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Coherent Raman scattering (CRS) [1] is a nonlinear microscopy technique, which can enhance the Raman intensity by orders of magnitude compared to conventional spontaneous Raman measurements, ultimately reaching video-rate imaging speeds [1]. However, it comes at the cost of an increased experimental complexity. In particular, it requires synchronized ultra-fast lasers, where two ps pulses (pump and...
A mode-locked Raman laser, using 25 m of a GeO2 doped fiber as the gain medium, is reported employing carbon nanotubes. The oscillator generates 850 ps chirped pulses, which are externally compressed to 185 ps.
We report an ultrafast fiber laser based on carbon nanotube saturable absorber. 84 fs pulses are generated directly from the fiber oscillator with 61.2 nm spectral width.
We mode-lock a fiber oscillator with cavity length of ~1500m using nanotubes, achieving 1.55ps pulses with pulse energy up to 63nJ at 134KHz repetition rate.
A Graphene-based saturable absorber is fabricated using wet chemistry techniques. We use it to passively mode-lock an Erbium doped fiber laser. ∼500fs pulses are produced at 1560nm with a 5.2nm spectrum bandwidth.
Dynamic nonlinear absorption of composite-type single-wall carbon nanotube saturable absorbers is characterized using both femtosecond and picosecond pump pulses. Results are compared with numerical simulations based on two commonly used saturable absorber models.
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