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Best absorption spectrum modulation transfer process research and its application in laser frequency stabilization

Author: CaoYunJiu
Tutor: BiZhiYi
School: East China Normal University
Course: Optics
Keywords: Modulation transfer optical heterodyne spectroscopy Laser frequency stabilization Absorption process Center Slope
CLC: TN241
Type: Master's thesis
Year: 2006
Downloads: 145
Quote: 0
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Abstract


In this thesis, both theoretically and experimentally , the modulation transfer optical heterodyne spectral absorption process conducted a series of analysis and research , focusing on the signal to noise ratio and the number of absorbed Cheng Duixin slope of line center . Theoretically, the absorption process in order to study the modulation transfer the sample optical heterodyne spectroscopy impact , the use of micro-element method of superposition deduced spectrum signal modulation transfer formula , according to the formula of the absorption signal process spectral line amplitude of the modulation transfer and the center of the slope , and the absorption process at different temperatures were analyzed to obtain the optimum value of the absorption process , the laser frequency stabilization experiment absorption length selected to provide theoretical guidance . Experimentally, with Nd: YAG solid-state laser as the light source , using the modulation transfer optical heterodyne spectroscopy , optical path using the times obtained by means of molecular iodine near 532nm band hyperfine structure lines and the laser frequency is locked in R (56) 32-0, a10 this hyperfine transition lines on . Compares different absorption length modulation transfer optical heterodyne spectroscopy signal to noise ratio and the slope of line center and frequency stabilization accuracy obtained by comparing the absorption process to select the best help to improve the transfer of optical heterodyne spectrum modulation signal to noise ratio and spectral the center line of the slope , is expected to achieve higher accuracy of the laser frequency lock .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser physics and basic theory
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