利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

21 条记录 (耗时 0.026 秒)

    Method of detecting pilot tones in a noisy signal
    2.
    发明授权
    Method of detecting pilot tones in a noisy signal 有权
    在噪声信号中检测导频音的方法

    公开(公告)号：US07111030B2

    公开(公告)日：2006-09-19

    申请号：US10450515

    申请日：2000-12-20

    申请人： Antti Pietiläinen ,  Mikko Söderlund ,  Simo Tammela

    发明人： Antti Pietiläinen ,  Mikko Söderlund ,  Simo Tammela

    IPC分类号： G06F17/10 ,  H04L27/26

    CPC分类号： H04L27/2647

    摘要： This invention relates to detecting a pilot tone in an optical fiber. In the method described in the invention, computational complexity is reduced significantly by almost completely removing the need to carry out multipli-cations. To calculate certain spectral components of DFT (Discrete Fourier Transform) only a few multiplications are required. The idea is that for de-tecting one pilot tone, it is adequate to calculate one spectral component of DFT if a specific ratio can be chosen between the pilot tone frequency and the sample rate of the receiver.

    摘要翻译： 本发明涉及检测光纤中的导频音。 在本发明中描述的方法中，通过几乎完全消除了执行乘法的需要，显着降低了计算复杂度。 为了计算DFT（离散傅里叶变换）的某些频谱分量，只需要几次乘法。 这个想法是，为了去除一个导频音，如果可以在导频音频率和接收机的采样率之间选择特定比例，则计算DFT的一个频谱分量是足够的。

    Method of producing optical waveguides
    4.
    发明授权
    Method of producing optical waveguides 失效
    制造光波导的方法

    公开(公告)号：US5035734A

    公开(公告)日：1991-07-30

    申请号：US507781

    申请日：1990-04-12

    申请人： Seppo Honkanen ,  Simo Tammela ,  Ari Tervonen

    发明人： Seppo Honkanen ,  Simo Tammela ,  Ari Tervonen

    IPC分类号： G02B6/13 ,  C03C21/00 ,  G02B6/134

    CPC分类号： G02B6/1345

    摘要： The invention relates to a method of producing optical waveguides by ion exchange technique in a glass substrate (1), the ion exchange between a source of ions (such as AgNO.sub.3) and the glass substrate (1) taking place within glass substrate surface areas (6) which do not comprise any ion exchange mask. In the method of the invention, the ion exchange mask is formed by depletion areas (5A, 5B) formed in the surface of the glass substrate.

    Light amplifying fiber arrangement
    5.
    发明授权
    Light amplifying fiber arrangement 有权
    光放大光纤布置

    公开(公告)号：US07559706B2

    公开(公告)日：2009-07-14

    申请号：US11896373

    申请日：2007-08-31

    申请人： Simo Tammela ,  Per Stenius

    发明人： Simo Tammela ,  Per Stenius

    IPC分类号： G02B6/255

    CPC分类号： H01S3/06754 ,  H01S3/06708 ,  H01S3/06729

    摘要： A light-amplifying fiber arrangement including a pump fiber including glass and a bridge element. At least a portion of a side of the bridge element has been fused to at least a portion of a side of the pump fiber. An active fiber includes a light-amplifying core and a first cladding. The first cladding includes glass. At least a portion of a side of the active element has been fused to at least a portion of a side of the bridge element. A second cladding surrounds the pump and active fibers in order to confine pump light to the fibers. The second cladding includes glass. The arrangement allows coupling of high power levels into the pump fiber, wherein splicing of pigtails to the arrangement is easier than e.g. in case of conventional doubly clad fibers.

    摘要翻译： 一种光放大光纤布置，包括包括玻璃和桥接元件的泵浦光纤。 桥元件的侧面的至少一部分已经被熔合到泵浦纤维的一侧的至少一部分上。 有源光纤包括光放大芯和第一包层。 第一个包层包括玻璃。 有源元件的一侧的至少一部分已经被熔合到桥元件的一侧的至少一部分上。 第二包层围绕泵和有源纤维，以将泵浦光限制在纤维上。 第二包层包括玻璃。 该布置允许将高功率水平耦合到泵浦光纤中，其中将尾纤到该布置的接合比例如更容易。 在传统的双包层纤维的情况下。

    Method and device for spectral filtering
    6.
    发明申请
    Method and device for spectral filtering 有权
    频谱滤波的方法和装置

    公开(公告)号：US20050254761A1

    公开(公告)日：2005-11-17

    申请号：US10526667

    申请日：2003-09-04

    申请人： Simo Tammela

    发明人： Simo Tammela

    IPC分类号： G02B6/02 ,  G02B6/34 ,  G02B6/16

    CPC分类号： G02B6/036 ,  G02B6/02 ,  G02B6/02052 ,  G02B6/03605 ,  G02B6/03627 ,  G02B2006/0209

    摘要： A method and a device in optical fiber based spectral filtering. A length of an optical fiber including at least a core region surrounded by a cladding region is coiled over its length in whole or in part to subject the fiber to longitudinal curvature in order to affect the optical transmission properties of the fiber. The fiber is arranged to have radially asymmetric refractive index distribution and in addition to coiling the fiber lengthwise, the fiber is over its length in whole or in part also twisted around its longitudinal axis. The method and device can be used to significantly improve the performance of fiber based filtering devices.

    摘要翻译： 一种基于光纤的频谱滤波的方法和装置。 至少包围由包层区域围绕的纤芯区域的光纤的长度在其长度上被全部或部分卷绕以使纤维纵向弯曲，以便影响纤维的光学传输性能。 纤维被布置成具有径向不对称的折射率分布，并且除了纵向卷绕纤维之外，纤维整个或部分地也围绕其纵向轴线扭转。 该方法和装置可用于显着提高基于光纤的滤波器件的性能。

    System for forming a gas flow of reactants for a doped glass material
    7.
    发明申请
    System for forming a gas flow of reactants for a doped glass material 审中-公开
    用于形成掺杂玻璃材料的反应物气流的系统

    公开(公告)号：US20050069638A1

    公开(公告)日：2005-03-31

    申请号：US10951869

    申请日：2004-09-29

    申请人： Markku Rajala ,  Kauko Janka ,  Simo Tammela ,  Taneli Tuurnala

    发明人： Markku Rajala ,  Kauko Janka ,  Simo Tammela ,  Taneli Tuurnala

    IPC分类号： C03B37/014 ,  C03C21/00 ,  C03C25/60 ,  B05D5/06

    CPC分类号： C03C25/607 ,  C03B37/01413 ,  C03B2201/08 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/36 ,  C03C21/007

    摘要： A system and a method in producing a doped glass material, particularly a glass material to be used in light amplifying optical waveguides. The method comprising: bringing at least a first dopant and a second dopant of the glass material into a vaporous gas phase; controlling the vapour pressure of the gas phase of each dopant by bringing each dopant to a desired temperature which is simultaneously used to control the composition of their gas phase; and mixing each vaporous dopant with the gas flow of the basic material for the glass material, which basic material is also in a gas phase and is used as a carrier gas for the dopants, wherein said basic material and said dopants together constitute the required gas flow of so-called reactants, to be used for producing the glass material; performing the mixing so that said dopants are each mixed in turn with the same gas flow of the basic material in such an order that said desired temperatures of the dopants are increasing in relation to one another.

    摘要翻译： 用于制造掺杂玻璃材料的系统和方法，特别是用于光放大光波导的玻璃材料。 所述方法包括：将所述玻璃材料的至少第一掺杂剂和第二掺杂剂引入气相中; 通过使每种掺杂剂达到同时用于控制其气相组成的所需温度来控制每种掺杂剂的气相的蒸气压; 并且将每种气态掺杂剂与用于玻璃材料的基础材料的气流混合，该基本材料也处于气相中，并且用作掺杂剂的载气，其中所述碱性材料和所述掺杂剂一起构成所需气体 用于生产玻璃材料的所谓反应物流; 进行混合，使得所述掺杂剂各自依次以基本材料的相同气流依次混合，使得掺杂剂的所需温度相对于彼此增加。

    Transmitting supervisory messages from a fiber amplifier
    10.
    发明授权
    Transmitting supervisory messages from a fiber amplifier 失效
    从光纤放大器发送监控消息

    公开(公告)号：US6111687A

    公开(公告)日：2000-08-29

    申请号：US51370

    申请日：1998-04-09

    申请人： Simo Tammela

    发明人： Simo Tammela

    IPC分类号： H04B10/00 ,  H04B10/02 ,  H04B10/077 ,  H04B10/08 ,  H04B10/17 ,  H04B10/291 ,  H01S3/00

    CPC分类号： H04B10/291 ,  H04B10/0777 ,  H04B10/2912 ,  H04B2210/074

    摘要： The present invention is based on the idea that an optical band-pass filter (22) is employed in addition to its normal function for modulating a signal passing through the fiber amplifier on such a low frequency and amplitude that this modulation does not disturb the actual data transmission. This is realized in such a manner that the control signal of the band-pass filter (22), which is used in prior art fiber amplifiers only for optimizing the signal-to-noise ratio, for example, is used in the amplifier of the present invention for modulating the output signal of the fiber amplifier at the rate of a supervisory message.

    摘要翻译： PCT No.PCT / FI96 / 00527 Sec。 371日期：1998年4月9日 102（e）1998年4月9日PCT PCT 1996年10月8日PCT公布。 公开号WO97 / 14233 日期1997年04月17日本发明是基于以下思想：除了其正常功能之外，还采用了光带通滤波器（22），该功能用于以如此低的频率和幅度调制通过光纤放大器的信号，该调制 不干扰实际的数据传输。 这是以这样一种方式来实现的，例如在现有技术中用于优化信噪比的光纤放大器中使用的带通滤波器（22）的控制信号用于 本发明用于以监视消息的速率调制光纤放大器的输出信号。