Topic
Transverse plane
About: Transverse plane is a research topic. Over the lifetime, 17069 publications have been published within this topic receiving 194059 citations. The topic is also known as: axial plane.
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TL;DR: In this paper, the authors directly observed longitudinal electromagnetic fields in focused freely propagating terahertz beams of radial and linear polarization and showed that the longitudinal fields are phase shifted by a value of pi/2 with respect to the transverse field components.
Abstract: We directly observe longitudinal electromagnetic fields in focused freely propagating terahertz beams of radial and linear polarization. In accordance with theory, the longitudinal fields are phase shifted by a value of pi/2 with respect to the transverse field components. This behavior is found for all frequency components of single cycle THz radiation pulses. Additionally we show that the longitudinal field of a radially polarized THz beam has a smaller spot size as compared to the transverse field of a linearly polarized beam, that is focused under the same conditions.
46 citations
TL;DR: In this paper, a simple transverse radial boost scenario coupled with PYTHIA events was used to illustrate the impact radial flow may have on two-and three-particle correlation functions measured in heavy-ion collisions.
46 citations
TL;DR: In this article, a rectangular combustor with acoustic forcing was used to study flame-acoustic interaction under injection conditions that are representative of liquid propellant rocket engines, and hot-fire tests using liquid oxygen and gaseous hydrogen were conducted at pressures of 40 and 60 bar, respectively.
Abstract: A rectangular combustor with acoustic forcing was used to study flame–acoustic interaction under injection conditions that are representative of liquid propellant rocket engines. Hot-fire tests using liquid oxygen and gaseous hydrogen were conducted at pressures of 40 and 60 bar, which are sub- and supercritical conditions, respectively, for oxygen. Examined samples of hydroxyl-radical emission imaging, collected using a high-speed camera during periods of forced acoustic resonance, showed significant response in the multi-injection element flame. Fluctuating acoustic pressure causes in-phase fluctuation of the emission intensity, producing response factor values of around 0.8. Transverse acoustic velocity causes shortening of the flame, concentrating heat release near the injection plane. The flame is also convectively displaced with transverse acoustic velocity, a process believed by many to be responsible for driving transverse mode high-frequency combustion instabilities. The analysis in this work was...
46 citations
TL;DR: In this paper, the transverse mode structure of a three-mirror cavity approach is modeled using gain saturation, carrier diffusion, and anti-guiding effects, and the near and far field distributions are calculated and compared to experimental results.
Abstract: Broad-area lasers (BALs) with external Fourier-optical cavities with spatial filter for transverse mode selection have been studied experimentally and theoretically. The transverse mode structure of BALs is modeled using a three mirror cavity approach. The model accounts for gain saturation, carrier diffusion, and anti-guiding effects. Near- and far-field distributions are calculated and compared to experimental results. Transverse mode selection is achieved for BALs with a residual front facet reflectivity of 10% at low pump currents. For BALs having a very low front facet reflectivity of 0.001%, transverse modes can be selectively excited up to pump currents more than 200% above laser threshold. Calculations show that BALs having a 0.001%-antireflection coating with an external Fourier-optical cavity high above threshold can operate in a self-Q-switched-like mode with pulse durations of 2-4 ns and repetition rates of 100-200 MHz. Experimental results obtained with a hybrid integrated-optical external cavity for transverse mode selection are also presented.
46 citations
Patent•
17 Oct 2000
TL;DR: In this paper, an oblique enlargement projection from the primary image plane 11 to the secondary image plane 12 and equipped with >= 2 lens groups which are eccentric with each other is presented.
Abstract: PROBLEM TO BE SOLVED: To obtain the oblique projection optical system with a wide field angle and high magnification which has its lens system and optical system reduced in overall length while having a sufficient oblique projection angle by eliminating intermediate real-image formation between a primary image plane and a secondary image plane and specifying the angle between the primary and secondary image planes and the angles between the normals of the secondary and primary image planes and the image plane center light beam. SOLUTION: This is an oblique optical system which perform oblique enlargement projection from the primary image plane 11 to the secondary image plane 12 and equipped with >=2 lens groups which are eccentric with each other and no intermediate real image is formed between the primary image plane 11 and secondary image plane 12; when the light beam connecting the center of the primary image plane 11 and the center of the secondary image plane 12 is the image plane center light beam, conditional expressions 15 deg.<θoi<40 deg., 20 deg.<θo<50 deg., and 0 deg.<=θi<5 deg. are satisfied. Here, θoi is the angle between the primary image plane 11 and secondary image plane 12, θo is the angle between the normal of the secondary image plane and the image plane center light beam, and θi is the angle between the normal of the primary image plane 11 and the image plane center light beam.
46 citations