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Optics Letters

Optics Letters

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  • Vol. 14, Iss. 17 — Sep. 1, 1989
  • pp: 910–912

Phase-front measurements of an injection-locked AlGaAs laser-diode array

Donald M. Cornwell, Jr., Jonathan A. R. Rall, and James B. Abshire  »View Author Affiliations


Optics Letters, Vol. 14, Issue 17, pp. 910-912 (1989)
http://dx.doi.org/10.1364/OL.14.000910


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Abstract

The phase-front quality of the primary spatial lobe emitted from an injection-locked gain-guided AlGaAs laser-diode array is measured by using an equal-path, phase-shifting Mach–Zehnder interferometer. Root-mean-square phase errors of 0.037 ± 0.003 wave (λ/27) are measured for the single spatial lobe, which contained 240-mW cw output power in a single longitudinal mode. This phase-front quality corresponds to a Strehl ratio of S = 0.947, which results in a 0.23-dB power loss from the single lobe’s ideal diffraction-limited power. These values are comparable with those measured for single-stripe index-guided AlGaAs lasers.

© 1989 Optical Society of America

History
Original Manuscript: September 19, 1988
Manuscript Accepted: June 7, 1989
Published: September 1, 1989

Citation
Donald M. Cornwell, Jonathan A. R. Rall, and James B. Abshire, "Phase-front measurements of an injection-locked AlGaAs laser-diode array," Opt. Lett. 14, 910-912 (1989)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-14-17-910

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