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11. 发明申请

US20100284018A1 SYSTEMS AND METHODS FOR EFFECTIVE RELATIVE INTENSITY NOISE (RIN) SUBTRACTION IN DEPOLARIZED GYROS 审中-公开
标题翻译：有效的相对强度噪声（RIN）在不确定的GYROS中的分配的系统和方法
公开(公告)号：US20100284018A1
公开(公告)日：2010-11-11
申请号：US12463887
申请日：2009-05-11
申请人： Tiequn Qiu , Steven J. Sanders , Chellappan Narayanan
发明人： Tiequn Qiu , Steven J. Sanders , Chellappan Narayanan
IPC分类号： G01C19/72
CPC分类号： G01C19/721
摘要： Effective relative intensity noise (RIN) subtraction systems and methods for improving ARW performance of a depolarized gyros. This invention taps the RIN detector light in the sensing loop, after the light transmits through the depolarizer and the coil but before it combines with the counter propagating lightwave. The tapped RIN lightwaves are polarized with pass-axis orientated in the same direction as that of the IOC, so that the RIN detector receives lightwaves with spectrum substantially identical to that of the rate detector, leading to more effective RIN subtraction.
摘要翻译：有效相对强度噪声（RIN）减法系统和改善去极化陀螺仪的ARW性能的方法。本发明在光透过去偏振器和线圈之后，然后将其与反向传播的光波组合之前，将感测环中的RIN检测器光抽头。敲击的RIN光波被以与IOC相同的方向定向的通轴进行极化，使得RIN检测器接收光谱，其光谱与速率检测器的光谱基本相同，导致更有效的RIN减法。

12. 发明授权

US06442311B1 Optical device having modified transmission characteristics by localized thermal treatment 有权
标题翻译：通过局部热处理具有改进的传输特性的光学装置
公开(公告)号：US06442311B1
公开(公告)日：2002-08-27
申请号：US09350205
申请日：1999-07-09
申请人： Giovanni Barbarossa , Chellappan Narayanan
发明人： Giovanni Barbarossa , Chellappan Narayanan
IPC分类号： G02B634
CPC分类号： G02B6/13 , G02B6/105 , G02B2006/12171
摘要： Transmission characteristics of an optical device 200, fabricated from multiple layers 16, 27, 28 of silica-based glass on a silicon substrate 26, are modified by localized thermal treatment. The beam 501 of a carbon-dioxide (CO2) laser 510 is used to selectively soften the core and/or cladding material of a waveguide structure during or after the fabrication process. In one application, softening relieves the strain developed between the waveguide structure and the silicon substrate and substantially reduces or eliminates birefringence. In a second application, the CO2 laser is operated at another power level in order to modify the index of refraction. Changes in the index of refraction change the speed of light through a waveguide thereby changing the phase shift associated with the waveguide. In a third application, the CO2 laser is operated at yet another power level to increase the transmission loss of the waveguide. In all of the embodiments, heat treatment is substantially faster and/or less expensive than known techniques for modifying the transmission characteristics of an optical device.
摘要翻译：通过局部热处理改变在硅衬底26上由二氧化硅基玻璃的多层16,27,28制成的光学器件200的透射特性。二氧化碳（CO2）激光器510的光束501用于在制造过程中或之后选择性地软化波导结构的芯和/或包层材料。在一个应用中，软化消除了在波导结构和硅衬底之间产生的应变，并且基本上减少或消除了双折射。在第二个应用中，CO2激光器在另一个功率电平下工作，以便改变折射率。折射率的变化通过波导改变光的速度，从而改变与波导相关的相移。在第三个应用中，CO2激光器在另一功率电平下操作以增加波导的传输损耗。在所有实施例中，热处理比用于修改光学器件的传输特性的已知技术快得多和/或更便宜。

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