DE3339348A1 - Neodymium-YAG laser with passive mode locking - Google Patents

Neodymium-YAG laser with passive mode locking

Info

Publication number
DE3339348A1
DE3339348A1 DE19833339348 DE3339348A DE3339348A1 DE 3339348 A1 DE3339348 A1 DE 3339348A1 DE 19833339348 DE19833339348 DE 19833339348 DE 3339348 A DE3339348 A DE 3339348A DE 3339348 A1 DE3339348 A1 DE 3339348A1
Authority
DE
Germany
Prior art keywords
dye
neodymium
yag laser
laser
passive mode
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Withdrawn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
DE19833339348
Other languages
German (de)
Inventor
Eckhard Dipl.-Phys. 8501 Eckental Schröder
Reinhardt 8501 Heroldsberg Thyzel
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.)
Aesculap AG
Original Assignee
Meditec 8501 Heroldsberg GmbH
Meditec 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 Meditec 8501 Heroldsberg GmbH, Meditec GmbH filed Critical Meditec 8501 Heroldsberg GmbH
Priority to DE19833339348 priority Critical patent/DE3339348A1/en
Publication of DE3339348A1 publication Critical patent/DE3339348A1/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Withdrawn legal-status Critical Current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
    • H01S3/10—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
    • H01S3/1106—Mode locking
    • H01S3/1112—Passive mode locking
    • H01S3/1115—Passive mode locking using intracavity saturable absorbers
    • 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
    • H01S3/139—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
    • H01S3/1392—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length by using a passive reference, e.g. absorption cell

Landscapes

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

Abstract

A description is given of a neodymium-YAG laser with passive mode locking, in which a control device automatically refills the dye. Refilling is always undertaken when the stationary transmission of the dye and/or the laser energy have fallen below specific critical values. In a preferred exemplary embodiment, an infrared diode is used to measure the stationary transmission of the dye.

Description

B e s c h r e i b u n g Description

Die Brfindung bezieht sich auf einen Neodym-YAG-Laser mit passivem Mode-locking mittels einer Farbstofflösung.The invention relates to a neodymium YAG laser with passive Mode locking using a dye solution.

Neodym-YAG-Laser, bei denen eine Modenselektion mit passivem Mode-locking stattfindet, sind bekannt. Bei den bekannten Neodym-YAG-Lasern muß - abhängig von der Zahl der ausgelösten Laserimpulse -» in kurzen Zeitabständen Farbstofflösung nachgefüllt werden. Darüberhinaus führt falsches Farbstoffnachfüllen häufig dazu, daß die Farbstofflösung vollständig ausgetauscht werden muß.Neodymium-YAG lasers, in which a mode selection with passive mode locking takes place are known. With the known neodymium-YAG lasers - depending on the number of laser pulses triggered - »dye solution at short intervals be refilled. In addition, incorrect dye replenishment often leads to that the dye solution must be completely replaced.

Der Erfindung liegt die Aufgabe zugrunde, einen Neodym-YAG-Laser mit passivem Mode-locking mittels einer Farbstofflösung zu schaffen, bei dem kein Nachfüllen der Farbstofflösung erforderlich ist.The invention is based on the object of having a neodymium-YAG laser Passive mode locking using a dye solution that does not require refilling the dye solution is required.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil der Patentansprüche 1 bis 3 angegebenen Merkmale gelöst.This object is achieved according to the invention by the in the characterizing part of the claims 1 to 3 specified features solved.

Brfindungsgemäß ist erkannt worden daß immer dann, wenn Nachfüllen der Farbstofflösung erforderlich ist, die stationäre Transmission der Farbstoffösung und die Laserenergie unter bestimmte Grenzwerte abgesunken sind.According to the invention it has been recognized that whenever refilling of the dye solution is required, the stationary transmission of the dye solution and the laser energy has dropped below certain limit values.

Dabei ist es insbesondere vorteilhaft, wenn gemäß Anspruch 3 das gemeinsame Auftreten beider Kriterien als Kriterium für das Nachfüllen der Farbstofflösung herangezogen Ireadenc da beispielsweise eine Änderung der Laserenergie auch anders Gründe, wie eine Resonator-Verstellung haben kann. Auch die stationäre Transmission des Farbstoffs kann sich ändern, ohne daß ein Nachfüllen des Farbstoffs erforderlich wäre.It is particularly advantageous if, according to claim 3, the common Both criteria appear as criteria for topping up the dye solution Ireadenc is used because, for example, a change in the laser energy is also different Reasons, how a resonator adjustment can have. Stationary transmission too of The dye can change without the need to replenish the dye were.

Das gleichzeitige Absinken beider Größen unter bestimmte kritische Werte bedeutet jedoch immer, daß ein Nachfüllen der Farbstofflösung erforderlich ist.The simultaneous drop in both sizes below certain critical values However, values always mean that refilling of the dye solution is necessary is.

Die erfindungsgemäße Verwendung einer Steuerung, die den Farbstoff selbsttätig nachfüllt, wenn beide als Kriterium verwendete Größen unter bestimmte Werte abgesunken sind, verlängert die Zeitperiode bis zum Austausch der Farbstofflösung von einigen Wochen nach dem Stand der Technik auf mehrere Monate.The inventive use of a controller that controls the dye automatically refills if both sizes used as criteria are below certain Values have decreased, the period of time until the dye solution is replaced increases from a few weeks according to the state of the art to several months.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous further developments of the invention are set out in the subclaims specified.

Die Messung der stationären Transmission kann mit einem von dem eigentlichen Laser unabhängigen Lichtgeber vorgenommen werden, der Licht im Wellenlängenbereich des Lasers emittiert. Dabei ist es insbesondere vorteilhaft, wenn gemäß Anspruch 5 eine Infrarot-Diode verwendet wird, deren Licht den Farbstoff durchstrahlt.The measurement of the stationary transmission can be done with one of the actual Laser independent light emitters are made, the light in the wavelength range emitted by the laser. It is particularly advantageous if according to claim 5 an infrared diode is used, the light of which shines through the dye.

Die Mittelung der Laserenergie über mehrere Laserimpulse gemäß Anspruch 6 verhindert, daß eine zufällige Schwankung der Laserenergie ein Nachfüllen der Farbstofflösung bewirkt.The averaging of the laser energy over several laser pulses according to claim 6 prevents accidental fluctuations in the laser energy from refilling the Dye solution causes.

Die Steuerung kann dabei als elektronische Steuerung beispielsweise unter Verwendung eines Mikrocomputers, aber auch unter Verwendung diskreter Schaltkreis aufgebaut sein, und zusätzlich noch andere Funktionen bei der Steuerung des Lasers übernehmen, beispielsweise kann die Steuerung auch die Energieregelung des Lasers übernehmen.The controller can be used as an electronic controller, for example using a microcomputer, but also using discrete circuitry be constructed, and also other functions in the control of the laser take over, for example the control can also regulate the energy of the laser take over.

Claims (6)

Neodym-YAG-Laser mit passivem Mode-locking Patentansprüche (?. Neodym-YAG-Laser mit passivem Mode-locking mittels einer Farbstofflösung, dadurch gekennzeichnet, daß eine Steuerung den Farbstoff selbsttätig nachfüllt, wenn die stationäre Transmission des Farbstoffs unter einen bestimmten kritischen Wert abgesunken ist. Neodymium YAG laser with passive mode locking patent claims (?. Neodymium YAG laser with passive mode locking using a dye solution, characterized in that that a control automatically refills the dye when the stationary transmission of the dye has dropped below a certain critical value. 2. Neodym-YAG-Laser mit passivem Mode-locking mittels einer Farbstofflösung, dadurch gekennzeichnet, daß eine Steuerung den Farbstoff selbsttätig nachfüllt, wenn die laserenergie unter einen bestImmten kritischen Wert abgesunken ist.2. Neodymium YAG laser with passive mode locking using a dye solution, characterized in that a controller automatically refills the dye, if the laser energy has dropped below a certain critical value is. 3. Neodym-YAG-Laser mit passivem Mode-locking mittels einer Farbstofflösung, dadurch gekennzeichnet, daß eine Steuerung den Farbstoff selbsttätig nachfüllt, wenn sowohl die stationäre Transmission des Farbstoffs als auch die Laserenergie jeweils unter einen bestimmten kritischen Wert abgesunken sind.3. Neodymium YAG laser with passive mode locking using a dye solution, characterized in that a controller automatically refills the dye, when both the stationary transmission of the dye and the laser energy each have fallen below a certain critical value. 4. Neodym-YAG-Laser nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die stationäre Transmission des Farbstoffs mit Licht mit einer Wellenlänge im Bereich der Laserwellenlänge gemessen wird.4. Neodymium-YAG laser according to claim 1 or 3, characterized in that that the stationary transmission of the dye with light with a wavelength im The range of the laser wavelength is measured. s. Neodym-YAG-Laser nach Anspruch 4, dadurch gekennzeichnet, daß eine Infrarot-Diode das Licht für die Messung der stationären Transmission emittiert.See neodymium-YAG laser according to claim 4, characterized in that one Infrared diode that emits light for measuring the stationary transmission. 6. Neodym-YAG-Laser nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Steuerung die Laserenergie über mehrere Laserimpulse mittelt.6. Neodymium-YAG laser according to one of claims 2 to 5, characterized in that that the control averages the laser energy over several laser pulses.
DE19833339348 1983-10-29 1983-10-29 Neodymium-YAG laser with passive mode locking Withdrawn DE3339348A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833339348 DE3339348A1 (en) 1983-10-29 1983-10-29 Neodymium-YAG laser with passive mode locking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833339348 DE3339348A1 (en) 1983-10-29 1983-10-29 Neodymium-YAG laser with passive mode locking

Publications (1)

Publication Number Publication Date
DE3339348A1 true DE3339348A1 (en) 1985-05-09

Family

ID=6213074

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833339348 Withdrawn DE3339348A1 (en) 1983-10-29 1983-10-29 Neodymium-YAG laser with passive mode locking

Country Status (1)

Country Link
DE (1) DE3339348A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8531670B2 (en) 2010-07-05 2013-09-10 Emz-Hanauer Gmbh & Co. Kgaa Optical sensor, in particular for installation in a household washing machine or dishwasher

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR427128A (en) * 1910-03-12 1911-07-27 Wladislaus Bratkowski Method for measuring and regulating the concentration of coloring solutions
US2978951A (en) * 1958-02-13 1961-04-11 Proctor Silex Corp Method and system of color monitoring
DE2104508A1 (en) * 1970-04-21 1971-11-11 Jenoptik Jena Gmbh Cell for passive quality control
US3746864A (en) * 1972-01-03 1973-07-17 New Brunswick Scientific Co Device for sensing and controlling optical density
US3805074A (en) * 1973-01-02 1974-04-16 Texas Instruments Inc Spectral scan air monitor
DE2635171A1 (en) * 1976-08-05 1978-02-09 Hartmann & Braun Ag Photoelectric gas analyser with tunable laser radiation source - has radiation passing through test gas sample to detector feeding logarithmic signal processing circuit
FR2525779A1 (en) * 1982-04-22 1983-10-28 Essilor Int DEVICE COMPRISING THE IMPLEMENTATION OF A DEGRADABLE SOLUTION OF ANY PRODUCT, FOR EXAMPLE OF A SATURABLE ABSORBER, IN PARTICULAR FOR LASER

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR427128A (en) * 1910-03-12 1911-07-27 Wladislaus Bratkowski Method for measuring and regulating the concentration of coloring solutions
US2978951A (en) * 1958-02-13 1961-04-11 Proctor Silex Corp Method and system of color monitoring
DE2104508A1 (en) * 1970-04-21 1971-11-11 Jenoptik Jena Gmbh Cell for passive quality control
US3746864A (en) * 1972-01-03 1973-07-17 New Brunswick Scientific Co Device for sensing and controlling optical density
US3805074A (en) * 1973-01-02 1974-04-16 Texas Instruments Inc Spectral scan air monitor
DE2635171A1 (en) * 1976-08-05 1978-02-09 Hartmann & Braun Ag Photoelectric gas analyser with tunable laser radiation source - has radiation passing through test gas sample to detector feeding logarithmic signal processing circuit
FR2525779A1 (en) * 1982-04-22 1983-10-28 Essilor Int DEVICE COMPRISING THE IMPLEMENTATION OF A DEGRADABLE SOLUTION OF ANY PRODUCT, FOR EXAMPLE OF A SATURABLE ABSORBER, IN PARTICULAR FOR LASER

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DOWNS, D.C. et al.: Stabilizing the Output of a Q-Switched Laser. In US-Z.: IEEE Journal of Quantum Electronics, Vol. QE-14, No. 8, August 1978, 571-573 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8531670B2 (en) 2010-07-05 2013-09-10 Emz-Hanauer Gmbh & Co. Kgaa Optical sensor, in particular for installation in a household washing machine or dishwasher

Similar Documents

Publication Publication Date Title
DE3110773C2 (en)
DE102006055894B4 (en) sensor device
CH665291A5 (en) METHOD FOR AUTOMATICALLY STABILIZING THE MEASUREMENT RESULTS DELIVERED BY A SCINTILLATION DETECTOR AND ARRANGEMENT FOR IMPLEMENTING THE METHOD.
EP1541978B1 (en) Method and device for monitoring the orientation of a measuring device and measuring device
DE2914147A1 (en) IN-SITU FLUOROMETER
EP0511542A2 (en) Radiation detector with automatic drift stabilisation
DE2420194B2 (en) Electro-optical distance measuring device with averaging of the phase difference values
DE4208146B4 (en) Method and arrangement for measuring breakdown voltage
DE2616097A1 (en) METHOD AND DEVICE FOR MEASURING THE CROSS SECTIONAL UNEQUALITY OF YARNS, YARNS AND BANDS
DE2401906C3 (en) Device for measuring visibility in a measurement area
EP2910910A1 (en) Sensor for determining a fill state
DE1809520B2 (en) Method for automatic drift stabilization when measuring radiation with a detector
DE3339348A1 (en) Neodymium-YAG laser with passive mode locking
DE3728305A1 (en) SEMICONDUCTOR LASER WITH CONSTANT DIFFERENTIAL QUANTUM EXCHANGER OR CONSTANT OPTICAL OUTPUT
DE3033381A1 (en) LASER ARRANGEMENT FOR GENERATING STABILIZED IMPULSES
DE4421073C1 (en) Laser levelling arrangement
DE3811830A1 (en) CIRCUIT ARRANGEMENT FOR CARRYING OUT LIGHT INTENSITY MEASUREMENTS
EP0259699A1 (en) Optical distance measurement device
DE60314374T2 (en) Maintaining a desirable performance of optical emitters at extreme temperatures
DE2738558A1 (en) CIRCUIT ARRANGEMENT FOR MEASURING CURRENTS AT HIGH POTENTIAL
DE10013041A1 (en) Operating light with fluorescent lamp involves setting manufacturer's rated loading for detected lamp type in normal operation, reducing/ending if critical temperature reached/exceeded
DE3633325C2 (en)
DE60124459T2 (en) Method and apparatus for repeating a power consumption pulse in a modular meter
DE4222643A1 (en) Device for measuring pulse transit times
DE2819979C2 (en) Method for measuring the attenuation of optical fibers

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: AESCULAP AG, 7200 TUTTLINGEN, DE

8130 Withdrawal