Phase-stable, multi-µJ femtosecond pulses from a repetition-rate tunable Ti:Sa-oscillator-seeded Yb-fiber amplifier [0.03%]
具有可调谐重复频率的Ti:Sapphire振荡器种子Yb光纤放大器产生的飞秒脉冲列
T Saule,S Holzberger,O De Vries et al.
T Saule et al.
We present a high-power, MHz-repetition-rate, phase-stable femtosecond laser system based on a phase-stabilized Ti:Sa oscillator and a multi-stage Yb-fiber chirped-pulse power amplifier. A 10-nm band around 1030 nm is split from the 7-fs os...
Atomic "bomb testing": the Elitzur-Vaidman experiment violates the Leggett-Garg inequality [0.03%]
原子"爆炸试验"：Elitzur-Vaidman实验违背Leggett-Garg不等式
Carsten Robens,Wolfgang Alt,Clive Emary et al.
Carsten Robens et al.
Elitzur and Vaidman have proposed a measurement scheme that, based on the quantum superposition principle, allows one to detect the presence of an object-in a dramatic scenario, a bomb-without interacting with it. It was pointed out by Ghir...
Andreas Barg,Yeghishe Tsaturyan,Erik Belhage et al.
Andreas Barg et al.
We discuss several techniques based on laser-driven interferometers and cavities to measure nanomechanical motion. With increasing complexity, they achieve sensitivities reaching from thermal displacement amplitudes, typically at the picome...
C R Smith,S J Beecher,J I Mackenzie et al.
C R Smith et al.
The use of an Yb:YAG thin-slab architecture for amplification of a radially polarised beam at 1030 nm is investigated and shown to be a promising route for power scaling. The detrimental impact of the Gouy phase shift on radial polarisation...
Polarisation-preserving photon frequency conversion from a trapped-ion-compatible wavelength to the telecom C-band [0.03%]
用于离子阱的光频转换至电信C带保持偏振不变的单光子频率上转换
V Krutyanskiy,M Meraner,J Schupp et al.
V Krutyanskiy et al.
We demonstrate polarisation-preserving frequency conversion of single-photon-level light at 854 nm, resonant with a trapped-ion transition and qubit, to the 1550-nm telecom C band. A total photon in / fiber-coupled photon out efficiency of ...
Diode laser-based thermometry using two-line atomic fluorescence of indium and gallium [0.03%]
基于半导体激光器的两条原子荧光测温技术
Jesper Borggren,Wubin Weng,Ali Hosseinnia et al.
Jesper Borggren et al.
A robust and relatively compact calibration-free thermometric technique using diode lasers two-line atomic fluorescence (TLAF) for reactive flows at atmospheric pressures is investigated. TLAF temperature measurements were conducted using i...
L Cini,J I Mackenzie
L Cini
Fundamentally power-limited by thermal effects, the design challenge for end-pumped "bulk" solid-state lasers depends upon knowledge of the temperature gradients within the gain medium. We have developed analytical expressions that can be u...
Mid-infrared sensing of CO at saturated absorption conditions using intracavity quartz-enhanced photoacoustic spectroscopy [0.03%]
基于石英增强光声光谱的饱和吸收条件下的CO气体中红外检测研究
Jakob Hayden,Bettina Baumgartner,Johannes P Waclawek et al.
Jakob Hayden et al.
The sensitivity of quartz-enhanced photoacoustic spectroscopy (QEPAS) can be drastically increased using the power enhancement in high-finesse cavities. Here, low noise resonant power enhancement to 6.3 W was achieved in a linear Brewster w...
A portable miniaturized laser heterodyne radiometer (mini‑LHR) for remote measurements of column CH4 and CO2 [0.03%]
一种便携式小型激光heterodyne辐射计（Mini-LHR），用于远程测量CH4和CO2的柱总量
E L Wilson,A J DiGregorio,G Villanueva et al.
E L Wilson et al.
We present the design of a portable version of our miniaturized laser heterodyne radiometer (mini-LHR) that simultaneously measures methane (CH4) and carbon dioxide (CO2) in the atmospheric column. The mini-LHR fits on a backpack frame, ope...
Fiber laser-driven gas plasma-based generation of THz radiation with 50-mW average power [0.03%]
基于光纤激光驱动的气体等离子体THz辐射源实现50毫瓦平均功率输出
Joachim Buldt,Michael Mueller,Henning Stark et al.
Joachim Buldt et al.
We present on THz generation in the two-color gas plasma scheme driven by a high-power, ultrafast fiber laser system. The applied scheme is a promising approach for scaling the THz average power but it has been limited so far by the driving...