High performance terahertz quantum cascade laser sources based on intracavity difference frequency generation

Q. Y. Lu, N. Bandyopadhyay, S. Slivken, Y. Bai, M. Razeghi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

We demonstrate high power, room temperature, single-mode THz emissions based on intracavity difference frequency generation from mid-infrared quantum cascade lasers. Dual active regions both featuring giant nonlinear susceptibilities are used to enhance the THz power and conversion efficiency. The THz frequency is lithographically tuned by integrated dual-period distributed feedback gratings with different grating periods. Single mode emissions from 3.3 to 4.6 THz with side-mode suppression ratio and output power up to 40 dB and 65 W are obtained, with a narrow linewidth of 5 GHz.

Original languageEnglish (US)
Pages (from-to)968-973
Number of pages6
JournalOptics Express
Volume21
Issue number1
DOIs
StatePublished - Jan 14 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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