Near-infrared pulses are emitted from a pulsed light source. A scanner directs the near-infrared pulses as scanned light. An optical element directs the scanned light into the eye. The scanned light is scanned in two dimensions to form an image on the eye. Photon-pairs of the near-infrared pulses deliver a photon energy that is perceived as visible light.

A method is disclosed for controlling a pulse repetition rate of pulsed laser beam 1 created by pulsed laser oscillator 100, includes generating beam 1 by oscillator 100, splitting beam 1 into first pulsed split beam 1a and second pulsed split beam 1b, time-delaying split beam 1a relative to split beam 1b by optical delay device 220, generating timing baseband signal Sc including a timing jitter of the pulse repetition rate based on split beam 1a and second split beam 1b by timing detector device 230, generating feedback signal Sf based on timing baseband signal Sc, and applying feedback signal Sf on oscillator 100 and controlling the pulse repetition rate of beam 1 based on the feedback signal Sf. Furthermore, repetition rate control apparatus 200 for controlling a pulse repetition rate of pulsed laser oscillator 100 and pulsed laser oscillator 100, comprising repetition rate control apparatus 200 are described.

A passively, Q-switched laser operating at an eye safe wavelength of between 1.2 and 1.4 microns is described. The laser may operate at a lasing wavelength of 1.34 microns and use a gain element of Nd:YVO.sub.4 and a saturable absorber element of V:YAG. The position of the resonator axial mode spectrum relative to a gain peak of the gain element is controlled to yield desired characteristics in the laser output.

An amplified laser device is provided with one or more Micro-Electro-Mechanical System (MEMS) Micro-Mirror Arrays (MMAs) having tip, tilt and piston capability positioned on either side of the optical amplifier to correct the profile of the beam to improve the gain performance of the optical amplifier or to compensate for atmospheric distortion while steering the amplified beam over a FOR. The MEMS MMAs may be positioned in front of, behind or on both sides of the amplifier. The MEMS MMAs can be configured to optimize the combined amplifier performance, static and time varying, and compensation for atmospheric distortion together or separately.

An amplified laser device is provided with one or more Micro-Electro-Mechanical System (MEMS) Micro-Mirror Arrays (MMAs) having tip, tilt and piston capability positioned on either side of the optical amplifier to correct the profile of the beam to improve the gain performance of the optical amplifier or to compensate for atmospheric distortion while steering the amplified beam over a FOR. The MEMS MMAs may be positioned in front of, behind or on both sides of the amplifier. The MEMS MMAs can be configured to optimize the combined amplifier performance, static and time varying, and compensation for atmospheric distortion together or separately.

A wavelength control method of a laser apparatus includes sequentially obtaining target wavelength data of a pulse laser beam, sequentially saving the target wavelength data, sequentially measuring a wavelength of the pulse laser beam to obtain a measured wavelength, calculating a wavelength deviation using the measured wavelength and the target wavelength data at a time before a time when the measured wavelength is obtained, and feedback-controlling the wavelength of the pulse laser beam using the wavelength deviation.

A laser apparatus includes a first optical element, a second optical element, a first actuator configured to change a first wavelength component included in a pulse laser beam by changing a posture of the first optical element, a second actuator configured to change a second wavelength component included in the pulse laser beam by changing a posture of the second optical element, a first encoder configured to measure a position of the first actuator, a second encoder configured to measure a position of the second actuator, and a processor. The processor reads a first relation and a second relation and performs control of the first actuator based on the first relation and the position of the first actuator measured by the first encoder and control of the second actuator based on the second relation and the position of the second actuator measured by the second encoder.

A laser apparatus includes a first optical element, a second optical element, a first actuator configured to change a first wavelength component included in a pulse laser beam by changing a posture of the first optical element, a second actuator configured to change a second wavelength component included in the pulse laser beam by changing a posture of the second optical element, a first encoder configured to measure a position of the first actuator, a second encoder configured to measure a position of the second actuator, and a processor. The processor reads a first relation and a second relation and performs control of the first actuator based on the first relation and the position of the first actuator measured by the first encoder and control of the second actuator based on the second relation and the position of the second actuator measured by the second encoder.

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques.

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques.