670 nm tapered lasers and amplifier with output powers P greater than or equal to 1 W and nearly diffraction limited beam quality

B. Sumpf; G. Erbert; J. Fricke; P. Froese; R. Häring; W. G. Kaenders; A. Klehr; F. Lison; P. Ressel; H. Wenzel; M. Weyers; M. Zorn; G. Tränkle

doi:10.1117/12.697935

27 February 2007 670 nm tapered lasers and amplifier with output powers P ⩾ 1 W and nearly diffraction limited beam quality

B. Sumpf, G. Erbert, J. Fricke, P. Froese, R. Häring, W. G. Kaenders, A. Klehr, F. Lison, P. Ressel, H. Wenzel, M. Weyers, M. Zorn, G. Tränkle

Author Affiliations +

Proceedings Volume 6485, Novel In-Plane Semiconductor Lasers VI; 648517 (2007) https://doi.org/10.1117/12.697935
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

High-brightness tapered lasers and amplifiers at 670 nm with output powers up to 1 W and nearly diffraction limited beam quality were realised. The devices consist of a 750 &mgr;m long straight section and a 1250 &mgr;m long tapered section. Devices with a taper angle of 2°, 3° and 4° were manufactured. The material quality was studied in a long-term test for ridge-waveguide lasers. Devices with 7.5 &mgr;m ridge width show reliable operation at 100 mW output power over more than 10000 h. At a temperature of 15°C a tapered lasers with an angle of 4° reached an output power of 1 W at a current of 2.1 A. The highest conversion efficiency for this device was 24%, the peak wavelength of the emission was 668 nm and the spectral width was smaller than 0.2 nm. The beam propagation factor was M² = 1.7 (1/e²) and M² = 3.0 (second moments). At 500 mW output power, master-oscillator power-amplifier (MOPA) devices showed also a nearly diffraction limited beam quality with M² < 1.5 and reliable operation with degradation rates as low as 7x10^-6 h^-1 over 1200 h. The spectral line-width in this arrangement is determined by the master oscillator and is suitable for high-resolution spectroscopy.

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B. Sumpf, G. Erbert, J. Fricke, P. Froese, R. Häring, W. G. Kaenders, A. Klehr, F. Lison, P. Ressel, H. Wenzel, M. Weyers, M. Zorn, and G. Tränkle "670 nm tapered lasers and amplifier with output powers P ⩾ 1 W and nearly diffraction limited beam quality", Proc. SPIE 6485, Novel In-Plane Semiconductor Lasers VI, 648517 (27 February 2007); https://doi.org/10.1117/12.697935

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