Eye-safe laser-based lighting

A laser-based light source, comprising:

• a laser device configured to generate laser light of a predetermined laser wavelength and emit the laser light as a laser beam;
• a phosphor light-conversion device configured to convert at least part of the laser light into phosphor converted light;
• a laser-output sensor configured to determine a laser-output signal being correlated with an output of the laser light emitted by the laser device;
• a phosphor converted-light sensor configured to determine a converted-light signal being correlated with an output of the phosphor converted light emitted by the phosphor light-conversion device;
• and
• a controller configured to receive the laser-output signal and the phosphor converted-light signal and determine a safe-to-operate parameter of the laser device based on a ratio of the laser-output signal and the phosphor converted-light signal or based on phase delay between the laser-output signal and the phosphor converted-light signal, and control operation of the laser-based light source based on a comparison between the safe-to-operate parameter and at least one predefined eye-safety threshold or legislation.