期刊
CHINESE OPTICS LETTERS
卷 19, 期 11, 页码 -出版社
OSA-OPTICAL SOC
DOI: 10.3788/COL202119.111404
关键词
Er:YAG; single longitudinal mode; cylindrical vector beam
类别
资金
- National Key Research and Development Program of China [2017YFB0405203]
- National Natural Science Foundation of China [11834001, 61905012]
- National Defense Basic Scientific Research Program of China [JCKY2020602C007]
This paper demonstrates a scheme to tailor both longitudinal and transverse modes inside a laser cavity to create an eye-safe single longitudinal mode Er:YAG vector laser. By using a q-plate and an optical isolator, characteristics of power, transverse intensity, and polarization spectrum of the output beams are observed, showing successful tailoring of both longitudinal and transverse modes.
In this paper, we demonstrate a scheme to tailor both longitudinal and transverse modes inside a laser cavity and constitute an eye-safe single longitudinal mode Er:Y3Al5O12 (Er:YAG) vector laser. A q-plate is employed as a spin-orbital conversion element to modulate the transverse mode and obtain cylindrical vector beams. An optical isolator is employed as a non reciprocal element for the ring cavity to enforce unidirectional operation and achieve single longitudinal oscillation. The characteristics of power, transverse intensity, and polarization spectrum of the output beams are observed. The observed typical single longitudinal mode and highly matched special polarizations prove the successful tailoring of both longitudinal and transverse modes.
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