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公开(公告)号：US09647771B2
公开(公告)日：2017-05-09
申请号：US15083563
申请日：2016-03-29
CPC分类号： H04B10/80 , H01S3/0078 , H01S3/2391 , H04B10/503
摘要： Systems and methods for wavelength optimization for underwater optical communication can include a plurality of n lasers having different wavelengths λi for i=1 to n, a beam splitter and a corner retro-reflector. The plurality of n lasers can simultaneously illuminate the beam splitter along a coincident axis. The plurality of n lasers can be selectively blocked so that only one laser wavelength λi at a time impinges on the beam splitter. A portion passes through the beam splitter to establish a reference signal, while the remainder is reflected off the corner retro-reflector. A portion of return illumination passes through the beam splitter to establish a return signal. The process can be repeated for each of n lasers for i=1 to n. The λi wavelength where the normalized signal-to-noise differential between the reference signal and return signal is the minimum can be the optimum communication wavelength.
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公开(公告)号：US20170093502A1
公开(公告)日：2017-03-30
申请号：US15083563
申请日：2016-03-29
CPC分类号： H04B10/80 , H01S3/0078 , H01S3/2391 , H04B10/503
摘要： Systems and methods for wavelength optimization for underwater optical communication can include a plurality of n lasers having different wavelengths λi for i=1 to n, a beam splitter and a corner retro-reflector. The plurality of n lasers can simultaneously illuminate the beam splitter along a coincident axis. The plurality of n lasers can be selectively blocked so that only one laser wavelength λi at a time impinges on the beam splitter. A portion passes through the beam splitter to establish a reference signal, while the remainder is reflected off the corner retro-reflector. A portion of return illumination passes through the beam splitter to establish a return signal. The process can be repeated for each of n lasers for i=1 to n. The λi wavelength where the normalized signal-to-noise differential between the reference signal and return signal is the minimum can be the optimum communication wavelength.
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公开(公告)号：US20200378762A1
公开(公告)日：2020-12-03
申请号：US16427579
申请日：2019-05-31
IPC分类号： G01C19/5726 , G01C19/5677 , G01C19/04 , G01C19/5712 , G01C19/5656 , H04B10/40
摘要： A gyroscope and method for navigating using the gyroscope can include a substrate that can define a cavity. The cavity can be placed under a vacuum, and a birefringent microrotor can be located in the cavity. A light source can direct light through the substrate and into the cavity to establish an optical spring effect, which act on the microrotor to establish an initial reference position, as well as to establish rotational and translational motion of said microrotor. A receiver can detect light that has passed through said cavity. Changes in light patterns that can be detected at the receiver can be indicative of a change in position of the microrotor. The change and rate of change in position of the microrotor can be used for inertial navigation.
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