Contact Information:

Media Contact

Dr. Yuriy Stepanenko

Kredyty mieszkaniowe Kredyty mieszkaniowe

Sprawdź aktualny ranking najlepszych kredytów mieszkaniowych w Polsce - atrakcyjne kredytowanie nieruchomości. - Press Release Distribution
RSS - Press News Release
Add Press Release

Small, inexpensive, and incredibly resilient: A new femtosecond laser for industry

Small, inexpensive, and incredibly resilient: A new femtosecond laser for industry
( A team at the University of Warsaw, Faculty of Physics has created a laser capable of generating ultrashort pulses of light even under extremely difficult external conditions. This unique combination of precision and resilience is due to the fact that the whole process of generating femtosecond laser pulses takes place within a specially-selected optical fiber.

Its appearance seems quite inconspicuous: just a flat, rectangular box, tens of centimeters across and about the same height, with a thin, shiny-tipped "thread" leading out of it, so long that it is rolled up into a coil. This small instrument, built by physicists from the Faculty of Physics at the University of Warsaw, Poland, is the first pulse laser of its type, capable of generating femtosecond light pulses under truly extreme environmental conditions. Its considerable resistance to external factors was achieved by forcing the entire laser-generating activity to occur directly within the optical fiber itself. As a result, the device has the simplest possible design, and is therefore highly dependable.

Femtosecond pulses last just a few millionths of a billionth of a second. The lasers used to generate such pulses usually require an optic resonator - a precision set of mirrors that is sensitive to external conditions. The instrument constructed at the UW Faculty of Physics, however, does not use mirros but an optical fiber.

"In our laser, the ultrashort pulses are generated directly in the fiber optic cable. The design is so simple that there is nothing that might break down", says Dr. Yuriy Stepanenko (UW Faculty of Physics and IPC PAS). And he admits that his team treated the new laser in ways highly unrecommended by the manufacturers of normal precision optical instruments: "We turned on the laser and then heated up a segment of the optical fiber to more than 120 degrees Celsius. The temperature gradient was therefore really large, and the laser still worked well. We also put it into a shaker, with acceleration in excess of 7 g. It still worked afterwards, and most interestingly it also worked during the testing."

The femtosecond laser from the UW Faculty of Physics generates pulses in an ytterbium-doped optical fiber. The wavelength of the light emitted is close to a micron (1030 nanometers), which can then be multiplied by generating higher-order harmonics.

"Optical fibers have for years been known as a source of laser radiation, including laser pulses. We have taken things a step further: we have carefully selected the right combination of laser pump diode and fiber optic cable, and developed a way to stabilize the whole system so that it is most energy-efficient for it to work in the pulse regime we wanted", explains PhD student Jan Szczepanek (UW Faculty of Physics).

The optical fiber itself is flexible, and so laser pulses can be easily led into places inaccessible to traditional laser techniques. For industrial applications, it is no less important that the laser beam still preserves excellent spatial quality irrespective of how the fiber optic cable is positioned: its cross-section still shows the optimal "bell curve" (Gaussian distribution). The fiber optic cable, which acts as the main optical resonator, works with extraordinary stability, opening up the possibility of extending the laser to include further optical instruments in accordance with the users' specific needs.

The "spaghetti noodle" laser, as its designers jokingly describe it, also has one more advantage: the simplicity of its design will make it a relatively inexpensive instrument. Built using commercially available components (a pump semiconductor diode and its driver), it would cost just a few thousand euro. Companies interested in commercializing the device could also seek additional ways to cut the cost, for instance by using a custom-designed driver.

Given its capacity to work stably under extremely difficult conditions, the femtosecond fiber-optic laser from the Institute of Experimental Physics, UW Faculty of Physics, is excellently suited for industrial applications, perhaps most promisingly in the field of micro-scale surface finishing. For instance, the ultrashort, femtosecond-duration pulses can be used to create micro-holes with smooth, precision-profiled edges. Other potential applications lie in cutting semiconducting solar panels and putting markings on such hard and precious materials as diamonds. Femtosecond lasers here have an advantage over instruments that generate longer pulses: the thermal stresses occurring in the material to be so marked are quite small, thus minimizing the risk of its discoloration or cracking. The "spaghetti noodle" laser could also be an important element of devices generating terahertz radiation, such as airport scanners, as well as refined measurement devices (such as in two-photon microscopy) and medical equipment (such as in optical coherence tomography, used to study soft tissues like the retina).


Physics and Astronomy first appeared at the University of Warsaw in 1816, under the then Faculty of Philosophy. In 1825 the Astronomical Observatory was established. Currently, the Faculty of Physics' Institutes include Experimental Physics, Theoretical Physics, Geophysics, Department of Mathematical Methods and an Astronomical Observatory. Research covers almost all areas of modern physics, on scales from the quantum to the cosmological. The Faculty's research and teaching staff includes ca. 200 university teachers, of which 88 are employees with the title of professor. The Faculty of Physics, University of Warsaw, is attended by ca. 1000 students and more than 170 doctoral students.


Dr. Yuriy Stepanenko
Institute of Experimental Physics, Faculty of Physics, University of Warsaw
tel. +48 22 5532738, +48 502 944057


"Simple all-PM-fiber laser mode-locked with a nonlinear loop mirror"; J. Szczepanek, T. M. Karda?, M. Michalska, Cz. Radzewicz, Y. Stepanenko; Optics Letters, Vol. 40, Issue 15, pp. 3500-3503 (2015); DOI: 10.1364/OL.40.003500

The website of the Division of Optics, Faculty of Physics, University of Warsaw.
Faculty of Physics at the University of Warsaw website.
Press Office for the Faculty of Physics at the University of Warsaw.

Stability of the new femtosecond laser constructed at the Institute of Experimental Physics, Faculty of Physics, University of Warsaw. (Source: UW Physics)


Scientists at the Institute of Experimental Physics, Faculty of Physics, University of Warsaw have created a fiber-optic-based femtosecond laser. Above: PhD student Jan Szczepanek at the lab. (Source: UW Physics, Grzegorz Krzyżewski)

[Attachments] See images for this press release:
Small, inexpensive, and incredibly resilient: A new femtosecond laser for industry


Penn researchers use nanoscopic pores to investigate protein structure

Penn researchers use nanoscopic pores to investigate protein structure
University of Pennsylvania researchers have made strides toward a new method of gene sequencing a strand of DNA's bases are read as they are threaded through a nanoscopic hole. In a new study, they have shown that this technique can also be applied to proteins as way to learn more about their structure. Existing methods for this kind of analysis are labor intensive, typically entailing the collection of large quantities of the protein. They also often require modifying the protein, limiting these methods' usefulness for understanding the protein's behavior in its natural ...

Aquatic hunger games: Archerfish spit the distance for food

Aquatic hunger games: Archerfish spit the distance for food
Move over, Katniss Everdeen. For archerfish, the odds are ever in their favor, according to new research from Wake Forest University. The sharp-shooting fish's ability to spit water to hit food targets has been well documented, but a new study published online in the journal Zoology showed for the first time that there is little difference in the amount of force of their water jets based on target distance. And, when given the choice, the fish preferred closer targets. The study was co-authored by Wake Forest researchers Morgan Burnette, a biology graduate student, ...

Warming climate is deepening California drought

Warming climate is deepening California drought
A new study says that global warming has measurably worsened the ongoing California drought. While scientists largely agree that natural weather variations have caused a lack of rain, an emerging consensus says that rising temperatures may be making things worse by driving moisture from plants and soil into the air. The new study is the first to estimate how much worse: as much as a quarter. The findings suggest that within a few decades, continually increasing temperatures and resulting moisture losses will push California into even more persistent aridity. The study appears ...

Study shows what business leaders can learn from Formula One racing

COLUMBUS, Ohio - Formula One racing teams may have a lesson to teach business leaders: Innovation can be overrated. That's the conclusion from academic researchers who pored over data from 49 teams over the course of 30 years of Formula One racing. They found that the teams that innovated the most - especially those that made the most radical changes in their cars - weren't usually the most successful on the race course. Moreover, radical innovations were the least successful at exactly the times when many business leaders would be most likely to try them: when there ...

How newts can help osteoarthritis patients

A research team at York has adapted the astonishing capacity of animals such as newts to regenerate lost tissues and organs caused when they have a limb severed. The research, which is funded by a £190,158 award from the medical research charity Arthritis Research UK, is published in Nature Scientific Reports. The scientists, led by Dr Paul Genever in the Arthritis Research UK Tissue Engineering Centre in the University's Department of Biology, have developed a technique to rejuvenate cells from older people with osteoarthritis to repair worn or damaged cartilage ...

New theory: If we want to detect dark matter we might need a different approach

Physicists suggest a new way to look for dark matter: They beleive that dark matter particles annihilate into so-called dark radiation when they collide. If true, then we should be able to detect the signals from this radiation. ­The majority of the mass in the Universe remains unknown. Despite knowing very little about this dark matter, its overall abundance is precisely measured. In other words: Physicists know it is out there, but they have not yet detected it. It is definitely worth looking for, argues Ian Shoemaker, former postdoctoral researcher at Centre ...

Stem cells derived from amniotic membrane can benefit retinal diseases when transplanted

Putnam Valley, NY. (Aug. 19, 2015) - A team of researchers in South Korea has successfully transplanted mesenchymal stromal cells (MSCs) derived from human amniotic membranes of the placenta (AMSCs) into laboratory mice modeled with oxygen-induced retinopathy (a murine model used to mimic eye disease). The treatment aimed at suppressing abnormal angiogenesis (blood vessel growth) which is recognized as the cause of many eye diseases, such as diabetic retinopathy and age-related macular degeneration. The researchers reported that the AMSCs successfully migrated to the retinas ...

NIH scientists and colleagues successfully test MERS vaccine in monkeys and camels

National Institutes of Health (NIH) scientists and colleagues report that an experimental vaccine given six weeks before exposure to Middle East respiratory syndrome coronavirus (MERS-CoV) fully protects rhesus macaques from disease. The vaccine also generated potentially protective MERS-CoV antibodies in blood drawn from vaccinated camels. A study detailing the synthetic DNA vaccine appears in the Aug. 19 Science Translational Medicine. MERS-CoV, which causes pneumonia deep in the lungs, emerged in 2012 and has sickened more than 1,400 people and killed 500, mostly in ...

Seizures in neonates undergoing cardiac surgery underappreciated and dangerous

Summary: In 2011, the American Clinical Neurophysiology Society issued a guideline recommending that neonates undergoing cardiac surgery for repair of congenital heart disease be placed on continuous encephalographic (EEG) monitoring after surgery to detect seizures. These recommendations followed reports that seizures are common in this population, may not be detected clinically, and are associated with adverse neurocognitive outcomes. Yet, in a discussion at the 2014 Annual Meeting of The American Association for Thoracic Surgery, 80% to 90% of the audience was not following ...

Queen's researcher finds new model of gas giant planet formation

KINGSTON - Queen's University researcher Martin Duncan has co-authored a study that solves the mystery of how gas giants such as Jupiter and Saturn formed in the early solar system. In a paper published this week in the journal Nature, Dr. Duncan, along with co-authors Harold Levison and Katherine Kretke (Southwest Research Institute), explain how the cores of gas giants formed through the accumulation of small, centimetre- to metre-sized, "pebbles. "As far as we know, this is the first model to reproduce the structure of the outer solar system - two gas giants, two ...


How your brain decides blame and punishment -- and how it can be changed

Uniquely human brain region enables punishment decisions

Pinpointing punishment

Chapman University publishes research on attractiveness and mating

E-cigarettes: Special issue from Nicotine & Tobacco Research

Placental problems in early pregnancy associated with 5-fold increased risk of OB & fetal disorders

UT study: Invasive brood parasites a threat to native bird species

Criminals acquire guns through social connections

Restoring ocean health

Report: Cancer remains leading cause of death in US Hispanics

Twin study suggests genetic factors contribute to insomnia in adults

To be fragrant or not: Why do some male hairstreak butterflies lack scent organs?

International team discovers natural defense against HIV

Bolivian biodiversity observatory takes its first steps

Choice of college major influences lifetime earnings more than simply getting a degree

Dominant strain of drug-resistant MRSA decreases in hospitals, but persists in community

Synthetic biology needs robust safety mechanisms before real world application

US defense agencies increase investment in federal synthetic biology research

Robots help to map England's only deep-water Marine Conservation Zone

Mayo researchers identify protein -- may predict who will respond to PD-1 immunotherapy for melanoma

How much water do US fracking operations really use?

New approach to mammograms could improve reliability

The influence of citizen science grows despite some resistance

Unlocking secrets of how fossils form

What happens on the molecular level when smog gets into the lungs?

Using ultrasound to clean medical instruments

Platinum and iron oxide working together get the job done

Tiny silica particles could be used to repair damaged teeth, research shows

A quantum lab for everyone

No way? Charity's logo may influence perception of food in package

[] Small, inexpensive, and incredibly resilient: A new femtosecond laser for industry is a service of DragonFly Company. All Rights Reserved.
Issuers of news releases are solely responsible for the accuracy of their content.