NLOQO Home · Issue Contents · Forthcoming Papers
Domain Wall Dark Pulses in Mode-locked Fiber Laser with Bi2Te3 Thin Film Absorber
Mahmoud M. Ahmeed, Latifah Sarah Supian, Nurul Izzah S. Wadi, Anas Abdul Latiff and Muhammad Imran M. A. Khudus
The experimental demonstration of domain-wall dark pulses in an extended cavity mode-locked Erbium-doped fiber laser is presented, employing a Bi2Te3 saturable absorber (SA). Through the incorporation of Bi2Te3 powder into a polyvinyl film, we successfully developed a Bi2Te3 SA with a notable modulation depth of 12.6%. Integrated into a ring EDFL, the Bi2Te3-SA enabled the generation of mode-locked domain-wall dark pulses, exhibiting dual-wavelength emission, capitalizing on its saturable absorbing capability alongside the inherent nonlinear properties of the Bi2Te3 thin film and the extended single-mode fiber spool. The domain-wall dark pulse initiated spontaneously at a pump power of 41.3 mW, emitting at wavelengths of 1562.8 nm and 1564.2 nm. Notably, the dark pulse repetition rate measured at 1.81 MHz, accompanied by a pulse duration of 180 ns and the highest average pulse energy recorded at 1.95 nJ. These results underscore the promising potential of Bi2Te3 as an advanced material for application in pulsed laser systems, particularly due to its exceptional nonlinear properties, positioning it as a fascinating candidate for further advancements in pulsed laser technology.
Keywords: Dark pulsed laser, domain-wall dark pulse, mode-locking, topological insulator