Passively Q-switched Ytterbium-doped fiber laser based on broadband multilayer Platinum Ditelluride (PtTe2) saturable absorber

Abstract

Two-dimensional (2D) layered Platinum Ditelluride (PtTe 2 ), a novel candidate of group 10 transition-metal dichalcogenides (TMDs), which provides enormous potential for pulsed laser applications due to its highly stable and strong nonlinear optical absorption (NOA) properties. PtTe 2 saturable absorber (SA) is successfully fabricated with firstly demonstrated the passively Q-switched laser operation within a Yb-doped fiber laser cavity at 1066 nm. Few layered PtTe 2 is produced by uncomplicated and cost-efficient ultrasonic liquid exfoliation and follow by incorporating into polyvinyl alcohol (PVA) polymer to form a PtTe 2 -PVA composite thin film saturable absorber. The highest achieved single pulse energy is 74.0 nJ corresponding to pulse duration, repetition rate and average output power of 5.2 μs, 33.5 kHz and 2.48 mW, respectively. This work has further exploited the immeasurable utilization potential of the air stable and broadband group 10 TMDs for ultrafast photonic applications.

Solution-processed two-dimensional materials for ultrafast fiber lasers (invited)

“…Other solvents used for graphene were ortho-dichlorobenzene [168] and perfluorinated aromatic solvents [169]. Among the solvents used for fabricating SAs, NMP is the most popular [61, 67, 88, 103, 116, 117, 119-129, 144, 145], while other solvents used are DMF [85][86][87][88] and isopropyl alcohol (IPA) [42,89,104,[116][117][118]. While the main advantage of using solvents is the high purity of the final material, there are also several drawbacks.…”

“…While other solvents with lower boiling points have been proposed, like acetone, acetonitrile, 1-propanol, or IPA, their solubility parameters were not as good as those for NMP and DMF and their use was not as successful [170][171][172][173][174]. Despite this, there are a number of reports on SAs made from IPA-based 2DM solutions, particularly MoS 2 [89], PtTe [104], Bi 2 Se 3 [16,89,110,111,137,138], and BP [42,[116][117][118].…”

“…Panels A-D of Figure 4 show the spectra of MoS 2 , MoSe 2 , WS 2 , and WSe 2 , respectively. In fact, while several TMDs have been obtained by solution processing [135], researchers are devoting significant effort to explore such new TMDs for applications in ultrafast photonics [ [104]. A variety of TMD materials have been discovered, where MoS 2 and WS 2 are the most common SAs that were used to achieve ultrashort pulses.…”

Triple‐wavelength Q‐switched ytterbium‐doped fiber laser based on tungsten oxide as saturable absorber

“…Generation of Q‐switched laser requires a modulator to convert a continuous wave laser into pulses by modifying the intracavity losses. Generally, the modulation can be fulfilled passively or actively . Passive Q‐switching and mode‐locking can be realized using materials with saturable absorption capability such as graphene, carbon nanotube (CNT), metals nanostructures transition metal dichalcogenides (TMD) and transition metal oxides (TMO) .…”

Nonlinear photoresponse of metallic graphene-like VSe2 ultrathin nanosheets for pulse laser generation

“…Owing to its metallic property and high electrical conductivity (1000 Sm −1 ) [26,27], VSe 2 has been extensively investigated as an anode material for practical energy storage, such as potassium-ion and lithium-ion batteries [28][29][30], but has never been applied in the field of pulse fiber lasers. Compared to several other broadband saturable absorbers (SAs), such as MXene [31], PtTe 2 [32], and TiS 2 [33], VSe 2 possesses many advantages, including that the zero band gap makes VSe 2 have universal optical response, relatively large layer spacing of 6.1Å [25,34] and weak van der Waals interactions render it easy to be exfoliated from bulk crystals. It is expected that VSe 2 could be a promising broadband SA applied in pulsed laser field with these merits.…”