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首页> 外文期刊>Mapan: Journal of Metrology Society of India >A Heterodyne Laser System to Study Frequency Stabilized Zeeman 633 nm He-Ne Lasers Deficient in Temperature Steadiness
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A Heterodyne Laser System to Study Frequency Stabilized Zeeman 633 nm He-Ne Lasers Deficient in Temperature Steadiness

机译：外差激光系统，用于研究温度稳定度不足的频率稳定的塞曼633 nm He-Ne激光器

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摘要

A heterodyne laser system is constructed to study the effect of external transverse magnetic field on the dynamic instability of internal mirror TEM_(00q) He-Ne lasers having temperature instability. The system could provide precise detailed knowledge about the roles of both the temperature and the applied magnetic field separately. Two different internal mirror 633 nm TEM_(00q) He-Ne lasers with frequency stability of 10~(-6) are studied. The applied transverse magnetic field on He-Ne lasers increased the frequency stability to be in the order of approx10~(-10), in spite of temperature instability. In the same time, a single-mode operation with an enhanced laser output power is obtained. The sensitivity of the method showed that the laser exhibits a short-term frequency stability of 4.7X10~(-10), which after one minute, when mode collapse starts, decreased to 2.6X10~(-8), over the next four minutes. This increase in the frequency difference of the inter-mode beat signal that affect the stability is attributed to the uncontrolled temperature of the laser tube. The results revealed that the magnetic field plays the dominant role to achieve the maximum frequency stability, while the unsteadiness of temperature of the laser tubes limits the long term single-mode laser operation.
机译：为了研究外部横向磁场对具有温度不稳定性的内镜TEM_（00q）He-Ne激光器的动态不稳定性的影响，建立了外差激光系统。该系统可以分别提供有关温度和外加磁场作用的精确详细知识。研究了两种不同的频率稳定度为10〜（-6）的633 nm TEM_（00q）He-Ne内镜激光器。尽管温度不稳定，但在He-Ne激光器上施加的横向磁场将频率稳定性提高到大约10〜（-10）。同时，获得具有增强的激光输出功率的单模操作。该方法的灵敏度表明，该激光器具有4.7X10〜（-10）的短期频率稳定性，在模式崩溃开始后一分钟后，在接下来的四分钟内降低至2.6X10〜（-8）。 。影响稳定性的模间差拍信号频率差的这种增加归因于激​​光管的不受控制的温度。结果表明，磁场在实现最大频率稳定性方面起着主导作用，而激光管温度的不稳定性限制了长期的单模激光操作。

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