WebThe lasers will be developed with the semiconductor quantum-cascade technology that will allow integration of tens of different lasers, each emitting at a range of discrete frequencies, on a single semiconductor chip for broad spectral coverage. WebMar 11, 2013 · We report on a set of high-sensitivity terahertz spectroscopy experiments making use of QCLs to detect rotational molecular transitions in the far-infrared. We demonstrate that using a compact and transportable cryogen-free setup, based on a quantum cascade laser in a closed-cycle Stirling cryostat, and pyroelectric detectors, a …
High-power portable terahertz laser systems Semantic Scholar
WebApr 8, 2024 · THz quantum-cascade lasers (QCLs) are important for high-resolution molecular spectroscopy (for simplicity, we will use the term “molecular” instead of “molecular and atomic”), because they are powerful, narrow band sources and their spectral brightness is very high, typically in the order of mW per MHz. WebOct 23, 2013 · THz quantum cascade lasers (QCLs) are promising candidates for such applications, since they are electrically driven and currently cover a frequency range from … how big is ruby falls
Researchers develop a high-power, portable terahertz laser
WebNov 2, 2024 · Terahertz (THz) frequencies remain among the least utilized in the electromagnetic spectrum, largely due to the lack of powerful and compact sources. The invention of THz quantum cascade lasers (QCLs) was a major breakthrough to bridge the so-called ‘THz gap’ between semiconductor electronic and photonic sources. However, … WebAug 29, 2013 · Quantum cascade lasers are compact devices based on mature compound semiconductors such as GaAs that take advantage of highly developed optoelectronic fabrication techniques to integrate linear... WebNov 2, 2024 · Terahertz quantum cascade lasers, tiny chip-embedded semiconductor laser devices, were first invented in 2002, but adapting them to operate far above 200 K proved … how big is rose bowl