Multi-mode absorption spectroscopy of ammonia and methane at 3.3μm has been demonstrated using a source of multi-mode mid-infrared radiation based on difference frequency generation. Multi-mode radiation at 1.5
The generation of tunable narrow-band mid-infrared light by difference-frequency mixing of two kinds of continuous-wave ring-laser radiation in potassium titanyl phosphate is described. The system produces infrared powers of ∼20 µW of difference-frequency light continuously tunable from 1.05 to...
Nonlinear Group IV photonics based on silicon and germanium: from near-infrared to mid-infrared Group IV photonics hold great potential for nonlinear applications in the near- and mid-infrared (IR) wavelength ranges, exhibiting strong nonlinearities i... L Zhang,AM Agarwal,LC Kimerling,... - 《...
The energies of fundamental modes of atomic vibrations in molecules correspond to mid-infrared (mid-IR) frequencies in the range between several hundreds and several thousands of inverse centimeters, which are often referred to as the molecular fingerprint region (usually located in the wavenumber rang...
This indicator is based on the reflectance of differential which trees, shrubs and plants exhibit for various parts of the radiation spectrum of solar and is calculated by the difference between the near-infrared and visible (red) b ands36, 37. NDVI values range between − 1.0 and +...
Some of the smaller sections of the IR radiation band include near-infrared, short wavelength-infrared, mid-wavelength-infrared, long wavelength-infrared, and far-infrared radiation. However, we can divide the band of infrared radiation in the electromagnetic spectrum into three major parts as IR-...
-infrared, mid-wavelength-infrared, long wavelength-infrared, and far-infrared radiation. However, we can divide the band of infrared radiation in the electromagnetic spectrum into three major parts: IR-A, IR-B, and IR-C. The bands can also be known as near-IR, mid-IR, and far-IR....
Therefore, if we continued to increase the power of the laser irradiating the sample, the temperature at the heterojunction would have a large space to increase. The corresponding relationship between the photograph (lower inset) and the infrared photograph of the actual sample is shown in Fig.1...
In the mid-IR spectral region between 3 micrometers and 25 micrometers lead salt diode lasers are the most common light sources for high-resolution spectroscopy. Other light sources as CO-, CO 2 -lasers or sideband-lasers are expensive, non- portable and poorly tunable. To overcome the cryog...
We describe tunable 5–12-μm mid-infrared generation in single-crystal silver gallium sulfide (AgGaS2), from nonlinear optical difference-frequency generation. Signal and idler waves obtained from a Nd:YAG laser–pumped LiNbO3 optical parametric oscillator (OPO) were mixed in AgGaS2 crystal to ...