Tunable CW Solid-State Mid-IR Cr2+:CdSe Single Crystal Laser with Diode Laser Array Pumping

Continuous-wave broadly tunable diode laser array-pumped mid-infrared Cr2+:CdSe laser

“…Figure 1 (Setup I) shows the experimental setup of the Cr 2+ :CdSe single-crystal laser [41]. The Cr 2+ :CdSe crystal, with a Cr 2+ concentration of 1.1•10 18 cm −3 , had a cross-section of 1.5 mm × 5 mm and a length of 4.9 mm.…”

Thermo-optical and lasing characteristics of Cr^2+-doped CdSe single crystal as tunable coherent source in the mid-infrared

“…Among the different chalcogenide crystals, Cr 2+ :CdSe is a promising candidate, as its vibronic emission covers the 2.2-3.6 μm spectral range [5][6][7][8], which overlaps the fundamental vibrational transitions of hydrocarbons, water, and other relevant chemical and biological molecules. After the first laser actions in Cr:CdSe crystal [6,7], subsequent demonstrations proved excellent laser efficiencies and wide wavelength tunability both in continuous wave (CW) [9,10] and in gainswitching regimes, using different pump sources such as Tm-doped crystal lasers, diode lasers, and Tm-fiber lasers [9][10][11][12][13][14][15]. However, attempts to develop Cr 2+ :CdSe lasers with higher output power levels have been hampered by the strong sensitivity of CdSe crystal to thermo-optical effects, such as thermal lensing and mode wavefront distortion.…”

Application of the methane saturated dispersion resonance near 2.36μm over the temperature range of 77–300 K for optical frequency standards

“…To date, 10 much research has considered the methane P(7) line of the ν 3 band parameters at 3.39 µm [17,18]; however there are a number of lines in the mid-IR region that are free from magnetic hyperfine structures that have better prospects for use in laser frequency stabilization. The development of cw tunable solidstate lasers based on crystals of A 2 B 6 compounds doped with divalent ions 15 of transition metals [19,20,21] solved the problem of choosing appropriate lines [22,23,24]. The lack of detailed information regarding the line positions, the line intensities and their temperature dependencies, and the linewidths has often hindered the further development of lasers with high frequency stability.…”