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Experimental study on frequency doubling of Q-switched partially coherent laser

Abstract

In this paper, we investigate the frequency doubling of Q-switched partially coherent laser pulses. Such laser pulses are generated using a neodymium-doped yttrium aluminum garnet laser in which the laser cavity is a degenerate resonator. Electro-optic Q-switching is employed to generate laser pulses with a pulse width of approximately 10 ns. The spatial coherence of the output laser can be modulated by changing the size of a spatial filter within the laser cavity. The influence of spatial coherence on the conversion efficiency of the frequency doubling is studied. It is found that reducing the spatial coherence results in a slight reduction of the frequency-doubling conversion efficiency. However even in the case of low spatial coherence, the frequency-doubling conversion efficiency remains high, larger than 30%. The partially coherent laser beams with high frequency-doubling conversion efficiency can be applied to laser imaging, laser illumination, and inertial confinement fusion (ICF), etc.

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References

  1. Knitter, S., Liu, C.G., Redding, B.: Coherence switching of a degenerate VECSEL for multimodality imaging. Optica 3(4), 403–406 (2016)

    ADS  Article  Google Scholar 

  2. Goodman, J.W.: Speckle phenomena in optics: theory and application. Roberts and Company Publishers, Arapahoe County, Colorado, United States (2006)

    Google Scholar 

  3. Wolf, E.: Introduction to the theory of coherence and polarization of light. Cambridge University Press, Cambridge (2007)

    MATH  Google Scholar 

  4. Chen, H., Ji, X., Wang, Y., Chen, Z., Sasaki, O., Pu, J.: Investigation on Intracavity SHG With Controllable Coherence in a Degenerate Laser. IEEE J Quantum Elect 56(1), 1–6 (2020)

    Google Scholar 

  5. Cao, H., Chriki, R., Bittner, S.: Complex lasers with controllable coherence. Nat. Rev. Phys 1(2), 156–168 (2019)

    Article  Google Scholar 

  6. Pu, J., Korotkova, O., Wolf, E.: Invariance and noninvariance of the spectra of stochastic electromagnetic beams on propagation. Opt. Lett 31(14), 2097–2099 (2006)

    ADS  Article  Google Scholar 

  7. Garcia-Sucerquia, J., Ramírez, J.A.H., Prieto, D.V.: Reduction of speckle noise in digital holography by using digital image processing. Optik 116(1), 44–48 (2005)

    ADS  Article  Google Scholar 

  8. Rosen, J., Takeda, M.: Longitudinal spatial coherence applied for surface profilometry. Appl. Opt 39(23), 4107–4111 (2000)

    ADS  Article  Google Scholar 

  9. Wang, F., Cai, Y.: Experimental generation of a partially coherent flat-topped beam. Opt. Lett 33(16), 1795–1797 (2008)

    ADS  Article  Google Scholar 

  10. Cui, S., Chen, Z., Zhang, L., Pu, J.: Experimental generation of nonuniformly correlated partially coherent light beams. Opt. Lett 38(22), 4821–4824 (2013)

    ADS  Article  Google Scholar 

  11. Wang, L., Tschudi, T., Halldórsson, T., Pétursson, P.R.: Speckle reduction in laser projection systems by diffractive optical elements. Appl. Opt 37(10), 1770–1775 (1998)

    ADS  Article  Google Scholar 

  12. Wang, Y., Meng, P., Wang, D., Rong, L., Panezai, S.: Speckle noise suppression in digital holography by angular diversity with phase-only spatial light modulator. Opt. Express 21(17), 19568–19578 (2013)

    ADS  Article  Google Scholar 

  13. Redding, B., Choma, M.A., Cao, H.: Speckle-free laser imaging with random laser illumination. Opt. Photonics. News 23(12), 30 (2012)

    Article  Google Scholar 

  14. Harayama, T., Sunada, S., Shinohara, S.: Universal single-mode lasing in fully chaotic two-dimensional microcavity lasers under continuous-wave operation with large pumping power. Photonics. Res 5(06), 39–46 (2017)

    Article  Google Scholar 

  15. Chriki, R., Nixon, M., Pal, V., Tradonsky, C., Barach, G., Friesem, A.A., Davidson, N.: Manipulating the spatial coherence of a laser source. Opt. Express 23(10), 12989–12997 (2015)

    ADS  Article  Google Scholar 

  16. Chalopin, B., Chiummo, A., Fabre, C., Maître, A., Treps, N.: Fre-quency doubling of low power images using a self-imaging cavity. Opt. Express 18(8), 8033–8042 (2010)

    ADS  Article  Google Scholar 

  17. Mahler, S., Goh, M.L., Tradonsky, C.: Improved phase locking of laser arrays with nonlinear coupling. Phys. Rev. Lett 124(13), 133901–133905 (2020)

    ADS  Article  Google Scholar 

  18. Chriki, R., Barach, G., Tradosnky, C.: Rapid and efficient formation of propagation invariant shaped laser beams. Opt. Express 26(4), 4431–4439 (2018)

    ADS  Article  Google Scholar 

  19. Nixon, M., Redding, B., Friesem, A.A., Cao, H., Davidson, N.: Efficient method for controlling the spatial coherence of a laser. Opt. Letters 38(19), 3858–3861 (2013)

    ADS  Article  Google Scholar 

  20. Liew, S.F., Knitter, S., Weiler, S., Fernando, J., Ramme, M., Redding, B., Choma, M.A., Cao, H.: Intracavity frequency-doubled degenerate laser. Opt. Letters 42(3), 411–414 (2017)

    ADS  Article  Google Scholar 

  21. Mciver, J.K., Zubairy, M.S.: Second-harmonic generation by a partially coherent beam. Phys. Rev. A 36(1), 202–206 (1987)

    ADS  Article  Google Scholar 

  22. Zhang, B., Nan, D., He, J., Liu, S., Yang, J., Huang, H.: 355-nm UV generation by intracavity frequency tripled passively-switched Nd:YAG/Cr :YAG laser. IEEE. Photonic. Tech. L 23(10), 612–614 (2011)

    ADS  Article  Google Scholar 

  23. Stangner, T., Zhang, H., Dahlberg, T., et al.: Step-by-step guide to reduce spatial coherence of laser light using a rotating ground glass diffuser. Appl. Opt. 56(19), 5427–5434 (2017)

    ADS  Article  Google Scholar 

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Funding

This work was support by Dongguan Introduction Program of Leading Innovative and Entrepreneurial Talents (China).

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Correspondence to Jixiong Pu.

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Wang, K., Wang, Y., Zhang, G. et al. Experimental study on frequency doubling of Q-switched partially coherent laser. Opt Rev 29, 172–177 (2022). https://doi.org/10.1007/s10043-022-00731-6

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  • DOI: https://doi.org/10.1007/s10043-022-00731-6

Keywords

  • Partially coherent laser
  • Q-switched
  • Frequency doubling
  • Degenerate resonator