an optoelectronic laser module , in particular for dense wavelength division multiplex systems , is described . the laser module has a laser diode with an active region , an optical resonator containing a highly silvered reflecting surface and a bragg interference grating which provides frequency - selective feedback , and a housing which accommodates the laser diode and has a holder for coupling an optical conductor . the bragg interference grating is configured as a fiber bragg grating in an optical conductor and the optical conductor is connected to the housing via the holder . as a result , it is possible with the use of standard components to provide a laser having an external resonator whose emission wavelength can be set in a simple way by suitable selection of the fiber bragg grating .