : COLORADO UNIV AT BOULDER DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Kwiatkowski, Stephen L. ; Mickelson, Alan R. ; Hjelme, Dag R.

PDF Url : ADA289260

Report Date : OCT 1994

Pagination or Media Count : 42

Abstract : We report on polarization coupling from x-propagating TE-polarized waveguide modes to TM-polarized radiation modes in y-cut titanium in-diffused lithium niobate slab waveguides. The polarization coupling is linear with respect to the TE-polarized input power and depends on the titanium diffusion time. Furthermore, the polarization coupling was not affected by white light flooding the waveguide. The maximum conversion from a TE-polarized waveguide mode to a TM-polarized radiation mode is 3.2%/cm using a conservative estimate for the power initially in the TE waveguide mode. We observe no turn-on delay greater than 1 s between the excitation of the TE waveguide mode and the observation of the TM radiation. In addition, intentional amplitude modulations of the TE-polarized waveguide mode were registered as equivalent amplitude modulations by the TM-polarized radiation modes. We did not observe polarization coupling from x-propagating TM-polarized waveguide modes to TE-polarized radiation modes.

Descriptors :   *COUPLING(INTERACTION), *POLARIZATION, *WAVEGUIDES, *TITANIUM, *DIFFUSION, *LITHIUM NIOBATES, CONVERSION, PROPAGATION, RADIATION, AXES, DELAY, MODULATION, AMPLITUDE, FLOODING, WHITE LIGHT.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE