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This is the final published version. It first appeared at http://pubs.acs.org/doi/abs/10.1021/nn500767b. ; We demonstrate wide-band ultrafast optical pulse generation at 1, 1.5, and 2 μm using a single-polymer composite saturable absorber based on double-wall carbon nanotubes (DWNTs). The freestanding optical quality polymer composite is prepared from nanotubes dispersed in water with poly(vinyl alcohol) as the host matrix. The composite is then integrated into ytterbium-, erbium-, and thulium-doped fiber laser cavities. Using this single DWNT-polymer composite, we achieve 4.85 ps, 532 fs, and 1.6 ps mode-locked pulses at 1066, 1559, and 1883 nm, respectively, highlighting the potential of DWNTs for wide-band ultrafast photonics. ; We acknowledge funding from EPSRC GR/ S97613/01, EP/E500935/1, the ERC Grant NANOPOTS, a Royal Society Brian Mercer Award for Innovation. A.C.F. is a Royal Society Wolfson Research Merit Award holder. V.N. wishes to acknowledge support from the European Research Council (ERC Starting Grant 2DNanoCaps) and Science Foundation Ireland, P.T. from National Natural Science Foundation of China, Grants No. 11225421, F.B. from the Newton International Fellowship, Z.S. from Teknologiateollisuus TT-100, the European Union's Seventh Framework Programme (No. 631610), and Aalto University, T.H. from NSFC (Grant No. 61150110487), and the Royal Academy of Engineering (Graphlex).

" Introduction: Gastric mesenchymal tumors are a pathology that is increasing in incidence in recent years but the treatment is not yet standardized. The laparoscopic approach to these lesions is a modern option, with the patient benefiting from the advantages of minimally invasive surgery. Methods: We included in the study 4 patients operated laparoscopically for suspicion of gastric GISTs between Mars 2019 and May 2022. From a prospectively kept database, we extracted the following characteristics: age, sex, length of postoperative hospital admission, operation time, tumor location, tumor size, histopathological assessment of resection margins, intraoperative blood loss, and incidence of postoperative complications. Results: Average tumor size was 4.3 cm, ranging from 4 to 6 cm. Laparoscopic wedge resection was possible in all cases. There was no conversion, no episode of tumor rupture or spillage, and no major intraoperative complications. Histology confirmed a GIST in 3 of 4 cases. In one case histological workup showed gastric schwannoma. Conclusion: Laparoscopic wedge resection for gastric stromal tumors, even larger than 5 cm, appears to be safe and feasible in selected patients, with acceptable operative time and oncological outcome after an intermediate follow-up. More important than the size of tumors that are approached laparoscopically is their location and the possibility of a stenosis-free resection."