Tunable 3-6 THz polariton laser exceeding 0.1 mW average output power based on crystalline RbTiOPO4

Tiago Almeida Ortega, Helen M. Pask, David J. Spence, Andrew J. Lee

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We report a diode-pumped, intracavity THz laser source based on stimulated polariton scattering in crystalline RbTiOPO4 using a surface-emitting configuration. The system was continuously tunable in four regions, from 3.05 - 3.16 THz, from 3.50 - 4.25 THz, from 4.57 - 4.75 THz and from 5.40 - 5.98 THz. The laser delivered 124.7 μW average output power at 4.10 THz for only 6.0 W diode pump power at 808 nm, corresponding to a diode-to-THz conversion efficiency of 2.1x10-5. The horizontal and vertical beam quality parameters were M2H < 1.6 and M2V < 1.1 and the linewidth of the terahertz field was 28 GHz at 4.10 THz. The results demonstrate that the surface-emitting configuration is a very efficient technique to produce high power THz laser sources with frequency-tunable output suitable for real world applications.

Original languageEnglish
Article number5100806
Pages (from-to)1-6
Number of pages6
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number5
Publication statusPublished - 1 Sept 2018


  • crystals
  • laser excitation
  • nonlinear optics
  • parametric devices
  • power generation
  • power lasers
  • Raman scattering
  • resonators
  • solid-state lasers
  • stimulated polariton scattering (SPS)
  • surface emitting lasers
  • terahertz lasers


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