Double-pass Co:CdTe mid-infrared laser amplifier

Turner, Eric J.; Evans, Jonathan W.; Harris, Thomas R.; McDaniel, Sean A.

doi:10.1364/ome.8.002948

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…In the previous two decades, vibronic lasers based on transition metal ions substitutionally incorporated into II–VI crystal hosts (most notably Cr:ZnSe and Fe:ZnSe) have become ubiquitous 1 – 6 Still, some of the fundamental interactions that influence the behavior of laser sources built from these materials are not widely appreciated. In this work, we draw attention to the sensitivity of the output characteristics of lasers made from these materials to the overall quality of the crystals used to construct them.…”

Section: Background and Theorymentioning

confidence: 99%

Crystal host engineering for transition metal lasers

et al. 2023

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Much progress has been made in the power and energy scaling of mid-infrared lasers based on transition metal ions, such as Cr 2þ , Co 2þ , and Fe 2þ , in zinc and cadmium chalcogenides. Still, the exploration of the physics of these devices is incomplete. In this work, we analyze absorption spectra collected from Fe 2þ ions in several binary, ternary, and quaternary host crystals at temperatures from a few degrees Kelvin to room temperature. We use the zero-phonon lines of the low-temperature spectra to calculate the value of the crystal field energy of Fe 2þ ions in these hosts. We plot these crystal field energies with respect to the anion-cation distance of the host crystal and show that their crystal field strengths deviate somewhat from the trend predicted by crystal field theory. We use a model which we previously developed to describe the upper state lifetime of Fe 2þ ions to predict the steady-state radiative efficiency of Fe:II-VI materials with respect to temperature. The impact of relative crystalline disorder on the output characteristics of lasers based on Cr:ZnS, Cr:ZnSe, Fe:ZnSe, and Fe:CdMnTe is explored. The effect of decreased long-range order of the host crystal is observed in the broadening of the absorption spectra of Fe 2þ -doped ternary and quaternary alloys, the broadening of the spectral linewidth of continuous-wave Fe:II-VI lasers, and a reduction in the portion of the Cr:ZnSe emission spectrum accessible for modelocked lasing. This survey provides a richer picture of the tradespaces that can be leveraged when producing laser devices based on transition metal chalcogenides. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 International License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Background and Theorymentioning

confidence: 99%

Crystal host engineering for transition metal lasers

et al. 2023

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“…Mid-infrared lasers play an indispensable role in many fields, such as space communication [1], medical applications [2], industrial processing [3], and military confrontation [4]. Different types of mid-infrared lasers have their advantages in performance, and the research generally focuses on developing lasers with higher power, higher efficiency, and even a wider spectral bandwidth [5][6][7][8][9]. The broadband mid-infrared laser can be absorbed by many gas molecules and has been used to monitor the concentration of various gas substances in the industry [10,11].…”

Section: Introductionmentioning

confidence: 99%

Broadband, Continuous-Wave, Mid-Infrared Generation Based on ASE Fiber Source

Wang

et al. 2022

Photonics

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The research reports broadband, continuous-wave (CW), mid-infrared generation based on an optical parametric oscillator (OPO), pumped by an amplified spontaneous emission (ASE) fiber source. The ASE fiber source has a ytterbium (Yb)-doped fiber master oscillator power amplifier (MOPA) structure. By injecting another fiber laser with high power and a narrow linewidth into the nonlinear crystal, the phase-matching difference frequency generation (DFG) can be realized at a low pumping threshold. It is shown that during the down-conversion of the ASE fiber source, the intracavity DFG can steadily and effectively generate a broadband mid-infrared laser, with a central wavelength of 3713 nm. The bandwidth of the mid-infrared laser is 122 nm. The pump power of 2 W generates a 0.238 W mid-infrared laser with a pump-idler conversion efficiency of 11.6%. It has tremendous application potential in the research of broadband CW mid-infrared lasers.

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