The device has a diode (3) emitting laser radiation (6) in the frequency range of 1.8-2.1 micrometer. A current generator (2) generates a step current at an adjustable frequency. An amplification unit (4) amplifies the laser radiation, and the frequency of the amplified radiation is ...
英[ˈinfrəˈred ˈfri:kwənsi] 美[ˌɪnfrəˈrɛd ˈfrikwənsi] 释义 [医]红外频率 英英释义 Noun 1. the infrared part of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared"...
Near-IR.The near-IR band contains the range of wavelengths closest to the red end of the visible light spectrum. Near-IR consists of wavelengths that range from 700 nanometers (nm) to 1,300 nm, or 0.7 microns to 1.3 microns. Its frequency ranges from about 215 THz to 400 THz. This ...
1.the part of the invisible spectrum that is contiguous to the red end of the visible spectrum and that comprises electromagnetic radiation of wavelengths from 800 nm to 1 mm. adj. 2.of, pertaining to, or using the infrared or its component rays:infrared radiation.Compareultraviolet. ...
IR Frequency Range and Spectrum Presentation Infrared radiation spans a section of the electromagnetic spectrum having wavenumbers from roughly –1 13,000 to 10 cm , or wavelengths from 0.78 to 1000 µm. It is bound by the red end of the visible region at high frequencies and the microwave...
What Is Infrared Ray ?Infrared is an energy similar to visible light, but with a longer wavelength. Infrared energy is invisible to the human eye, however, while visible light energy is emitted by objects only at a very high temperature, infrared energy is emitted by all objects ...
Infrared radiation(IR) is a form of electromagnetic waves from a heat source which requires no medium for its emission and located at the outer range of the visible red light. The infrared radiation wavelength varies from 0.75 to 1000 μm. IR can be divided into three different categories, ...
Frequency-Agile LIDAR Receiver for Chemical and Biological Agent Sensing Frequency agilityFar infrared radiationFabry perot interferometersBiological agent detectorsBandwidthCarbon dioxide lasersChemical agent detectors... Cosofret, B. R,Konen, I. M,Patel, A. H,... 被引量: 0发表: 2010年 加载更多研...
Transmission and reflection measurements over the frequency range 17–200 cm −1 were made on GaAs with electron concentrations of 1·0 and 4·9 × 10 16 cm −3. The plasma frequencies of the samples fall within the measurement range. When values of the free carrier absorption coefficient...
Theoretical and experimental studies have highlighted the importance of using laser sources with specific wavelengths to enhance the power conversion efficiency of terahertz radiation and enable long-range propagation in air. Improved schemes for controlling frequency mixing are projected to offer order-of-...