English

On demand ultra short laser flash: controllable optical pulse pairs from a single fiber laser

1127
2024-01-12 13:56:39
See translation

Set up a dual comb fiber laser oscillator, external pulse combination, and real-time detection.
In innovative methods for controlling ultra short laser flashes, researchers from Bayreuth University and Konstanz University are using soliton physics and two pulse combs in a single laser. This method has the potential to greatly accelerate and simplify laser applications.

Traditionally, the pulse interval of a laser is set by dividing each pulse into two pulses and delaying them at different mechanically adjustable distances. Alternatively, two laser sources with slightly different orbital periods ("double combs") can be used to generate rapid travel delays from the superposition of two pulse combs.

Professor Georg Herink, the leader of the Experimental Physics VIII - Ultra Fast Dynamics group at Bayreuth University, and his doctoral student Julia A. Lang collaborated with Professor Alfred Leinstorfer and Sarah R. Hutter from the University of Constance to demonstrate a pure optical method based on two pulse combs in a single laser. It can achieve extremely fast and flexible adjustable pulse sequences.

Meanwhile, this can be achieved in very compact fiberglass light sources. By combining two pulse combs outside the laser, researchers have obtained a pulse mode that can be set with any delay as needed.

The researchers used a technique: two pulses circulate in the laser instead of the usual single light pulse. "There is enough time between two pulses to apply a single 'interference' using the fast optical switch inside the laser," explained Lang, the first author of the study. "Using laser physics, this' intracavity modulation 'causes a change in pulse velocity, causing two pulses to move towards each other in time."

The laser source based on fiberglass was built by Hutter and Leitenstorfer from the University of Constance. Thanks to a special real-time measurement method, researchers at Bayreuth can now accurately observe how short light pulses (called solitons) move when external influences act on them. This real-time spectral interferometry method can accurately measure the distance between each pair of pulses - over 10 million times per second.

"We have demonstrated that we can quickly adjust time over a wide range and achieve freely programmable motion forms," explained Herink. The research now published in Progress in Science proposes an innovative method for controlling solitons, which not only provides new insights into soliton physics, but also opens up possibilities for the rapid and efficient application of ultra short laser pulses.

Source: Laser Net

Related Recommendations
  • Construction of Advanced New Laser Research Centers in American Universities

    The ATLAS R&D center is expected to be completed by mid-2026!A powerful new laser research facility located on the Foothills campus of Colorado State University will begin construction this month. The facility is planned to be put into use in mid-2026 and is the result of 40 years of laser development research at Colorado State University. It is a collaboration with the Fusion Energy Science P...

    2024-10-30
    See translation
  • Coherent launches 532 nm HyperRapid NXT picosecond laser for ultra precision manufacturing of thin film solar cells

    The leader of material processing industry lasers, Cohen Corporation, announced yesterday the launch of its new HyperRapid NXT industrial picosecond laser, with a working wavelength of 532 nm and an average power of 100 W, which can achieve ultra precision manufacturing of thin film solar cells.The second generation solar cells, which are expected to achieve a leap in energy efficiency, are mainly...

    2024-01-25
    See translation
  • Japan and Germany jointly develop ultra high speed laser material deposition technology

    Makino Machine Tool Company, headquartered in Tokyo, Japan, and Fraunhofer Institute for Laser Technology (ILT), headquartered in Aachen, Germany, have collaborated to combine ultra-high speed laser material deposition (EHLA) and near net shape additive manufacturing (EHLA3D) with a five axis CNC platform. The new system developed can efficiently produce, coat, or repair complex geometric shapes o...

    2024-10-25
    See translation
  • Progress in research on neodymium doped strontium aluminate lanthanum magnesium laser crystals by Shanghai Optics and Machinery Institute

    Recently, the Advanced Laser and Optoelectronic Functional Materials Department of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, has made progress in the research of Nd: ASL (Sr0.7Nd0.05La0.25Mg0.3Al22.7O19) laser crystals, and the related achievements were published in Infrared Physics&Technology under the title of "Tunable laser operations on Nd doped cont...

    2024-03-19
    See translation
  • Shanghai University of Technology publishes the latest Nature paper

    With the increasing demand for human data, the requirements for data storage methods are also increasing. Optical Data Storage (ODS) is a light based storage method commonly used in DVDs, which is low-cost and very durable. But ODS usually stores data in a single layer, and the amount of data that can be stored is limited. Gu Min, academician of Shanghai University of Technology, Wen Jing, and Rua...

    2024-02-26
    See translation