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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/055/03/0405-0412

    • Keywords

       

      Nonlinear optical material; third harmonic generation; AgGaSe2 crystal

    • Abstract

       

      Generation of third harmonic of CO2 laser radiation has been obtained in a type-II, ϑ=57° cut 9 mm thick AgGaSe2 crystal for the first time by sum-frequency-mixing of the fundamental with its second harmonic, the latter being obtained using another type-I, ϑ=55° cut 11 mm thick AgGaSe2 crystal. The energy conversion efficiencies obtained for second harmonic and third harmonic generations are 6.3% and 2.4% respectively with the input fundamental pump power density of 5.9 MW/cm2 only. The wavelength of the fundamental CO2 laser radiation used for the generation of harmonics is 10.6 µm, P(20) line. A compact TEA CO2 laser source has been built in the laboratory.

    • Author Affiliations

       

      Gopal C Bhar1 Pathik Kumbhakar1 2 D V Satyanarayana3 N S N Banerjee3 U Nundy3 C G Chao4

      1. Laser Laboratory, Physics Department, Burdwan University, Burdwan - 713 104, India
      2. Physics Department, Regional Engineering College, Durgapur - 713 209, India
      3. Centre for Advanced Technology, Indore - 452 013, India
      4. Anhui Institute of Optics and Fine Mechanics, China

    • Dates

       
      Published
      September 2000
      Manuscript received
      10 February 2000
      Manuscript revised
      29 June 2000

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