DBR tapered diode laser with 12.7 W output power and nearly diffraction-limited, narrowband emission at 1030 nm
A. Müller, J. Fricke, F. Bugge, O. Brox, G. Erbert
Published in:
Appl. Phys. B, published online (2016).
Abstract:
A 1030 nm distributed Bragg reflector (DBR) tapered diode laser with nearly diffraction-limited emission is presented. The laser provides an optical output power of 12.7 W with an electro-optical efficiency >40 %. At 10.5 W of optical output power, a central lobe power content of 8.1 W and a nearly diffraction-limited beam propagation ratio of M2 = 1.1 (1/e2) are obtained. The corresponding brightness is 700 MW cm-2 sr-1. Compared to previous approaches, intrinsic wavelength stabilization is obtained by a third-order DBR grating manufactured using more reproducible electron-beam lithography. A narrowband emission is measured over the whole power range with a spectral bandwidth of about 17 pm at 12.5 W. Based on the measured electro-optical, spectral and spatial properties, the laser is suitable for applications requiring narrowband, high-power emission with high spatial quality.
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
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