English

Shanghai Optics and Machinery Institute has made new progress in the research of high repetition frequency and high energy medium wave infrared lasers

158
2024-05-22 14:41:53
See translation

Recently, the research team of Aerospace Laser Technology and System Department of Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, based on 2.1 μ M Ho: YAG main oscillator amplifier pumped ZGP crystal, achieving high energy 3-5 at kHz repetition frequency μ The output of M medium wave infrared laser and further research on beam quality improvement technology for high-energy medium wave infrared laser. The relevant research results have been published in the Journal of Lightwave Technology and Laser Physics Letters, respectively, titled "High Repetition Rate 52-mJ Mid Infrared Laser Source Based on ZnGeP2 MOPA System" and "High repetition frequency, high energy mid wave infrared ZnGeP2 MOPA system".

High repetition rate, large pulse energy tunable 3-5 μ The mid infrared laser has important significance in many fields such as atmospheric monitoring. Among the methods that can achieve medium wave infrared laser output, nonlinear frequency conversion technology has advantages such as all solid-state, wide wavelength tuning range, and less heat generation. Due to the damage threshold of solid materials, the current pulse energy of medium wave infrared lasers at the kilohertz repetition rate level is only~10mJ, which is difficult to meet the needs of application fields.

In this study, researchers compensated for the crystal thermal lens and thermally induced birefringence depolarization effect through optical and structural design, and ultimately achieved high polarization 2.1 with a repetition frequency of 2kHz and an average power of~200W using the Ho: YAG MOPA system μ M laser output. By using its pumped ZGP optical parametric oscillator and amplifier, a 3-5 pulse repetition rate of 2kHz, average power of 103.9W, pulse energy of~52mJ, and pulse width of 18.3ns were achieved μ M produces mid infrared laser output, but there is a problem of poor beam quality (M2=10) in mid wave infrared laser. By studying techniques such as pump allocation ratio, single wavelength injection, and amplifier seed and pump divergence angle matching, the beam quality M2<4 was achieved at an average power of 53.3 W and a pulse energy of 26.7 mJ for medium wave infrared lasers. This research work has achieved high brightness, high repetition rate, and high-energy medium wave infrared laser output, enhancing the application prospects of this type of laser.

This work is supported by the National Natural Science Foundation of China.

Figure 1 Structure diagram of high repetition rate and high energy medium wave infrared laser device


Figure 2 ZGP OPA Output Power and Pulse Width


Figure 3 Medium wave infrared laser spectrum
Source: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

Related Recommendations
  • The wide application of laser plastic welding technology in the field of automobile manufacturing

    With the rapid development of society, people's demands for energy conservation, emission reduction, and safety in automobiles are increasing. Automobile manufacturers are seeking lightweight manufacturing processes for automobiles, changing traditional component packaging processes, and so on. Laser plastic welding technology has emerged, and below is a brief sharing of the application of plastic...

    2024-09-26
    See translation
  • Amazemet uses Siemens Xcelerator software for scaling metal 3D printing

    Polish metal 3D printing company Amazemet uses the Xcelerator software combination from industrial manufacturing company Siemens.The spin off company of Warsaw University of Technology is using Siemens workflow management software to develop its metal powder atomizer and 3D printing post-processing equipment.Amazemet was founded in 2016, and its ultrasonic atomization device is capable of producin...

    2024-04-18
    See translation
  • 10.30 Shenzhen Munich South China Laser Exhibition awaits you

    The Munich South China Laser Exhibition is about to open!As a member exhibition of the South China International Intelligent Manufacturing, Advanced Electronics, and Laser Technology Expo (referred to as "LEAP Expo"), it will be held from October 30 to November 1, 2023 at the Shenzhen International Convention and Exhibition Center (Bao'an New Hall) in conjunction with the Munich South China Elect...

    2023-10-26
    See translation
  • ARRI manufactures new Orbiter beams to achieve optimal brightness

    ARRI has launched Orbiter Beam, further expanding the range of accessories for LED spotlights. This is the first beam optical device in the ARRI LED lighting product portfolio. A new optical concept has been developed specifically for this reflector. The beam intensity level of Orbiter Beam has an output comparable to the ARRI Daylight M series M18 at a more compact beam angle.These high-intensity...

    2024-02-15
    See translation
  • Making Infrared Light Visible: New Equipment Utilizes 2D Materials to Convert Infrared Light

    Infrared imaging and sensing technology can be used in various fields, from astronomy to chemistry. For example, when infrared light passes through a gas, sensing changes in light can help scientists identify specific properties of the gas. The use of visible light may not always achieve this sensing.However, existing infrared sensors are bulky and inefficient. In addition, due to the use of infra...

    2024-06-24
    See translation