DE2431966A1 - Poly-methine salt in dimethyl sulphoxide as dye laser medium - for high pulse frequency, infra-red-emitting, optically pumped systems - Google Patents

Poly-methine salt in dimethyl sulphoxide as dye laser medium - for high pulse frequency, infra-red-emitting, optically pumped systems

Info

Publication number
DE2431966A1
DE2431966A1 DE2431966A DE2431966A DE2431966A1 DE 2431966 A1 DE2431966 A1 DE 2431966A1 DE 2431966 A DE2431966 A DE 2431966A DE 2431966 A DE2431966 A DE 2431966A DE 2431966 A1 DE2431966 A1 DE 2431966A1
Authority
DE
Germany
Prior art keywords
dye
laser
iodide
optically pumped
solns
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.)
Pending
Application number
DE2431966A
Other languages
German (de)
Inventor
Olaf Hildebrand
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.)
HILDEBRAND OLAF DC PHYS
Original Assignee
HILDEBRAND OLAF DC PHYS
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 HILDEBRAND OLAF DC PHYS filed Critical HILDEBRAND OLAF DC PHYS
Priority to DE2431966A priority Critical patent/DE2431966A1/en
Publication of DE2431966A1 publication Critical patent/DE2431966A1/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/20Liquids
    • H01S3/213Liquids including an organic dye

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

Abstract

Dyes solns. for dye lasers, for use in optically pumped dye laser systems with high pulse frequency, comprise solns. of polymethine salts (I) in Me2SO, (I) being as follows: 3,3'-dimethyl-2,2'-oxatricarbocyanine iodide (Ia) and the corresp. 3,3'-diethyl deriv. (Ib); 1,3,3,1',3',3'-hexamethyl-2,2'-indotricarbocyanine iodide (Ic); 3,3'-diethyl-2,2'-thiatricarbocyanine iodide (Id); 3,3'-diethyl-2,2'-(4,5,4',5'-dibenzo)thiatricarbocyanine iodide (Ie); 3,3'-diethyl-10-chloro-2,2'-(6,7,6',7'-dibenzo)thiadicarbocyanine iodide (If) and the corresp. (4,5,4',5'-dibenzo) deriv. (Ig). Teh dye solns. are used for the prodn. of coherent radiation in the near IR wavelength range, esp. with a N2 laser for generating the stimulating light. Direct stimulation with a N2 laser is possible and emission from the near IR range up to 1 mu m can be obtd. using suitable mixts. of various (I) solns., with frequencies up to 1 kHz.

Description

St imulare Medien für Farbstofflaser im nahen Infrarot Die Erfindung betrifft Farbstofflösungen zur Verwendung in Farbstofflasern zur Erzeugung von kohärenter elektromagnetischer Strahlung im Wellenlängenbereich des nahen Infrarot, insbesondere für die Verwendung in Farbstofflasersystemen mit hohen Pulswiederholfreuenzen, bei denen als Erregungslichtgenerator ein N2(e2Laser benutzt wird. Die Anregung der Farbstoffmoleküle erfolgt hierbei auf direktem Wege durch Absorption der Strahlung des N2(Ne)-Laser bei 3771 Å. Der mechanische Aufbau des Farbstofflasersystems mit einem N2(e)-Laser als Erregungslichtgenerator wird in Offenlegungsschrift 2057791 beschrieben. St imulare Media for dye lasers in the near infrared The invention relates to dye solutions for use in dye lasers for generating coherent electromagnetic radiation in the near infrared wavelength range, in particular for use in dye laser systems with high pulse repetition frequencies, in which an N2 (e2 laser is used as the excitation light generator Dye molecules take place here directly by absorbing the radiation from the N2 (Ne) laser at 3771 Å. The mechanical structure of the dye laser system with an N2 (e) laser as the excitation light generator is described in Offenlegungsschrift 2057791.

Bisher konnten Farbstofflaser im Infrarotbereich, bedingt durch ihre Pumplichtquellen (Rubin-Riesenimpulslaser, Blitzlampen) nur bei niedrigen Pulswiederholfrequenzen betrieben werden. (Vergl. Patentschrift 1589 930). Mit Farbstofflasersystemen, die N2(Me)-Laser als Erregungslichtgenerator benutzen und deshalb mit höheren Pulswiederholfrequenzen arbeiten, konnte Laseremission nur bis etwa 7720 Ä erzielt werden. (Vergl. dazu: F. B. Dunning and E. D. Stokes; Opt. Gommun. 6, 160 (1972)). So far, dye lasers in the infrared range, due to their Pump light sources (giant ruby pulse lasers, flash lamps) only at low pulse repetition frequencies operate. (See patent specification 1589,930). With dye laser systems that Use N2 (Me) lasers as excitation light generators and therefore with higher pulse repetition frequencies work, laser emission could only be achieved up to about 7720 Å. (Compare with: F.B. Dunning and E.D. Stokes; Opt. Commun. 6, 160 (1972)).

Für die meisten Anwendungen von Farbstofflasern in Forschung und Technik, wie z. B. der Spektroskopie, sind hohe Wiederholfrequenzen nötig. Farbstofflösungen für den nahen Infrarotbereich in der bisher verwendeten Zusammensetzung konnten nicht direkt mit dem im UV-emittierenden N2-Laser angeregt werden. Deshalb stand für den nahen Infrarotbereich bisher noch kein Farbstofflasersystem zur Verfügung, das mit hohen Wiederholfrequenzen arbeitet und deshalb Anwendung in Forschung und Technik finden könnte. For most dye laser applications in research and Technology, such as B. in spectroscopy, high repetition frequencies are necessary. Dye solutions for the near infrared range in the composition previously used are not directly excited by the N2 laser emitting UV rays. Therefore stood no dye laser system is yet available for the near infrared range, that works with high repetition frequencies and is therefore used in research and Technology could find.

Der Erfindung liegt die Aufgabe zugrunde, durchstimmbare Laseremission im nahen Infrarotbereich bei hohen Wiederholfrequenzen zu erzielen. Diese Aufgabe wird erfindungsmäßig dadurch gelöst, daß geeignete Farbstoffe und Lösungsmittel so gewählt werden, daß direkte Anregung mit einem N2-Laser ermöglicht wird. Durch geeignetes Mischen verschiedener Farbstofflösungen ist es möglich, durch Anregung der Farbstoffe mit einem N2-Laser stimulierte Emission im gesamten nahen Infrarotbereich bis hin zu 1 µm stimulierte Emission zu erhalten. The invention is based on the object of tunable laser emission in the near infrared range at high repetition frequencies. This task will according to the invention solved in that suitable dyes and Solvents are chosen so that direct excitation with an N2 laser is possible will. By appropriately mixing different dye solutions, it is possible through Excitation of the dyes with an N2 laser stimulated emission throughout the near Infrared range down to 1 µm to get stimulated emission.

Bei Verwendung dieser Farbstofflösungen in N2-Laser gepumpten Farbetofilasersystemen ist es möglich, Laseremission im nahen Infrarotbereich bis 1 ßm zu erzielen, wobei die Pulswiederholfrequenz durch die des N2-Lasers gegeben wird. Da somit z. Zt. Wiederholfrequenzen bis 1 kllz erreicht werden können, wird durch die Erfindung eine gewerbliche Verwertung von Infrarot-Farbstofflasern in Forschung und Technik überhaupt erst ermöglicht. When using these dye solutions in N2 laser pumped color fiber laser systems it is possible to achieve laser emission in the near infrared range up to 1 µm, whereby the pulse repetition frequency is given by that of the N2 laser. Since z. Currently Repetition frequencies up to 1 kllz can be achieved by the invention commercial use of infrared dye lasers in research and technology made possible in the first place.

Ausführungsbeispiele für die Erfindung sind in Tab. 1 gegeben. Durch Lösung der in Tab. 1 aufgeführten Polymethinsalze in Dimethylsufoxid in den angegebenen Konzentrationen erhält man mit einem 100 kW-N2-Anregungslaser bei Wiederholfrequenzen von 100 Hz Laseremission in Wellenlängenbereichen und mit Ausgangs leistungen wie in Abb. 1 dargestellt Demnach ist bei Verwendung der angegebenen Farbstofflösungen Farbstoffemission bei hohen Wiederholfrequenzen im gesamten Spektralbereich von 7700 t bis 1m n möglich, wobei die Ausgangsleistungen bei Verwendung eines 100 kW N2-Lasers als Erregungslichtgenerator typisch bei einigen kW liegen. Die einzelnen Laseremissionsbereiche lassen sich durch Mischen von verschiedenen Farbstofflösungen bezüglich ihres Wellenlängenbereiches verschieben.Exemplary embodiments of the invention are given in Tab. By dissolving the polymethine salts listed in Tab. 1 in dimethyl sulfoxide in the specified concentrations, with a 100 kW N2 excitation laser at repetition frequencies of 100 Hz, laser emission in wavelength ranges and with output powers as shown in Fig. 1 is obtained Accordingly, when using the specified dye solutions, dye emission is possible at high repetition frequencies in the entire spectral range from 7700 t to 1m n, with the output power typically being a few kW when using a 100 kW N2 laser as the excitation light generator. The individual laser emission areas can be shifted in terms of their wavelength range by mixing different dye solutions.

Claims (2)

Patentansprüche: Farbstofflösungen für Farbstofflaser zur Verwendung in optisch gepumpten Farbstofflasersystemen mit hohen Pulswiederholfrequenzen dadurch geennzeichnet, daß als Farbstofflösungen in den Farbstofflasersystemen Lösungen derClaims: Dye solutions for dye lasers for use in optically pumped dye laser systems with high pulse repetition frequencies indicated that as dye solutions in the dye laser systems solutions the in Tab. 1 angegebenen Polymethinsalze in Dimethylsulfoxid verwendet werden. Polymethine salts given in Table 1 in dimethyl sulfoxide are used will. 2. Farbstofflösungen nach Anspruch 1 dadurch gekennzeichnet, daß Mischungen der Farbstofflösungen nach Anspruch 1 in optssch gepumpten Farbstofflasersystemen mit hohen Wiederholfrequenzen verwendet werden.2. Dye solutions according to Claim 1 characterized in that mixtures of the dye solutions according to Claim 1 be used in optically pumped dye laser systems with high repetition frequencies.
DE2431966A 1974-07-03 1974-07-03 Poly-methine salt in dimethyl sulphoxide as dye laser medium - for high pulse frequency, infra-red-emitting, optically pumped systems Pending DE2431966A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2431966A DE2431966A1 (en) 1974-07-03 1974-07-03 Poly-methine salt in dimethyl sulphoxide as dye laser medium - for high pulse frequency, infra-red-emitting, optically pumped systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2431966A DE2431966A1 (en) 1974-07-03 1974-07-03 Poly-methine salt in dimethyl sulphoxide as dye laser medium - for high pulse frequency, infra-red-emitting, optically pumped systems

Publications (1)

Publication Number Publication Date
DE2431966A1 true DE2431966A1 (en) 1976-01-22

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533302B1 (en) * 1991-09-20 1996-11-20 Li-Cor, Inc. Sequencing near infrared and infrared fluorescence labeled DNA for detecting using laser diodes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533302B1 (en) * 1991-09-20 1996-11-20 Li-Cor, Inc. Sequencing near infrared and infrared fluorescence labeled DNA for detecting using laser diodes

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