Abstract
We demonstrate passive mode locking of solid-state lasers by saturable absorbers based on carbon nanotubes (CNT). These novel absorbers are fabricated by spin-coating a polymer doped with CNTs onto commercial dielectric laser-mirrors. We obtain broadband artificial saturable absorber mirrors with ultrafast recovery times without the use of epitaxial growth techniques and the well-established spin-coating process allows the fabrication of devices based on a large variety of substrate materials. First results on passive mode locking of Nd:glass and Er/Yb:glass lasers are discussed. In the case of Er/Yb:glass we report the to our knowledge shortest pulse generated in a self-starting configuration based on Er/Yb:bulk-glass: 68 fs (45 fs Fourier-limit) at 1570 nm wavelength at a pulse-repetition rate of 85 MHz.
Highlights
Just a few years after the first demonstration of lasing action in a rod of ruby it was realized, that lasers could generate pulses much shorter than the round-trip time of the laser cavity when a specific dye was brought into the laser resonator
We demonstrate passive mode locking of solid-state lasers by saturable absorbers based on carbon nanotubes (CNT)
These novel absorbers are fabricated by spin-coating a polymer doped with CNTs onto commercial dielectric laser-mirrors
Summary
Avouris (Springer-Verlag, Berlin, 2001) Topics in Appl. C. Kimerling, “220-fs erbium-ytterbium:glass laser mode locked by a broadband low-loss silicon/germanium saturable absorber,” Opt. Lett.
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