Title

Coherence of Photonic Crystal Vertical Cavity Surface Emitting Laser Arrays

Contributing USMA Research Unit(s)

Electrical Engineering and Computer Science

Publication Date

1-2007

Publication Title

IEEE Journal of Quantum Electronics ( Volume: 43, Issue: 1, January 2007)

Document Type

Article

Abstract

We measure and compare the coherence properties of 2 times 1 arrays of photonic crystal vertical-cavity surface-emitting lasers. Antenna array theory applied to the measured far field intensity patterns is used to determine the phase of the complex degree of coherence, which is found to vary with current injection. The amplitude of the complex degree of coherence is determined by calculating the visibility from the far field patterns and making near field measurements of the relative intensities between lasing defects. We find that the amplitude and phase of the complex degree of coherence are correlated, such that coherence is maximized near in-phase and out-of-phase coupling conditions, and controllable by independent current injection to each array element

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