High-Repetition-Rate Terahertz Generation in QPM GaAs With a Compact Efficient 2-μm KTP OPO

Jialin Mei, Kai Zhong, Maorong Wang, Pengxiang Liu, Degang Xu, Yuye Wang, Wei Shi, Jianquan Yao, Robert A Norwood, Nasser N Peyghambarian

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

An efficient tunable high-repetition-rate KTiOPO4 (KTP) optical parametric oscillator (OPO) was deployed as a compact terahertz (THz) source for the first time. The KTP OPO was intracavity pumped by an acousto-optical Q-switched Nd:YVO4 laser and emitted two tunable wavelengths near degeneracy. The OPO tuning range extended continuously from 2.068 to 2.191 μm with a maximum output power of 3.29 W at 24 kHz, corresponding to an optical-optical conversion efficiency of 20.69%, believed to be among the highest reported. A periodically inverted quasi-phase-matched GaAs crystal was used to generate the THz wave by the difference frequency generation (DFG) method based on a dual-wavelength laser. The maximum output THz power was 0.6 μW at 1.244 THz, and the DFG energy conversion efficiency was 4.32 × 10-7. This provides a potential practical palm-top tunable THz sources for portable applications.

Original languageEnglish (US)
Article number7457629
Pages (from-to)1501-1504
Number of pages4
JournalIEEE Photonics Technology Letters
Volume28
Issue number14
DOIs
StatePublished - Jul 15 2016

Fingerprint

Optical parametric oscillators
parametric amplifiers
repetition
Conversion efficiency
Terahertz waves
Wavelength
Lasers
energy conversion efficiency
output
Energy conversion
wavelengths
lasers
Tuning
tuning
Crystals
crystals
potassium titanylphosphate
gallium arsenide

Keywords

  • difference frequency generation (DFG)
  • gallium arsenide (GaAs)
  • gallium arsenide (GaAs)
  • optical parametric oscillator (OPO)
  • quasi-phase-matching (QPM)
  • terahertz (THz)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

Cite this

High-Repetition-Rate Terahertz Generation in QPM GaAs With a Compact Efficient 2-μm KTP OPO. / Mei, Jialin; Zhong, Kai; Wang, Maorong; Liu, Pengxiang; Xu, Degang; Wang, Yuye; Shi, Wei; Yao, Jianquan; Norwood, Robert A; Peyghambarian, Nasser N.

In: IEEE Photonics Technology Letters, Vol. 28, No. 14, 7457629, 15.07.2016, p. 1501-1504.

Research output: Contribution to journalArticle

Mei, Jialin ; Zhong, Kai ; Wang, Maorong ; Liu, Pengxiang ; Xu, Degang ; Wang, Yuye ; Shi, Wei ; Yao, Jianquan ; Norwood, Robert A ; Peyghambarian, Nasser N. / High-Repetition-Rate Terahertz Generation in QPM GaAs With a Compact Efficient 2-μm KTP OPO. In: IEEE Photonics Technology Letters. 2016 ; Vol. 28, No. 14. pp. 1501-1504.
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