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.

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.

公开(公告)号：US06483628B1

公开(公告)日：2002-11-19

申请号：US09429044

申请日：1999-10-29

申请人： Michel J. F. Digonnet ,  Dario G. Falquier

发明人： Michel J. F. Digonnet ,  Dario G. Falquier

IPC分类号： H01S300

CPC分类号： H01S3/06795

摘要： The wavelength stability of superfluorescent sources is controlled with optical arrangements in which the polarization-dependent gain (PDG) induced by the polarized pump light is reduced. In one apparatus and method, a Faraday rotator mirror is used at the end of the waveguide in the superfluorescent source. In another apparatus and method, the birefringence of the waveguide is exploited in conjunction with a Faraday rotator mirror to further average out the effect of PDG on the mean wavelength difference between the spectral outputs of orthogonal polarization components.

摘要翻译： 超荧光源的波长稳定性由偏振泵浦光引起的偏振相关增益（PDG）减小的光学配置来控制。 在一种装置和方法中，在超荧光源中在波导的末端使用法拉第旋转镜。 在另一种装置和方法中，波导的双折射与法拉第旋转镜结合使用，以进一步平衡PDG对正交偏振分量的光谱输出之间的平均波长差的影响。

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。

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。

公开(公告)号：US5875203A

公开(公告)日：1999-02-23

申请号：US764577

申请日：1996-12-13

申请人： Jefferson L. Wagener ,  Craig W. Hodgson ,  Dario G. Falquier

发明人： Jefferson L. Wagener ,  Craig W. Hodgson ,  Dario G. Falquier

IPC分类号： F21V8/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/17 ,  H01S3/30

CPC分类号： H01S3/06795 ,  H01S3/0675

摘要： Fiber-amplified spontaneous emission sources incorporating spectral filters show an improvement in mean wavelength stability versus a number of operating factors, including pump wavelength, pump power, feedback, and temperature. By adjusting the spectral characteristics of the filter, the position of the filter along the length of the fiber, and the length of the rare-earth doped fiber, a stable ASE source is designed so as to provide stable operating points for the mean wavelength versus desired operating parameters. In many cases the sources show an improvement in mean wavelength stability by an order of magnitude or more over present sources.

摘要翻译： 包含光谱滤波器的光纤放大自发辐射源显示了平均波长稳定性与许多工作因素的改善，包括泵浦波长，泵功率，反馈和温度。 通过调整滤光片的光谱特性，滤光器沿光纤长度的位置和稀土掺杂光纤的长度，稳定的ASE光源被设计成为平均波长相对于 所需的操作参数。 在许多情况下，光源的平均波长稳定性提高了一个数量级以上，

公开(公告)号：US06751367B2

公开(公告)日：2004-06-15

申请号：US10422146

申请日：2003-04-24

申请人： Behzad Moslehi ,  Vahid Sotoudeh ,  Brian Kutner ,  Dario G. Falquier ,  Levy Oblea

发明人： Behzad Moslehi ,  Vahid Sotoudeh ,  Brian Kutner ,  Dario G. Falquier ,  Levy Oblea

IPC分类号： G02B600

CPC分类号： G01B11/16 ,  G01D5/35316 ,  G01D5/35354 ,  G01L1/246 ,  G02B6/00 ,  G02B6/02057 ,  G02B6/022 ,  G02B6/2932 ,  G02B6/29395 ,  G02B6/29398

摘要： A fiber optic sensor comprises two independent fibers having Bragg gratings which are coupled to commutating broadband optical sources through splitters and wavelength discriminators. The ratio of detected optical energy in each of two detectors examining the wave intensity returned to a wavelength discriminator coupled with the characteristic of the wavelength discriminator determines the wavelength returned by the grating. In another embodiment, tunable filters are utilized to detect minimum returned wave energy to extract a sensor wavelength Reference to the original grating wavelength indicates the application of either temperature or strain to the grating. In another embodiment, a plurality of Bragg grating sensor elements is coupled to sources and controllers wherein a dimensional change in a fiber having a Bragg grating is detected using a measurement system comprising broad-band sources, optical power splitters, a high-sensitivity wavelength discriminator, optical detectors, and a controller.

摘要翻译： 光纤传感器包括具有布拉格光栅的两个独立光纤，其通过分离器和波长鉴别器耦合到换向宽带光源。 两个检测器中检测到的光能的比率，检测返回到波长鉴别器的波强与波长鉴别器的特性相结合，确定了光栅返回的波长。 在另一个实施例中，可调谐滤波器用于检测最小返回波能量以提取传感器波长。对于原始光栅波长的参考指示对光栅施加温度或应变。 在另一个实施例中，多个布拉格光栅传感器元件耦合到源和控制器，其中使用包括宽带源，光功率分配器，高灵敏度波长鉴别器的测量系统检测具有布拉格光栅的光纤中的尺寸变化 ，光学检测器和控制器。