Abstract
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 language | English |
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Article number | 151118 |
Journal | Applied Physics Letters |
Volume | 103 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2013 Oct 7 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)