English

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

105
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
  • Researchers Obtaining Scientific Returns from Raman Spectroscopy for External Bioexploration Using Lasers

    We investigated the potential of laser selection in a wide optical range from ultraviolet to visible light, and then to infrared (excitation wavelengths of 325, 532, 785, and 1064 nm), in order to combine and analyze extreme microorganisms related to Earth (such as Cryptomeria elegans, cold floating nematodes, and circular green algae), carbon water compound molecules, as well as simulated mineral...

    2023-10-23
    See translation
  • Analysis of Optically Pumped Semiconductor Laser Technology for Promoting the Development of Life Sciences

    Optically Pumped Semiconductor Lasers technology has achieved great success in the market due to its various unique advantages, with over 100000 OPSL devices currently operating in the market. This article introduces the application and new developments of OPSL in the fields of flow cytometry and DNA sequencing.OPSL has the characteristics of flexible wavelength extension, adjustable power, compac...

    2024-02-01
    See translation
  • The 20th Wuhan Optoelectronics Expo 2025 to Open Grandly

    From May 15 to 17, 2025, the 20th Wuhan Optoelectronics Expo will be held grandly at the China Optics Valley Convention and Exhibition Center in Wuhan. With the theme "Light Connects Everything, Intelligence Leads the Future," this year's expo will focus on six major fields: laser technology and applications, optics and precision optics, information communication and semiconductors, automotive opt...

    03-14
    See translation
  • Trumpf 3D printing technology innovation: zero support structure, low waste, unlimited possibilities

    Ditzingen, Germany, September 8, 2023) - TRUMPF, the world's leading provider of machine tools and laser technology solutions, has improved its 3D printing software TruTops Print to print parts with suspension angles as low as 15 degrees with little need for support structures. Trumpf will present its new technology at the European International Machine Tool Show (EMO 2023) in Hannover, Germany.Fi...

    2023-09-13
    See translation
  • Tiedra Famaceutica uses Macsa ID's SPA2 CB laser marking system

    Tiedra Famaceutica was founded by members of the Tiedra family in 2003 and is a manufacturer of contact lenses, health and ophthalmic products, as well as diagnostic instruments used in optometry and ophthalmic clinics.Before installing the SPA2 CB laser model for Macsa id, Tiedra used a pantograph, which is a quadrilateral system composed of hinged rods. This manual process provides limited marki...

    2023-12-14
    See translation