Efficient parametric terahertz generation in quasi-phase-matched GaP through cavity enhanced difference-frequency generation

Eliot B. Petersen, Wei Shi, Arturo Chavez-Pirson, N. Peyghambarian, Adam T. Cooney

Research output: Contribution to journalArticle

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We report an efficient parametric terahertz (THz) source by using bonded quasi-phase-matched (QPM) GaP crystals pumped by the C-band pulsed fiber lasers in a master oscillator power amplifier configuration, based on difference frequency generation (DFG). We observed that the QPM-GaP crystals can effectively increase the THz generation power and efficiency by increasing the number of periods. Moreover, we observed external cavity enhanced THz DFG by placing the QPM-GaP crystal in an external ring cavity. The THz cavity enhancement factor of approximately 250 has been achieved in comparison with a single-pass THz DFG. The maximum THz average power can reach 339 μW, corresponding to a power conversion efficiency of 2.43× 10-4 and a quantum efficiency of 3.16%.

Original languageEnglish (US)
Article number121119
JournalApplied Physics Letters
Issue number12
StatePublished - Mar 21 2011


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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