Dyestuff laser

• US 4,072,911 A
• Filed: 05/01/1975
• Issued: 02/07/1978
• Est. Priority Date: 05/04/1974
• Status: Expired due to Term

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: Hartig, Wolfgang, Raue, Roderich, Friedrich, Adolf, Walther, Herbert
• Primary Examiner(s): Edmundson, F.C.
• Application Number:
  US05/573,785
• Time in Patent Office: 1,013 Days
• Field of Search: 252/301.17, 331/94.5 L
• US Class Current: 372/53
• CPC Class Codes: H01S 3/213 including an organic dye

Abstract

A dyestuff laser which consists of a reservoir for the dyestuff solution and an energy source, coupled thereto, which is capable of exciting the dyestuff solution to produce an emission, the radiation generated lying in the wavelength range of 550 to 680 nm. The dyestuff is a sulforhodamine.

Claims

1. Dyestuff laser capable of generating a coherent emission in a wavelength range of 550 to 680 nm consisting of a reservoir containing a laser dyestuff solution and a pumping light source coupled thereto capable of exciting the dyestuff solution so that it emits, in which said dyestuff solution comprises a solvent which does not interfere with the emission and a concentration sufficient to emit laser beams of a dyestuff of the formula ##STR14## wherein:

R₈ and R₁₀ are alkyl of 1-4 C atoms;

R₁₂ and R₁₃ are hydrogen or alkyl of 1-4 C atoms; and

Me is hydrogen, potassium, sodium, ammonium monoalkylammonium, dialkylammonium or trialkylammonium ions, said alkyl containing 1-4 C atoms.

2. Dyestuff laser of claim 1 in which said dyestuff has the formula ##STR15##

3. Process for generating a laser emission in a wavelength range of 550 to 680 nm using a dyestuff laser consisting of a reservoir containing a laser dyestuff solution and a pumping light source coupled thereto capable of exciting the dyestuff solution so that it emits, in which said dyestuff solution comprises a solvent which does not interfere with the emission and a concentration sufficient to emit laser beams of a dyestuff of the formula ##STR16## wherein R₈ and R₁₀ are alkyl of 1-4 C atoms;

R₁₂ and R₁₃ are hydrogen or alkyl of 1-4 C atoms; and

Me is hydrogen, potassium, sodium, ammonium monoalkylammonium, dialkylammonium or trialkylammonium ions, said alkyl containing 1-4 C atoms.

4. Process of claim 3 in which said dyestuff has the formula ##STR17##