DE3705971A1 - Solid-state laser apparatus - Google Patents

Solid-state laser apparatus

Info

Publication number
DE3705971A1
DE3705971A1 DE19873705971 DE3705971A DE3705971A1 DE 3705971 A1 DE3705971 A1 DE 3705971A1 DE 19873705971 DE19873705971 DE 19873705971 DE 3705971 A DE3705971 A DE 3705971A DE 3705971 A1 DE3705971 A1 DE 3705971A1
Authority
DE
Germany
Prior art keywords
laser
solid
continuous wave
state laser
lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19873705971
Other languages
German (de)
Inventor
Erfinder Wird Nachtraeglich Benannt Der
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MIKRON LASER SYSTEME GmbH
Original Assignee
MIKRON LASER SYSTEME GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MIKRON LASER SYSTEME GmbH filed Critical MIKRON LASER SYSTEME GmbH
Priority to DE19873705971 priority Critical patent/DE3705971A1/en
Publication of DE3705971A1 publication Critical patent/DE3705971A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
    • H01S3/092—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1022—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
    • H01S3/1123—Q-switching
    • H01S3/117—Q-switching using intracavity acousto-optic devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1312—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

In the case of a solid-state laser, a lamp (2) for continuous-wave excitation and a lamp (3) for pulsed excitation are arranged in the pumping chamber (11), which lamps illuminate the same solid-state bar (1). In consequence, inter alia, both operating modes of the laser can be used simultaneously. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Festkörper-Lasergerät. Gerä­ te dieser Art sind seit geraumer Zeit im Handel, insbesondere zur Beschriftung und/oder sonstigen Bearbeitung von Materialien.The invention relates to a solid-state laser device. Device Te of this type have been on the market for some time, especially for labeling and / or other processing of materials.

Es gibt eine Reihe von Anwendungsfällen, in denen der Laser in Dauerstrichbetrieb arbeitet und auch Anwendungsfälle, in denen eine gepulste Anregung zur Erzeugung von Laserpulsen ver­ wendet wird.There are a number of use cases where the laser works in continuous wave mode and also use cases in which ver a pulsed excitation for generating laser pulses is applied.

Aus technologischen Gründen wäre es häufig wünschenswert, gleichzeitig gepulste und Dauerstrichanregung zur Verfügung zu haben. Verwendet man hierzu zwei getrennte Laser, so ist es relativ schwierig, wenn nicht gar unmöglich, die beiden Laser­ strahlen so zu kombinieren, daß beide Strahlen auf den gleichen Punkt auftreffen.For technological reasons, it would often be desirable pulsed and continuous wave excitation are available at the same time to have. If you use two separate lasers for this, it is the two lasers are relatively difficult, if not impossible rays to combine so that both rays are on the same Hit point.

Die Aufgabe der vorliegenden Erfindung besteht darin, ein Fest­ körper-Lasergerät zu schaffen, mit dem neben Dauer-Betrieb und Puls-Betrieb gleichzeitig auch die Möglichkeit gegeben ist, bei­ de Betriebsarten gemeinsam auszuführen.The object of the present invention is a festival to create body laser device with which in addition to continuous operation and Pulse operation is also possible at the same time to run the operating modes together.

Diese Aufgabe wird erfindungsgemäß durch folgende Merkmale gelöst:This object is achieved by the following features solved:

  • a) in der Pumpkammer des Lasers sind mindestens eine Lampe für gepulste Anregung angeordnet,a) in the pumping chamber of the laser are at least one lamp for pulsed excitation arranged,
  • b) die Lampen beleuchten mittels eines gemeinsamen Reflektors den gleichen Festkörper-Laserstab undb) illuminate the lamps by means of a common reflector the same solid-state laser rod and
  • c) der ebenfalls gemeinsame Resonator besteht aus einem hoch­ reflektierenden Rückspiegel und aus einem teildurchlässigen Auskoppelspiegel.c) the also common resonator consists of a high reflective rear view mirror and made of a partially translucent Decoupling mirror.

Auf diese Weise ist es möglich, je nachdem ob nur eine oder beide Lampen in Betrieb sind, verschiedene Laser-Betriebsarten zu überlagern. Dies ist insbesondere sehr interessant bei der Beschriftung von markierten Kunststoffteilen. Ähnliches gilt für das Löten, insbesondere bei der Herstellung von Kontakten für miniaturisierte Bauelemente im Elektronik-Bereich.In this way it is possible, depending on whether only one or both lamps are operating, different laser modes to overlay. This is particularly interesting with the Labeling of marked plastic parts. The same applies to soldering, especially when making contacts for miniaturized components in the electronics sector.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels sei die Erfindung näher beschrieben; es zeigen:Based on an embodiment shown in the drawing be the invention described in more detail; show it:

Fig. 1 das Prinzip des Lasergerätes und Fig. 1 shows the principle of the laser device and

Fig. 2 verschiedene Betriebsarten des Lasergerätes. Fig. 2 different modes of operation of the laser device.

In der Pumpkammer 11 des schematisch gezeichneten Lasergerätes ist eine Lampe 2 für Dauerstrichanregung und eine Lampe 3 für gepulste Anregung angeordnet. Die beiden Lampen beleuchten mit­ tels eines gemeinsamen Reflektors 4 den gleichen Festkörper- Laserstab 1. Der gemeinsame Resonator besteht aus einem hoch­ reflektierenden Rückspiegel 9 und aus einem teildurchlässigen Auskoppelspiegel 8. Im Resonator ist noch ein akustooptischer Güteschalter 7 angeordnet, durch den die Leistung gesteigert werden kann. Der im Laser erzeugte Strahl 13 gelangt durch den teildurchlässigen Spiegel 8 auf eine steuerbare Optik 10 und von hieraus über eine weitere Optik 12 auf das zu bearbeitende Werk­ stück 16.A lamp 2 for continuous wave excitation and a lamp 3 for pulsed excitation are arranged in the pump chamber 11 of the schematically drawn laser device. The two lamps illuminate the same solid-state laser rod 1 by means of a common reflector 4 . The common resonator consists of a highly reflective rear-view mirror 9 and a partially transparent decoupling mirror 8 . An acousto-optical Q-switch 7 is also arranged in the resonator, by means of which the power can be increased. The beam 13 generated in the laser passes through the partially transparent mirror 8 to a controllable optics 10 and from there via a further optics 12 to the workpiece 16 to be processed.

Da jeder der Lampen 2 und 3 eine gesonderte Stromversorgung 5 bzw. 6 zugeordnet ist, kann auch jede dieser Lampen individuell für sich betrieben werden. Die Steuerung dieser Vorgänge, ebenso wie die Steuerung des Strahles 13 bzw. des Werkstückes 16, wird durch eine Recheneinheit 14 vorgenommen.Since each of the lamps 2 and 3 is assigned a separate power supply 5 or 6 , each of these lamps can also be operated individually. The control of these processes, as well as the control of the beam 13 or the workpiece 16 , is carried out by a computing unit 14 .

Wie Fig. 2 erkennen läßt, in der die Laserleistung P über der Zeit t aufgetragen ist, ist es entweder möglich im Dauerstrich­ betrieb zu fahren (a) oder im reinen Pulsbetrieb (b) oder beide Betriebsarten zu überlagern (c), wobei die Amplitude im Dauerstrichbetrieb mit PD und die Amplitude im Pulsbetrieb mit PP bezeichnet sind. Hinsichtlich der Daten können z. B. folgende Werte erreicht werden: 25 W Dauerstrichleistung, 2,5 kW Spitzenleistung im Pulsbetrieb bei einer Pulsdauer von 200 µs und mit Hilfe des Güteschalters eine Spitzenleistung bis 25 kW bei einer Pulsdauer von 200 ns.As can be seen in FIG. 2, in which the laser power P is plotted over time t , it is possible to either operate in continuous wave mode (a) or in pure pulse mode (b) or to overlay both modes (c), the amplitude in continuous wave mode with P D and the amplitude in pulse mode with P P are designated. With regard to the data, e.g. For example, the following values can be achieved: 25 W continuous wave power, 2.5 kW peak power in pulse mode with a pulse duration of 200 µs and with the aid of the Q-switch a peak power of up to 25 kW with a pulse duration of 200 ns.

Wie bereits bemerkt, eignet sich das Verfahren besonders für Beschriftungen, die sowohl aus einer durchgehenden Spur in der Oberfläche des Werkstückes als auch einzelnen, tieferreichen­ den Punkten bestehen soll. Ebenfalls ist eine Verbesserung des Lötens mit Laserstrahlen durch gezielte Zeitsteuerung der Energiezufuhr möglich.As already noted, the method is particularly suitable for Captions that consist of a continuous track in the Surface of the workpiece as well as individual, deeper the points should pass. An improvement of the Soldering with laser beams through targeted time control of the Energy supply possible.

Insgesamt gesehen bietet das vorstehend geschilderte Gerät dort große Vorteile, wo die Wirkung von Dauerstrich und gepulster Laserstrahlung zeitlich und örtlich übereinstimmend genutzt werden soll.Overall, the device described above offers there great advantages where the effect of continuous wave and pulsed Laser radiation used according to time and location shall be.

Claims (4)

1. Festkörper-Lasergerät, gekennzeichnet durch folgende Merkmale:
  • a) in der Pumpkammer (11) des Lasers sind mindestens eine Lampe (2) für Dauerstrichanregung und mindestens eine Lam­ pe (3) für gepulste Anregung angeordnet,
  • b) die Lampen (2, 3) beleuchten mittels eines gemeinsamen Reflektors (4) den gleichen Festkörper-Laserstab (1) und
  • c) der ebenfalls gemeinsame Resonator besteht aus einem hoch­ reflektierenden Rückspiegel (9) und aus einem teildurch­ lässigen Auskoppelspiegel (8).
1. Solid-state laser device, characterized by the following features:
  • a) at least one lamp ( 2 ) for continuous wave excitation and at least one lamp ( 3 ) for pulsed excitation are arranged in the pump chamber ( 11 ) of the laser,
  • b) the lamps ( 2 , 3 ) illuminate the same solid-state laser rod ( 1 ) and by means of a common reflector ( 4 )
  • c) the also common resonator consists of a highly reflective rear-view mirror ( 9 ) and a partially transparent coupling-out mirror ( 8 ).
2. Festkörper-Lasergerät nach Anspruch 1, gekennzeich­ net durch einen im Resonator (8, 9) angeordneten aku­ stooptischen Güteschalter (7).2. Solid-state laser device according to claim 1, characterized by a in the resonator ( 8 , 9 ) arranged aku sto-optical Q-switch ( 7 ). 3. Anwendung des Lasers nach Anspruch 1 zur Beschriftung von Oberflächen mit gleichzeitiger Dauerstrich und gepulster Laser­ strahlung.3. Application of the laser according to claim 1 for labeling Surfaces with simultaneous continuous wave and pulsed laser radiation. 4. Anwendung des Lasers nach Anspruch 1 für Lötzwecke mit zeit­ lich und örtlich übereinstimmender Benutzung von Dauerstrich und gepulster Laserstrahlung.4. Application of the laser according to claim 1 for soldering purposes with time same and locally corresponding use of continuous wave and pulsed laser radiation.
DE19873705971 1987-02-25 1987-02-25 Solid-state laser apparatus Withdrawn DE3705971A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873705971 DE3705971A1 (en) 1987-02-25 1987-02-25 Solid-state laser apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873705971 DE3705971A1 (en) 1987-02-25 1987-02-25 Solid-state laser apparatus

Publications (1)

Publication Number Publication Date
DE3705971A1 true DE3705971A1 (en) 1988-09-08

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DE19873705971 Withdrawn DE3705971A1 (en) 1987-02-25 1987-02-25 Solid-state laser apparatus

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2665987A1 (en) * 1990-08-20 1992-02-21 Cheval Freres Sa GENERATING DEVICE FOR A CONTINUOUS OR PULSE LASER BEAM.
DE10055179A1 (en) * 2000-11-08 2002-05-23 Lisa Laser Products Ohg Fuhrbe Laser unit used in surgical applications, has laser applicator that transmits continuous and pulsed laser radiation to surgical application site
FR2818815A1 (en) * 2000-12-22 2002-06-28 Thomson Csf Telemetry and imaging laser capable of emitting high and low frequencies, has central laser area and first and second pump devices operating at optimized high and low frequencies
WO2002054547A2 (en) * 2000-12-28 2002-07-11 Robert Bosch Gmbh Laser beam source

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461005A (en) * 1980-10-27 1984-07-17 Ward Ernest M High peak power, high PRF laser system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461005A (en) * 1980-10-27 1984-07-17 Ward Ernest M High peak power, high PRF laser system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
W. Brunner und K. Junge: Lasertechnik, 1. Aufl., 1982, S. 138-161 und S. 328-367 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2665987A1 (en) * 1990-08-20 1992-02-21 Cheval Freres Sa GENERATING DEVICE FOR A CONTINUOUS OR PULSE LASER BEAM.
EP0472466A1 (en) * 1990-08-20 1992-02-26 Cheval Freres S.A. Device for generating a continuous or pulsed laser beam
DE10055179A1 (en) * 2000-11-08 2002-05-23 Lisa Laser Products Ohg Fuhrbe Laser unit used in surgical applications, has laser applicator that transmits continuous and pulsed laser radiation to surgical application site
DE10055179B4 (en) * 2000-11-08 2006-03-02 Lisa Laser Products Ohg Fuhrberg & Teichmann Operation of a laser device, in particular for surgical applications
FR2818815A1 (en) * 2000-12-22 2002-06-28 Thomson Csf Telemetry and imaging laser capable of emitting high and low frequencies, has central laser area and first and second pump devices operating at optimized high and low frequencies
WO2002054547A2 (en) * 2000-12-28 2002-07-11 Robert Bosch Gmbh Laser beam source
WO2002054547A3 (en) * 2000-12-28 2003-02-13 Bosch Gmbh Robert Laser beam source
US7123632B2 (en) 2000-12-28 2006-10-17 Robert Bosch Gmbh Laser beam source

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