Abstract
Femtosecond mid-infrared laser pulses that are continuously tunable in the wavelength range from 9 to 18 μm are demonstrated. These nearly bandwidth-limited pulses are generated by phase-matched difference-frequency mixing within the broad spectrum of 20-fs pulses from a mode-locked Ti:sapphire laser in GaSe. A direct determination of the pulse duration at 11.5 μm gives a value of 140 fs. The average mid-infrared power of 1 μW is ∼100 times greater than that for infrared generation by non-phase-matched optical rectification.
Original language | English (US) |
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Pages (from-to) | 861-863 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 23 |
Issue number | 11 |
DOIs | |
State | Published - Jun 1 1998 |
Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics