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We report generation of broadband supercontinuum (SC) by noise-like pulses (NLPs) with a central wavelength of 1070 nm propagating through a long piece of standard single-mode fibers (~100 meters) in normal dispersion region far from the zero-dispersion point. Theoretical simulations indicate that the physical mechanism of SC generation is due to nonlinear effects in fibers. The cascaded Raman scattering is responsible for significant spectral broadening in the longer wavelength regions whereas the Kerr effect results in smoothing of SC generated spectrum. The SC exhibits low threshold (43 nJ) and a flat spectrum over 1050-1250 nm.
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http://dx.doi.org/10.1364/OE.21.016056 | DOI Listing |
We report a 1.7 µm all-fiber Tm-doped fiber (TDF) amplification system delivering nanosecond pulse with microjoule-level energy. The seed laser is a 1.
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February 2025
We report on the dynamical generation of pure-quartic noise-like pulses (NLPs) in an ultrafast fiber laser with a net anomalous fourth-order dispersion (FOD). The pure-quartic NLPs can be characterized by the appearance of spectral sidebands on the smooth broad spectra, which are different from conventional NLPs in a net second-order dispersion regime. Moreover, the spectral widths of pure-quartic NLPs are closely related to the intra-cavity net FOD value.
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September 2024
We report on the direct generation of 0.565 µJ, 80.7 kW noise-like pulse (NLP) from an all-fiber Mamyshev oscillator (MO) at 1550 nm wavelength experimentally.
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September 2024
The pursuit of an optimal mode-locker in nonlinear photonics is crucial for advancing high-performance laser technologies. Addressing the market demands and technical complexities in creating highly integrated and robust saturable absorbers, we present a femtosecond laser-inscribed in-fiber straight waveguide, seamlessly integrating a few-mode fiber segment into a single-mode fiber. This design reduces costs, simplifies fabrication, and enhances system integration and stability.
View Article and Find Full Text PDFJ Indian Soc Pedod Prev Dent
October 2024
Department of Paediatric and Preventive Dentistry, ACPM Dental College, Dhule, Maharashtra, India.
Background: Audio-analgesia is one of the unexplored aspects of behavior management in pediatric dentistry, and recently, there have been many new inclusions in shades of noise that were previously just limited to white noise, like brown noise and pink noise.
Aim: The aim of the study was to evaluate and compare the effectiveness of white noise, brown noise, and pink noise on dental anxiety in pediatric patients undergoing primary tooth extraction.
Study Settings And Design: Multiarm, triple-blinded, parallel-group randomized controlled trial.