摘要:
A laser device (100), configured for generating laser pulses, has a laser resonator (10) with a gain disk medium (11) and a Kerr medium (12). The laser resonator (10) includes a first mode shaping section (13) which is adapted for shaping a circulating electric field coupled into the gain disk medium (11), and a second mode shaping section (14), which is adapted for shaping the circulating electric field coupled into the Kerr medium (12) independently of the electric field shaping in the first mode shaping section (13). Furthermore, a method of generating laser pulses (1) using a laser resonator (10) with a gain disk medium (11) and a Kerr medium (12) is described.
摘要:
In einer Spiegelanordnung zur Führung eines Laserstrahls in einem Lasersystem mit mindestens einem ersten Endspiegel (1) und einem zweiten Endspiegel (2) definieren diese Endspiegel (1,2) einen Resonator mit optischen Resonatorachse (OA), wobei der Laserstrahl als Eingangslaserstrahl (ES) in den Resonator geführt und nach mehrfacher Reflexion an jeweils dem ersten und dem zweiten Endspiegel (1,2) als Ausgangslaserstrahl (AS) wieder aus dem Resonator geführt wird. Dabei legt die Abfolge der Reflexionen an dem ersten und dem zweiten Endspiegel (1,2) eine gegenüber der Resonatorachse (OA) als Drehachse definierte Drehrichtung zwischen dem ersten und zweiten Endspiegel im Resonator fest, wodurch ein erster Strahlgang definiert ist und der Laserstrahl mit einer gegenüber der Resonatorachse (OA) als Drehachse definierten Drehrichtung zwischen dem ersten und zweiten Endspiegel im Resonator umläuft. Der Resonator ist so ausgebildet, dass die Drehrichtung in einem Umkehrpunkt umgekehrt wird und der Laserstrahl im Resonator zumindest teilweise mit zum ersten Strahlgang gegenläufiger Drehrichtung durchläuft, wodurch ein zweiter Strahlgang definiert ist.
摘要:
Solid-state laser (100) with tube-shaped active medium (108) having an amplifier module (120) configured to provide an optical gain for a source light, the amplifier module comprising: a tube (108) having an interior surface and an exterior surface, the tube including a laser gain material (108a) ; a first substrate (107a) adjacent the interior surface of the tube (108) , the first substrate including a first plurality of microchannels (132) ; a second substrate (107b) adjacent the exterior surface of the tube (108) , the second substrate includign a second plurality of microchannels (132) ; and a plurality of diode bars (101) arranged exterior to the second substrate (107b) and configured to provide optical pump radiation to the laser gain material (108a) . The tube (108) may include two identically loaded laser gain elements (108a) separated by a 90 degree toric quartz rotator (118) and optically transparent endcaps (106) . The laser may comprise axicon, waxicon or reflaxicon optics (103) to convert the annular beam to a compacted cylindrical beam. Plural amplifier modules (220) may be concatenated. Advantageously, thermal lensing effects, birefringence, bifocussing, and alignment problems associated with typical tube SSLs are eliminated or reduced while providing high beam quality and high average power levels.
摘要:
A synchronously-pumped optical parametric oscillator (OPO 10) driven by the second harmonic output of a Kerr-Iens-mode-locked Ti :sapphire laser (12) generates femtosecond pulses with wide tunability in the visible and ultraviolet spectrum. The OPO uses bismuth triborate, BiB3O6 (or BIBO) or a substituted form thereof, in collinear critical phase-matching as the nonlinear gain crystal (24). Using simple crystal rotation at room temperature, a continuous tuning range from 480nm to 710nm is achieved with a single BIBO crystal (24) and a single set of mirrors (26, 28, 30) for the OPO cavity. The OPO (10) generates up to 27OmW of average power across the available tuning range and can deliver femtosecond pulses at a repetition rate of 76MHz. Frequency doubling of the visible signal pulses from the OPO (10) is also achieved in the crystal of β-BaB2O4, external and internal to the OPO resonator (10), providing femtosecond pulses with wide tunability in the 235nm to 355nm in the ultraviolet at average powers of up to 100mW.
摘要:
The invention relates to a highly repetitive laser system operating according to the reproducible amplifier principle. Said system comprises at least one amplified laser medium (6), a laser resonator provided with at least one resonator mirror (5) and at least one modulator (3) and a pump source, in particular, a laser diode source, which is used to pump the laser medium (6). The highly repetitive laser system is compact by virtue of the fact that a pulse extensor (7), having a highly dispersive effect as a result of the structure or material thereof, is integrated into the laser resonator.
摘要:
A diode end-pumped solid state laser is provided which produces improved power output, long term stability and improved conversion efficiency from the pumping power, high as well as low power operation while maintaining certain desirable common characteristics such as TEM00 operation, circular outputs, readily aligned systems and compatibility with long lifetime for all components. The invention intracavity conversion to second, third and higher harmonics in several different spectral regimes. The invention also addresses the aspects of design flexibility, seeking in certain embodiments to provide a single platform for providing several harmonic beams.
摘要:
A laser system, such as a master oscillator/power amplifier system, comprises a gain medium and a stimulated Brillouin scattering SBS mirror system. The SBS mirror system includes an in situ filtered SBS medium that comprises a compound having a small negative non-linear index of refraction, such as a perfluoro compound. An SBS relay telescope having a telescope focal point includes a baffle at the telescope focal point which blocks off angle beams. A beam splitter is placed between the SBS mirror system and the SBS relay telescope, directing a fraction of the beam to an alternate beam path for an alignment fiducial. The SBS mirror system has a collimated SBS cell and a focused SBS cell. An adjustable attenuator is placed between the collimated SBS cell and the focused SBS cell, by which pulse width of the reflected beam can be adjusted.
摘要:
A simultaneously super pulsed Q-switched CO2 laser system for material processing is disclosed. The system comprises sealed-off folded waveguides with folder mirrors that are thin film coated to select the output wavelength of the laser. The system also comprises a plurality of reflective devices defining a cavity; a gain medium positioned within the cavity for generating a laser beam; a cavity loss modulator for modulating the laser beam, generating thereby one or more laser pulses; a pulsed signal generation system connected to the cavity loss modulator for delivering pulsed signals to the cavity loss modulator thereby controlling the state of optical loss within the cavity; a control unit connected to the pulsed signal generation system for controlling the pulsed signal generation system; and a pulse clipping circuit receptive of a portion of the laser beam and connected to the pulsed signal generation system for truncating a part of the laser pulses.