Abstract:
Aspects of the present disclosure describe systems, methods, and structures for providing bidirectional C-band and L-band transmission employing optical circulators which advantageously eliminates C\L WDM couplers while still blocking any backward amplified spontaneous emissions from optical amplifiers.
Abstract:
In an example, a tandem pumped fiber amplifier may include a seed laser, one or more diode pumps, and a plural core fiber including a first core and a second core, the second core surrounding the first core. The plural core fiber may include a first section to operate as an oscillator and a second different section to operate as a power amplifier. The one or more diode pumps may be optically coupled to the first section of the plural core fiber, and the seed laser may be optically coupled to the first core.
Abstract:
Die Erfindung betrifft eine Treiberlaseranordnung (12) für eine EUV-Strahlungserzeugungsvorrichtung (1), umfassend: eine Strahlquelle (2) zur Erzeugung von Laserstrahlung (7), die in einer ersten Richtung (R1) propagiert, eine Verstärkeranordnung (3) mit mindestens einem optischen Verstärker (4a-e) zur Verstärkung der in der ersten Richtung (R1) propagierenden Laserstrahlung (7), sowie mindestens einen optischen Isolator (13). Der optische Isolator (13) weist eine mit einem Gas (20) gefüllte Kammer (14) auf, die von der in der ersten Richtung (R1) propagierenden Laserstrahlung (7) durchlaufen wird. Der optische Isolator (13) weist auch eine Plasmaerzeugungseinrichtung (16, 17) auf, die zur gepulsten Zündung eines Plasmas (21) in dem Gas (20) der Kammer (14) ausgebildet ist, um einen Durchtritt von Laserstrahlung (7a), die in einer zweiten, der ersten entgegen gesetzten Richtung (R2) propagiert, durch die Kammer (14) zu unterdrücken. Die Erfindung betrifft auch eine EUV-Strahlungserzeugungsvorrichtung (1), welche eine solche Treiberlaseranordnung (12), eine Vakuum-Kammer (11), in der ein Target-Material (8) anordenbar ist, sowie eine Strahlführungseinrichtung (5) zur Führung der in der ersten Richtung (R1) propagierenden Laserstrahlung (7, 7a) von der Treiberlaseranordnung (12) zu dem Target-Material (8) aufweist.
Abstract:
Laser-machining apparatus includes a carbon monoxide (CO) laser emitting a beam of laser-radiation having forty-four different wavelength components and optical elements for delivering the radiation to workpiece. An acousto-optic modulator is provided for modulating the beam on the workpiece. A birefringent plate is provided in the beam transported to the workpiece for randomly polarizing radiation incident on the workpiece. A minimum distance of the workpiece from the laser, and the number of different-wavelength components in the laser beam provides that no optical isolator is required for preventing feedback of radiation into the laser.
Abstract:
An optical amplifier module is configured as a multi-stage free-space optics arrangement, including at least an input stage and an output stage. The actual amplification is provided by a separate fiber-based component coupled to the module. A propagating optical input signal and pump light are provided to the input stage, with the amplified optical signal exiting the output stage. The necessary operations performed on the signal within each stage are provided by directing free- space beams through discrete optical components. The utilization of discrete optical components and free-space beams significantly reduces the number of fiber splices and other types of coupling connections required in prior art amplifier modules, allowing for an automated process to create a "pluggable" optical amplifier module of small form factor proportions.
Abstract:
a wavelength conversion device (1F) with which it is possible to avoid situations in which optical elements and the like are exposed to outside air, causing deterioration, and with which the conversion operation of nonlinear optical elements can be carried out rapidly, wherein a casing (700) is divided into regions by a partition wall (730), with one being provided with an incident window (720) and the other provided with an exit window (750). The wavelength conversion device comprises: a housing (80) that houses a nonlinear optical element (70); a stage (71) that is detachably fixed to the housing and that moves, together with the housing, a nonlinear optical element, in a direction that intersects with the optical axis of laser light that has entered from the incident window (720); optical systems (M5, M6) that guide laser light that has passed through openings (740) formed in the partition wall after being emitted from the housing (80) to the exit window (750); and a flexible tube (800) that connects the housing and the opening (740) formed in the partition wall. Purge gas supplied from the purge gas supply unit (910) to the housing (80) is supplied via a flexible tube to the other regions of the casing.
Abstract:
본 발명은 복수의 희토류 원소가 동시에 첨가된 단일모드 광섬유; 광섬유의 양단에 구비되며 광섬유에서 여기된 일정 파장 대역의 광을 전반사하는 제1 광섬유 격자 및 제2 광섬유 격자; 광섬유 내의 희토류 이온을 여기시키는 펌핑광을 생성하는 펌핑 광원; 및 광섬유와 연결되며 광원으로부터 생성된 광신호와 펌핑 광원에서 출력된 펌핑광을 광섬유로 전달하는 광결합기를 포함하는 광섬유를 이용한 광 증폭기를 제공하여, 복수의 희토류 원소가 첨가된 광섬유를 이용한 간단한 구성으로 효과적인 광신호의 증폭이 가능하다.
Abstract:
The invention relates to a CO2 laser which allows for rapid power modulation, particularly highly efficient Q-switching. The key concept is the sub-division of the resonator into a high-power branch, containing inter alia the active medium (1), and a low-power feedback branch (14), in which the power-sensitive beam-shaping elements, particularly the modulators, are arranged. This is made possible by a suitable arrangement of a polarisation beam splitter (5) and a lambda/4-phase shifter (2). The free adjustability of an angle phi between said two components permits the extremely flexible realisation of various operating modes, particularly optimisation of the feedback degree during pulse generation.
Abstract:
A laser apparatus may include a master oscillator (310) configured to output a laser beam, at least one amplifier (320) provided in a beam path of the laser beam, at least one saturable absorber gas cell (330) provided downstream from the at least one amplifier (321) and configured to contain a saturable absorber gas for absorbing a part of the laser beam, the part having a beam intensity equal to or lower than a predetermined beam intensity, and a cooling unit (3304,3305) for cooling the saturable absorber gas. The saturable absorber gas cell (330) includes a chamber (3301) filled with saturable absorber gas (3308) and delimited by input/output windows (3302,3303). Furthermore, the chamber comprises a pair of cooling plates (3304,3305). The cooling plates have flow channels (3306,3307) for water cooling.