High Resolution Spectroscopy in Solid using an Amplitude Squeezed Diode Laser

使用振幅压缩二极管激光器进行固体高分辨率光谱分析

基本信息

批准号：
04804020
负责人：
MURAYAMA Takao
金额：
$ 1.15万
依托单位：
SHIGA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04804020/
关键词：
Amplitude squeezed state Diode laser High resolution spectroscopy FM noise Noise spectrum Homogeneous width 振幅スクィーズド状態高分解能分光スクィーズド状態

项目摘要

We developed a new method of a high resolution spectroscopy in solids using FM noise included in an amplitude squeezed diode laser. We briefly describe this method. The transmitted laser light through a cooled ruby ( Cr^3 : Al_2O_3 ) is detected by an avalanche photo diode and amplified using a wide band amplifier. The noise spectrum of the transmitted laser light is analized using an RF spectrum analyzer. If the leser light is tuned to R_1 line, FM noise is induced in the transmitted light and its noise spectrum reflects a homogeneous line shape of an absorption line. THe width of a diode laser observed by a scanning Febry-Perot is about 60 MHz ( FWHM ) and observed line width of the noise spectrum of the transmitted laser light is 120 MHz. When an applied magnetic field is increased, this width gradually becomes narrow and it is 20 MHz at 0.9 T.This width becomes wider when the sample temperature becomes high and it excess 200 MHz at 35 ﾟK.These features well coinside with the already observed phenomena. The possibility of observing a homogeneous line shape by this method is also tested by another method, Stark switching. The sawtooth-like Stark field is applied on the sample ruby and the optical hole shape is observed as a function of an applied Stark field. Temperature and applied magnetic field dependences are well coinside with the results of our new method. This new method is applied to R_2 line. The observed line width is wider than 200 MHz even at zero magnetic field. This is theoretically estimated.

我们使用放大器挤压二极管激光器中包含的FM噪声开发了一种在固体中高分辨率光谱的新方法。我们简要描述了这种方法。使用宽带放大器检测到通过冷却的红宝石（Cr^3：al_2o_3）传输的激光光（Cr^3：al_2o_3）。使用RF光谱分析仪对传输激光的噪声光谱进行分析。如果将租赁灯调谐到R_1线，则在传输的光中诱导FM噪声，其噪声频谱反映了滥用线的同质线形状。扫描2月份观察到的二极管激光器的宽度约为60 MHz（FWHM），并且观察到的透射激光光噪声光谱的线宽度为120 MHz。当施加的磁场增加时，该宽度逐渐变窄，在0.9 t时为20 MHz。当样品温度变高时，该宽度将变宽，并且在35°K时超过200 MHz。这些特征具有已观察到的现象的良好共同体。通过另一种方法，Stark Switching测试了通过这种方法观察均匀线形状的可能性。锯齿状的Stark场施加在样品红宝石上，并观察到光孔形状是所施加的Stark场的函数。温度和施加的磁场依赖性与我们的新方法的结果良好。此新方法应用于R_2行。即使在零磁场下，观察到的线宽度也宽于200 MHz。这是理论上估计的。