The invention relates to a device (10) for amplifying a laser pulse which comprises a divider section (14) for dividing the laser pulse into multiple sub pulses (43) and for introducing a time delay between the sub pulses (43), a compressor section (15) for compressing the temporally divided sub pulses (43) and a combiner section (17) for combining the compressed sub pulses (44) to one compressed laser pulse (45).

Apparatus for and methods of combining multiple, i.e., two or more laser beams to reduce even to the point of elimination a transverse gap between the two or more beams caused, for example, by a space between a coating on a surface of the mirror and the edge of the mirror, or by optic geometry, is avoided.

An apparatus (10) for increasing a pulse length of a pulsed radiation beam, the apparatus comprising: a beam splitter (16) configured to split an input radiation beam (18) into a first beam (24) and a second beam (22); an optical arrangement (12, 14), wherein the beam splitter and the optical arrangement are configured such that at least a portion of the first beam is recombined with the second beam into a modified beam after an optical delay of the first beam caused by the optical arrangement; and at least one optical element (30) in an optical path of the first beam, the at least one optical element configured such that the phase of different parts of a wavefront of the first beam is varied to reduce coherence between the first beam and the second beam.

A light source including: a pulse generator for providing a first sequence of light pulses, the first sequence of light pulses including a first number of light pulses within a predetermined time period, a manipulator configured to generate a second sequence of light pulses from the first sequence of light pulses, the second sequence of light pulses having a second number of light pulses within the predetermined time period, the second number being different from the first number, and a nonlinear optical element arranged to receive the second sequence of light pulses.

A method and a system for measuring carrier-to-envelope phase fluctuations (CEP) fluctuations of a laser field, the method comprising focusing laser pulses in a solid-state material for high harmonic generation, collecting a resulting high harmonic spectrum, and inferring a relative phase of the driving field from the high harmonic spectrum. The system comprises a source of CEP stable mid-infrared laser pulses; a CEP variation unit; a solid state medium; a detector; and first focusing optics focusing pulses generated by the source into the solid state medium and second focusing optics collecting resulting harmonics generated in the solid state medium into the detector.

A handheld LIBS device and method includes a laser assembly producing two pulsed single spatial mode output beams and a focusing optic which combines the two pulsed single spatial mode output beams at a focal point at a sample. The laser assembly includes a laser assembly housing with an output coupler window for the two pulsed single spatial mode output beams, a gain medium in the laser assembly housing between the output coupler window and an adjustable prism mount in the laser assembly housing holding a prism configured to establish two light paths through the gain medium, a source in the laser assembly housing providing pump energy to the gain medium, and a Q-switch positioned between the prism and the gain medium.

This invention provides a pulse shaping technique that can yield a pulsed laser having a smaller energy fluctuation than that of a conventional pulse shaping technique using one or two non-linear optical crystals. A pulse shaping device includes: a non-linear optical crystal group including at least three non-linear optical crystals arranged side by side on an optical path of an input pulsed laser.

A supporting member supports a peeled end portion formed at an end portion in longitudinal direction representing first direction of an optical fiber, the optical fiber including: a core wire including a core and a cladding; and a jacket configured to enclose the core wire, the jacket being removed at the peeled end portion to expose the core wire. The supporting member includes: a first member; a second member fixed to the first member; a housing portion provided between the first member and the second member, the housing portion extending along the peeled end portion and being configured to house the peeled end portion; and a processed member housed in the housing portion and provided around the peeled end portion, the processed member being configured to cause transmission or scattering of light leaking from the peeled end portion.

A laser apparatus according to an aspect of the present disclosure includes a laser oscillator configured to emit a pulse laser beam, and a first optical pulse stretcher, a second optical pulse stretcher, and a third optical pulse stretcher that are disposed on an optical path of the pulse laser beam. When L1 represents an optical path length of a delay optical path of the first optical pulse stretcher, L2 represents an optical path length of a delay optical path of the second optical pulse stretcher, L3 represents an optical path length of a delay optical path of the third optical pulse stretcher, and n represents an integer equal to or larger than two, L2 is an integral multiple of L1 by an integer equal to or larger than two and L3 satisfies the following condition: (n−0.75)×L1≤L3≤(n−0.25)×L1.

Methods, systems, and devices are described for generating an optical signal. An example device may comprise a chip and a waveguide disposed on the chip and comprising silicon nitride. The waveguide may be configured to generate, based on nonlinear effects applied to a pump signal from a pump laser, an optical signal having a broader spectrum than the pump signal. The waveguide may have a width and a height such that the optical signal has near zero group-velocity-dispersion.