Coherence of Photonic Crystal Vertical-Cavity Surface-Emitting Laser Arrays
Institute of Electrical and Electronics Engineers (IEEE)
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...
Vertical cavity surface emitting lasers, Photonic crystals, Surface emitting lasers, Optical arrays, Phased arrays, Laser theory, Semiconductor laser arrays, Antenna measurements, Antenna theory, Antenna arrays
A. C. Lehman, J. J. Raftery, P. S. Carney and K. D. Choquette, "Coherence of Photonic Crystal Vertical-Cavity Surface-Emitting Laser Arrays," in IEEE Journal of Quantum Electronics, vol. 43, no. 1, pp. 25-30, Jan. 2007, doi: 10.1109/JQE.2006.884586.