Despite recent progress in this field, it remains challenging to obtain OFCs with a flat-top spectrum and a high conversion efficiency in an optical cavity with anomalous GVD. In this paper, ...

Ira Block/National Geographic Image Collection From the flat top of the colossal Monks Mound ... have been caused by cutting down thousands of trees to build stockades and other improvements.

Abstract: A frequency-tunable microwave photonic filter (MPF) with a narrow and flat-top passband implemented using a phase modulator (PM) and a superstructured fiber Bragg grating (SFBG) is proposed ...

This type of garden lighting is the underrated key to a beautiful and functional outdoor space, this is our favorite way to ...

“Seeing the trees die, it’s like losing one of your babies,” said Keybani, whose family runs a nursery dedicated to preserving the species. Known for their mushroom-shaped canopies and the ...