摘要:
The invention relates to a laser comprising a housing, such as at least one laser tube (22), for a laser gas or mixture of laser gases, an electrode system with at least two electrodes (29, 30) and a voltage supply unit by means of which a voltage can be applied to electrodes (29, 30) of the electrode system so that a discharge zone is formed in the laser gas or laser gas mixture in which said laser gas or laser gas mixture is excited. The laser further comprises a device for modifying the distribution of laser light intensity across the laser beam cross-section (mode). The device for modifying said mode comprises means for variably adjusting the amplification profile of the laser across the excitation cross-section of the housing containing the laser gas or laser gas mixture.
摘要:
In one discharge tube (3) in which laser gas flows, a plurality of microwave generating units composed of microwave power sources (4), magnetrons (1) and waveguides (2) are disposed, and each magnetron (1) oscillates intermittently by switching drive of the microwave power source (4). A main controller (6) gives a reference clock to a power source unit (5) composed of said plurality of microwave power sources (4). By this reference clock, adjacent microwave power sources (4) in the power source unit (5) are switched and driven at a predetermined phase difference through a phase shifter (7). Accordingly, discharge interference in adjacent discharge areas (10) is avoided, so that a stable laser beam output may be obtained.
摘要:
Beschrieben wird ein Laserresonator mit einem ersten (3) und einem zweiten (4) Endspiegel und mit koaxialen Elektroden (1,2), zwischen denen in Richtung einer Symmetrieachse des Laserresonators hin- und herreflektierte Laserstrahlung ein Resonatorvolumen ringförmigen Querschnitts abschnittweise azimutal durchläuft. Die Erfindung zeichnet sich dadurch aus, daß der zweite Endspiegel (4) ein im wesentlichen konischer Spiegel ist, der auftreffende Laserstrahlung jeweils in azimutal gegenüberliegende Bereiche des Resonatorvolumens umlenkt.
摘要:
This invention relates to an excimer laser oscillation apparatus which has a laser chamber (20) which stores a laser gas containing a gas mixture of at least one inert gas selected from the group consisting of Kr, Ar, and Ne, and F 2 gas, and in which an inner surface thereof has a reflection-free surface (3) with respect to light of a desired wavelength of 248 nm, 193 nm, or 157 nm, and the uppermost surface of the inner surface consists of a fluoride, an optical resonator which is made up of a pair of reflection mirrors (5,6) arranged to sandwich the laser chamber (20) therebetween, and in which the reflectance of the reflection mirror (6) on the output side is 90% or more and microwave introduction means (300,303,302), arranged on the laser chamber (20), for continuously exciting the laser gas in the laser chamber (20).
摘要:
A transverse RF pumped gas laser has a large area discharge which is of generally rectangular shape in all plan views. In cross-section the geometry of the discharge has a longer and a shorter dimension, the longer dimension being between the electrodes (12,14) to which RF power is supplied and the shorter dimension, suitable for guiding intracavity laser light, being defined by ceramic side walls (16,18). The longer dimension has a Fresnel number of at least unity.
摘要:
Zur Erleichterung der Zündung des Bandleiterlasers ist eine Hilfentladungsstrecke vorgesehen, die entweder durch Segmentierung der HF-Elektrode (2) oder durch mindestens eine längs der Elektrodenfläche (5,6) angeordnete, der Entladungsstrecke benachbarte Hilfselektrode (11,12) gebildet ist.
摘要:
Die Masseelektrode (1, 2) ist an mindestens einer, vorzugsweise an mehreren Stellen entlang ihrer axialen Ausdehnung mittels elektrisch leitender Verbindungselemente mit der Außenwand (10) verbunden.
摘要:
According to the present invention there is provided a laser apparatus capable of efficient oscillation with an excitation power source (3) with comparatively low frequency, wherein discharge (DC) is obliquely generated within the rectangular section of a discharge space (4). There is also provided a laser apparatus with a pair of preliminary discharge excitation electrodes (112,222) which can readily initiate discharge. There is further provided a laser apparatus capable of efficient oscillation with an excitation power source (3) with comparatively low frequency, wherein provided is a pair of discharge excitation electrodes (1,2) located in the major side direction of discharge space (4) whose length is more than three times as long as that of minor side direction thereof. There is further provided a laser apparatus with a pair of discharge excitation electrodes (1,2) whose dimension is smaller than that of a pair of dielectric plates (10,20), which apparatus can prevent undesirable discharge. There is also provided a laser apparatus with more than three discharge spaces (4a,4b,4c) at least one of which is given a lower electric field having the apparatus oscillate efficiently. There is further provided a laser apparatus with an improved oscillation efficiency wherein furnished are dielectric double pipes (105,205) creating a substantially large discharge space (4).