visible

The Northern Lights will be visible in fewer states than originally anticipated. Will you still be able to see them?

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The Northern Lights are expected to be seen in a handful of states on Wednesday, July 12 and Thursday, July 13, but in fewer places than in originally intended. The aurora borealis these days will be “active,” according to the Geophysical Institute at the University of Alaska, which initially expected activity to be high. Weather … Read more

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