| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Phase Tuning Characteristics of a Double-Longitudinal-Mode He-Ne Laser with Optical Feedback |
| ZENG Zhao-Li, ZHANG Shu-Lian**, TAN Yi-Dong, CHEN Wen-Xue, LI Yan |
| The State Key Lab of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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ZENG Zhao-Li, ZHANG Shu-Lian, TAN Yi-Dong et al 2012 Chin. Phys. Lett. 29 094208 |
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Abstract The phase tuning characteristics of a double-longitudinal-mode He-Ne laser with optical feedback are demonstrated. The phase behaviors of the two adjacent longitudinal modes are studied with different laser cavity lengths at the weak feedback level, and it is found that the phase difference of the two modes can be 0 to 180° along with the changing of the length of external cavity. The high-density intensity fringes are obtained with asymmetric feedback cavity at a strong feedback level. In particular, the phase difference is also observed between the two high-density fringes of adjacent modes, which have the potential to develop a direction sensitive laser feedback interferometer with high resolution. A simple theoretical analysis is presented, which fits well with the experimental results.
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Received: 06 June 2012
Published: 01 October 2012
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| PACS: |
42.55.Lt
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(Gas lasers including excimer and metal-vapor lasers)
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07.60.Ly
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(Interferometers)
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42.62.Eh
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(Metrological applications; optical frequency synthesizers for precision spectroscopy)
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42.62.Fi
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(Laser spectroscopy)
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