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    • 2. 发明授权
    • Photothermal optical switch and variable attenuator
    • 光电光开关和可变衰减器
    • US06493478B1
    • 2002-12-10
    • US09727004
    • 2000-11-30
    • Michael E. DeRosaCeline C. GuermeurStephen L. LoguovMarc MoroniGuilhem M. Vidiella
    • Michael E. DeRosaCeline C. GuermeurStephen L. LoguovMarc MoroniGuilhem M. Vidiella
    • G02B626
    • G02F1/225G02F1/0126G02F1/0147G02F1/061G02F1/3137G02F2202/022G02F2203/48
    • An optical device which utilizes a photothermal optical effect to achieve switching or attenuation includes a waveguide defined by a waveguide core and a surrounding cladding, wherein the polymer waveguide core includes a region consisting of a photothermally responsive material having an absorption coefficient at a switch wavelength or attenuation wavelength that is higher than an absorption coefficient at a signal wavelength. Switching devices include an optical splitter circuit having a branch that includes the photothermally responsive material, and either a multiplexer for introducing light at the switch wavelength into the optical circuit or a light source focused at the photothermally responsive material. Attenuating devices include a Mach-Zehnder type interferometer having a branch that includes the photothermally responsive material and either a multiplexer for introducing light at the attenuation wavelength into the optical circuit or a light source focused at the photothermally responsive material.
    • 利用光热效应实现切换或衰减的光学装置包括由波导芯和周围包层限定的波导,其中聚合物波导芯包括由在开关波长处具有吸收系数的光热响应材料组成的区域,或 衰减波长比信号波长处的吸收系数高。 开关装置包括具有包括光热响应材料的分支的光分路器电路,以及用于将开关波长的光引入光电路的多路复用器或聚焦在光热响应材料处的光源。 衰减装置包括具有包括光热响应材料的分支的马赫 - 曾德尔型干涉仪,以及用于将衰减波长的光引入光电路的多路复用器或聚焦在光热响应材料处的光源。
    • 4. 发明授权
    • Photothermal optical signal limiter
    • 光电光信号限制器
    • US06415075B1
    • 2002-07-02
    • US09741945
    • 2000-12-20
    • Michael E. DeRosaStephen J. CaracciDana C. BookbinderThomas M. LeslieStephan L. Logunov
    • Michael E. DeRosaStephen J. CaracciDana C. BookbinderThomas M. LeslieStephan L. Logunov
    • G02B626
    • G02F1/0147G02B6/264
    • An optical signal limiter is provided for limiting transmission of a continuous wave optical signal that exceeds a preselected threshold power level. The limiter includes a body having input and output ends that is formed at least in part from a material having a negative thermal index coefficient of between about −0.5×10−4 °C.−1 and −4.0×10−4 °C.−1 and an absorption coefficient of between 1.0 to 5.0 dB/cm at wavelengths between 980-1650 nm. The limiter also includes collimating fibers mounted on the input and output ends to minimize low power signal losses across the limiter body. It may be installed at a junction between two optical fibers and is preferably formed from a curable adhesive having the aforementioned negative thermal index coefficient to obviate the need for separate bonding materials and joining steps during the installation of the limiter. The optical limiter is reusable and with a recovery time of 1-5 milliseconds advantageously prevents power surges in optical circuits from damaging sensitive optical components by limiting the amplitude of such surges within 0.2-0.5 milliseconds.
    • 提供光信号限制器用于限制超过预选阈值功率电平的连续波光信号的传输。 限制器包括具有输入和输出端的主体,其至少部分地由具有在约-0.5×10 -4℃-1和-4.0×10 -4℃-1之间的负热指数系数的材料形成 并且在980-1650nm之间的波长处的吸收系数为1.0至5.0dB / cm。 限幅器还包括安装在输入和输出端的准直光纤,以最小化跨限幅器主体的低功率信号损耗。 其可以安装在两根光纤之间的连接处,并且优选由具有上述负热指数系数的可固化粘合剂形成,以避免在安装限制器期间分离的接合材料和接合步骤的需要。 光限制器是可重复使用的,并且具有1-5毫秒的恢复时间有利地通过将这种浪涌的幅度限制在0.2-0.5毫秒内来有效地防止光电路中的功率浪涌损坏敏感光学部件。
    • 6. 发明授权
    • Waveguides and method of making them
    • 波导及其制作方法
    • US06744951B2
    • 2004-06-01
    • US09850341
    • 2001-05-07
    • Steven B. DawesMichael E. DeRosaRobert J. Hagerty
    • Steven B. DawesMichael E. DeRosaRobert J. Hagerty
    • G02B626
    • G02B6/12011C09D4/06G02B6/12028G02B6/24G02B6/3801C08F259/08
    • A method of coupling optical waveguides comprising the steps of: (i) providing at least one pair of waveguides located such that (a) light radiation propagating through one of the waveguides will be at least partially coupled to a corresponding waveguide and, (b) these waveguides are separated by a gap of about 2 &mgr;m to about 500 &mgr;m long; the waveguides having positive dn/dT; (ii) filling the gap with a photo-polymerizable composition, the composition having dn/dT of −2×10−4/C to −4×10−4/C; (iii) providing simultaneous photo-radiation through said waveguides, wherein the photo-radiation photo-polymerizes the composition, thereby (a) creating a first region bridging between the waveguides, the first region having a first index of refraction, and (b) a second region encapsulating the first region, the second region having a second index of refraction, such that said first index of refraction of the first region is at least 0.1% higher than the second index of refraction; and (iv) curing the remaining composition, while retaining an index difference of at least 0.1% between the first region and the second region.
    • 一种耦合光波导的方法,包括以下步骤:(i)提供至少一对波导,其定位成使得(a)通过波导中的一个传播的光辐射将至少部分地耦合到相应的波导,并且(b) 这些波导由约2μm至约500μm的间隙隔开; 波导具有正的dn / dT; (ii)用可光聚合组合物填充间隙,该组合物的dn / dT为-2×10 -4 / 4至4×10 -4 /℃; (iii)通过所述波导提供同时的光辐射,其中所述光辐射光聚合所述组合物,从而(a)产生桥接在所述波导之间的第一区域,所述第一区域具有第一折射率,和(b) 封装所述第一区域的第二区域,所述第二区域具有第二折射率,使得所述第一区域的所述第一折射率比所述第二折射率高至少0.1%; 和(iv)固化剩余的组合物,同时保持第一区域和第二区域之间的至少0.1%的折射率差异。