Deep-ultraviolet all-solid-state laser refers to the technology of obtaining deep-ultraviolet coherent radiation by using a solid-state laser in the near-infrared band or a titanium: sapphire (Ti: sapphire) laser as a fundamental frequency laser source, through multi-stage frequency conversion of a nonlinear optical crystal. With a wavelength between 213230nm, this band laser has specific applications, including two-photon absorption of oxygen atoms and xenon, vibration bands of NO and O2, metal transitions, etc. This compact solid-state laser solution offers many advantages in alternative solutions with wavelengths <230nm, thereby="" opening="" up="" new="" application="" areas="" and="" enabling="" other="" solutions="" to="" be="" more="" practically="" used="" outside="" the="">
In the Hans Press "Optical Electronics" journal, there are papers that will focus on the research progress of diode-pumped deep ultraviolet lasers at home and abroad, introduce nonlinear optical frequency conversion technology, nonlinear crystals, and use near-infrared lasers for frequency doubling, and Frequency and other technologies to realize the experimental program of deep ultraviolet laser.
All solid-state deep ultraviolet lasers are used in light emission spectroscopy, Raman spectroscopy, precision micromachining and other fields because of their small size, narrow line width, and high reliability. Ultraviolet lasers have broad application prospects in the fields of gene sequencing, large optical data storage, gas detection, Raman spectroscopy, space optical communication and medical treatment. Using multi-level frequency conversion technology, DUV laser can be emitted through a nonlinear crystal. So far, it is the best solution to realize DUV coherent light source, and the method of realizing deep ultraviolet laser output can be divided into sum frequency and frequency doubling.
Due to the complexity of the sum frequency technology, poor stability and practical difficulties, although the sum frequency technology has harsh application conditions, it is easier to implement short-wave DUV than the frequency doubling technology; non-linear frequency conversion technology, new high-efficiency non-linear frequency conversion crystal , Frequency conversion and frequency technology are the focus of UV laser research; realizing the output of all solid-state deep ultraviolet lasers through the multi-harmonic conversion of nonlinear crystals is an effective way to develop all-solid-state deep ultraviolet laser sources. This technology is limited by nonlinearity. The transmittance and phase matching conditions of the crystal in the deep ultraviolet band. The current method of realizing deep ultraviolet output is mainly frequency doubling technology, and this technology is realized through nonlinear crystals. The output power of all solid-state deep ultraviolet lasers at home and abroad is low, so the future development direction of all solid-state deep ultraviolet lasers is mainly Discovering new nonlinear crystals and increasing the output power, high beam quality, narrow line width deep ultraviolet laser source is an important task of deep ultraviolet laser.
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