METHOD OF CONTROLLING DIODE-LASER WAVELENGTH IN A DIODE-LASER PUMPED SOLID-STATE LASER

摘要

A method for controlling the emitting-wavelength of a diode-laser or diode-laser array in a diode-laser pumped solid-state laser (DPSS-laser) is disclosed. In the light-control mode, diode-laser temperature is periodically varied by a small temperature increment above and below a set temperature, and the diode-laser current required to provide constant DPSS-laser output-power is monitored. A difference in diode-laser current at temperatures higher and lower than the set temperature indicates that the emitting-wavelength of the diode-laser has changed from an optimum value. Changing the diode-laser set temperature to a value at which there is no difference in current at the higher and lower temperatures restores the emitting-wavelength of the diode-laser to the optimum value. In the current-control mode, DPSS-laser output-power is monitored at the higher and lower temperatures. Controlling diode-laser set temperature such that there is no difference in output-power at the higher and lower temperatures maintains the emitting-wavelength of the diode-laser at the optimum value.