Abstract:
A Raman laser device including: a Raman lasing medium adapted to undergo Raman lasing; and at least one pumping beam, for pumping a Stokes seed beam by stimulated Raman scattering whilst it traverses the Raman lasing medium.
Abstract:
A method includes accumulating (604, 704) optical pump power in a first laser gain medium (218) during a first period of time (TS), where the first laser gain medium is optically located within a resonator (302, 304, 402-406). The method also includes providing (608, 706) at least some of the accumulated optical pump power as a first laser output with a feedback-controlled waveform from the first laser gain medium to a second laser gain medium (204) during a second period of time (TP), where the second period of time is substantially shorter than the first period of time. The method further includes generating (610, 708) a second laser output having a burst (102) of laser pulses (104) using the second laser gain medium as a power amplifier (204). The first and second laser outputs have higher power levels during the second period of time compared to a power level of the optical pump power during the first period of time.
Abstract:
An optical crystal can be mounted to a mounting block configured to receive the crystal. A base portion on the mounting block utilizes two walls forming a corner and a single biasing spring clip to secure the crystal. The spring clip applies forces in two different directions substantially orthogonal to the two walls. The spring clip is based off a symmetrical geometry which applies nearly the same force application in both directions. The spring also features rounded bend regions that contact the crystal in such a way as to reduce the presence of point loads or stress risers. The length of contact along the crystal is maximized, allowing for proper force distribution and a sufficient surface are contact for static holding capabilities.
Abstract:
This relatively inexpensive, compact laser light source device improves energy utilization efficiency when amplifying pulse light with a solid state amplifier and removes heat-generating loss of the amplifier, and comprises: a seed light source (10); a fiber amplifier that amplifies the pulse light output from the seed light source using gain switching; a solid-state amplifier that further amplifies that output; a non-linear optical element that performs wavelength conversion on the pulse light outputted from the solid-state amplifier; a light-switching element (40) which reduces ASE noise and which is positioned between the fiber amplifier (30) and the solid-state amplifier (50); and a control unit (100). The control unit controls the light-switching element so as to allow the propagation of light during the output of pulse light from the seed light source and hinder the propagation of light while pulse light is not being output, and cyclically or intermittently controls the excitation light source of the fiber amplifier and/or the solid-state amplifier in such a manner that the fiber amplifier and/or the solid-state amplifier inverts the pulse light output from the seed light source before input.
Abstract:
A laser apparatus may include a master oscillator, an optical unit provided in a beam path of a laser beam from the master oscillator, a beam adjusting unit provided upstream from the optical unit in a beam path of the laser beam and configured for adjusting at least one of a beam path and a wavefront of the laser beam, a first detection unit provided between the beam adjusting unit and the optical unit in a beam path of the laser beam and configured for detecting the laser beam, a second detection unit provided downstream from the optical unit in a beam path of the laser beam and configured for detecting the laser beam, and a controller configured for controlling the beam adjusting unit based on outputs from the first and second detection units.
Abstract:
A source of femtosecond laser pulses (50) comprising a 980nm picosecond seed pulse source (12), a Ytterbium (Yb) doped fibre amplifier (14) operating in the three-level regime, a passive air-clad fibre (52) and a pulse compressor (16). The seed pulses are spectrally broadened due to self phase modulation (SPM) in the air-clad Yb doped fibre (18) and further broadened due to SPM in the passive core of the passive air-clad fibre (52), to produce sufficient spectral broadening to allow the pulses to be compressed in the dispersion compensator (16) into femtosecond pulses.The Yb doped fibre may have a phosphosilicate host composition in order to mitigate photodarkening.