Observation and analysis of phase-locking in parabolic bow-tie laser arrays

Reference:

Causa, F. and Masanotti, D., 2006. Observation and analysis of phase-locking in parabolic bow-tie laser arrays. IEEE Journal of Quantum Electronics, 42 (9-10), pp. 1016-1022.

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Official URL:

http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=3

Abstract

This paper presents experimental and theoretical results to show that in-phase coherent coupling occurs in high-power arrays of parabolic bow-tie lasers. Such devices require simple and inexpensive device fabrication, thus providing a cost-effective highpower laser for high-brightness operation at 980 nm. The maximum brightness achieved was 318MW cm-2sr-1 at 20 times the threshold with far-field full-width at half-maximum less than 1.5 times the diffraction limit, measured without the use of external lenses under low-duty cycle (0.1%) pulsed operation. Results obtained from double-slit interference experiments show a clear distinction between phase-coherent arrays and corresponding arrays of independent emitters.

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