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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CB_P_28

Coexistence of Multiple Stable Continuous-Wave States in Micro-Integrated External-Cavity Diode Lasers

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Abstract

We report the results of numerical and experimental investigations of the dynamics of an external cavity diode laser (ECDL) device [1] composed of a semiconductor laser, a several millimetre long external volume holographic Bragg grating, and a glass lens closely located at the inner facet of the active section (see Fig. 1). The Bragg grating provides optical feedback and can stabilize the emission wavelength as required by many applications. For example, the compact, narrow linewidth ECDL is ideally suited for quantum optical experiments in space. However, frequently ECDLs have more than one stable stationary or non-stationary attractor, see Fig. 2 and Refs. [2,3]. In general, each of these stable attractors can be observed by an appropriate tuning of laser parameters in simulations or increase and a consequent decrease of the device heating or injected current in experiments. Fig. 3 shows how up and down sweep of the injected current allows finding of two coexisting stable continuous wave (cw) states with different wavelengths and emission intensities.

© 2015 IEEE

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