Patent ID: 9219346
Filing Date: 2015-12-22
Classification: B82Y,H01S

Abstract:
1. A laser diode assembly comprising: a mode-locked laser diode device configured to emit a diffusion light beam; a diffraction grating that configures an external resonator, and is configured to return primary or more order diffracted light to the mode-locked laser diode device, and output 0-order diffracted light outside; an imaging section provided between the mode-locked laser diode device and the diffraction grating, and configured to convert the diffusion light beam into a focused light beam that is not a parallel light beam to form an image of a light output end face of the mode-locked laser diode device on the diffraction grating; a reflecting mirror configured to reflect the 0-order diffracted light outputted from the diffraction grating; and a collimation lens positioned and configured to convert light outputted from the reflecting mirror into a parallel light beam, wherein a distance between the diffraction grating and the reflecting mirror is changed while the position relation between the diffraction grating and the reflecting mirror is kept in parallel with each other, and wherein the distance between the diffraction grating and the reflecting mirror is expressed as follows: where d