Tunable Terahertz-wave generation from DAST crystal pumped by a monolithic dual-wavelength fiber laser

Ming Tang, Hiroaki Minamide, Yuye Wang, Takashi Notake, Seigo Ohno, Hiromasa Ito

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

For developing a continuous-wave (CW) tunable Terahertz-wave (THz-wave) source using difference-frequency generation (DFG) in highly nonlinear optical crystals, we proposed and demonstrated a dual-wavelength fiber ring laser system operating around 1060 nm based on wideband chirped fiber Bragg gratings (CFBGs) and semiconductor optical amplifier (SOA). Thermo-induced phase shift along the CFBG produces a very sharp transmission spike therefore two lasing wavelengths with single longitudinal mode operation are oscillating simultaneously within the fiber ring cavity. Due to the inhomogeneous gain broadening property of SOA, the wavelength spacing of our dual-wavelength fiber laser can be continuously adjusted from 0.3 to 9.5 nm. By using this single emitter dual-wavelength fiber laser to pump an organic nonlinear DAST crystal, type-0 collinear phase matching of DFG process can be fulfilled and monochromatic THz wave ranging from 0.5 to 2 THz has been successfully generated.

Original languageEnglish
Pages (from-to)779-786
Number of pages8
JournalOptics Express
Volume19
Issue number2
DOIs
Publication statusPublished - 2011 Jan 17

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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