Cr:ZnSe – Chromium doped zinc selenide
Absorption range 1450 nm – 2100 nm | Emission range 1900 nm – 3300 nm
Cr:ZnSe (Chromium Zinc Selenide, Cr²⁺:ZnSe) exhibits a high absorption coefficient and can be efficiently pumped across a broad range of 1450–2100 nm from various sources. It can also be used as a passive Q-switch within this range.
Cr:ZnSe is tunable and operates across a wide lasing wavelength range from 1900 nm to 3300 nm. Its primary disadvantage is the strong thermal lensing effect, which imposes power limitations.
Unlike the commonly available poly-crystalline form, 3photon Cr:ZnSe is mono-crystalline.
- Features
- Applications
- Growing
- High absorption coefficient
- Cubic structure
- Sizes up to 40 x 40 x 50 mm
- Emission range: 1.9–3.3 µm
- Gain bandwidth: >500 nm
- Excited-state lifetime at 300 K: ~5.5 µs
- Performs efficiently at room temperature
- Available dopant concentration densities up to 10²⁰ cm⁻³
- Gain material for compact laser systems
- Passive Q-switch for 1450–2100 nm lasers
- Pump source for mid-infrared (MIR) optical parametric oscillators (OPOs)
- Spectroscopy
- Infrared (IR) missile countermeasure systems (ship- and aircraft-based)
- Free-space communications
- Gas tracing and analysis
- Chemical warfare detection
- Non-invasive medical diagnostics
- Medical surgeries
- Cavity ring-down (CRD) spectroscopy
The most common Cr:ZnSe growing technology in the market is Chemical Vapor Deposition (CVD).
However, 3photon Cr:ZnSe is grown using alternative methods to produce single-crystal material.
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