Tunable DBR laser and a method of operating a tunable DBR laser

摘要

A tunable DBR laser including: an amplifier section, a part-reflecting optical output, a connection section connected to the amplifier section, and at least two wavelength-selective reflectors optically coupled to the amplifier section via the connection section. The connection section includes at least one MMI coupler and several waveguides, so that different optical paths lead from the amplifier section to the wavelength-selective reflectors and each of the different optical paths leads through the at least one MMI coupler and through one of the waveguides. The wavelength-selective reflectors differ from one another by having different reflection spectra and each of the wavelength-selective reflectors is connected to one of several outputs of the at least one MMI coupler. By activating a phase shifter, arranged in a course of at least one of the waveguides, the DBR laser can be switched between different resonators.

主权项

1. A tunable DBR laser comprising:
an amplifier section containing an active material; a part-reflecting optical output; a connection section, the connection section being connected to the amplifier section at an end of the amplifier section which lies opposite the part-reflecting output; and at least two wavelength-selective reflectors, the wavelength-selective reflectors being optically coupled to the amplifier section by way of the connection section,
wherein the connection section comprises at least one MMI coupler and several waveguides running next to one another, so that different optical paths lead from the amplifier section to the wavelength-selective reflectors, each of the different optical paths leading through the at least one MMI coupler and through one of the waveguides to one of the wavelength-selective reflectors, wherein the wavelength-selective reflectors differ from one another by having different reflection spectra and wherein each of the wavelength-selective reflectors is connected to one of several outputs of the at least one MMI coupler, wherein a phase shifter is arranged in a course of at least one of the waveguides, so that the DBR laser by way of activating the at least one phase shifter can be switched over between different resonators, each of the resonators being delimited by one of the wavelength-selective reflectors.