摘要:
Die vorliegende Erfindung betrifft eine Laservorrichtung und ein Verfahren zum Ansteuern einer Laservorrichtung. Die Laservorrichtung umfasst einen Laserresonator (1), welcher ein Lasermedium (3) aufweist. Zudem umfasst die Laservorrichtung einen ersten Modulator (4), welcher in dem Laserresonator (1) angeordnet ist, und welcher ausgebildet ist, einen ersten Ausgangsstrahl (6) aus dem Laserresonator (1) auszukoppeln. Des Weiteren umfasst die Laservorrichtung einen zweiten Modulator (5), welcher in dem Laserresonator (1) angeordnet ist, und welcher ausgebildet ist, einen zweiten Ausgangsstrahl (7) aus dem Laserresonator (1) auszukoppeln.
摘要:
Systems and methods are described for producing an amplitude-modulated laser pulse train. The laser pulse train can be used to cause fluorescence in materials at which the pulse trains are directed. The parameters of the laser pulse train are selected to increase fluorescence relative to a constant-amplitude laser pulse train. The amplitude-modulated laser pulse trains produced using the teachings of this invention can be used to enable detection of specific molecules in applications such as gene or protein sequencing.
摘要:
A laser device (100), being configured for generating laser pulses by Kerr lens based mode locking, comprises a laser resonator (10) with a plurality of resonator mirrors (11.1, 11.2, 11.3) spanning a resonator beam path (12), a solid state gain medium (20) being arranged in the laser resonator (10), a Kerr medium device (30) being arranged with a distance from the gain medium (20) in the laser resonator (10), wherein the Kerr medium device (30) includes at least one Kerr medium being arranged in a focal range of the resonator beam path and being configured for forming the laser pulses by the nonlinear Kerr effect, and a loss-modulation device (31, 32) having a modulator medium, which is capable of modulating a power loss of the laser pulses generated in the laser resonator (10), wherein the Kerr medium device (30) includes the modulator medium of the loss- modulation device (31, 32) as the at least one Kerr medium having an optical non-linearity being adapted for both of creating the Kerr lens based mode-locking in the laser resonator and modulating the power loss in the laser resonator. Furthermore, a method of generating laser pulses by Kerr lens based mode locking is described, wherein a loss-modulation device (31, 32) is used for both of introducing a Kerr effect in the laser resonator (10) and modulating the power loss.
摘要:
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.
摘要:
Die Erfindung betrifft ein Verfahren zum Erzeugen von Laserpulsen (PL) durch Cavity Dumping mittels eines Laser-Resonators (1), der Laser-Resonator (1) umfassend: einen elektro - optischen Modulator (5) zur Erzeugung einer variablen Phasenverzögerung (P1) in dem Laser-Resonator (1), eine Verzögerungseinheit, insbesondere eine Verzögerungsplatte (8), zur Erzeugung einer festen Phasenverzögerung (P2) in dem Laser-Resonator (1) sowie einen Polarisator (10) zur Auskopplung von Laserpulsen (PL) aus dem Laser-Resonator (1). Bei dem Verfahren erzeugt in einem ersten Betriebszustand zum Aufbau eines Laserpulses (PL) der Modulator (5) eine der festen Phasenverzögerung (P1) der Verzögerungseinheit entgegen gerichtete Phasenverzögerung (P2), um einen Auskoppelgrad (A) am Polarisator (10) gegenüber einem zweiten Betriebszustand zur Auskopplung eines Laserpulses (PL) zu verringern. Die feste Phasenverzögerung (P2) der Verzögerungseinheit weist bei einem Resonator-Umlauf bevorzugt einen Betrag von weniger als lambda/2, insbesondere von lambda/3 oder weniger auf.
摘要:
An active gain region sandwiched between a 100 % reflective bottom Bragg mirror and an intermediate partially reflecting Bragg mirror is formed on a lower surface of a supporting substrate, to thereby provide the first ('active') resonator cavity of a high power coupled cavity surface emitting laser device. The reflectivity of the intermediate mirror is kept low enough so that laser oscillatin within the active gain region will not occur. The substrate is entirely outside the first active resonator cavity to a level sufficient to cause lasing. The substrate is entirely outside the active cavity but is contained within a second ('passive') resonator cavity defined by the intermediate mirror and a partially reflecting output mirror, where it is subjected to only a fraction of the light intensity that is circulating in the gain region.
摘要:
A system and method for laser light amplification provides amplification of a laser light emitted from a laser light source as low-amplification seed laser light signal. The low-amplification seed laser light signal is transmitted to an amplification component. The amplification component amplifies the low-amplification seed laser light signal by stimulating emissions of the population inversion provided by a pumping diode to generate an amplified laser light signal. The system and method further directs the amplified laser light signal to an output destination. The result of the present invention is a system and method of operation providing higher pulse rates, improved pointing stability, and optionally variable pulse rates for a variety of uses, including for non-destructive laser ultrasonic testing of materials.
摘要:
An optical transmission line for Raman-amplifying an optical signal by supplying pumping light. A range where the Raman gain coefficient takes on a maximum is a predetermined distance away from the end where the pumping light is supplied in the direction of the propagation of the pumping light. The power of the optical signal does not increase to the extent that the optical Kerr effect becomes remarkable at any point of the optical transmission line, does not decrease to the extent that the SN ratio remarkably lowers, and is ensured to have a large value at the end of the transmission line. A method for manufacturing the optical transmission line and an optical transmission system comprising the optical transmission line are also disclosed.
摘要:
Systems and techniques of incorporating an optical resonator (121) in an optical part of a feedback loop (120) in opto-electronic oscillators (100). This optical resonator (121) provides a sufficiently long energy storage time and hence to produce an oscillation of a narrow linewidth and low phase noise. Certain mode matching conditions are required. For example, the mode spacing of the optical resonator (121) is equal to one mode spacing, or a multiplicity of the mode spacing, of an opto-electronic feedback loop that receives a modulated optical signal and to produce an electrical oscillating signal.
摘要:
Verfahren zum Erzeugen elektromagnetischer Nutzstrahlung (2) mit den Schritten: a) Erzeugen und Abstrahlen einer elektromagnetischen Saatlichtstrahlung (4) mit einer Saatlichtfrequenz, b) Einkoppeln der Saatlichtstrahlung in einen externen optischen Resonator (5) mit einer Resonanzfrequenz, die zumindest zunächst im Wesentlichen gleich der Saatlichtfrequenz ist, so dass in dem Resonator eine elektromagnetische Resonatorstrahlung mit der Resonanzfrequenz oszilliert, c) Pumpen eines im Resonator angeordneten Verstärkungsmediums, d) Verstärken der in dem Resonator oszillierenden Resonatorstrahlung in dem Verstärkungsmedium, wobei die Verstärkung kleiner ist als eine durch den Resonator und das Verstärkungsmedium vorgegebene für eine Lasertätigkeit des Resonators erforderliche Schwellenverstärkung, e) Ändern der Resonanzfrequenz des Resonators, so dass die Resonanzfrequenz der im Resonator oszillierenden Resonatorstrahlung geändert wird, wobei die Saatlichtfrequenz der Änderung der Resonanzfrequenz nicht folgt, und f) Auskoppeln der Resonatorstrahlung aus dem Resonator als Nutzstrahlung mit einer von der Saatlichtfrequenz verschiedenen Nutzfrequenz.