A laser light source includes: an edge-emitting type laser diode chip that includes: a semiconductor multilayer structure including an emission layer, in which: the laser diode chip has a first end surface through which laser light generated in the emission layer is emitted, and a second end surface opposite to the first end surface, and a distance from the first end surface to the second end surface defines a cavity length; a submount having a principal surface on which the laser diode chip is fixed, and a back surface located opposite the principal surface; a pair of lens supports disposed on the principal surface of the submount and located at opposite sides with respect to the first end surface of the laser diode chip; a connecting portion connecting the pair of lens supports; a lens bonded to end surfaces of the pair of lens supports; and a semiconductor laser package.

A laser light source includes: an edge-emitting type laser diode chip that includes: a semiconductor multilayer structure including an emission layer, in which: the laser diode chip has a first end surface through which laser light generated in the emission layer is emitted, and a second end surface opposite to the first end surface, and a distance from the first end surface to the second end surface defines a cavity length; a submount having a principal surface on which the laser diode chip is fixed, and a back surface located opposite the principal surface; a pair of lens supports disposed on the principal surface of the submount and located at opposite sides with respect to the first end surface of the laser diode chip; a connecting portion connecting the pair of lens supports; a lens bonded to end surfaces of the pair of lens supports; and a semiconductor laser package.

A photonic crystal surface-emitting laser includes a light emitting module and a driving module. The light emitting module includes a photonic crystal layer, an active light emitting layer on a side of the photonic crystal layer, a first electrode on a side of the active light emitting layer facing away from the photonic crystal layer, and a second electrode partially on the side of the active light emitting layer facing away from the photonic crystal layer. The driving module makes electrical contact with surfaces of the first electrode and the second electrode facing away from the photonic crystal layer. The driving module outputs driving signals to the first electrode and the second electrode to drive the active light emitting layer to generate photons. The photons are incident into the photonic crystal layer to generate a laser light through oscillation on Bragg diffraction. An optical system is also disclosed.

A photonic crystal surface-emitting laser includes a light emitting module and a driving module. The light emitting module includes a photonic crystal layer, an active light emitting layer on a side of the photonic crystal layer, a first electrode on a side of the active light emitting layer facing away from the photonic crystal layer, and a second electrode partially on the side of the active light emitting layer facing away from the photonic crystal layer. The driving module makes electrical contact with surfaces of the first electrode and the second electrode facing away from the photonic crystal layer. The driving module outputs driving signals to the first electrode and the second electrode to drive the active light emitting layer to generate photons. The photons are incident into the photonic crystal layer to generate a laser light through oscillation on Bragg diffraction. An optical system is also disclosed.

A method of making a microlens for a VCSEL device includes forming a first lens layer over a second reflector layer. The first lens layer has a first average concentration of a first element. A first additional reflector layer is formed over the first lens layer. A second lens layer is formed over the first additional reflector layer. The second lens layer has a second average concentration of the first element greater than the first average concentration. A second additional reflector layer is formed over the second lens layer. An oxidation process is performed to oxidize peripheral portions of the first and second lens layers to form oxidized peripheral portions of the first and second lens layer. The oxidized peripheral portions of the second lens layer are wider than the oxidized peripheral portions of the first lens layer.