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A novel window structure referred to as window grown on facets (WGF) is applied to a 10%-95% coated narrow-stripe laser with a wavelength of 780 nm. An aspect ratio of 2 in the beam divergence without a decrease in the differential quantum efficiency is obtained by optimizing the narrow-stripe structure. Highly reliable operation under 70 mW CW at 60°C is attained beyond 4000 hours.

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High-power single-stripe AlGaAs lasers with a new type of window structure named “window grown on facets (WGF)” are described here for the first time. In the lasers, window layers have been grown on cleaved (110) facets, independent of the internal laser structures. A stable fundamental transverse mode has been obtained up to more than 200 mW of output power in the wavelength range of 830 nm. No obvious degradation has been observed beyond 2000 hours under 100 mW and 150 mW CW operation at 50°C.

The lateral force mode of an atomic force microscope is a contact-based measurement where the cantilever moves laterally in order to contribute to the lateral component of the tip-surface interaction. An accurate quantitative measure is difficult to achieve and is subject to the calibration of a model of the machine such that the output signal is related to the contact forces. Currently available models and calibration methods do not consider the existence of crosstalk. The influence of the latter on the measurement is not clearly identified and raises the question of the result's accuracy. In this paper a definition of the crosstalk is given and the diversity of the crosstalk briefly presented. A first-order, two-dimensional model of the system that includes the force-based crosstalk is presented. The model is used to simulate a calibration method known as the 'wedge method'. A parametric study is carried out to evaluate the calibration errors that can be made by the 'wedge method'. Results show that force-based crosstalk can have a noticeable influence on the calibration as well as on the estimated friction coefficient.