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.

Report Date:

1994-10-01

Pagination or Media Count:

42.0

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 3.2cm 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