Variable numerical-aperture temporal-coherence measurement of resonant-cavity LEDs

Variable Numerical-Aperture Temporal-Coherence Measurement of Resonant-Cavity LEDs

The first interferometric measurements of temporalcoherence length variation with numerical aperture (NA) are described for 650 nm, resonant-cavity light-emitting diodes (LEDs) agreeing with spectrally derived results. The interferometrically measured coherence length (22 m to 32 m) reduced by 37% for a 0.42 increase in NA. For a larger range of NA (0–1), this would give coherence lengths (10 m...

Resonant Cavity Quantum Dot LEDs

Quantum dot LEDs (QD-LEDs), which capitalize on the excellent color saturation and high photoluminescence efficiencies offered by quantum dots, promise to be part of future generations of display technologies [1]. The goal of our project is to integrate the already developed technology of the QD-LED into a resonant cavity (RC) and thereby achieve enhanced, directed electroluminescence (EL) that...

Measurement of Leds

Correction of coherence gate curvature in high numerical aperture optical coherence imaging.

We present a method for correcting coherence gate curvature caused by scanning-induced path length variations in spectral-domain high-NA optical coherence imaging systems. These variations cause curvature artifacts in optical coherence tomography and effectively restrict the field of view in optical coherence microscopy (OCM). Here we show that the coherence gate curvature can be measured and c...

Resonant Cavity Enhanced

Resonant Cavity Enhanced (RCE) photodiodes are promising candidates for applications in optical communications and interconnects where ultrafast high-eeciency detection is desirable. We have designed and fabricated RCE Schottky photodiodes in the (Al,In)GaAs material system for 900nm wavelength. The observed temporal response with 10 ps pulse width was limited by the measurement setup and a con...