G. Blume, J. Pohl, D. Feise, J. Wiedmann, M. Matalla, W. John, P. Ressel, S. Kreuzmann, A. Ginolas, A. Sahm, P. Johne, M. Jendrzejewski, C. Kürbis, J. Hofmann, B. Eppich, G. Erbert, K. Paschke

Published in:

IET Optoelectron., vol. 10, no. 5, pp. 174-178 (2016).

Abstract:

A miniaturised red-emitting master-oscillator power-amplifier (MOPA) was developed. The MOPA emits a single longitudinal mode with a linewidth below 10 MHz and an optical output power of more than 300 mW at a wavelength of about 647 nm. The master-oscillator is a distributed-Bragg-reflector ridge-waveguide laser which provides the single mode with an output power of about 40 mW. The light is shaped by micro-lenses and guided through a miniaturised CdMnTe-Faraday isolator as well as a truncated tapered power amplifier; it is reshaped again afterwards to produce an almost circular, nearly diffraction-limited beam. The total length of the MOPA is below 50 mm, which fitted into a sealed butterfly package with a footprint of about 20 cm².

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