, Volume 63, Issue 5, pp 1003–1010 | Cite as

Diode array pumped, non-linear mirror Q-switched and mode-locked Nd : YVO4 laser — a good tool for powder SHG measurement

  • P. K. Datta
  • Chandrajit Basu
  • S. Mukhopadhyay
  • S. K. Das
  • G. K. Samanta
  • Antonio Agnesi


A non-linear mirror consisting of a lithium triborate crystal and a dichroic output coupler are used to mode-lock (passively) an Nd : YVO4 laser, pumped by a diode laser array. The laser can operate both in cw mode-locked and simultaneously Q-switched and mode-locked (QML) regime. The peak power of the laser while operating in QML regime is much higher but pulses suffers from poor amplitude stability. The incorporation of an acousto-optic modulator as an active Q-switch enhances the stability of the QML pulse envelope. The second-order non-linearity of powdered crystalline urea is conclusively measured with respect to KDP while the laser is operating in passively Q-switched and passively mode-locked regime as well as in actively Q-switched and passively mode-locked regime.


Non-linear mirror mode-locking Q-switching powder SHG 


42.55.Xi 42.65.Re 42.60.Fc 42.60.Gd 


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Copyright information

© Indian Academy of Sciences 2004

Authors and Affiliations

  • P. K. Datta
    • 1
  • Chandrajit Basu
    • 1
  • S. Mukhopadhyay
    • 1
  • S. K. Das
    • 1
  • G. K. Samanta
    • 1
  • Antonio Agnesi
    • 2
  1. 1.Department of Physics and MeteorologyIndian Institute of TechnologyKharagpurIndia
  2. 2.Department of ElectronicsUniversity of PaviaPaviaItaly

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