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Graphene mode-locked femtosecond Crsup2+/sup:ZnS laser with ~300 nm tuning range
- Source :
- Optics express. 24(18)
- Publication Year :
- 2016
-
Abstract
- Graphene has proved to be an excellent broadband saturable absorber for mode-locked operation of ultrafast lasers. However, for the mid-infrared (mid-IR) range where broadly tunable sources are in great needs, graphene-based broadly tunable ultrafast mid-IR lasers have not been demonstrated so far. Here, we report on passive mode-locking of a mid-IR Cr:ZnS laser by utilizing a transmission-type monolayer graphene saturable absorber and broad spectral tunability between 2120 nm and 2408 nm, which is the broadest tuning bandwidth ever reported for graphene mode-locked mid-IR solid-state lasers. The recovery time of the saturable absorber is measured to be ~2.4 ps by pump-probe technique at a wavelength of 2350 nm. Stably mode-locked Cr:ZnS laser delivers Fourier transform-limited 220-fs pulses with a pulse energy of up to 7.8 nJ.
- Subjects :
- Optical amplifier
Materials science
Graphene
business.industry
Saturable absorption
02 engineering and technology
021001 nanoscience & nanotechnology
Laser
01 natural sciences
Atomic and Molecular Physics, and Optics
law.invention
010309 optics
Optics
Mode-locking
law
0103 physical sciences
Femtosecond
Optoelectronics
0210 nano-technology
business
Ultrashort pulse
Tunable laser
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 24
- Issue :
- 18
- Database :
- OpenAIRE
- Journal :
- Optics express
- Accession number :
- edsair.doi.dedup.....e28ab3a644c38e5515b3d0a34c87b8f3