Patent ID: 8971364
Filing Date: 2015-03-03
Classification: H01S

Abstract:
1. A method of driving an analog-modulated diode-laser, comprising the steps of: providing an analog modulation signal corresponding to a desired modulation profile for the diode-laser, the magnitude of the modulation signal varying in a range between predetermined first and second extreme values with one of the minimum and maximum values representing zero output of the diode laser; generating an analog modulated drive-current, the drive-current being the sum of a DC component and modulated component, the modulated component related to the modulation signal; driving the diode-laser with the drive-current to provide laser-output; monitoring the magnitude of the modulation signal a component of which is used to generate the modulated drive current and comparing the monitored modulation signal with a predetermined set value within the range between the extreme values; and if the magnitude of the monitored modulation signal falls between the set value and the said one of the extreme values of the modulation signal representing a desired zero output of the diode laser, switching off the drive current.