Transparent Nanopaper for Ultrashort Pulse Generation in the Near-Infrared Region

Abstract

Transparent nanopaper (T-paper)can be applied in the field of electromagnetic shielding materials, antistatic materials, composite conductive materials, electric pool materials, super capacitors and thermal management systems, etc. However, this kind of transparent nanopaper hasn’t been employed in the ultrafast photonics yet. For the first time, transparent electrical nanopaper is used in fiber lasers Different from the conventional pulsed fiber laser, which operates in Q-switched regime under a low pump power and then in mode-locked regime under a high pump power. Mode-locking is achieved at first with pulse duration of 550 fs under a low pump power (166 mW). When further increasing the pump power up to 198 mW, the proposed fiber laser can be converted from mode-locked to Q-switched state, which is the result of the two-photon absorption effect. The proposed fiber laser based on transparent nanopaper can be potentially applied in the optical tomography, metrology, spectroscopy, micro-machining technology and biomedical diagnostics, etc

Keywords: Er-doped fiber laser, Transparent nanopape, Saturable absorbers, Femtosecond Q-switched.