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arXiv 1901.05922physics.optics
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双光子吸收自由压电III/V半导体光机械吉赫振荡器

Optomechanical Gigahertz Oscillator made of a Two Photon Absorption free piezoelectric III/V semiconductor

Inès Ghorbel, François Swiadek, Rui Zhu, Daniel Dolfi, Gaëlle Lehoucq, Aude Martin, Grégory Moille, Loïc Morvan, Rémy Braive, Sylvain Combrié, Alfredo De Rossi

摘要:

GHz频率范围内的振荡器是电信、定时和定位应用的关键构件。直接工作在GHz和紧凑,同时保持高频率稳定性,仍然是一个最新的挑战。最近,光机械晶体,紧凑的性质,已经表现出GHz的频率模式,从而收集使用它们作为振荡器的先决条件的功能。在这里,我们报告的示范,在环境大气条件下,设计的光学机械振荡器的原始概念的基础上双色一维光学机械晶体。直接在3 GHz的自持振荡通常是用40 $μW$的低光功率阈值和与自激光机械振荡器的相位噪声测量(在1 MHz处距载波为-113 dBc/Hz)一致的窄至100 Hz的短期线宽来实现的。该振荡器是由InGaP,低损耗和TPA自由的压电材料,这使得它的光学机械的价值。

英文摘要:

Oscillators in the GHz frequency range are key building blocks for telecommunication, timing and positioning applications. Operating directly in the GHz and compactness while keeping high frequency stability, is still an up-to-date challenge. Recently, optomechanical crystals, compact by nature, have demonstrated GHz frequency modes, thus gathering prerequisite features for using them as oscillators. Here we report on the demonstration, in ambient atmospheric conditions, of an optomechanical oscillator designed with an original concept based on bichromatic one-dimensional optomechanical crystal. Self sustained oscillations directly at 3 GHz are routinely achieved with a low optical power threshold of 40 $μW$ and short-term linewidth narrowed down to 100 Hz in agreement with phase noise measurements (-113 dBc/Hz at 1 MHz from the carrier) for free running optomechanical oscillators. This oscillator is made of InGaP, low loss and TPA-free piezoelectric material which makes it valuable for optomechanics.

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