Filter with preselected attenuation/wavelength characteristic
    2.
    发明授权
    Filter with preselected attenuation/wavelength characteristic 失效
    滤波器具有预选衰减/波长特性

    公开(公告)号:US5583689A

    公开(公告)日:1996-12-10

    申请号:US347298

    申请日:1995-02-08

    摘要: A filter has a preselected attenuation/wavelength characteristic, in which spatially separated parts of the filter attenuate different wavelengths. The spatially-separated parts have different attenuation characteristics to attenuate different wavelengths in a predetermined manner to provide a selected attenuation/wavelength characteristic. In one arrangement an interference type filter includes a grating, the pitch of which varies spatially. In one instance, the structure to determine the proportion of radiation subject to interference includes a grating of spatially-varying effectiveness, but alternatively it may include an attenuation filter, the attenuation effect of the attenuation layer varying spatially. In another arrangement, the filter may include structure to separate received radiation into a spatially-disposed spectrum, and to attenuate different parts of the spatially-disposed spectrum in such a manner as to provide the selected attenuation/wavelength characteristic.

    摘要翻译: PCT No.PCT / GB93 / 01160 Sec。 371日期1995年2月8日 102(e)日期1995年2月8日PCT提交1993年6月1日PCT公布。 公开号WO93 / 24977 日期1993年12月9日一个滤波器具有预选的衰减/波长特性,其中滤波器的空间分离的部分衰减不同的波长。 空间分离的部分具有不同的衰减特性,以预定的方式衰减不同的波长,以提供选定的衰减/波长特性。 在一种布置中,干涉型滤波器包括其间距在空间上变化的光栅。 在一个实例中,确定受干扰的辐射比例的结构包括空间变化效应的光栅,但是也可以包括衰减滤波器,衰减层的衰减效应在空间上变化。 在另一种布置中,滤波器可以包括将接收的辐射分离成空间上放置的光谱的结构,并且以提供所选择的衰减/波长特性的方式衰减空间上放置的光谱的不同部分。

    Multi-band-pass filter
    4.
    发明授权
    Multi-band-pass filter 失效
    多通道滤波器

    公开(公告)号:US6141469A

    公开(公告)日:2000-10-31

    申请号:US180297

    申请日:1998-11-05

    申请人: Raman Kashyap

    发明人: Raman Kashyap

    IPC分类号: G02B6/34 G02B6/26 G01B9/02

    摘要: A multiple band pass optical filter comprises an interferometer, such as a Michelson interferometer, with de-tuned reflective Bragg gratings 8, 9 that produce multiple, separate, substantially equal reflectivity pass bands for light passing from the interferometer's input port P1 to output port P2.

    摘要翻译: PCT No.PCT / GB98 / 01761 Sec。 371日期:1998年11月5日 102(e)日期1998年11月5日PCT Filed 1998年6月17日PCT公布。 公开号WO98 / 59269 日期:1998年12月30日多频带光学滤波器包括干涉仪,例如迈克尔逊干涉仪,其具有去调谐的反射布拉格光栅8,9,其产生用于从干涉仪输入端口通过的光的多个分开的基本相等的反射通过带 P1输出端口P2。

    Optical waveguide structure
    5.
    发明授权
    Optical waveguide structure 失效
    光波导结构

    公开(公告)号:US6044190A

    公开(公告)日:2000-03-28

    申请号:US68084

    申请日:1998-05-04

    申请人: Raman Kashyap

    发明人: Raman Kashyap

    摘要: An optical fibre is formed with longitudinal recesses (11, 12) which extend toward its core (3) through cladding region (2). The recesses receive electrode structures (20a, b) made of glass, which include tongues (23a, b) that fit into the recesses, on which metal electrode strips (a, b) are formed. A potential difference applied between the strips (a, b) can induce electro-optic effects in the core.

    摘要翻译: PCT No.PCT / GB97 / 00266 Sec。 371日期:1998年5月4日 102(e)日期1998年5月4日PCT 1997年1月30日PCT PCT。 公开号WO97 / 28481 日期1997年8月7日光纤形成有通过包层区域(2)向其芯(3)延伸的纵向凹槽(11,12)。 凹部接收由玻璃制成的电极结构(20a,b),其包括装配到凹部中的形成有金属电极条(a,b)的舌状物(23a,b)。 条带(a,b)之间施加的电位差​​可能会导致核心中的电光效应。

    Method of forming optical fibre gratings
    6.
    发明授权
    Method of forming optical fibre gratings 失效
    形成光纤光栅的方法

    公开(公告)号:US5384884A

    公开(公告)日:1995-01-24

    申请号:US50194

    申请日:1993-05-04

    CPC分类号: G02B6/02128

    摘要: An optical fibre is fixed between a clamp and a piezo-electric translation stage. An argon ion laser emitting at 514.5 nm is used to write Bragg gratings in the fibre. A different longitudinal stress is applied to the fibre before optically writing each Bragg grating. The fibre when unstressed will have a Bragg grating of different peak reflectivity corresponding to the number of different applied stresses.

    摘要翻译: PCT No.PCT / GB91 / 01968 Sec。 371日期:1993年5月4日 102(e)日期1993年5月4日PCT 1991年11月8日PCT PCT。 公开号WO92 / 08999 日期:1992年5月29日。光纤固定在夹具和压电平移台之间。 在514.5nm发射的氩离子激光用于在光纤中写入布拉格光栅。 在光学写入每个布拉格光栅之前,对光纤施加不同的纵向应力。 不受应力时的光纤将具有不同峰值反射率的布拉格光栅,其对应于不同施加应力的数量。

    HIGH-POWER FIBER AMPLIFIER
    7.
    发明申请
    HIGH-POWER FIBER AMPLIFIER 审中-公开
    高功率光纤放大器

    公开(公告)号:US20090231682A1

    公开(公告)日:2009-09-17

    申请号:US12355951

    申请日:2009-01-19

    IPC分类号: H01S3/00

    摘要: Fiber light amplifiers adapted for high power application are provided. In embodiments of the invention, the light signal to be amplified is coupled to a cladding mode of an active waveguide region which is cladding doped. The amplified light is coupled to an output fiber have waveguiding properties matching those of the active cladding of the active waveguide region. In other embodiments, two or more amplifying stages are provided coupled by a wavelength selective loss element which couples the Stokes wave co-propagating with the signal to be amplified out of the signal guiding mode prior to the onset of SRS.

    摘要翻译: 提供适用于大功率应用的光纤放大器。 在本发明的实施例中,要被放大的光信号耦合到作为包层掺杂的有源波导区域的包层模式。 放大的光耦合到具有与有源波导区域的有源包层匹配的波导特性的输出光纤。 在其它实施例中,通过波长选择性损耗元件耦合两个或更多个放大级,该波长选择性损耗元件在SRS发生之前将共同传播的斯托克斯波与要被放大的信号耦合出信号引导模式。

    Plasmon-Polariton Refractive-Index Fiber Bio-Sensor with Fiber Bragg Grating
    8.
    发明申请
    Plasmon-Polariton Refractive-Index Fiber Bio-Sensor with Fiber Bragg Grating 失效
    具有光纤布拉格光栅的等离子体 - 偏振折射率光纤生物传感器

    公开(公告)号:US20080267555A1

    公开(公告)日:2008-10-30

    申请号:US11914637

    申请日:2006-05-15

    IPC分类号: G02B6/00

    摘要: An optical waveguide sensing method and device in which a waveguide layer receives an optical signal and propagates the optical signal in accordance with a predetermined optical waveguide propagation mode. A testing medium surface in communication with the waveguide layer is responsive to a testing medium for modifying at least one characteristic of the propagated optical signal in relation to a given parameter of the testing medium. In this manner, the modified characteristic of the propagated optical signal can be measured in view of determining the given parameter of the testing medium.

    摘要翻译: 一种光波导传感方法和装置,其中波导层接收光信号并根据预定的光波导传播模式传播光信号。 与波导层通信的测试介质表面响应于测试介质,用于相对于测试介质的给定参数修改传播的光信号的至少一个特性。 以这种方式,考虑到确定测试介质的给定参数,可以测量传播的光信号的修改特性。

    Light source
    9.
    发明授权
    Light source 失效
    光源

    公开(公告)号:US07386021B2

    公开(公告)日:2008-06-10

    申请号:US11437791

    申请日:2006-05-22

    申请人: Raman Kashyap

    发明人: Raman Kashyap

    IPC分类号: H01S3/04

    摘要: In a first broad aspect, the invention provides a light source. The light source includes a semiconductor laser for emitting laser light at a first frequency. The light source also includes an optical fibre that includes a fibre Bragg grating. The fibre Bragg grating is optically coupled to the semiconductor laser for receiving the laser light, reflecting a reflected portion of the laser light towards the laser and allowing the transmitted portion of the laser light to pass through the fibre Bragg grating. The fibre Bragg grating has a temperature-dependant reflection spectrum. A frequency converting optical element is optically coupled to the fibre Bragg grating for receiving the transmitted portion of the laser light and converting at least a fraction of the transmitted portion of the laser light into a converted light having a second frequency different from the first frequency. An output port is optically coupled to the frequency converting optical element for outputting the converted light. A temperature controller is thermally coupled to the fibre Bragg grating for modulating a temperature of the fibre Bragg grating so as to modulate the reflection spectrum.

    摘要翻译: 在第一个广泛的方面,本发明提供一种光源。 光源包括用于以第一频率发射激光的半导体激光器。 光源还包括包括光纤布拉格光栅的光纤。 光纤布拉格光栅光学耦合到半导体激光器以接收激光,将激光的反射部分反射向激光器并允许透射的部分激光通过光纤布拉格光栅。 光纤布拉格光栅具有温度依赖反射光谱。 频率转换光学元件光学耦合到光纤布拉格光栅,用于接收激光的透射部分,并将激光的透射部分的至少一部分转换为具有与第一频率不同的第二频率的转换光。 输出端口光耦合到变频光学元件,用于输出转换的光。 温度控制器热耦合到光纤布拉格光栅,用于调制光纤布拉格光栅的温度,以便调制反射光谱。

    Light source
    10.
    发明申请
    Light source 失效
    光源

    公开(公告)号:US20070064756A1

    公开(公告)日:2007-03-22

    申请号:US11437791

    申请日:2006-05-22

    申请人: Raman Kashyap

    发明人: Raman Kashyap

    IPC分类号: H01S5/00

    摘要: In a first broad aspect, the invention provides a light source. The light source includes a semiconductor laser for emitting laser light at a first frequency. The light source also includes an optical fibre that includes a fibre Bragg grating. The fibre Bragg grating is optically coupled to the semiconductor laser for receiving the laser light, reflecting a reflected portion of the laser light towards the laser and allowing the transmitted portion of the laser light to pass through the fibre Bragg grating. The fibre Bragg grating has a temperature-dependant reflection spectrum. A frequency converting optical element is optically coupled to the fibre Bragg grating for receiving the transmitted portion of the laser light and converting at least a fraction of the transmitted portion of the laser light into a converted light having a second frequency different from the first frequency. An output port is optically coupled to the frequency converting optical element for outputting the converted light. A temperature controller is thermally coupled to the fibre Bragg grating for modulating a temperature of the fibre Bragg grating so as to modulate the reflection spectrum.

    摘要翻译: 在第一个广泛的方面,本发明提供一种光源。 光源包括用于以第一频率发射激光的半导体激光器。 光源还包括包括光纤布拉格光栅的光纤。 光纤布拉格光栅光学耦合到半导体激光器以接收激光,将激光的反射部分反射向激光器并允许透射的部分激光通过光纤布拉格光栅。 光纤布拉格光栅具有温度依赖反射光谱。 频率转换光学元件光学耦合到光纤布拉格光栅,用于接收激光的透射部分,并将激光的透射部分的至少一部分转换成具有与第一频率不同的第二频率的转换光。 输出端口光耦合到变频光学元件,用于输出转换的光。 温度控制器热耦合到光纤布拉格光栅,用于调制光纤布拉格光栅的温度,以便调制反射光谱。