A second-order diffraction grating placed below the active region of a phase-locked resonant antiguided array selects the in-phase array mode in addition to its role as a single-longitudinal-mode selector. This type of array-mode discrimination relies on the fact that the resonant in-phase array mode has significantly better field overlap with the grating region than nonresonant array modes. Furthermore, it eliminates the need for a conventional array-mode discriminator: interelement loss; which can cause self-pulsations. Diffraction-limited beam and single-frequency operation is obtained to at least 0.45 W peak pulsed power from 20 element, InGaAs/InGaP/GaAs structures of 120-μm-wide aperture. Distributed-feedback operation is confirmed over the 20–40 °C temperature range. The results are in good agreement with theory.
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3 August 1998
Research Article|
August 03 1998
0.45 W diffraction-limited beam and single-frequency operation from antiguided phase-locked laser array with distributed feedback grating
M. P. Nesnidal;
M. P. Nesnidal
Reed Center for Photonics, Electrical and Computer Engineering Department, University of Wisconsin-Madison, Madison, Wisconsin 53706
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T. Earles;
T. Earles
Reed Center for Photonics, Electrical and Computer Engineering Department, University of Wisconsin-Madison, Madison, Wisconsin 53706
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L. J. Mawst;
L. J. Mawst
Reed Center for Photonics, Electrical and Computer Engineering Department, University of Wisconsin-Madison, Madison, Wisconsin 53706
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D. Botez;
D. Botez
Reed Center for Photonics, Electrical and Computer Engineering Department, University of Wisconsin-Madison, Madison, Wisconsin 53706
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J. Buus
J. Buus
Gayton Photonics, Ltd., 6 Baker Street, Gayton, Northants NN7 3EZ, England
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Appl. Phys. Lett. 73, 587–589 (1998)
Article history
Received:
March 26 1998
Accepted:
May 30 1998
Citation
M. P. Nesnidal, T. Earles, L. J. Mawst, D. Botez, J. Buus; 0.45 W diffraction-limited beam and single-frequency operation from antiguided phase-locked laser array with distributed feedback grating. Appl. Phys. Lett. 3 August 1998; 73 (5): 587–589. https://doi.org/10.1063/1.121864
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