Generation of High Power 1.54 Micrometers Radiation by Stimulated Raman Scattering in Methane (Opwekking van Hoogvermogen 1.54 Micrometers Straling m.b. v. Gestimuleerde Raman Verstrooiing in Methaan)
Abstract
We report about experiments with a Nd:YAG laser operating at 1.064 microns which are carried out to obtain an efficient source of eye-safe 1.54 microns radiation. This conversion is obtained by Stimulated Raman Scattering in methane by applying focussing and a dichroic mirror for feedback. The varied parameters are laser power, pulse repetition rate, gas pressure, gas constitution, beam width and the optical strength of the lenses. With a spherical lens we obtained 61% conversion efficiency with an input of 22 mJ. For a combination of two cylindrical lenses of 100 mm focal length and 200 mJ input a value of 74% is found. At pulse repetition frequencies higher than 5 Hz a degradation of the output takes place. Keywords: Lasers, German language.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1990
- Accession Number
- ADA227928
Entities
People
- Ing. F. Van Putten
Organizations
- Netherlands Organisation for Applied Scientific Research