It is understood that the advanced solid-state laser and fiber laser expert conference held in May 2013 at the Photonics Exhibition in Munich, Germany, mainly discussed laser technology, laser development trends and laser development prospects, attracted the audience of Fanbo, and the venue was packed.

The meeting was held in the afternoon of May 14 and lasted for three hours. It was divided into three separate departments, which discussed the research of semiconductor array pumped solid-state lasers, fiber lasers and ultra-fast lasers, respectively. Distinguished experts in the field of R&D and laser manufacturing related academic-industrial applications have made academic presentations, as well as lectures by relevant researchers from Nufern and the University of Southampton, UK.

The laser conference invited Professor Andreas Tünnermann, the director of the Institute of Research and Development, to chair the meeting. He gave an inspiring speech to introduce the growing importance of the latest solid-state laser and fiber laser manufacturing industries, the significance of which has grown exponentially with laser photonics.

He concluded, "In the past few years, semiconductor array-pumped solid-state lasers have become a competitive and tunable laser design with a wide range of applications in research and industry. We have achieved continuous operation output. Lasers with energies on the order of 10 kW and electro-optical efficiencies as high as 30% include advanced fiber lasers, disc lasers, and slab laser structures."

"As for the pulse mode of operation, femtosecond lasers with kilowatt output power have been reported. Fiber lasers and fiber amplifiers have made a prominent contribution to this achievement and will be reviewed and discussed in particular. In addition, market development is also a discussion. Sub-topics."

Growing demand

The first speaker to give a presentation on DPSSL (Semiconductor Pump Laser) was Waldemar Sokolowski from Deutsche Telekom, whose title was titled "1kW Power Multipass Laser Platform Based on Material Processing". The presentation pointed out that the development of the industry requires higher power lasers and more general laser solutions, and Trumpf has many new research findings.

He concluded, "The industry demand we usually hear is that many producers are looking for a general-purpose laser that can satisfy all kinds of material processing. However, the experimental research of TRUMPF shows that different types of materials processing applications In fact, different types of lasers are needed as processing tools."

Sokolowski said: "There are many influencing factors in the process - such as material type, material thickness, processing quality requirements and product structure, which means the solution should be different."

Next, Sokolowski introduced the latest products of Trumpf's various laser types to the participants: Trudisk1000, whose characteristic parameters are: back reflection height is not agile, modular design, energy tunable range 2kW, combined with extreme cold heat surroundings.

Although the Trudisk 1000's energy is temporarily unable to upgrade, its total efficiency is as high as 30%, and it has a monolithic integrated circuit design and high back reflection accommodation, similar to the TruDiode 903 indicator. This type of laser has a wide range of applications, such as brazing, welding, cutting, deposition, hardening, and rapid prototyping.

Chip laser

Adolf Giesen, director of the Institute of Technical Physics at the Central Institute of Aeronautics and Astronautics, introduced the many advantages of sheet lasers.

“The trade in this technology can be divided into three hub areas: multimode high power lasers, pulsed sheet lasers, and system miniaturization studies.”

“In the first field, there are now multi-mode laser systems based on single-chip output power of 10 kW, and other laser systems based on different structures with output powers on the order of several kilowatts.”

"In the second field, it is subdivided into three sub-areas: a mode-locked oscillator that provides an output with a uniform power of 80 W and a pulse width of 800 fs. The regenerative amplifier provides a repetitive frequency of 100 kHz, a pulse width of 400 fs, and a single pulse energy of 40 μJ. Output, or 30 ns in cavity cavity, 80 mJ energy, 750 W laser output; miniaturized system based on a mobile phone-sized DC power supply unit, delivering 3 W energy at 532 nm wavelength."

Giesen also introduced a technological breakthrough in the research and development of thin-film lasers. "The research group of Peng, Lim, Cheng, Guo, Cheah and Lai of Nanyang Technological University in Singapore named "1.1kW near-base model Yb:YAG sheet." The research paper of Laser will be published in the Optical Express," Giesen said.

He also cited Jenoptik's latest research, which built a JenLas D2 femtosecond regenerative thin-film laser and proposed the concept of a so-called change sheet. In terms of research, Giesen highly praised the research results of Max Born Institute and Garching MPQ. The former obtained the Yb:YAG thin film CPA system with energy of 1J and pulse width of 5ps; the latter used the same medium and obtained 3kHz weight. Laser output with a frequency, pulse width of 1.6 ps and a single pulse energy of 28 mJ.

Giesen concluded that there are positive developments in the field of thin-film lasers, including several laser system models that transmit 100kW-class power, such as the most likely high-power "human eye safety" model, and the coupling of larger laser energy ranges. Kilojoule output (coherent company).