Flame thermometry using laser-induced-grating spectroscopy of nitric oxide [0.03%]
基于激光诱导 grating 的 NO 光谱的火焰温度测量技术
Andrew Luers,Anna-Lena Salhlberg,Simone Hochgreb et al.
Andrew Luers et al.
A systematic study of laser-induced thermal-grating scattering (LITGS) using nitric oxide as an absorbing species is presented as a means of thermometry in air-fed combustion. The relative contributions to the scattered signal from degenera...
Dispersive white light continuum single Z-scan for rapid determination of degenerate two-photon absorption spectra [0.03%]
用于快速确定退化两光子吸收光谱的发散白光连续Z扫描技术
Aliasghar Ajami,Wolfgang Husinsky,Aleksandr Ovsianikov et al.
Aliasghar Ajami et al.
We present an experimental technique to determine the degenerate two-photon absorption (2PA) spectra by performing a single Z-scan using a high-spectral-irradiance white light continuum (WLC) generated by a hollow core fiber. The hollow fib...
Kana Iwakuni,Gil Porat,Thinh Q Bui et al.
Kana Iwakuni et al.
Long-wavelength mid-infrared (MIR) frequency combs with high power and flexible tunability are highly desired for molecular spectroscopy, including investigation of large molecules such as C60. We present a high power, phase-stabilized freq...
Highly efficient frequency doubling and quadrupling of a short-pulsed thulium fiber laser [0.03%]
高效产生THz的短脉冲铥纤维激光频率倍增和四重频效应研究
Lin Xu,Sijing Liang,Qiang Fu et al.
Lin Xu et al.
We report the second harmonic generation and fourth harmonic generation of the output from a short-pulsed (~ 80 ps) thulium-doped fiber laser, generating 976 and 488 nm wavelengths with high efficiency. With a narrow-linewidth (0.5 nm) pump...
Ben Henderson,Amir Khodabakhsh,Markus Metsälä et al.
Ben Henderson et al.
Detection and analysis of volatile compounds in exhaled breath represents an attractive tool for monitoring the metabolic status of a patient and disease diagnosis, since it is non-invasive and fast. Numerous studies have already demonstrat...
Are absorption and spontaneous or stimulated emission inverse processes? The answer is subtle! [0.03%]
吸收与自发辐射或受激辐射是不是逆过程？答案微妙！
Markus Pollnau
Markus Pollnau
It is generally believed that absorption and stimulated emission are inverse processes, as both are driven by an external field, their strength is quantified by the same Einstein B coefficient, and they occur with a defined phase, opposite ...
Optical remote sensing for monitoring flying mosquitoes, gender identification and discussion on species identification [0.03%]
光学遥感在监测飞行蚊虫、性别识别及物种识别中的应用与讨论
Adrien P Genoud,Roman Basistyy,Gregory M Williams et al.
Adrien P Genoud et al.
Mosquito-borne diseases are a major challenge for Human health as they affect nearly 700 million people every year and result in over 1 million deaths. Reliable information on the evolution of population and spatial distribution of key inse...
Jonas Rodewald,Philipp Haslinger,Nadine Dörre et al.
Jonas Rodewald et al.
We present matter-wave interferometry as a tool to advance spectroscopy for a wide class of nanoparticles, clusters and molecules. The high sensitivity of de Broglie interference fringes to external perturbations enables measurements in the...
Pulsed Rydberg four-wave mixing with motion-induced dephasing in a thermal vapor [0.03%]
热蒸气中运动引起的相位弛豫的脉冲Rydberg四波混频效应
Yi-Hsin Chen,Fabian Ripka,Robert Löw et al.
Yi-Hsin Chen et al.
We report on time-resolved pulsed four-wave mixing (FWM) signals in a thermal Rubidium vapor involving a Rydberg state. We observe FWM signals with dephasing times up to 7 ns, strongly dependent on the excitation bandwidth to the Rydberg st...
Autonomous field measurements of CO2 in the atmospheric column with the miniaturized laser heterodyne radiometer (Mini-LHR) [0.03%]
采用微型激光外差辐射计（Mini-LHR）进行大气柱CO2的自主现场测量
H R Melroy,E L Wilson,G B Clarke et al.
H R Melroy et al.
We present column CO2 measurements taken by the passive miniaturized laser heterodyne radiometer (Mini-LHR) at 1611.51 nm at the Mauna Loa Observatory in Hawaii. The Mini-LHR was operated autonomously, during the month of May 2013 at this s...