In a groundbreaking study published in ‘Materials Research Express’, researchers have demonstrated the mode-locking capabilities of a thulium-holmium doped fiber laser (THDFL) using bismuth selenide (Bi2Se3) as a saturable absorber. This innovative approach could significantly impact various sectors, including construction, by enhancing precision and efficiency in laser applications.
The research, led by H Ahmad from the Photonics Research Centre at Universiti Malaya, highlights the use of an airbrush spraying technique to deposit Bi2Se3 onto two distinct fiber types: arc-shaped and side-polished fibers. The meticulous application method ensures a uniform coating, which is crucial for the effective performance of the saturable absorber. “This is the first time we have shown that Bi2Se3 can be effectively utilized in THDFLs,” Ahmad noted, underscoring the novelty of the work.
The findings reveal that the arc-shaped fiber host outperforms the side-polished fiber in producing shorter pulse widths, essential for applications requiring high precision. The arc-shaped fiber achieved a center wavelength of 1913.5 nm, a 3-dB bandwidth of 3.11 nm, and an optical pulse width of just 1.33 picoseconds. In contrast, the side-polished fiber generated a center wavelength of 1918.55 nm, with a pulse width of 1.43 picoseconds. This difference in performance could be pivotal for industries that rely on advanced laser technologies, particularly in medical applications such as tissue ablation.
The implications of this research extend to the construction sector as well. Laser systems are increasingly being integrated into construction processes for tasks like cutting, welding, and material inspection. The ability to produce shorter, more precise laser pulses can lead to enhanced accuracy and reduced material wastage. As Ahmad stated, “The advancements in laser technology can revolutionize how we approach tasks in various fields, including construction, by increasing efficiency and reducing costs.”
As the construction industry continues to evolve, the integration of advanced laser technologies like the THDFL could facilitate new methods of operation, ultimately leading to safer and more efficient building practices. The research not only paves the way for enhanced medical applications but also opens doors for innovation across multiple sectors where precision is paramount.
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