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1 IntroductionDFG technology uses a near-infrared light source as a pump pulse, and realizes wavelength conversion through nonlinear effects to generate signal pulses. In the nonlinear crystal, the pump pulse and the signal pulse convert energy to the mid-infrared band through the three-wave mixing…
2025/07/20 18:35
1 IntroductionMid-infrared ultrashort pulse lasers with a wavelength of 2-5 μm have irreplaceable application value in basic research and industrial applications due to their unique band position. In the field of molecular detection, 2-5 μm lasers can resonate with molecules such as CO and N2O,…
2025/05/30 14:14
2 Results and DiscussionThe absorption cross section is an important parameter for optical pumping of laser crystals. The calculation formula is: σabs = α(λ)/N, where N is the concentration of Nd3+ in the crystal (the number of ions per unit volume), which is 1.78×1020 cm-3, and α(λ) is the…
2025/05/22 17:29
2 Results and DiscussionIn order to obtain more crystal structure information, the Rietveld method was used to refine the structure of Nd:YLF (www.wisoptic.com) crystal powder sample. The structural data of YLF crystal was used as the initial data for refinement. Nd3+ and Y3+ are in the same…
2025/04/28 11:08
2 Results and DiscussionFigure 4 is the XRD spectrum of the polycrystalline material prepared by the melting method. Its diffraction peak position and relative intensity are basically consistent with the YLF standard card (PDF#00-017-0874), and the agreement is good, indicating that the…
2025/04/14 17:15
1 Experiment Method1.1 Raw material preparationYF3, LiF and NdF3 with a purity of 99.999% were used as initial raw materials. They were accurately weighed in a vacuum glove box at a ratio of n(LiF):n(YF3):n(NdF3)=51:48:2, loaded into a raw material bottle and mixed thoroughly. Then, the raw…
2025/04/08 16:37
Research BackgroundLithium Yttrium Fluoride (LiYF4, YLF) crystal has many excellent properties such as low melting point, low phonon energy, small thermal lens effect, natural polarization, etc. It is a laser matrix material with excellent performance. YLF belongs to the tetragonal structure of…
2025/03/31 14:44
04 Theoretical study of thermal properties As can be seen from Figure 5 (a), when the BBO crystal (www.wisoptic.com) matching temperature is 60 ℃, as the 266 nm deep ultraviolet laser power gradually increases from 0.32 W to 1.24 W, 2.09 W and 2.25 W, the fitted nonlinear absorption coefficient…
2025/03/19 10:27
04 Theoretical study of thermal properties The above experiment shows that the BBO crystal (www.wisoptic.com) generates serious heat in the process of frequency quadrupling. It is known that the energy band gap of the BBO crystal is 6.56 eV, while the single photon energy of 266 nm and 532 nm…
2025/03/06 15:30
03 Experimental results and analysisWhen the green light input power is lower than 4 W, the matching temperature of the BBO crystal has little effect on the output power of the quadrupled 266 nm laser, and when the optimal power of ultraviolet light output is achieved, the temperature offset ΔT of…
2025/02/24 10:48
03 Experimental results and analysisBy optimizing the cavity length parameters of Nd:YVO4 (www.wisoptic.com) laser under high-power pump injection, a 1064 nm high peak power narrow pulse laser output with an average power of 26 W, a repetition frequency of 20 kHz, and a single pulse width of 5 ns…
2025/01/30 03:16
Experimental SetupIn order to obtain a 266 nm deep ultraviolet laser with high efficiency and stable operation, this paper built an all-solid-state 266 nm deep ultraviolet laser generation device as shown in Figure 1, which consists of a cavity-dumped all-solid-state Nd:YVO4 laser, a double-…
2025/01/07 08:52