An optical fiber launcher assembly can include a low precision fiber array that outputs a plurality of optical signals from a given side that are input into an opposing side. The optical fiber launcher assembly can also include a corrective optic aligned with and spaced apart from the low precision fiber array. The plurality of optical signals output from the low precision array to the corrective optic have a given trajectory and optical signals output from the corrective optic have a substantially parallel trajectory different from the given trajectory.

A fiber laser system includes a fiber laser, a laser light detecting apparatus, and a control apparatus. The fiber laser outputs a laser light, including a noise-like pulse laser light, a mode-locked pulse laser light, or a continuous-wave laser light. The laser light detecting apparatus consists of a lens and a photodiode. The photodiode absorbs the laser light outputted from the fiber laser and generates an output signal in terms of a two-photon absorption effect. The control apparatus reads the output signal of the photodiode and automatically adjusts the fiber laser, according to a preset value, to obtain the noise-like pulse laser light or the mode-locked pulse laser light.

A phase control system for controlling the relative phase () of two laser beams of a laser system, which are to be coherently combined, is disclosed that enables providing a phase-controlled sum laser beam. An optical system of the phase control system includes a beam input for receiving a measuring portion of two collinear coherent laser beams, which are superimposed to form a sum laser beam, and provides measuring beams or measuring beam regions, which are used with associated photodetectors for outputting photodetector signals. For determining the relative phase from the photodetector signals, the phase control system has an evaluation device and a delay device for being inserted into the beam path of at least one of the two laser beams. The optical system is configured such that the measuring beams or measuring beam regions are related to different phase offsets.

The aim of the invention is to machine a material by application of non-linear radiation. The aim is achieved by modifying the laser radiation emitted by a laser beam source with the aid of a polarization modulator in such a way that laser radiation focused into the material is polarized in a linear fashion, the direction of polarization varying across the cross section of the beam.

An intra-cavity frequency-tripled OPS laser has a laser-resonator including two optically nonlinear crystals arranged for type-I frequency conversion. One of the crystals generates horizontally polarized second-harmonic radiation from vertically plane-polarized fundamental-wavelength radiation circulating in the laser-resonator. A birefringent filter is located between the optically nonlinear crystals. The birefringent filter selects the fundamental-wavelength, establishes the vertical polarization-orientation, and selectively rotates the polarization-orientation of the second-harmonic radiation from horizontal to vertical. The vertically polarized fundamental and second-harmonic radiations are type-I sum-frequency mixed by the other optically nonlinear crystal.

An intra-cavity frequency-tripled OPS laser has a laser-resonator including two optically nonlinear crystals arranged for type-I frequency conversion. One of the crystals generates horizontally polarized second-harmonic radiation from vertically plane-polarized fundamental-wavelength radiation circulating in the laser-resonator. A birefringent filter is located between the optically nonlinear crystals. The birefringent filter selects the fundamental-wavelength, establishes the vertical polarization-orientation, and selectively rotates the polarization-orientation of the second-harmonic radiation from horizontal to vertical. The vertically polarized fundamental and second-harmonic radiations are type-I sum-frequency mixed by the other optically nonlinear crystal.

Composite optical beams are formed by placing the outputs of several independently controlled beam lines in a close packed array in an output aperture. Each beam line has at least its phase and polarization under automatic control. Further properties of the beam lines that can optionally be under control include time delay (for pulsed systems), intensity, and nonlinear conversion. The optical inputs to the beam lines are coherent, which can be achieved by splitting the output of a single optical source, or by phase locking two or more distinct optical sources to each other.

A laser apparatus according to the present invention may comprise: a plurality of reflection mirrors which form a resonance path so as for light to be amplified by an induced emission; a medium having a first surface which forms a vertical surface with respect to the resonance path, and a second interface which does not form a vertical surface with respect to the resonance path, and absorbs energy from a light source and amplifies and emits the light; and a saturable absorber having a second surface which forms a vertical surface with respect to the resonance path, and a second interface which does not form a vertical surface with respect to the resonance path, and generates ultrashort pulses. The laser apparatus according to the present invention has the effects of cutting a saturable absorber having a specific crystallographic axis to thereby make polarization capacity in one direction advantageous and minimize propagation loss. In addition, the laser apparatus according to the present invention has the effect of maximizing transmittivity maintenance capacity of polarization orientation in one direction by arranging a medium and a saturable medium so as to have a specific inclined plane.

A fiber amplifier system including a plurality of seed beam sources each generating a seed beam at a different wavelength and a selection switch selectively outputting the seed beams on one or more outputs. The system also includes a plurality of fiber amplifiers each receiving one of the selected seed beams from the selection switch and a plurality of wavelength division multiplexers (WDMs) where a separate WDM receives an amplified beam from a fiber amplifier, each WDM providing the amplified beam on a separate output depending on the wavelength of the selected beam. The system further includes a plurality of beam directors each being coupled to each WDM, where one of the beam directors receives all of the amplified beams on the delivery fibers from each of the WDMs depending on the selected seed beam, each beam director combining the beams using CBC or SBC into a combined output beam.

Aspects of the present disclosure describe techniques for fast stabilization of multiple controller beams with continuous integrating filter. For example, a method is described for intensity stabilization of laser beams (e.g., ion controller beams) in a trapped ion system, where the method includes applying a linear array of laser beams to respective ions in a linear array of ions in a trap, performing, in response to the laser beams being applied, parallel measurements on the ions, the parallel measurements including multiple, separate measurements on each of the ions to identify fluctuations in intensity in the respective laser beams at each ion, and adjusting the intensity of one or more of the laser beams in response to fluctuations being identified from the parallel measurements. A corresponding system for intensity stabilization of laser beams in a trapped ion system is also described.