Ultra-high Q sphere-like cavities for cascaded stimulated Brillouin lasing

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• 作者：Kaijun Che ; Pan Zhang ; Changlei Guo ; Deyu Tang ; Changyan Ren ; Huiying Xu ; ^{xuhy@xmu.edu.cn} ; Zhengqian Luo ; Zhiping Cai
• 关键词：High Q resonators ; Stimulated Brillouin scattering ; Laser and laser optics
• 刊名：Optics Communications
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：387
• 期：Complete
• 页码：421-425
• 全文大小：626 K
• 卷排序：387

文摘

High Q microsphere optical cavity is usually fabricated from a single mode fiber. Here, we propose a new method to fabricate sphere-like cavity by melting the tip of rotating quartz-rod with a CO2 laser. The cavities with diameter from 200 µm to 700 µm and resonant Q factors above 108 are obtained. Due to the rich resonances of the sphere-like cavity, up to 15-order cascaded stimulated Brillouin lasings(SBL) near 1.55 µm are observed in a cavity with a diameter of ~760 µm by simply tuning the pump wavelength to a finely-selected resonance. We wish the ultra-high Q cavities with rich resonances and bulk rod mount can have practical applications in nonlinear optics and microwave photonics as an optical component.