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120 条记录 (耗时 0.05 秒)

    Photonic crystal structure sensor
    42.
    发明授权
    Photonic crystal structure sensor 有权
    光子晶体结构传感器

    公开(公告)号：US07630589B2

    公开(公告)日：2009-12-08

    申请号：US11971714

    申请日：2008-01-09

    申请人： Onur Kilic ,  Michel J. F. Digonnet ,  Gordon S. Kino ,  Olav Solgaard ,  Shrestha Basu Mallick ,  Onur Can Akkaya

    发明人： Onur Kilic ,  Michel J. F. Digonnet ,  Gordon S. Kino ,  Olav Solgaard ,  Shrestha Basu Mallick ,  Onur Can Akkaya

    IPC分类号： G02B6/00

    CPC分类号： G01H9/004 ,  G02B6/264

    摘要： An acoustic sensor and a method of fabricating an acoustic sensor are provided. The acoustic sensor includes at least one photonic crystal structure and an optical fiber having an end optically coupled to the at least one photonic crystal structure. The acoustic sensor further includes a structural portion mechanically coupled to the at least one photonic crystal structure and to the optical fiber. The at least one photonic crystal structure, the optical fiber, and the structural portion substantially bound a region having a volume such that a frequency response of the acoustic sensor is generally flat in a range of acoustic frequencies.

    摘要翻译： 提供声传感器和制造声传感器的方法。 声传感器包括至少一个光子晶体结构和具有光学耦合到至少一个光子晶体结构的端部的光纤。 声学传感器还包括机械耦合到至少一个光子晶体结构和光纤的结构部分。 至少一个光子晶体结构，光纤和结构部分基本上结合了具有音量的区域，使得声学传感器的频率响应在声频范围内通常是平坦的。

    Multiple-core photonic-bandgap fiber with coupling between the cores
    43.
    发明授权
    Multiple-core photonic-bandgap fiber with coupling between the cores 有权
    核心之间具有耦合的多核光子带隙光纤

    公开(公告)号：US07551819B2

    公开(公告)日：2009-06-23

    申请号：US11681019

    申请日：2007-03-01

    申请人： Vinayak Dangui ,  Michel J. F. Digonnet ,  Gordon S. Kino

    发明人： Vinayak Dangui ,  Michel J. F. Digonnet ,  Gordon S. Kino

    IPC分类号： G02B6/26 ,  G02B6/42 ,  G02B6/00 ,  G02B6/02 ,  G02B6/028

    CPC分类号： G02B6/02042 ,  G02B6/02328 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/2821

    摘要： An optical coupler includes a first optical port, a second optical port, a third optical port, and a fourth optical port. The optical coupler further includes a photonic-bandgap fiber having a cladding, a first core, and a second core. The cladding includes a material with a first refractive index and regions within the cladding. The regions have a second refractive index lower than the first refractive index. The first core is substantially surrounded by the cladding. The first core is optically coupled to the first optical port and to the second optical port. The second core is substantially surrounded by the cladding. The second core is optically coupled to the third optical port and to the fourth optical port. At least a portion of the first core is generally parallel to and spaced from at least a portion of the second core such that the first core is optically coupled to the second core. The first core, the second core, or both the first core and the second core is hollow.

    摘要翻译： 光耦合器包括第一光口，第二光口，第三光口和第四光口。 光耦合器还包括具有包层，第一芯和第二芯的光子带隙光纤。 包层包括具有第一折射率的材料和包层内的区域。 这些区域具有低于第一折射率的第二折射率。 第一芯基本上被包层包围。 第一核心光耦合到第一光端口和第二光端口。 第二芯基本上被包层包围。 第二核心光耦合到第三光端口和第四光端口。 第一芯的至少一部分通常与第二芯的至少一部分平行并间隔开，使得第一芯与光学耦合到第二芯。 第一核心，第二核心或第一核心和第二核心都是空心的。

    Method of amplifying optical signals using doped materials with extremely broad bandwidths
    45.
    发明授权
    Method of amplifying optical signals using doped materials with extremely broad bandwidths 失效
    使用具有极宽带宽的掺杂材料放大光信号的方法

    公开(公告)号：US06906855B2

    公开(公告)日：2005-06-14

    申请号：US10885424

    申请日：2004-07-06

    申请人： Yannick G. Feillens ,  Michel J. F. Digonnet ,  Martin M. Fejer

    发明人： Yannick G. Feillens ,  Michel J. F. Digonnet ,  Martin M. Fejer

    IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/16 ,  H01S3/00

    CPC分类号： H01S3/06754 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/094011 ,  H01S3/094096 ,  H01S3/1608 ,  H01S3/1643

    摘要： In a method of amplifying optical input signals over a wide bandwidth, the optical input signals are applied to an optical waveguide made from a rare-earth-doped amorphous material (e.g., erbium-doped SrY4(SiO4)3O material). The optical input signals include optical signals having wavelengths over a range of approximately 125 nanometers. Pump light is applied to the optical waveguide to cause the waveguide to provide optical gain to the optical input signals. The optical gain causes the optical signals to be amplified within the waveguide to provide amplified optical signals over approximately a 125-nanometer range, including, in particular, optical signals having wavelengths at one end of the range and optical signals having wavelengths at a second end of the range.

    摘要翻译： 在宽带宽放大光输入信号的方法中，光输入信号被施加到由稀土掺杂的非晶材料制成的光波导（例如掺杂铒的SrY 4（SiO 3 O 3）O 3）。 光输入信号包括波长在大约125纳米范围内的光信号。 泵浦光被施加到光波导以使波导对光输入信号提供光增益。 光学增益使得光信号在波导内被放大，以在大约125纳米范围内提供放大的光信号，特别是包括在该范围的一端具有波长的光信号和在第二端具有波长的光信号 的范围。

    Optical sensor array having multiple rungs between distribution and return buses and having amplifiers in the buses to equalize return signals
    46.
    发明授权
    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.

    Broadband laser source
    47.
    发明授权
    Broadband laser source 失效
    宽带激光源

    公开(公告)号：US5189676A

    公开(公告)日：1993-02-23

    申请号：US403703

    申请日：1989-09-06

    申请人： Paul F. Wysocki ,  Michel J. F. Digonnet ,  Byoung Y. Kim

    发明人： Paul F. Wysocki ,  Michel J. F. Digonnet ,  Byoung Y. Kim

    IPC分类号： H01S3/067

    CPC分类号： H01S3/06795

    摘要： A laser source comprises an optical fiber doped with a homogeneously broadened lasing medium, preferably with Erbium, pumped by a laser pump source and an intracavity acousto-optic modulator. When the acousto-optic modulator is driven by a variable frequency source, the Erbium fluorescence line emitted by the Erbium-doped optical fiber can be electronically tuned. In another embodiment, an electronic sweep waveform is used to frequency modulate the acoustic signal produced by the acousto-optic modulator. Without the low-rate frequency modulation, Erbium in a silica optical fiber is a mostly homogeneously broadened gain medium with a narrow laser linewidth. When measured on a long time scale, low-rate frequency modulation provides a broader spectral width, on the order of 19 nm, which makes such a source on an ideal source for certain optical applications such as fiber optic gyroscopes.

    摘要翻译： 激光源包括掺杂有均匀扩展的激光介质的光纤，优选地由铒掺杂，由激光泵浦源和腔内声光调制器泵浦。 当声光调制器由可变频率源驱动时，掺铒光纤发射的铒荧光线可以被电子调谐。 在另一个实施例中，使用电子扫描波形来对由声光调制器产生的声信号进行频率调制。 在没有低速率频率调制的情况下，二氧化硅光纤中的铒是激光线宽窄的大部分均匀的增宽介质。 当在长时间尺度上测量时，低速率频率调制提供了更宽的光谱宽度，大约为19nm，这使得这样的光源成为诸如光纤陀螺仪之类的某些光学应用的理想光源。

    Integrated optical waveguide utilizing zinc oxide diffused into congruent and magnesium oxide doped lithium niobate crystals
    48.
    发明授权
    Integrated optical waveguide utilizing zinc oxide diffused into congruent and magnesium oxide doped lithium niobate crystals 失效
    使用氧化锌的集成光波导扩散到掺杂铌酸锂的铌酸锂晶体中

    公开(公告)号：US5095518A

    公开(公告)日：1992-03-10

    申请号：US566153

    申请日：1990-08-10

    申请人： Whu-ming Young ,  Martin M. Fejer ,  Robert S. Feigelson ,  Michel J. F. Digonnet

    发明人： Whu-ming Young ,  Martin M. Fejer ,  Robert S. Feigelson ,  Michel J. F. Digonnet

    IPC分类号： G02B6/134

    CPC分类号： G02B6/1342

    摘要： An integrated optical waveguide is constructed from a lithium niobate (LiNbO.sub.3) crystal substrate. In preferred embodiments, a diffused layer is formed proximate to one surface of the substrate by sputtering a thin layer of a zinc-related oxide (e.g., ZnO, ZnLiNbO.sub.4, or the like) onto the surface and then annealing the substrate. The resulting concentration of zinc in the diffused layer forms a waveguide having desirable optical propagation characteristics. The substrate is preferably congruent lithium niobate. In particularly preferred embodiments, the substrate is magnesium oxide (MgO) doped lithium niobate.

    摘要翻译： 集成光波导由铌酸锂（LiNbO 3）晶体基板构成。 在优选实施例中，通过将锌相关氧化物（例如ZnO，ZnLiNbO 4等）的薄层溅射到表面上，然后对衬底进行退火，在衬底的一个表面附近形成扩散层。 所得到的扩散层中锌的浓度形成具有理想的光传播特性的波导。 所述底物优选是一致的铌酸锂。 在特别优选的实施方式中，衬底是掺杂了氧化镁（MgO）的铌酸锂。

    Broadband optical fiber laser
    49.
    发明授权
    Broadband optical fiber laser 失效
    宽带光纤激光器

    公开(公告)号：US4964131A

    公开(公告)日：1990-10-16

    申请号：US319241

    申请日：1989-03-09

    申请人： Karen Liu ,  Byoung Y. Kim ,  Michel J. F. Digonnet ,  Kenneth A. Fesler ,  Herbert J. Shaw

    发明人： Karen Liu ,  Byoung Y. Kim ,  Michel J. F. Digonnet ,  Kenneth A. Fesler ,  Herbert J. Shaw

    IPC分类号： G01C19/72 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941

    CPC分类号： G01C19/721 ,  H01S3/06795 ,  H01S3/0941 ,  H01S3/094003

    摘要： An optical fiber laser includes a single-mode optical fiber doped with a lasing material such as Neodymium. The optical fiber is pumped with a pump optical signal having a pump wavelength selected to cause spontaneous emission of an optical signal at a second wavelength different from the pump wavelength. The optical fiber is formed into a laser cavity such as by including a suitable reflector at each of the two ends of a suitable length of the optical fiber so that the emitted optical signal oscillates therein. One of the reflectors has a reflectivity at the wavelength of the emitted light so that most (e.g., approximately 95%) of the emitted light is reflected back into the laser cavity and a smaller portion (e.g, approximately 5%) is transmitted through the mirror as a laser output signal. Alternatively, the optical fiber can be formed into a ring laser structure using an optical coupler that couples a substantial portion (e.g., approximately 95%) of the emitted light back into the ring for recirculation therein and provides a smaller portion of the emitted light (e.g., approximately 5%) as a laser output signal. The wavelength of the pump optical signal is selected to be outside the pump variable tuning range of the Neodymium-doped optical fiber (i.e., the range of pump wavelengths which stimulate emitted wavelengths having a average wavelengths with a generally one-to-one correspondence to the pump wavelength). Pumping with a pump signal outside the pump variable tuning ranges causes the emitted light to have a broad spectral envelope of longitudinal modes having emission wavelengths corresponding to substantially all the pump variable tuning range. Thus, by pumping the optical fiber with a single pump wavelength, a broadband laser output signal is generated.

    摘要翻译： 光纤激光器包括掺杂有诸如钕的激光材料的单模光纤。 用选择了泵浦波长的泵浦光信号来泵浦光纤，以引起与泵浦波长不同的第二波长的光信号的自发发射。 光纤被形成为激光腔，例如通过在光纤的适当长度的两端中的每一端包括合适的反射器，使得所发射的光信号在其中振荡。 反射器中的一个在发射光的波长处具有反射率，使得大部分（例如，大约95％）的发射光被反射回到激光腔中，并且较小的部分（例如，大约5％）通过 镜像为激光输出信号。 或者，可以使用光耦合器将光纤形成为环形激光器结构，所述光耦合器将发射的光的大部分（例如，大约95％）重新连接到环中以在其中再循环，并且提供较小部分的发射光 例如约5％）作为激光输出信号。 泵浦光信号的波长被选择在掺杂钕光纤的泵可变调谐范围之外（即，泵浦波长的范围，其激发平均波长与一般一一对应的发射波长 泵浦波长）。 在泵可变调谐范围之外用泵浦信号泵送使得发射的光具有宽泛的光谱包络，其具有与基本上所有泵可变调谐范围对应的发射波长的纵向模式。 因此，通过用单个泵浦波长泵浦光纤，产生宽带激光输出信号。