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20 September 2002 Dual-frequency He-Ne laser with intracavity birefringent film
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Abstract
In order to simplify the structure of the birefringence dual frequency laser in which a quart crystal or an artificial stress plate is settled, improve the convenience of adjustment, and improve stability of FD (frequency difference), a novel structure of dual frequency laser is constructed, in which the FD is produced by the cavity mirror coated with complex multilayer birefringent film. Different layers of the multilayer film perform different functions for the whole film system of sandwich structure. From the outermost to the innermost near the substrate, there are anti-reflectance film, birefringent film and reflectance film sequentially. Utilizing both the transverse Zeeman effect and intra-cavity birefringence effect in a He-Ne laser, frequency-difference (FD) about 7 MHz is achieved in experiments.
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Jinghua Liu, Shulian Zhang, Jun Zhu, Yan Li, Qihong Wu, and Ian J. Hodgkinson "Dual-frequency He-Ne laser with intracavity birefringent film", Proc. SPIE 4919, Advanced Materials and Devices for Sensing and Imaging, (20 September 2002); https://doi.org/10.1117/12.471871
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