English

Progress in research on neodymium doped strontium aluminate lanthanum magnesium laser crystals by Shanghai Optics and Machinery Institute

1153
2024-03-19 16:14:21
See translation

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 continuum and lanthanum aluminum crystals".

Neodymium (Nd3+) ion is one of the common activating ions, and its absorption peak matches the emission wavelength of commercial laser diodes (LDs), with high absorption efficiency at 0.9, 1.05, and 1.35 μ There are emission peaks at position m, and laser emission has been achieved in various matrix materials. Nd: ASL is a typical disordered crystal, belonging to the hexagonal crystal system. The high disorder leads to its spectral broadening, which is beneficial for generating lasers of different wavelengths.

In order to investigate its tuning characteristics, the research team grew Nd: ASL crystals with a doping concentration of 5%, and measured their fluorescence lifetime to be approximately 371.8 μ S. At 1.05 μ Near m, its fluorescence spectrum has four strong and continuous emission spectra. A birefringent filter was inserted into the V-shaped resonant cavity for tunable laser experiments. By using output mirrors with transmittance of 5%, 7%, and 10%, three independent wavelengths (1050, 1062, and 1074 nm) of laser output were obtained. The wavelength range is 1049.59-1054.43 nm and 1059.71-1078.18 nm for tuning, with a tuning width greater than 20 nm, which is consistent with the spectrum. The phenomenon of multi wavelength laser output was also observed in the experiment. The results indicate that Nd: ASL crystals are a gain medium suitable for tunable lasers. Compared with single wavelength laser media, controlling and changing the wavelength is much more convenient and suitable for complex application scenarios with higher accuracy or more wavelengths.

This work has received support from projects such as the National Natural Science Foundation of China.


Figure 1. Fluorescence spectrum of Nd: ASL crystal

Figure 2. Laser output with three wavelengths at different output mirror transmittance

Figure 3. Output power at different wavelengths under the same absorption pump power

Source: Shanghai Institute of Optics and Mechanics

Related Recommendations
  • Atomstack Maker A5 V2: A laser engraving machine suitable for beginners

    In the recent DIY field, innovative and increasingly affordable laser engraving machines have emerged, mainly designed for first-time users in this field. A particularly noteworthy example in this regard is the Atomstack Maker A5 V2 model. This device is known for its versatility and ease of use, making it an ideal choice for beginners in the world of laser engraving.The Atomstack Maker A5 V2 is a...

    2024-01-03
    See translation
  • Professor Hu Yanlei from the University of Science and Technology of China, Nat Commun Preparation of Durable Janus Thin Films with Mode Switching by Femtosecond Laser

    Janus film is widely used in fields such as oil-water separation, water mist collection, and wearable patches due to its unique transmembrane directional water transport function. The function of traditional Janus thin films comes from the thickness direction of microchannels and single-sided chemical coating modifications (single-sided hydrophilic and hydrophobic modification of hydrophobic and h...

    2024-02-22
    See translation
  • Chinese researchers enhance perovskite lasers by suppressing energy loss

    Limiting Auger recombination enables “record” quasi-continuous wave laser output.For years, engineers have sought better ways to build tiny, efficient lasers that can be integrated directly onto silicon chips, a key step toward faster, more capable optical communications and computing.Today’s commercial lasers are mostly made from III-V semiconductors grown on specialized substrates—a process that...

    08-25
    See translation
  • Intel installs the first EUV manufacturing tool that can emit lasers hotter than the sun

    Chip giant Intel announced that it has completed the assembly work of the world's first commercial high numerical aperture (NA) extreme ultraviolet lithography (EUV) scanner. This device greatly improves the resolution and feature scaling of next-generation chips by changing the optical design used to project printed images onto silicon wafers.This lithography equipment weighing 150 tons has been ...

    2024-04-22
    See translation
  • Afinum Management acquires significant stakes in two laser companies

    Recently, Afinum Management, a private equity firm based in Munich, Germany, has acquired a large stake in two laser companies, with the intention of opening up new laser markets by combining the strengths of three parties.According to media reports, the two companies are ARC Laser in Germany and GNS neo Laser in Israel, and Afinum has agreed with the founders of the two companies that the acquisi...

    2024-08-08
    See translation