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.

Bathymetric map of the ocean floor showing the continental shelves and oceanic plateaus (red), the mid-ocean ridges (yellow-green) and the abyssal plains (blue to purple) Credit: NOAA

Researchers Develop High-Efficiency Blue Laser for Advanced Bathymetric Lidar Ocean Exploration

A team of researchers has recently announced the successful development of a high-efficiency, nanosecond pulsed blue laser operating at 486.1 nm for Advanced Bathymetric Lidar. They achieved this feat by utilizing a frequency quadrupled thulium-doped fiber amplifier (TDFA), marking the first time such a device has been implemented for this purpose.

Injection of a Helium-Neon laser beam into a plastic optical fiber.

Yttrium-Aluminum-Garnet Crystal-Derived Silica Fiber Laser Boasts Over 60% Optical-to-optical Conversion Efficiency

Researchers have successfully fabricated a silica optical fiber derived from yttrium-aluminum-garnet (YAG) crystals, demonstrating superior output power and optical-to-optical conversion efficiency in linearly polarized single-frequency fiber lasers (LPSFFLs).

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