Jul 31, 2015 the spatially varying intensity in a standing wave resonator leads to spatial hole burning in the gain medium of a laser. Spectral hole burning shb phenomenon in optical networks. Mechanical spectral hole burning how is mechanical spectral. One and twostep photongated shb processes induced by laser pulses in two, three and. Spectral hole burning spectroscopy of molecular electronic transitions in amorphous solids by inja lee a dissertation submitted to the graduate faculty in partial fulfillment of the. The essence of spectral holeburning hb is that the transition energy of the guest molecule embedded in a crystalline or glassy solid matrix shifts after absorption. Spectral hole burning in erbiumdoped fiber amplifiers. The positions of side holes and antiholes, furthermore, suggest that the hole burning mechanisms in b820 and b777 are similar, although their hb efficiencies. Let us consider the absorption of light by one single molecule embedded in an optically transparent solid.
Spectral hole burning an overview sciencedirect topics. The spectral holes are narrow homogeneous linewidth of 63 khz at. Apr, 2011 b explain the phenomenon of spectral hole burning. Recognition and use in borehole image interpretation mohammed alkhabbaz2, hanan abuhebail1, mahmood akbar2, badruzzaman khan1, salem alsabea1, mona rashaid1, robert laronga2, alexander aviantara2, sandeep chakravorty2, and rohoullah dashti1. Pdf the exponential growth of the optics telecommunication lines is due, amongst other things, to two technologies. Information and translations of isospectral in the most comprehensive dictionary definitions resource on the web. At room temperature, the lines are homogeneously broadened by phonons with typical homogeneous linewidths h 60 ghz 2 30 cm1. The spectral hole burning effects on the gain and ase spectrum in the shorter wavelength region 4 indicate that certain minimum wavelength spacing is required between sources.
Pdf a model calculation is presented that describes the features of spectral hole burning measurements performed under conditions of femtosecond. Characterization and delineation of plumes, clouds, and fires. Spectral hole burning of model photosynthetic systems. Several commercial and environmental applications require the detection and quantification of gaseous plumes from airborne platforms. A new measurement technique for shb measurement is developed.
Burn depth estimation using thermal excitation and imaging. Spectral hole burning is a high resolution line narrowing spectroscopy. Holeburning spectroscopy on excitonically coupled pigments. Since the whole gain curve remains the same for higher values of the pump. A new theoreticalnumerical model of the spectral hole burning shb effect in erbiumdoped fiber amplifiers edfas is suggested. A model calculation is presented that describes the features of spectralhole burning measurements performed under conditions of femtosecond transient excitation and probing. Here, the principles of spectral hole burning hb and the experimental setup used in its continuous wave cw and timeresolved versions are described. Spectral hole burning as one of them additionally offers the potential for applications in high density optical data storage. Two approaches, one for discriminating features in a set of aviris scenes dominated by areas of smoke, plumes, clouds and burning grassland as well as scarred burned areas and another for identifying those features are presented here.
Suppression of spatial hole burning and pulse stabilization for actively modelocked quantum cascade lasers using quantum coherent absorption s. Temperature dependence of gated hole widths for holes of depth 50% burnt and read at the same temperature in the 7f0d2 transition. Department of physics, lund institute of technology, p. Burn depth estimation using thermal excitation and imaging fred m. An example of such solid could be a piece of plastic or polymer material, a chunk of a laser crystal or a piece of simple window glass. This presentation will demonstrate the suitability of borehole image and sonic logs for geological and geomechanical studies through an integrated workflow using examples from recently drilled wells. Spectral hole burning shb spectral hole burning shb is a major limitation of amplified wdm systems with high channel count. Pumpinduced changes in the spectrum of probe transmittance arise not only from changes in level population hole burning, but also from the presence of pump polarization during the probe, and from. Rp photonics encyclopedia spatial hole burning, shb, laser. Suppression of spatial hole burning and pulse stabilization. The shape and depth of the spectral hole are in accordance with the. By using an asd terraspec spectrometer we are able to measure 1500 2000 m of drill core per day 1 m intervals. Rareearthdoped materials with application to optical signal.
Although initial demonstrations of spectralholeburning laser. Platform 325mm x 400mm sample size capacity 100mm z axis travel maximum stage load capacity. We simulate this longitudinal mode competition in standing wave resonators of thindisk lasers. Application of spectral holeburning in combination with. Spectral hole burning spectroscopy of molecular electronic. The impact of chromatic aberration on the infrared. Understanding laser stabilization using spectral hole burning b. Theoretical description of laser stabilization using spectral hole burning it is our intention in this paper to maintain the physical understanding, and hence we will restrict ourselves to analytical derivations and make approximations, rather than numerical simulations, when the calculations become dif. Ask rp photonics for advice on details of spatial hole burning, e. Hole burning in the 7f0d1 transition was attempted at higher temperatures. Solid earth publishes original research articles on the broad field of solid earth geophysics, petrology, geochemistry, mineralogy, tectonophysics, natural hazards, and volcanology. Spectral hole burning is the frequencyselective bleaching of the absorption spectrum of a material, which leads to an increased transmission a spectral hole at the selected frequency. Several spectroscopic techniques make use of the nonlinear properties of solids in order to obtain high spectral resolution. In hb spectroscopy, the inhomogeneous ensemble of ppcs is excited with an energetically narrow laser.
Pdf ultrafast spectral hole burning reveals the distinct. Experiments are conducted to identify the particular mechanism of shb. Pdf eumelanin, the brownblack pigment found in organisms from bacteria to humans, dissipates solar energy and prevents photochemical damage. Nonspectral definition of nonspectral by merriamwebster. Pscomplex artifacts in resistivity and acoustic image data. Understanding laser stabilization using spectral hole burning. Souhaite, 1990, fracture apertures from electrical borehole scans. Holeburning effects in conventional and modified distributed feedback laser structures c.
Detection of burned forests in amazonia using the normalized burn ratio nbr and linear spectral mixture model from landsat 8 images. Complex artifacts in resistivity and acoustic image data. Jan 12, 2012 hi i am reading about spatial hole burning in the litterature, and i have come across two different explanations. A hole burnt at 3 k, burnt and scanned with a homemade wavelength nm temperature k fig. What is the spatial and spectral hole burning phenomena in solidstate laser. Scatteringbased hole burning mediated by localized surface. A computer simulation program is developed using this approach. Permission from ieee must be obtained for all other uses, in any current or future media, including reprintingrepublishing this material for advertising. Pdf dynamics of spectral hole burning researchgate. Scatteringbased hole burning mediated by localized surface plasmon resonance in photoreactive random media containing ag nanoparticles shunsuke murai,1,a yutaka fujimoto,1 koji iwata,1 koji fujita,1,2 and katsuhisa tanaka1.
Pdf gain spectral hole burning in erbium doped fibre amplifier. The products of the selective photobleaching are, in most cases, spectroscopically well separated from that of the original absorption friedrich and haarer 1984. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Spectral hole burning how is spectral hole burning. Pdf theory of twostep spectral hole burning by pulses. The impact of chromatic aberration on the infrared microspectral analysis of trace evidence brooke w. Photochemical spectral hole burning pcshb is a type of selective excitation spectral bleaching in which the optical species is photoreactive.
Spectral hole burning is the frequency selective bleaching of the absorption spectrum of a material, which leads to an. On the other hand, the width of the spectral hole burning effects toward the red end of the gain spectrum shows that the source spacing can be quite wide. Detection of burned forests in amazonia using the normalized. In all cases the spectral hole burning relies on three basic factors. Since the complexes in the sample are inhomogeneously. Unlike active lidar imaging in a dial system, the signal received by a passive sensor depends not only on the gas concentration pathlength, but the temperature contrast between the gas column and the background as well. There have recently been several studies of the performance. Spectral hole burning how is spectral hole burning abbreviated. Finnegan3 1national snowand ice data centernoaawestern water assessment, universityof colorado at boulder, boulder, co, usa. Evaluation of nonuniform wdm source spacing for edfa gain. Two basic requirements must be met for the phenomenon to be observed.
Menyuk1 1department of computer science and electrical engineering, university of maryland baltimore county. Pump wavelengthdependent spectralhole burning in edfas. Spectral hole burning and fluorescence line narrowing in. The spectral width of the burning laser is negligible small compared with the width of the zpl. This is the first fulllength book on persistent spectral holeburning. Holeburning effects in conventional and modified distributed. From borehole images to fracture permeability and fracturing. The spatial hole burning changes the gain of different longitudinal modes and can thus determine the optical spectrum of the laser. Nonspectral definition is not being in the spectrum. A method for quantification of gas plumes in thermal. Full refereed journal article pdf postscript references in the article citations to the article 8 citation history refereed citations to the article reads history translate this page. Wild journal of luminescence 45 1990 32022 northholland physical chemistry laboratory, swiss federal institute of technology, ethzentrum, ch8092 zurich, switzerland a laser induced grating technique holography has been developed to burn and to detect narrow persistent spectral holes.
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