fiber

Researchers demonstrate first femtosecond fiber laser with visible wavelength

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Researchers demonstrate first femtosecond fiber laser with visible wavelength

Experimental setup of the fiber laser. BD, beam dump; DM, dichroic mirror; ISO/POL, polarizing optical isolator; L, lens; M, mirror; PBS, polarizing beam splitter; TG, transmission grating; /2, half wave plate; /4, quarter wave plate. Credit: Optics letters (2023). DOI: 10.1364/OL.492671 Researchers have developed the first fiber laser capable of producing femtosecond pulses in the … Read more

Carbon fiber conundrum: Physicist explains tragic implosion of OceanGates’ Titan submersible

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Illustration of carbon fiber breakage

The OceanGate Titan submersible, the first deep-sea vehicle with a hull composed primarily of carbon fibers, recently exploded in the Atlantic Ocean, killing five crew members. Experts, including Arun Bansil, a distinguished physics professor at Northeastern, are investigating the possibility that the vessel’s experimental carbon-fiber hull, built in just six weeks, may have been a … Read more