WebFe:ZnSe or Iron(Ferrum) doped Zinc Selenide (Fe 2+:ZnSe) is arguably one of the most effective crystals used to design lasers in middle (thermal) infrared. As it’s cousin Cr:ZnSe, this crystal exhibits high absorption coefficient which allows efficient pumping. That can be done in range of 2.8 – 4.4 μm, with pumping peak at ~3 μm. WebOct 1, 2024 · The Cr:ZnSe polycrystal is secured on a copper heat sink which is held at a temperature of 20°C using a Peltier-electric cooler in which the heat is dissipated by water cooling. The pump source is a linearly polarized CW 1.94 μ m wavelength Tm:fibre laser (IPG Photonics, TLR-LP-20) with maximum output power of 20 W.
Cr:ZnSe Crystals Manufacture and Preocessing - Laser Crylink
Figure 2a shows the resulting input–output energy dependence at the idler wavelength of 9.0 µm together with the idler beam profile measured at 15 mJ pump energy. The idler pulse energy was detected shortly after the oscillation threshold of the ET-Cr:ZnSe laser (λs = 2.60 µm) and found to nonlinearly … See more Figure 3a shows the experimental result of the electronic tuning of the signal wavelength by feeding the RFs to the AOTF with a step size of 0.004 MHz (i.e., Δλs~ 0.35 nm) in the 35 and 45 MHz range. The pulse … See more It is possible to expand the mid-IR scanning range by combining the electronic wavelength tuning with a slight angle adjustment (Δθ < 0.5°) of the nonlinear crystal … See more WebCr 2+ ions are mostly used in zinc chalcogenides such as Cr 2+:ZnS, Cr 2+:ZnSe, Cr 2+:ZnS x Se 1−x, and Cr 2+:CdSe. Lasers based on these crystals can emit roughly between 1.9 and 3.5 μm and are typically pumped around 1.5–1.9 μm. black ships before troy chapter 3 summary
Zinc selenide - Wikipedia
WebCr: ZnSe laser crystal has the advantages of normally no excited state absorption and upper-level conversion, an extremely broad absorption band and large emission cross-section, superb fluorescence quantum efficiency at room temperature and extra broad emission width as well as good chemical and mechanical properties, which make it … WebCr:ZnSe – Chromium zinc selenide (Cr 2+ :ZnSe) exhibits high absorption coefficient and can be very efficiently pumped over broad 1450-2100 nm range of various sources or used as passive Q-switch in this range. Cr:ZnSe is tunable and it lases at wide wavelength range from 1900 nm to 3300 nm. WebOct 1, 2024 · The Cr:ZnSe polycrystal is secured on a copper heat sink which is held at a temperature of 20°C using a Peltier-electric cooler in which the heat is dissipated by … black ships before troy chapter 9