However, the space-time distortion caused by gravitational waves is very small. For example, when GW150914 reaches the earth, the strain is only 10-21. LIGO is an L-shaped modified Michelson interferometer, and its structure is shown in Figure 1. Two 4 km long interference arms are perpendicular to each other, and the arm length change produced…
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Researchers develop new laser pointer detector
Recently, a group of international researchers developed a new instrument for the laser pointer Interference Gravitational Wave Observatory (LIGO), which can remove quantum noise and expand the detector’s detection range in the universe. This new device called “quantum vacuum squeezer” helped LIGO reduce this confusing quantum crack phenomenon and expand the detection range of the detector by…
India will build a laser pointer to interfere with gravitational waves
The website of the British “Nature” magazine reported on January 22 that India plans to soon start building its own LIGO (laser pointer Interferometric Gravitational Wave Observatory)-Advanced LIGO (aLIGO), and the site has received final approval. The US$177 million observatory is expected to be completed in 2024 and is expected to increase the sensitivity and accuracy…
Circular beam semiconductor side emitting laser pointer
The semiconductor laser has been widely used since its birth in 1962, but it still has a much criticized shortcoming, that is, a large divergence angle and an elliptical light emission. Usually the vertical half-angle divergence angle is greater than 30°, and the horizontal direction is about 10°, which results in lower beam quality and…
The most efficient nanowire laser pointer in the world
Perovskite materials have the advantages of low cost, simple process and high efficiency, and are commonly used materials for solar panel research. Now, researchers have proved that nanowire laser pointer made from lead halide perovskites are the most efficient lasers known. Topological image of the nanowire (left insert). At room temperature, two different halide nanowire laser emission…
Nanosecond pulse fiber laser pointer for laser welding of dissimilar metal materials
Fiber lasers have excellent applications in industrial marking and engraving. Not only that, fiber laser pointer have a wide pulse width, high peak power, high frequency, and excellent beam quality, which can meet the needs of high-quality industrial processing. Dissimilar metal materials also have excellent performance in welding, mainly used in 3C electronics, new energy and other…
New breakthrough in high-density data storage ultrafast laser pointer
It is reported that laser-based data storage and retrieval technology will increase the storage capacity of traditional optical discs, such as DVDs and Blu-ray discs, without requiring special preparation steps. This scalable technology uses the 3D volume of the optical disc to store information in a multi-level structure, and the ultra-fast laser pointer is used to maintain…
Wear goggles to operate the laser pointer to make your eyes safer
I believe everyone is no stranger to laser welding machines. As the users of laser welding machines increase, more and more people are beginning to pay attention to the fact that laser pointer are harmful to the human body, so whether the laser welding machine is harmful to the human body during the welding operation Does it…
Blood turns into a laser pointer transmitter for drug testing and cancer treatment
It is reported that researchers from the University of Michigan in the United States have developed a new technology to monitor cell structure and molecular level activities by combining laser pointer with FDA-approved green fluorescent dyes. This work may one day improve clinical imaging and will better monitor tumors and other cell structures; and during drug testing,…
Interpretation of Femtosecond Laser Pointer Operation Characteristics
Femtoseconds can also be called femtoseconds, which is a unit of measurement for marking the length of time. Taking 1 second as a reference, 1 femtosecond is only one quadrillionth of a second. It can be seen that femtoseconds represent a very short time. Even if light can fly 300,000 kilometers per second in a…