2D Saturable Absorbers for Fibre Lasers

Selkirk

et al. 2017

Chemistry A European J

Nanocomposites of layered MoS and multi-walled carbon nanotubes (CNTs) with core-shell structure were prepared by a simple solvothermal method. The formation of MoS nanosheets on the surface of coaxial CNTs has been confirmed by scanning electron microscopy, transmission electron microscopy, absorption spectrum, Raman spectroscopy, and X-ray photoelectron spectroscopy. Enhanced third-order nonlinear optical performances were observed for both femtosecond and nanosecond laser pulses over a broad wavelength range from the visible to the near infrared, compared to those of MoS and CNTs alone. The enhancement can be ascribed to the strong coupling effect and the photoinduced charge transfer between MoS and CNTs. This work affords an efficient way to fabricate novel CNTs based nanocomposites for enhanced nonlinear light-matter interaction. The versatile nonlinear properties imply a huge potential of the nanocomposites in the development of nanophotonic devices, such as mode-lockers, optical limiters, or optical switches.

Section: Introductionmentioning

confidence: 99%

MoS₂/Carbon Nanotube Core–Shell Nanocomposites for Enhanced Nonlinear Optical Performance

Selkirk

et al. 2017

Chemistry A European J

IOP Conf. Ser.: Mater. Sci. Eng.

“…A few years later, the Q-switched laser was discovered by using colored glass filter and dyes onto ruby laser configuration [1]. Since then, the materials used has evolved from semiconductor saturable absorber mirror (SESAM) to nanomaterials such as quantum dots, carbon nanotubes, graphene, transition metal dichalcogenides (TMDs), black phosphorous (BP) and topological insulators (TIs) [2]. Topological insulators in bulk state have an insulating energy gaps whether in two or three dimensions but the sample boundary were protected by time-reversal symmetry at the surface state or gapless edge [3].…”

Section: Introductionmentioning

confidence: 99%

Bismuth (III) Telluride (Bi₂Te₃) Based Topological Insulator Embedded in PVA as Passive Saturable Absorber in Erbium-Doped Fiber Laser

Apandi

Ahmad

Ambran

et al. 2017

View the article online for updates and enhancements. Related contentMode-locked Erbium-doped fiber laser generation using hybrid ZnO/GO saturable absorber H. Hassan, M. M. Ariannejad, R. Safaei et al.-A passively mode locked thulium doped fiber laser using bismuth telluride deposited multimode interference M Jung, J Lee, W Song et al. -Harmonically mode-locked Er-doped fiber laser based on a Sb2Te3 topological insulator saturable absorber J Sotor, G Sobon, W Macherzynski et al. Abstract. We demonstrate a passive Q-switched by integrating a Bismuth (III) Telluride (Bi2Te3) dispersed in Polyvinyl Alcohol (PVA) as passive saturable absorber. The experimental works show that the proposed passive saturable absorber operated at input power ranging from 21.69 mW to 126.89 mW with central operating wavelength of 1531 nm. We observe the tunable repetition rate from 40 kHz to 166 kHz with the shortest pulse width of 1.32 μs. The laser produced maximum instantaneous output peak power and pulse energy of 1.62 mW and 11.2 nJ, respectively. The signal to noise ratio was measured at 49 dB which indicates the stability of the generated pulse.

“…Several advantages exit in performing I-scan over the Z-scan technique, such as fully ber-integrated setup or thin-enough sample. 19 We measured the nonlinear optical absorption of microber by I-scan technique rstly, as described in Fig. 2.…”

Section: Preparation and Characterization Of Microfibersmentioning

confidence: 99%

Optical modulation of microfibers and application to ultrafast fiber lasers

Zhao

et al. 2018

RSC Adv.

Microfibers with different waist diameters were prepared successfully by a flame-brushing technique. Their saturable absorption properties were investigated. The non-saturable loss and modulation depth both decreased with the increase of the diameter. According to the mode distribution of microfibers with a waist diameter of 25 mm, it could be supposed that the evanescent field effect may be useful for microfibers being saturable absorbers (SAs). Based on the 25 mm-diameter microfiber, an all-fiberstructure mode-locked fiber laser was achieved successfully with long term stability in the span of a week. The results indicated that microfibers with suitable diameters were excellent SAs. To the best of our knowledge, this is first report on the usage of microfibers as a SA for building ultrafast fiber lasers.