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首页> 外文期刊>Applied optics >POLARIZATION STATES AND OUTPUT POWERS OF A CO2 LASER WITH AN ELECTRO-OPTIC PHASE RETARDER
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POLARIZATION STATES AND OUTPUT POWERS OF A CO2 LASER WITH AN ELECTRO-OPTIC PHASE RETARDER

机译：带光电相位延迟器的CO2激光的极化态和输出功率

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摘要

We study the power output and polarization state of a CO2 laser that contains both passive polarization-sensitive elements (Brewster plates) and an active phase-retarding electro-optic modulator (CdTe crystal). The theoretical threshold condition (i.e., the retardation required to extinguish the laser) is obtained from a cavity round-trip Jones matrix. We show that adding extra Brewster plates may be counter productive in that the required retardation voltage increases. We calculated the output power, which depends on the saturated gain properties of the active media, by iterative modeling, with the elliptically polarized light propagated repeatedly around the cavity. We compare the theory with results from a folded rf-excited waveguide CO2 laser (Laser Ecosse Model CM3500). Theory and experiment are in fair agreement for low powers. As expected, at high powers there are extra difficulties in modeling the cavity behavior, probably because of distortions induced in and by the crystal. [References: 10]
机译：我们研究了既包含无源偏振敏感元件（布鲁斯特板）又包含有源相位延迟电光调制器（CdTe晶体）的CO2激光器的功率输出和偏振态。从腔往返琼斯矩阵获得理论阈值条件（即，熄灭激光所需的延迟）。我们表明，添加额外的Brewster板可能会适得其反，因为所需的延迟电压会增加。我们通过迭代建模计算了输出功率，该功率取决于有源介质的饱和增益特性，其中椭圆偏振光在空腔周围反复传播。我们将理论与折叠射频激励波导CO2激光器（Laser Ecosse CM3500型）的结果进行比较。对于低功率，理论和实验完全吻合。如预期的那样，在高功率下，对空腔行为进行建模存在额外的困难，这可能是由于晶体内部和晶体引起的畸变所致。 [参考：10]

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