Fiber-based pulse stretcher for narrowband terahertz pulse generation with a chirped-pulse beating method

Tetsuya Yoshida, Shohei Kamada, Shuhei Murata, Takao Aoki

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We theoretically show that it is possible to generate chirp-free terahertz (THz) pulses with a chirped-pulse beating method by using an optical fiber as a pulse stretcher. Proper choices of the core radius and the dopant fraction of the core material of a step-index single-mode optical fiber eliminate the third-order spectral phase of the fiber, thus giving the pump laser pulse a purely linear chirp. We also show that even a standard commercial single-mode optical fiber can give THz pulses of lower chirp than the lower limit for a grating pair. We perform experiments to verify our theory.

Original languageEnglish
Article number151118
JournalApplied Physics Letters
Issue number15
Publication statusPublished - 2013 Oct 7


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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