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Miniature Mod Locking Laser

27.11.2023

Scientists from the California Institute of Technology (Caltech) have unveiled an innovative miniature mode-locked laser (MLL) that, due to its compact size, can be integrated into microcircuits. This laser is used to generate ultra-short pulses, allowing precise measurements in the microscopic world. Scientists claim that such a laser will be useful not only in specialized devices, but also in ordinary smartphones.

The creation of a miniature mode-locked laser opens new horizons for the application of laser technology in everyday life. The integration of such devices into smartphones opens up the potential for a variety of applications, including vision diagnostics and environmental analysis, which could be an important step in the development of medical diagnostics and environmental monitoring.

To make microscale measurements, you need a laser that has the ideal combination of power and precision. However, most existing lasers that meet these requirements are extremely bulky, expensive to maintain, and require large amounts of electricity. The laser developed by American scientists fits on the tip of a finger and is capable of making a real revolution.

These lasers can be used to solve a variety of problems, ranging from navigation without the use of GPS to working with atomic clocks. However, the main goal for the Caltech team was to create a device that could easily fit in a bag or pocket. Scientists have managed to exceed their expectations by creating a laser that can be built into the chip of a regular smartphone. The material used in the manufacturing process is thin film lithium niobium (TFLN), which allows the use of external radio frequency electrical signals to precisely control laser pulses. The laser material was connected to a special type of conductor compatible with TFLN.

Test results showed that the laser was capable of generating 4,3 picosecond pulses in the near-infrared region with a peak power of about 0,5 W. The developers note that the device is highly versatile in operating modes, which in the future will facilitate its integration into mobile devices such as smartphones and tablets.

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However, American sports medicine specialist Thomas Anthony does not recommend this test for older people.

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