Speed of Light from Direct Frequency and Wavelength Measurements of the Methane-Stabilized Laser The frequency and wavelength of the methane-stabilized laser at 3.39 μm were directly measured against the respective primary standards. With infrared fre... KM Evenson,JS Wells,FR Petersen,... - 《...
we measured light intensity produced by our system. Then, we performed visual stimulation to excite cortical cells (via visual pathway) using 620-nm or 730-nm LED light source mounted on a perforated aluminum plate that was placed on the top of the mouse cage. Arduino UNO was used to gener...
parameter) to the frequency noise at “high” frequencies. This is due to an order of magnitude lowering of the relaxation resonance frequency of the laser. Here, we show that the practical elimination of this coupling enables yet another order of magnitude reduction of the frequency noise at h...
What is the phase speed of the wave? 8. A jet liner is flying level at a speed of 350kmh-1 when it encounters a gravity wave. If the period of vertical oscillations of the plane is 2 s, what is the wavelength of the wave? 9. If a wave has λx=150km and λz=6km, what ...
“IR” section). The vibrationally excited state is then excited to a virtual state by a fixed wavelength visible laser, corresponding to the same process as exploited in Raman spectroscopy (“Raman” section). If the tunable IR laser is tuned to a frequency where a transition is permitted, ...
Generation of Continuous-Wave Blue Light by Sum-Frequency Mixing of Diode Pumped Dual-Wavelength Lasers 来自 Semantic Scholar 喜欢 0 阅读量: 44 作者:E. Herault,F. Balembois,P. Georges 摘要: Simultaneous emissions were demonstrated with a Nd:GdVO/sub 4/ crystal (912-nm and 1063-nm) and ...
A single-frequency narrow linewidth fiber laser with linear laser cavity is presented and demonstrated experimentally.The moving refractive index grating and gain grating,which are induced by interfering between the feedback light from the part of output light and the lasing light in intra-cavity,are...
Phase-Frequency Detection for Instantaneous Signal Wavelength After using the combined solution between the strict solution of phase difference DF based on short-baseline and Doppler shift equation, an expression of D... YU Tao - 《Modern Navigation》 被引量: 0发表: 2016年 Electric quantity measuri...
These second-order coupled equation can be approximated to first-order linearized wave equations using the WKB approximation, as the spatial variation of the plasma frequency occurs on a much larger scale than the wavelength of DPDM. Consequently, we have...
wherengis the refractive index,Lis the length (double transit of gauge length when DAS is the strain-meter),ξis a scale factor due to photo-elastic effect,λis the wavelength of light in the free space (1550 nm in our case). Gauge length in typical DAS interrogators is in the order...