a The photonics geometry as part of the strontium clock, showing the four types of beams including a pair of the red and blue beams at 0° (light color) and 45° (dark color), as well as the collinearly combined lattice and clock beams (yellow). b Measured trajectories of the twelve blue and red MOT beams, overlayed on an image of the PIC. Scale bar is 5 mm. c Measured trajectories of the lattice (green) and clock (red) beams below and above the MS (yellow region depicts the overlap of the two beams). Scale bar is 100 µm

Compact Photonic Chip System Brings Miniaturized Atomic Clocks Closer to Reality

Researchers have developed a groundbreaking compact photonic chip system that paves the way for miniaturized strontium atomic clocks. The achievement has significant implications for atomic technologies, as miniaturization could lead to a range of benefits in applications such as GPS and communication systems.

Schematic of an optical photonic-memory cell.

All-optical Memory Circuit with High-Speed Operation Developed for Future Signal Processing and Computing Systems

Scientists have developed a new all-optical memory circuit that could revolutionize the way we process signals and carry out computations. This circuit is capable of storing phase information of a slowly-varying electric field. It is based on two mutually coupled lasers subject to external optical injection.

Tunable Lithium Niobate Laser - False-colour SEM image of a heterogeneous Si3N4–LiNbO3 waveguide cross-section. The original SEM image data are shown in Extended Data Fig. 1. Inset: a finite-difference time-domain simulation of the spatial distribution of the hybrid transverse electric mode’s electric-field amplitude with 12% participation in LiNbO3, electric-field maximum is coloured in red and minimum in blue.

Breakthrough in Ultrafast Tunable Lasers with Lithium Niobate Integrated Photonics

In a groundbreaking development, scientists have successfully demonstrated the capabilities of ultrafast tunable lasers using lithium niobate (LiNbO3) integrated photonics. These lasers showcase narrow linewidth while maintaining extreme frequency agility, allowing for tuning rates at petahertz per second.

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