Studies of Optical Spectral Holeburning using Raman Coherent Population Trapping

使用拉曼相干布居捕获的光谱烧孔研究

基本信息

  • 批准号:
    9421304
  • 负责人:
  • 金额:
    $ 21.77万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1996
  • 资助国家:
    美国
  • 起止时间:
    1996-08-01 至 2000-07-31
  • 项目状态:
    已结题

项目摘要

9421304 Kim In this proposal, optical spectral holeburning is considered with Raman coherent population trapping in a folded three level lambda system. This is a novel technique which allows storage (and retrieval) of optical data with potentially significant advantages over conventional schemes. Each data pulse is composed of the two optical frequencies corresponding to the two legs of the lambda transition. The information about the pulse amplitudes and separations are encoded in the spin-rather than optical-coherence. This coherence is created by a two-photon process, so that its amplitude is proportional to the product of the amplitudes of electric fields (i.e., geometric mean intensity) of the two frequencies, and oscillates in phase with the beat frequency. Thus, both amplitude and phase sensitive optical data, encoded in the geometric mean intensity and the phase of the beat frequency, respectively, can be stored. This scheme of data storage and retrieval may have significant advantages over existing techniques. For example, the write window is determined by two time scales: the homogeneous decay time of the spin coherence, and the two-photon correlation time. This relaxes two constraints of optical data storage. First, only the ground-state coherences, and not the optical coherences, have to be long lived. Noting that spin coherences with lifetimes up to approx.1 second are known to exist in certain solids at room temperature, this technique opens up the possibility of finding high density optical data storage materials above liquid nitrogen temperature. Second, the laser frequency does not have to be highly stabilized, since the two photon correlation time can be made independent of single frequency linewidth if one laser frequency is generated from the other via acousto-optic modulation, for example. Finally, this system may be used to enhance the storage density since, in addition to the spin coherence, the Raman excitation can create optical coherence. Therefore, optical data can be stored in holes burnt in a two-dimensional frequency space, leading to a five-dimensional data storage. In the time domain picture, such a combined scheme corresponds to extension of the write window, enabling the memory capacity (at a single position) to exceed the current fundamental limit imposed by the ratio of the optical inhomogeneous to homogeneous linewidths. The basic physics of optical spectral holeburning using Raman coherent population trapping will be studied to determine suitability for potential applications to optical data storage and image processing. This will be accomplished by performing experimental and theoretical studies of spectral holeburning in rare-earth doped crystals. Specific experiments include basic characterization of Raman population trapping in a doped crystal, storage and retrieval of optical data with Raman-excited spin echoes in solids using modestly stabilized lasers, and basic demonstration of enhanced storage density via spectral hole burning in a two dimensional frequency space. Theoretical calculations will include more than two ground-states in order to more closely match the characteristics of the actual systems. Finally, projections will be made, based on the experimental and theoretical results, as to the feasibility of practical optical memories with Raman population trapping. ***
本文研究了折叠三能级λ系统中拉曼相干居群捕获的光谱烧孔现象。这是一种新技术,它允许存储(和检索)光学数据,比传统方案具有潜在的显著优势。每个数据脉冲由两个光频率组成,对应于lambda跃迁的两个分支。关于脉冲振幅和分离的信息是编码在自旋而不是光相干中。这种相干性是由双光子过程产生的,因此其振幅与两个频率的电场振幅(即几何平均强度)的乘积成正比,并与节拍频率同步振荡。因此,可以存储分别以几何平均强度和拍频相位编码的幅度敏感光学数据和相位敏感光学数据。这种数据存储和检索方案可能比现有技术具有显著的优势。例如,写入窗口由两个时间尺度决定:自旋相干的均匀衰减时间和双光子相关时间。这放宽了光数据存储的两个限制。首先,只有基态相干,而不是光学相干,必须长时间存在。注意到自旋相干的寿命可以达到。已知在室温下存在于某些固体中的1秒,该技术开辟了在液氮温度以上寻找高密度光学数据存储材料的可能性。其次,激光频率不必高度稳定,因为如果一个激光频率是通过声光调制从另一个激光频率产生的,那么两个光子的相关时间可以独立于单频线宽。最后,该系统可以用于提高存储密度,因为除了自旋相干性外,拉曼激发还可以产生光学相干性。因此,光学数据可以存储在二维频率空间中烧成的孔中,从而实现五维数据存储。在时域图中,这种组合方案对应于写入窗口的扩展,使存储器容量(在单个位置)超过当前由光学非均匀线宽与均匀线宽之比所施加的基本限制。将研究利用拉曼相干种群捕获的光谱烧孔的基本物理特性,以确定其在光学数据存储和图像处理方面的潜在应用。这将通过在稀土掺杂晶体中进行光谱烧孔的实验和理论研究来完成。具体的实验包括在掺杂晶体中捕获拉曼种群的基本表征,使用适度稳定的激光器在固体中存储和检索拉曼激发自旋回波的光学数据,以及在二维频率空间中通过光谱孔燃烧增强存储密度的基本演示。理论计算将包括两个以上的基态,以便更接近实际系统的特性。最后,根据实验和理论结果,对具有拉曼种群捕获的实用光存储器的可行性进行了预测。***

项目成果

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Myung Kim其他文献

PATHOLOGIC OUTCOME OF UNILATERAL LOW RISK PROSTATE CANCERS ON MULTI-(≥ 12) CORE PROSTATE BIOPSY AFTER RADICAL PROSTATECTOMY
  • DOI:
    10.1016/s0022-5347(09)60167-1
  • 发表时间:
    2009-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Sung Kyu Hong;Kyung Eun Min;Seung Tae Lee;Sung Jin Jeong;Seok-Soo Byun;Myung Kim;Seung Bum Ha;In Sik Hwang;Sung Yong Cho;Hak Jong Lee;Gheeyoung Choe;Sang Eun Lee
  • 通讯作者:
    Sang Eun Lee
An XPATH Query Processor for a Decomposition Storage Scheme
用于分解存储方案的 XPATH 查询处理器
PD48-02 THE EFFECT OF IMMEDIATE SECOND RESECTION OF TUMOR BED AFTER COMPLETE TRANSURETHRAL RESECTION OF BLADDER TUMOR : A COMPARATIVE STUDY USING PROPENSITY SCORE MATCHING
  • DOI:
    10.1016/j.juro.2017.02.2350
  • 发表时间:
    2017-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Myungchan Park;Sang Hyun Park;Myung Kim;Jong Keun Kim;Cheryn Song;Bumsik Hong;Hanjong Ahn
  • 通讯作者:
    Hanjong Ahn
A Filter Lining Scheme for Efficient Skyline Computation
用于高效天际线计算的过滤衬里方案
Surface-engineered nanobeads for regioselective antibody binding: A robust immunoassay platform leveraging catalytic signal amplification
用于区域选择性抗体结合的表面工程纳米珠:一个利用催化信号放大的强大免疫分析平台
  • DOI:
    10.1016/j.bios.2025.117463
  • 发表时间:
    2025-08-01
  • 期刊:
  • 影响因子:
    10.500
  • 作者:
    Jounghyun Yoo;Youngsun Kim;Ji Hyun Back;Jawon Shin;Pan Kee Bae;Kyung Mi Park;Myung Kim;Young Hun Seo;Yecheol Bak;Yoon Ho Heo;Jeongyun Heo;Honghwan Choi;Yongju Kim;Sangyoup Lee;Ji Eun Lee;Sohdam Jeong;Jin-Kyoung Yang;Sehoon Kim
  • 通讯作者:
    Sehoon Kim

Myung Kim的其他文献

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{{ truncateString('Myung Kim', 18)}}的其他基金

Digital holography of total internal reflection for quantitative phase microscopy of cell-substrate adhesion
用于细胞-基质粘附定量相位显微镜的全内反射数字全息术
  • 批准号:
    0755705
  • 财政年份:
    2008
  • 资助金额:
    $ 21.77万
  • 项目类别:
    Continuing Grant
Digital Interference Holography: Development of a New Tomographic Microscopy Instrument
数字干涉全息术:新型断层显微仪器的开发
  • 批准号:
    0243237
  • 财政年份:
    2003
  • 资助金额:
    $ 21.77万
  • 项目类别:
    Standard Grant
Optical Sectioning Microscopy by Wavelength Scanning Digital Interference Holography
波长扫描数字干涉全息光学切片显微镜
  • 批准号:
    9986257
  • 财政年份:
    2000
  • 资助金额:
    $ 21.77万
  • 项目类别:
    Standard Grant
SGER: Optical Data Storage and Processing by Photon Echo
SGER:Photon Echo 的光学数据存储和处理
  • 批准号:
    9023746
  • 财政年份:
    1991
  • 资助金额:
    $ 21.77万
  • 项目类别:
    Standard Grant

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