Efficient IR Fe:ZnSe laser continuously tunable in the spectral range from 3.77 to 4.40 μm

Akimov, V A; Воронов, А. А.; Козловский, В. И.; Korostelin, Yu. V.; Ландман, А. И.; Podmar’kov, Yu P; Фролов, М П

doi:10.1070/qe2004v034n10abeh002789

Cited by 57 publications

(18 citation statements)

References 1 publication

(4 reference statements)

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“…Index of refraction of this material was 2.6 for wavelength 4 μm. The room-temperature lifetime of the upper 5 T 2 level was measured to be about 355 ns [13]. …”

Section: Fe:znse Crystalmentioning

confidence: 99%

“…Since then, many other techniques for fabrication of the Fe 2+ :ZnSe active medium have been tried. The crystal was prepared from a vapour phase [13] and with the cooling to liquid nitrogen temperature the laser produced 130 mJ output energy (slope efficiency in respect to the absorbed energy was 40%). The first room-temperature-Fe 2+ :ZnSestimulated emission with the maximum output energy 1 μJ was obtained in 2005 [14] and the efficient roomtemperature-Fe 2+ :ZnSe-laser was working in 2006 [15].…”

Section: Introductionmentioning

confidence: 99%

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Bulk Fe:ZnSe laser gain-switched by the Q-switched Er:YAG laser

et al. 2009

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Fe:ZnSe is one of the most promising materials capable of generating broadly tunable laser radiation in the wavelength range from 3.5 to 5 μm. The aim of the work was to test laser properties of the Bridgman-method-grown Fe 2+ :ZnSe crystal activated through the synthesis process as an active medium coherently pumped with the Q-switched Er:YAG laser whose oscillation wavelength (2937 nm) corresponds to the maximum of the Fe 2+ :ZnSe absorption spectrum. The Er:YAG laser generated giant pulses with the duration 160 -200 ns and energy 20 -30 mJ. The repetition-rate was set to be 1 Hz. The oscillation properties, such as the pulse length, energy, and generated beam spatial structure, of the Bridgman-method-grown Fe 2+ :ZnSe crystal used as an active medium of Fe 2+ :ZnSe laser operated at room temperature were investigated. The maximal obtained output energy of room temperature Fe 2+ :ZnSe laser was 580 μJ for the absorbed energy of 5.3 mJ which corresponds to slope efficiency of 38%. The generated pulse waveform was found to follow that of the pump one.

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“…Index of refraction of this material was 2.6 for wavelength 4 μm. The room-temperature lifetime of the upper 5 T 2 level was measured to be about 355 ns [13]. …”

Section: Fe:znse Crystalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bulk Fe:ZnSe laser gain-switched by the Q-switched Er:YAG laser

et al. 2009

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“…Materials as Cr:ZnSe, Cr:ZnS, and Cr:CdSe were proved to be efficient active media for tunable lasers in the range of 2.0 -3.5 μm [8][9][10][11][12][13][14][15][16][17] . For 4 -5 μm region, the divalent iron ion (Fe 2+ ) in the ZnSe matrix was investigated and found as good material for development of compact laser system [18][19][20][21][22][23] . Fe:ZnSe laser can generate the radiation from 3.5 µm (at 80) up to 4.5 µm (at room temperature).…”

Section: Introductionmentioning

confidence: 99%

Gain-switched Fe:ZnMgSe laser oscillation under cryogenic temperature

et al. 2014

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The spectroscopic and laser properties of bulk Bridgman-grown Fe,Cr:Zn 1-x Mg x Se single crystals with the various concentrations of Mg (x=0.19; x=0.27; x=0.38) were investigated in the wide temperature range. The pumping was provided by a 2.94 μm Q-switched Er:YAG laser with a maximal energy of 15 mJ in 120 ns pulse, repetition rate 1 Hz. Q-switched operation was achieved by the Brewster angle cut LiNbO3 Pockels cell placed between the rear mirror and the Er:YAG laser active medium. The pump radiation was directed into the Fe:ZnMgSe crystal placed inside the LN cooled dewar. The 55 mm long plane-concave cavity was formed by a dichroic pumping mirror (T = 92 % @ 2.94 μm and R = 100 % @ 4 -5 μm) and a output coupler (R = 95 % @ 4.5 μm, r = 200 mm). The strong dependence of output pulse energy on temperature was observed for all samples. The maximum output Fe,Cr:Zn 1-x Mg x Se laser energy was 230 μJ and 180 μJ (for Mg concentration x=0.19 and x=0.38, respectively) for gain switched operation at 88 K. The central emission wavelength of ~ 4600 nm, ~ 4700 nm and ~ 4800 nm for Mg concentration x=0.19; x=0.27, and x=0.37, respectively at 88 K was obtained. The emission wavelength was found to increase up to ~ 4700 nm and ~ 4900 nm at 250 K for Mg concentration x=0.19 and x=0.38, respectively. This results show the possibility to obtain sufficiently longer oscillation wavelengths compared to previously studied Fe:ZnSe active medium especially at liquid nitrogen temperatures when pumping by free-running Er:YAG laser becomes possible. Fluorescence spectra and lifetimes of Fe 2+ ions in different Zn 1-x Mg x Se crystals in the range from 250 K down to 80 K were also measured.

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“…Since then, many other techniques for fabrication of the Fe 2+ :ZnSe active medium have been tried. The crystal was prepared from a vapor phase [13] and with the cooling to liquid nitrogen temperature the laser produced 130 mJ output energy (slope efficiency in respect to the absorbed energy was 40%). The first room-temperature-Fe 2+ :ZnSe-stimulated emission with the maximum output energy 1 μJ was obtained in 2005 [14] and the efficient room-temperature-Fe 2+ :ZnSe-laser emission was reached in 2006 [15].…”

Section: Introductionmentioning

confidence: 99%

Room-temperature lasing, gain-switched bulk, tunable Fe:ZnSe laser

et al. 2010

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The goal of this work was to design and investigate a gain switched, at room temperature lasing Fe:ZnSe laser. The active medium was a bulk, by Bridgman-technique grown Fe:ZnSe sample with the thickness 3.4 mm. The pumping was provided by electro-optically Q-switched Er:YAG laser with the oscillation wavelength 2.937 μm matching the local maximum of the Fe:ZnSe absorption. The Er:YAG Q-switched operation was obtained by the Brewster angle cut LiNbO 3 Pockels cell placed between the rear mirror and the laser active medium. No additional intracavity polarizers were used. The maximum pumping pulse energy and length was 15 mJ, and ~300 ns, respectively. This pulse-length is close to room-temperature measured lifetime of Fe 2+ ions in Fe:ZnSe crystal. The pump radiation was directed into the Fe:ZnSe crystal which was placed inside the cavity formed by dichroic pumping mirror (T HR =92% at 2.94 μm and R HR~1 00% for 3.5-5.2 μm) and optimal output coupler with the reflectance R OC =90% at 4.5 μm, radius of curvature r = -200 mm. The maximum obtained output Fe:ZnSe laser energy was 1.2 mJ, the generated output pulse duration on the wavelength 4.5 μm was 65 ns (FWHM). The output pulse profile was approximately Gaussian. The crystal showed rather high uniformity of oscillation properties throughout its volume. For the case of tuning the CaF 2 prism was implemented into the resonator. The tuning curve of generated Fe:ZnSe laser radiation covered the spectral range 3.9 -4.7 μm.

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Efficient IR Fe:ZnSe laser continuously tunable in the spectral range from 3.77 to 4.40 μm

Cited by 57 publications

References 1 publication

Bulk Fe:ZnSe laser gain-switched by the Q-switched Er:YAG laser

Bulk Fe:ZnSe laser gain-switched by the Q-switched Er:YAG laser

Gain-switched Fe:ZnMgSe laser oscillation under cryogenic temperature

Room-temperature lasing, gain-switched bulk, tunable Fe:ZnSe laser

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