METHOD FOR STABILIZING A DIODE LASER

摘要

The invention relates to a method for stabilizing a diode laser with a semiconductor laser diode and an external resonator (ECDL), wherein the external resonator is comprised of at least one angle-dispersive, frequency-selective element and wherein the frequency of the diode laser is essentially determined by the length of the external resonator and by the position of the angle-dispersive, frequency-selective element, and wherein these two frequency-selective elements or one element thereof can be detuned by way of a correction means (10) for harmonization to each other, which is characterized in that the portion of the light reflected from the external resonator with the angle-dispersive, frequency-selective element back to the semiconductor laser diode and not optically coupled into the semiconductor laser diode (designated as “non-optically coupled light”) or part thereof, is measured and that from the relevant measuring values, after comparison with a reference value, a fault signal is generated which as control variable activates the correction means for synchronization of the frequency-selective elements. Furthermore, the invention relates to device for implementing the method.

主权项

1. A method for stabilizing a diode laser (1) with a semiconductor laser diode (2) and an external resonator (ECDL), wherein the external resonator comprises at least one angle-dispersive, frequency-selective element (4) and wherein the frequency of the diode laser (1) is essentially determined by the length of the external resonator and by the position of the angle-dispersive, frequency-selective element (4), and wherein these two frequency-selective elements or one element thereof can be detuned by way of a correction means (10) for harmonization to each other, wherein a portion of the light reflected from the external resonator with the angle-dispersive, frequency-selective element (4) back to the semiconductor laser diode (2) and not optically coupled into the semiconductor laser diode (2), or part thereof, is measured and wherein from the relevant measuring values, after comparison with a reference value, a fault signal is generated which as a control variable activates the correction means (10) for synchronization of the frequency-selective elements.