25 October 2005 5.3 W cw output power from a master oscillator power amplifier at 1083nm
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A master-oscillator power-amplifier system at λ=1083 nm with 5.3 Watt output power and a narrow spectral linewidth was realised. The master oscillator was a distributed Bragg reflector (DBR) laser with a 3-μm wide ridge waveguide (RW) and a total length of 2 mm. The power amplifiers were a 4 mm long antireflection coated tapered laser diodes with 500 μm or 1000 μm long straight RW sections. At a temperature of 40oC and an injection current of 160 mA, the DBR laser had a wavelength of 1083 nm. The emitted light of the DBR laser was focused into the tapered amplifier with a seed power of up to 36 mW. At 10oC and at a current through the tapered amplifier of 8.6 A, a maximum output power of 5.3 W was measured. Over the full operating range single longitudinal mode operation at a wavelength of λ=1083 nm was maintained with a side mode suppression ratio better than 35 dB. The vertical far field angle was below 22o (FWHM).
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Bernd Sumpf, Bernd Sumpf, Sven Schwertfeger, Sven Schwertfeger, Jörg Wiedmann, Jörg Wiedmann, Andreas Klehr, Andreas Klehr, Frank Dittmar, Frank Dittmar, Götz Erbert, Götz Erbert, Günther Tränkle, Günther Tränkle, } "5.3 W cw output power from a master oscillator power amplifier at 1083nm", Proc. SPIE 6013, Optoelectronic Devices: Physics, Fabrication, and Application II, 60130C (25 October 2005); doi: 10.1117/12.630640; https://doi.org/10.1117/12.630640

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