Keith J Becken

Reverse-proton-exchanged waveguide frequency doublers for green light generation

We describe reverse-proton exchanged (RPE) waveguides in MgO-doped lithium niobate capable of stable secondharmonic generation (SHG) of over 100 mW of CW green light with conversion efficiency exceeding 200%/Wcm2. Substantially higher green power would require careful thermal management to limit the phase mismatch due to heating produced by optical absorption. RPE waveguides show ability to support high-power generation of green light superior to anneal-proton exchanged (APE) waveguides containing a higher-index layer. We also demonstrate devices with multipeak spectral response for speckle-reduced green laser by using phase-modulated, quasi-periodic ferroelectric domain structure.

P-197L: Late-News Poster: Impacts of Glass Substrate and Frit Properties on Sealing for OLED Lighting

Glass frit seal with localized heating using near infrared laser can provide long-term hermeticity and good mechanical strength for OLEDs. In this report, some general characteristics of the frit sealing process are first discussed. Then the impacts offrit and glass substrate properties, such as CTE and strain points on the seal, will be presented. It is found that CTE of the frit may not match with that of glass substrates used for lighting application. The optimal CTE values of glass substrate for OLED lighting and frit are presented.