Single-frequency external-cavity tapered diode laser in a double-ended cavity configuration

摘要

We achieved stable single-frequency oscillation in an external-cavity tapered diode laser. The external cavity was constructed from a diffraction grating and an output mirror, which were plated, respectively, in the narrow-area side and the broad-area side of the tapered-stripe chip, with collimator lenses on both sides. The best position for the output mirror was a focal point of the output beam along the axis parallel to the diode junction plane, while the beam along the axis perpendicular to the junction plane was collimated by the collimator lens.