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1. 发明申请

WO2019213401A1 NARROW-LINEWIDTH MICROCAVITY BRILLOUIN LASER WITH SUPPRESSED TEMPERATURE FLUCTUATIONS 审中-公开
公开(公告)号：WO2019213401A1
公开(公告)日：2019-11-07
申请号：PCT/US2019/030407
申请日：2019-05-02
申请人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY , LOH, William , JUODAWLKIS, Paul, William , YEGNANARAYANAN, Siva
发明人： LOH, William , JUODAWLKIS, Paul, William , YEGNANARAYANAN, Siva
IPC分类号： G01B9/02 , G01J9/00 , G01J9/02 , G02F1/00 , G02F1/01 , G02F1/21 , G02F1/35
摘要： Ultrastable lasers serve as the backbone for advanced scientific experiments and enable atomic spectroscopy and laser interferometry at high levels of precision. But is not clear how to realize an ultrastable laser that is compact and portable for field use. An ultrastable laser source should be insensitive to both short- and long-term fluctuations in temperature, which ultimately broaden the laser linewidth and cause drift in the laser's center frequency. Fortunately, using a large mode-volume optical resonator, which suppresses the resonator's fast thermal fluctuations, together with the stimulated Brillouin scattering (SBS) optical nonlinearity presents a powerful combination that enables the ability to lase with an ultra-narrow linewidth of 20 Hz. The laser's long-term temperature drift is compensated by using the narrow Brillouin line to sense minute changes in the resonator's temperature (e.g., changes of 85 nK). The precision of this temperature measurement enables the stabilization of resonators against environmental perturbations.

2. 发明申请

WO2015017653A1 OPTOELECTRONIC FILTER 审中-公开
标题翻译：光电滤波器
公开(公告)号：WO2015017653A1
公开(公告)日：2015-02-05
申请号：PCT/US2014/049141
申请日：2014-07-31
申请人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY
发明人： LOH, William , YEGNANARAYANAN, Siva , RAM, Rajeev, J. , JUODAWLKIS, Paul, William
IPC分类号： G02F1/035
CPC分类号： G02F1/2255 , G02F1/035 , G02F1/21 , G02F2001/212
摘要： An optoelectronic filter having at least one input and an output includes a modulator circuit having at least first and second inputs with a first one of the modulator circuit inputs adapted to couple to a respective one of the at least one input of the optoelectronic filter. The modulator circuit receives at least a first radio frequency (RF) signal having a first power level and a second RF signal having a second, different power level at the first one of the modulator circuit inputs and in response thereto generates a modulated signal at an output thereof. The first RF signal is suppressed relative to the second RF signal in the modulated signal. The optoelectronic filter additionally includes a light source adapted to couple to a second one of the modulator circuit inputs. A corresponding method is also provided.
摘要翻译：具有至少一个输入和输出的光电滤波器包括具有至少第一和第二输入的调制器电路，其中第一个调制器电路输入适于耦合到光电滤波器的至少一个输入端中的相应一个输入端。调制器电路在调制器电路输入的第一个处接收至少具有第一功率电平的第一射频（RF）信号和具有第二不同功率电平的第二RF信号，并响应于此产生调制信号输出。第一RF信号相对于调制信号中的第二RF信号被抑制。光电子滤波器还包括适于耦合到第二调制器电路输入的光源。还提供了相应的方法。

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