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

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 200µm to 700µm and resonant Q factors above 108 are obtained. Du...

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Bibliographic Details
Published in:Optics communications 2017-03, Vol.387, p.421-425
Main Authors: Che, Kaijun, Zhang, Pan, Guo, Changlei, Tang, Deyu, Ren, Changyan, Xu, Huiying, Luo, Zhengqian, Cai, Zhiping
Format: Article
Language:English
Subjects:
High Q resonators
Laser and laser optics
Stimulated Brillouin scattering
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Summary: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 200µm to 700µm 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 1.55µm are observed in a cavity with a diameter of ~760µm 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.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2016.10.067