Solid-state Room Temperature MIR Lasers - CdMnTe Laser Materials
Brimrose Technology has successfully demonstrated a novel room temperature operated, miniature, tunable, all solid-state mid-infrared laser. The pulsed laser employs Chromium Doped Cd1-X
Te (x=45%) and Cobalt Doped Cd1-X
Te as the lasing materials that can be used to produce high power pulsed and continuous wave (CW) laser radiation.
Previously, ZnS and ZnSe were used as host materials for chromium to produce mid-infrared (MIR) lasing. Compared to these materials, large diameter CdMnTe is easier to grow (using the Bridgman technique) and can be made more homogeneous. During this R&D work, we have produced II-IV solid-state laser samples with adequate chromium absorptions and transmission (63%) in the lasing wavelength range of 2.1μm-3.5μm as well as high luminescence lifetimes. The lifetime of 4.9μs is the highest value of lifetime we have observed so far in CdMnTeCr+2
(45%) crystals. Alslo, we have developed an improved laser design in an effort to overcome the poor thermal conductivity and large temperature dependence of the refractive index (dn/dT) typical of II-VI semiconductor materials. For more info, please contact us
Features of the CdMnTe MIR Laser Materials:
- Room Temperature Operation
- Mid-Infrared Lasing Wavelengths
- Solid-state Laser Materials
- Easier to Grow with the Bridgman Technique
- Reasonable Homogeneity of Chromium Concentration across The CdMnTe Crystal
- Adequate Chromium Absorption (≥ 8cm-1)
- Broad Emission Spectrum - compared to Cr2+:ZnSe, the red-shifted emission band provides the possibility of an extended tuning range to nearly 3.5μm.
- High Luminescence Lifetimes (4.9μs) - the highest value of lifetime we have observed so far in CdMnTeCr+2(45%) crystals.
Military and Civilian Applications:
Solid-state laser sources emitting in a mid-infrared (MIR) spectral range are of great importance in a variety of military as well as civilian applications.
- Infrared Countermeasures
- Mid-IR Spectroscopy
- Remote Sensing
- Improvised Explosive Device (IED) Detection
- Medicine: Ophthalmology, Dentistry, Dermatology
- Active / Hyperspectral Imaging
- Mid-IR Room Temperature Power Limiting
- Pollution Monitoring
- Measurement of Atmospheric Aerosols, Molecular Species and Meteorological Parameters
In addition to applications in its fundamental tuning band, the room temperature Mid-Infrared laser could replace Nd:YAG as a diode-pumped laser source for powering other optical parametric oscillator (OPO) or Raman lasers to reach other wavelengths in the mid-infrared. Currently, very few solid-state lasers can reach these more distant regions.