专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06282341B1 Tunable, mechanically induced long-period fiber grating with enhanced polarizing characteristics 有权
标题翻译：可调谐，机械诱导具有增强的偏振特性的长周期光纤光栅
公开(公告)号：US06282341B1
公开(公告)日：2001-08-28
申请号：US09469744
申请日：1999-12-21
申请人： Michel J. F. Digonnet , Silviu Savin , Gordon S. Kino , H. John Shaw
发明人： Michel J. F. Digonnet , Silviu Savin , Gordon S. Kino , H. John Shaw
IPC分类号： G02B634
CPC分类号： G02B6/02071 , G02B6/02095 , G02B6/02109 , G02B6/022 , G02B6/274 , G02B6/2793 , H01S3/0675 , H01S2301/04
摘要： A new type of fiber filter is useable in optical communication systems. In particular, the fiber filter may be used to flatten the gain of erbium-doped fiber amplifiers (EDFAs). Such gain flattening is important for long-haul, dense (wavelength dependent multiplexed) WDM communication systems. The filter includes a periodic mechanical structure pressed against the side of a single-mode fiber to induce a wavelength-dependent loss in a signal propagating in the fiber core by coupling the signal to fiber cladding modes. The mechanical structure is a periodic comb of small ridges. Each ridge induces a local index change in the fiber via the photoelastic effect. For coupling to the right cladding modes, the period of the grating (and the comb) is in the range of few hundreds of microns. Thus, the grating is easy to fabricate with standard machining equipment.
摘要翻译：一种新型的光纤滤波器可用于光通信系统。特别地，光纤滤波器可用于平坦化掺铒光纤放大器（EDFA）的增益。这种增益平坦化对于长距离密集（波长相关多路复用）WDM通信系统是重要的。滤波器包括按照单模光纤侧面的周期性机械结构，以通过将信号耦合到光纤包层模式来引起在光纤芯中传播的信号中的波长相关损耗。机械结构是小脊的周期梳。每个脊通过光弹效应引起纤维中的局部折射率变化。为了耦合到正确的包层模式，光栅（和梳子）的周期在几百微米的范围内。因此，光栅易于用标准的加工设备制造。

2. 发明授权

US6097486A Fiber optic acoustic sensor array based on Sagnac interferometer 有权
标题翻译：基于Sagnac干涉仪的光纤声学传感器阵列
公开(公告)号：US6097486A
公开(公告)日：2000-08-01
申请号：US253446
申请日：1999-02-19
申请人： Benjamin J. Vakoc , Michel J. F. Digonnet , Gordon S. Kino , H. John Shaw
发明人： Benjamin J. Vakoc , Michel J. F. Digonnet , Gordon S. Kino , H. John Shaw
IPC分类号： G01C19/72 , G01D5/353 , G01H9/00 , G01N29/00 , G01B9/02
CPC分类号： G01D5/35383
摘要： A fiber optic acoustic sensor array is based upon a Sagnac interferometer rather than being based upon Mach-Zehnder interferometers as in known acoustic sensor arrays. The fiber optic acoustic sensor array is used to detect acoustic waves in water. By basing the sensor array on the Sagnac interferometer rather than on a Mach-Zehnder interferometer, the sensor array has a stable bias point, has reduced phase noise, has a larger dynamic range, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of acoustic sensors can be multiplexed into the architecture of the Sagnac interferometer.
摘要翻译：光纤声学传感器阵列基于Sagnac干涉仪，而不是像已知的声学传感器阵列中的基于马赫 - 曾德尔干涉仪。光纤声学传感器阵列用于检测水中的声波。通过将传感器阵列基于Sagnac干涉仪而不是Mach-Zehnder干涉仪，传感器阵列具有稳定的偏置点，具有降低的相位噪声，具有较大的动态范围，并且允许使用宽带信号源而不是要求一个更昂贵的窄线激光。大量的声传感器可以复用到Sagnac干涉仪的架构中。

3. 发明授权

US6084233A Optical sensor array having multiple rungs between distribution and return buses and having amplifiers in the buses to equalize return signals 失效
公开(公告)号：US6084233A
公开(公告)日：2000-07-04
申请号：US891287
申请日：1997-07-10
申请人： Craig W. Hodgson , Jefferson L. Wagener , Michel J. F. Digonnet , H. John Shaw
发明人： Craig W. Hodgson , Jefferson L. Wagener , Michel J. F. Digonnet , H. John Shaw
IPC分类号： H01J5/16 , G01D5/353 , G01H9/00 , H04B10/17 , G01J1/104
CPC分类号： H04B10/2939 , G01D5/35383 , G01H9/004
摘要： The present invention significantly improves the signal to noise ratio (SNR) in a passive optical array comprising sensors located in rungs between a distribution bus and a return bus. Erbium-doped optical fiber amplifiers are included in the buses proximate to each rung coupling to offset the coupler splitting losses. The gains of the amplifiers are selected to offset losses due to the couplings. The overall SNR can be maintained without significant degradation even for large numbers of sensors. In one aspect of the present invention, the amplifiers are located along the distribution and return buses directly after the couplers, except for the last coupler. In a second aspect, the amplifiers are located directly before each coupler. The optical amplifiers preferably are made of short lengths of erbium-doped fiber spliced into the distribution and return buses. Improvements can be made to the SNR when the distribution bus coupling ratios are set at optimal values. The value of the optimal coupling ratio depends upon the amplifier configuration, the excess loss and other configuration parameters. In preferred embodiments, sensors are grouped into parallel configurations in the rungs between the distribution and return buses to increase the number of sensors without a corresponding increase in the number of amplifiers and with an improvement in system performance. The number of sensors per rung is optimized to provide a low noise figure (NF) or a high SNR for each sensor in the array within a reasonable pump power budget.

4. 发明授权

US06687048B2 Polarization and wavelength stable superflourescent sources 有权
标题翻译：极化和波长稳定的超流体源
公开(公告)号：US06687048B2
公开(公告)日：2004-02-03
申请号：US10170783
申请日：2002-06-11
申请人： Dario G. Falquier , Michel J. F. Digonnet , H. John Shaw
发明人： Dario G. Falquier , Michel J. F. Digonnet , H. John Shaw
IPC分类号： H01S300
CPC分类号： H01S3/06795 , H01S3/06754 , H01S3/094042 , H01S3/09415
摘要： The instability of the mean wavelength of a superfluorescent fiber source (SFS) is reduced by randomizing the polarization of light from a pump source or by using polarization maintaining components. In one embodiment, the polarization of a pump source is made more random, leading to greater stability of the mean wavelength of the SFS, with an output mean wavelength that is stable to better than 3 ppm for full rotation of the pump polarization state. In another embodiment, the polarization of optical radiation throughout the device is kept substantially constant by using polarization maintaining fiber and components, thereby leading to enhanced mean wavelength stability of the SFS.
摘要翻译：通过使来自泵浦源的光的偏振随机化或通过使用偏振保持元件来降低超荧光光纤源（SFS）的平均波长的不稳定性。在一个实施例中，使泵浦源的极化更随机，导致SFS的平均波长的更大的稳定性，对于泵极化状态的完全旋转，输出平均波长对于优于3ppm是稳定的。在另一个实施例中，通过使用偏振保持光纤和部件，整个装置中的光辐射的极化保持基本上恒定，从而导致SFS的平均波长稳定性的增强。

5. 发明授权

US5701318A Polarized superfluorescent fiber sources 失效
标题翻译：极化超荧光纤维来源
公开(公告)号：US5701318A
公开(公告)日：1997-12-23
申请号：US645965
申请日：1996-05-10
申请人： Michel J. F. Digonnet , Dario G. Falquier , Jefferson L. Wagener , H. John Shaw
发明人： Michel J. F. Digonnet , Dario G. Falquier , Jefferson L. Wagener , H. John Shaw
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/38
CPC分类号： H01S3/06795 , H01S3/06712 , Y10S372/703
摘要： A superfluorescent fiber source outputs highly polarized light without a substantial decrease in output power efficiency. According to one embodiment, a polarizer is spliced within the superfluorescent fiber at a selected location along the length of the fiber (e.g., near the middle of the fiber). According to another embodiment, the entire length of the superfluorescent fiber is polarizing to thereby assure that one of the polarizations of light is substantially extinguished while the other polarization of light is nearly double the power which that polarization would have if the polarizer were not present within the superfluorescent fiber. In this manner, superfluorescent sources can be adapted especially for use in fiber optic gyroscopes, or the like, which require highly polarized light, without a substantial reduction in efficiency.
摘要翻译：超荧光光纤源输出高偏振光，而输出功率效率没有显着降低。根据一个实施例，偏振器在沿着纤维长度（例如，靠近纤维中部）的选定位置处在超荧光纤维内部接合。根据另一个实施例，超荧光纤维的整个长度是偏振的，从而确保光的极化之一基本上熄灭，而光的另一个极化几乎是如果偏振器不存在的那样偏振将具有的功率的两倍超荧光纤维。以这种方式，超荧光源可以特别适用于需要高度偏振光的光纤陀螺仪等，而不会显着降低效率。

6. 发明授权

US06429965B1 Polarization and wavelength stable superfluorescent sources 有权
公开(公告)号：US06429965B1
公开(公告)日：2002-08-06
申请号：US09429049
申请日：1999-10-29
申请人： Dario G. Falquier , Michel J. F. Digonnet , H. John Shaw
发明人： Dario G. Falquier , Michel J. F. Digonnet , H. John Shaw
IPC分类号： H01S300
CPC分类号： H01S3/06795 , H01S3/06754 , H01S3/094042 , H01S3/09415
摘要： The instability of the mean wavelength of a superfluorescent fiber source (SFS) is reduced by randomizing the polarization of light from a pump source or by using polarization maintaining components. In one embodiment, the polarization of a pump source is made more random, leading to greater stability of the mean wavelength of the SFS, with an output mean wavelength that is stable to better than 3 ppm for full rotation of the pump polarization state. In another embodiment, the polarization of optical radiation throughout the device is kept substantially constant by using polarization maintaining fiber and components, thereby leading to enhanced mean wavelength stability of the SFS.

7. 发明授权

US6040571A Time domain multiplexed amplified sensor arrays with improved signal to noise ratios 有权
标题翻译：具有改善的信噪比的时域多路复用放大传感器阵列
公开(公告)号：US6040571A
公开(公告)日：2000-03-21
申请号：US237716
申请日：1999-01-26
申请人： Craig W. Hodgson , Jefferson L. Wagener , Michel J. F. Digonnet , H. John Shaw
发明人： Craig W. Hodgson , Jefferson L. Wagener , Michel J. F. Digonnet , H. John Shaw
IPC分类号： H01J5/16 , G01D5/353 , G01H9/00 , H04B10/17
CPC分类号： H04B10/2939 , G01D5/35383 , G01H9/004
摘要： The present invention significantly improves the signal to noise ratio (SNR) in a passive optical array by adding erbium-doped optical amplifiers between the sensor couplings to offset the coupler splitting losses. Optical amplifiers are inserted between the sensor couplings along the signal path, and the gain of the amplifiers is designed to offset losses due to the previous coupling. The overall SNR can be maintained without significant degradation even for large numbers of sensors. In a first aspect of the present invention, the amplifiers are located along the distribution and return buses directly after the couplers, except possibly for the last sensor. In a second aspect of the present invention, the amplifiers are located directly before the couplers. The optical amplifiers preferably are made of short lengths of erbium-doped fiber spliced into the distribution and return buses. Improvements can be made to the SNR when the distribution bus coupling ratios are set at optimal values. The value of the optimal coupling ratio depends upon the amplifier configuration, the excess loss and other configuration parameters. In alternative embodiments, sensors are grouped into parallel configurations along the distribution and return buses to increase the number of sensors without a corresponding increase in the number of amplifiers and with an improvement in system performance to a certain point.
摘要翻译：本发明通过在传感器耦合之间添加掺铒光放大器来显着提高无源光学阵列中的信噪比（SNR），以抵消耦合器分离损耗。光放大器被插入到沿着信号路径的传感器耦合之间，并且放大器的增益被设计成抵消由于先前的耦合引起的损耗。即使对于大量的传感器也可以保持整体SNR而没有显着的降低。在本发明的第一方面中，除了最后一个传感器之外，放大器沿着分配和返回总线直接位于耦合器之后。在本发明的第二方面中，放大器直接位于耦合器之前。光放大器优选地由拼接到分配和返回总线中的短长度的掺铒光纤制成。当分配总线耦合比被设置为最佳值时，可以对SNR进行改进。最佳耦合比的值取决于放大器配置，过剩损耗和其他配置参数。在替代实施例中，传感器沿着分配和返回总线被分组成并行配置，以增加传感器的数量，而不会相应地增加放大器的数量，并且将系统性能提高到某一点。

8. 发明授权

US06532105B2 Polarization and wavelength stable superfluorescent sources 有权
公开(公告)号：US06532105B2
公开(公告)日：2003-03-11
申请号：US10170796
申请日：2002-06-11
申请人： Dario G. Falquier , Michel J. F. Digonnet , H. John Shaw
发明人： Dario G. Falquier , Michel J. F. Digonnet , H. John Shaw
IPC分类号： H01S300
CPC分类号： H01S3/06795 , H01S3/06754 , H01S3/094042 , H01S3/09415
摘要： The instability of the mean wavelength of a superfluorescent fiber source (SFS) is reduced by randomizing the polarization of light from a pump source or by using polarization maintaining components. In one embodiment, the polarization of a pump source is made more random, leading to greater stability of the mean wavelength of the SFS, with an output mean wavelength that is stable to better than 3 ppm for full rotation of the pump polarization state. In another embodiment, the polarization of optical radiation throughout the device is kept substantially constant by using polarization maintaining fiber and components, thereby leading to enhanced mean wavelength stability of the SFS.

9. 发明授权

US06365891B1 Optical sensor array having multiple rungs between distribution and return buses and having amplifiers in the buses to equalize return signals 有权
标题翻译：光传感器阵列在分布和返回总线之间具有多个梯级，并且在总线中具有均衡返回信号的放大器
公开(公告)号：US06365891B1
公开(公告)日：2002-04-02
申请号：US09606771
申请日：2000-06-29
申请人： Craig W. Hodgson , Jefferson L. Wagener , Michel J. F. Digonnet , H. John Shaw
发明人： Craig W. Hodgson , Jefferson L. Wagener , Michel J. F. Digonnet , H. John Shaw
IPC分类号： G01J104
CPC分类号： H04B10/2939 , G01D5/35383 , G01H9/004
摘要： The present invention significantly improves the signal to noise ratio (SNR) in a passive optical array comprising sensors located in rungs between a distribution bus and a return bus. Erbium-doped optical fiber amplifiers are included in the buses proximate to each rung coupling to offset the coupler splitting losses. The gains of the amplifiers are selected to offset losses due to the couplings. The overall SNR can be maintained without significant degradation even for large numbers of sensors. In one aspect of the present invention, the amplifiers are located along the distribution and return buses directly after the couplers, except for the last coupler. In a second aspect, the amplifiers are located directly before each coupler. The optical amplifiers preferably are made of short lengths of erbium-doped fiber spliced into the distribution and return buses. Improvements can be made to the SNR when the distribution bus coupling ratios are set at optimal values. The value of the optimal coupling ratio depends upon the amplifier configuration, the excess loss and other configuration parameters. In preferred embodiments, sensors are grouped into parallel configurations in the rungs between the distribution and return buses to increase the number of sensors without a corresponding increase in the number of amplifiers and with an improvement in system performance. The number of sensors per rung is optimized to provide a low noise figure (NF) or a high SNR for each sensor in the array within a reasonable pump power budget.
摘要翻译：本发明显着地改善了包括位于分配总线和返回总线之间的梯级中的传感器的无源光学阵列中的信噪比（SNR）。铒掺杂光纤放大器包括在靠近每个梯级耦合的总线中，以抵消耦合器分裂损耗。选择放大器的增益来抵消由于耦合造成的损耗。即使对于大量的传感器也可以保持整体SNR而没有显着的降低。在本发明的一个方面，除了最后一个耦合器之外，放大器沿着分配和返回总线直接位于耦合器之后。在第二方面，放大器直接位于每个耦合器之前。光放大器优选地由拼接到分配和返回总线中的短长度的掺铒光纤制成。当分配总线耦合比被设置为最佳值时，可以对SNR进行改进。最佳耦合比的值取决于放大器配置，过剩损耗和其他配置参数。在优选实施例中，传感器在分布和返回总线之间的梯级中被分组成并行配置，以增加传感器的数量，而不增加放大器的数量并改善系统性能。每个梯级的传感器数量被优化，以在合理的泵功率预算内为阵列中的每个传感器提供低噪声系数（NF）或高SNR。

10. 发明授权

US5920666A Stable nonlinear Mach-Zehnder fiber switch 失效
标题翻译：稳定的非线性马赫 - 曾德尔光纤开关
公开(公告)号：US5920666A
公开(公告)日：1999-07-06
申请号：US939
申请日：1997-12-30
申请人： Michel J. F. Digonnet , H. John Shaw , Richard H. Pantell , Robert W. Sadowski
发明人： Michel J. F. Digonnet , H. John Shaw , Richard H. Pantell , Robert W. Sadowski
IPC分类号： G01B9/02 , G02B6/28 , G02F1/35 , G02F1/365 , G02B6/26
CPC分类号： G02F1/3517
摘要： An all-optical fiber switch is implemented within a short Mach-Zehnder interferometer configuration. The Mach-Zehnder switch is constructed to have a high temperature stability so as to minimize temperature gradients and other thermal effects which result in undesirable instability at the output of the switch. The Mach-Zehnder switch of the preferred embodiment is advantageously less than 2 cm in length between couplers to be sufficiently short to be thermally stable, and full switching is accomplished by heavily doping one or both of the arms between the couplers so as to provide a highly nonlinear region within one or both of the arms. A pump input source is used to affect the propagation characteristics of one of the arms to control the output coupling ratio of the switch. Because of the high nonlinearity of the pump input arm, low pump powers can be used, thereby alleviating difficulties and high cost associated with high pump input powers.
摘要翻译：全光纤交换机在短的Mach-Zehnder干涉仪配置下实现。马赫 - 曾德尔（Mach-Zehnder）开关被构造成具有高温度稳定性，以便最小化温度梯度和其他热效应，这导致开关输出端的不期望的不稳定性。优选实施例的马赫 - 策德尔开关有利地在耦合器之间的长度小于2cm，足够短到不能热稳定，并且完全切换是通过在耦合器之间大量掺杂一个或两个臂来实现的，从而提供一个或两个臂内的高度非线性区域。泵输入源用于影响其中一个臂的传播特性，以控制开关的输出耦合比。由于泵输入臂的非线性高，可以使用低泵浦功率，从而减轻与高泵输入功率相关的困难和高成本。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式