{"title":"Improving Combustion with Laser Diagnostics","authors":"P. Andresen","doi":"10.1364/msslg.1995.ssab1","DOIUrl":"https://doi.org/10.1364/msslg.1995.ssab1","url":null,"abstract":"Modern laser spectroscopic methods allow the simultaneous measurement of multiple species concentrations as well as temperature, pressure, and flow velocities. Such methods are applied to technically applied combustion systems like furnaces, internal combustion engines, jet engines, or wind tunnels.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"379 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116477016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Two-Photon Time-of-flight Spectra of Rare Gas Excimers.","authors":"R. Lipson, S. Dimov","doi":"10.1364/msslg.1995.sfa5","DOIUrl":"https://doi.org/10.1364/msslg.1995.sfa5","url":null,"abstract":"The spectroscopy of the rare gas excimers has been a subject of interest for many years, primarily because the dimers are recognized media for vacuum ultraviolet lasers. Lasing originates from electronically excited ungerade states and terminates on the repulsive wall of the gerade ground state potential energy curve. Excited gerade levels act as storage reservoirs from which ionization can occur, thereby reducing the gain of the laser1. There has also been effort in rationalizing the collisional and radiative relaxation pathways among gerade dimer excited states by considering the shapes of the molecular potential energy curves, and the numerous crossings between them. However, in many instances the potentials used have been model potentials, and not those derived from detailed spectroscopic analyses2.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124903251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vibrational Dynamics in Liquids and Glasses: Picosecond Infrared Vibrational Photon Echoes and Other IR Experiments","authors":"M. Fayer","doi":"10.1364/msslg.1995.stha1","DOIUrl":"https://doi.org/10.1364/msslg.1995.stha1","url":null,"abstract":"The first vibrational photon echo experiments conducted in the liquid and solid phases [1,2] are used to examine the vibrational dynamics of solute molecules in liquids and glasses. . These experiments are performed using the Stanford superconducting linac pumped free electron laser which provides a source of tunable ~0.7 psec IR pulses. The psec IR vibrational photon echo experiment directly examines the interactions of a particular vibration with phonons and other vibrational modes of the system. In an IR vibrational echo experiment, the laser is tuned to the vibration of interest. Two pulses, one delayed in time, excite the sample. The echo is a third pulse of light that emerges from the sample in a unique direction. The intensity of the echo pulse is measured as a function of the delay between the two excitation pulses. The decay of the echo is a direct measure of the homogeneous dephasing of the vibration. In condensed matter systems, vibrational lines are generally inhomogeneously broadened. Therefore, taking a spectrum does not provide the dynamical information that is available from analysis of the homogeneous spectrum. The echo decay is the Fourier transform of the homogeneous vibrational line. The echo pulse sequence removes inhomogeneous broadening and permits the dynamical information that is contained in the homogeneous line to be obtained.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125998146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}