title: Enhanced terahertz source based on external cavity difference-frequency generation using monolithic single-frequency pulsed fiber lasers.
abstract: We demonstrate a resonant external cavity approach to enhance narrowband terahertz radiation through difference-frequency generation for the first time (to our knowledge). Two nanosecond laser pulses resonant in an optical cavity interact with a nonlinear crystal to produce a factor of 7 enhancement of terahertz power compared to a single-pass orientation. This external enhancement approach shows promise to significantly increase both terahertz power and conversion efficiency through optical pump pulse enhancement and effective recycling.
authors.affiliation: NP Photonics, Incorporated, 9030 South Rita Road, Tucson, Arizona 85747, USA. epetersen@npphotonics.com
authors.forename: Eliot B
authors.initials: EB
authors.lastname: Petersen
authors.forename: Wei
authors.initials: W
authors.lastname: Shi
authors.forename: Dan T
authors.initials: DT
authors.lastname: Nguyen
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Yao
authors.forename: Jie
authors.initials: J
authors.lastname: Zong
authors.forename: Arturo
authors.initials: A
authors.lastname: Chavez-Pirson
authors.forename: N
authors.initials: N
authors.lastname: Peyghambarian