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公开(公告)号：US11722120B1
公开(公告)日：2023-08-08
申请号：US17391126
申请日：2021-08-02
CPC分类号： H03H9/2431 , B81B3/0027 , H03H9/02259 , B81B2201/0271 , B81B2201/047 , B81B2203/0307 , B81B2203/04
摘要： A microelectromechanical systems (MEMS)-tunable optical ring resonator is described herein. The ring resonator includes a resonator ring and a tuner ring, along with one or more springs. The springs may be internal or external, i.e., either within or outside the areal footprint of the resonator ring and the tuner ring. The one or more springs are configured to displace the tuner ring from the resonator ring by a desired gap based upon a desired resonant wavelength of the resonator ring. Tuning is implemented by applying a voltage to the ring resonator, with motion of the tuner ring causing a corresponding change in the effective index of the resonator ring. As the ring resonator is essentially a capacitive device, it draws very little power once tuning is achieved.
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公开(公告)号：US10458795B1
公开(公告)日：2019-10-29
申请号：US16100925
申请日：2018-08-10
摘要： An apparatus and a method for detecting rotation based on the Sagnac effect is disclosed. Input light having sufficient power is injected into a circulating optical resonator to thereby excite an optomechanical oscillation of the resonator at an instantaneous mechanical angular frequency. Rotation of the circulating optical resonator causes a change in a frequency of the optomechanical oscillation of the resonator, which in turn causes the instantaneous mechanical angular frequency to change. The optomechanical oscillation produces modulation sidebands in the resonating optical field at the instantaneous mechanical angular frequency and harmonics thereof, which are demodulated from the optical frequency by detection in a photodetector. Differences in the instantaneous mechanical angular frequency induced by rotation are detected by processing the photodetector output signal.
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公开(公告)号：US11726276B1
公开(公告)日：2023-08-15
申请号：US17391167
申请日：2021-08-02
发明人： Michael Wood , Alejandro J. Grine , Darwin K. Serkland , Bryan James Kaehr , Andrew E. Hollowell , Gregory M. Peake , Alexander Ruyack , Sam Palermo
CPC分类号： G02B6/4215 , G02B6/2934 , G02B6/4249 , G02B6/4295 , G02B6/43 , H04B10/40 , H04B10/503 , B81B2201/045
摘要： A photonics transceiver is described herein, wherein the photonics transceiver exhibits improved areal bandwidth density and improved energy per bit consumption relative to conventional photonics transceivers. The photonics transceiver achieves an areal bandwidth density of at least 5 Tbps/mm2 with an energy consumption of less than 500 fJ/bit (sum of energy consumed for both a transmitted bit and a received bit). The photonics transceiver is a multi-chip module, where chips in the multi-chip module are tightly integrated with one another. The multi-chip module includes light source, photodetector, photonics, and control/logic chips. The photonics chip includes transparent conducting oxide integrated optical modulators and multiplexers and demultiplexers based on MEMS-tunable optical ring resonators.
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公开(公告)号：US10892600B1
公开(公告)日：2021-01-12
申请号：US16541237
申请日：2019-08-15
摘要： A coupled-cavity vertical-cavity surface-emitting laser (VCSEL) is disclosed. The coupled-cavity VCSEL includes a passive cavity and an additional distributed Bragg Reflector (DBR) not found in conventional VCSELs, all in a monolithic device. By including these two elements, the photon lifetime may be increased by a factor of approximately ten, leading to a reduction in the laser linewidth by a factor of approximately 100 compared to conventional VCSELs. The two additional elements also serve to ensure single-mode operation of the coupled-cavity VCSEL.
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