公开(公告)号：US5748348A

公开(公告)日：1998-05-05

申请号：US554272

申请日：1995-11-06

申请人： Rolf Heidemann ,  Gustav Veith ,  Jurgen Otterbach

发明人： Rolf Heidemann ,  Gustav Veith ,  Jurgen Otterbach

IPC分类号： H04B10/02 ,  H04H20/69 ,  H04J14/02 ,  H04J14/08 ,  H04N7/22

CPC分类号： H04H20/69 ,  H04J14/0298 ,  H04N7/22

摘要： In an optical communication system in which cable-television signals and subscriber-assigned tele-communication signals are transmitted over a passive optical network (4, 5) to at least one optical network termination (6), each optical network termination (6) requires two optical-to-electrical transducers. An optical network termination (6) is disclosed which requires only one optical-to-electrical transducer (24). The system has two transmitting devices (1, 2) which each transmit a respective optical signal (O.sub.TV, O.sub.D). In the second transmitting device (2), a second electric signal (S.sub.D), whose energy occupies a second frequency band (FB2), is processed in such a way that the energy is concentrated in a subband lying outside the first frequency band (FB1) of a first electric signal (S.sub.TV). The optical-to-electrical transducer (24) in the optical network termination (6) converts the received optical signals (O.sub.TV, O.sub.D) to an electric multiplex signal (E.sub.MUX), from which the two electric signals (S.sub.TV, S.sub.D) are recovered.

摘要翻译： 在其中有线电视信号和用户分配的电信号通过无源光网络（4,5）发射到至少一个光网络终端（6）的光通信系统中，每个光网络终端（6）需要 两个光电转换器。 公开了一种仅需要一个光电转换器（24）的光网络终端（6）。 该系统具有两个发送设备（1,2），每个发送设备发送相应的光信号（OTV，OD）。 在第二发送装置（2）中，能量占用第二频带（FB2）的第二电信号（SD）以能量集中在位于第一频带外的子带（FB1 ）第一电信号（STV）。 光网络终端（6）中的光电转换器（24）将所接收的光信号（OTV，OD）转换为电复用信号（EMUX），从其中恢复两个电信号（STV，SD） 。

公开(公告)号：US5719874A

公开(公告)日：1998-02-17

申请号：US547708

申请日：1995-10-19

申请人： Rolf Heidemann ,  Heinz Krimmel ,  Jurgen Otterbach

发明人： Rolf Heidemann ,  Heinz Krimmel ,  Jurgen Otterbach

IPC分类号： H04J3/16 ,  H04J14/08

CPC分类号： H04J3/1647 ,  H04J3/1694 ,  H04J14/08

摘要： In known optical distribution systems, a signal intended for the subscribers is distributed from a transmitting point to all network terminations (point-to-multipoint transmission). The receivers, which are connected to a passive optical network, are adapted to a common bit rate. If a need for a higher data rate arises at a network termination, this need can only be satisfied in the prior art by converting all receivers. This is not possible without interrupting the service. Furthermore, the conversion entails great expense, since the receivers of these network terminations where the need for information is unchanged have to be converted as well. By a time-division-multiplexing method, a time-division multiplex signal is generated which has a frame whose duration is equal to one bit period (T) of a digital signal, and which is divided into k time slots (ZS). At least two time slots (ZS) are used for one digital signal, and one respective time slot (ZS) is used for each of the remaining digital signals.

摘要翻译： 在已知的光分配系统中，用于用户的信号从发射点分发到所有网络终端（点到多点传输）。 连接到无源光网络的接收机适用于公共比特率。 如果在网络终止时需要较高的数据速率，则只需在现有技术中通过转换所有接收机来满足这一需求。 这不可能不中断服务。 此外，转换需要很大的费用，因为这些网络终端的接收者在信息需求不变的情况下也必须被转换。 通过时分多路复用方法，产生时间复用信号，该时分复用信号的持续时间等于数字信号的一个比特周期（T），并被划分为k个时隙（ZS）。 对于一个数字信号使用至少两个时隙（ZS），并且对于每个剩余的数字信号使用一个相应的时隙（ZS）。

公开(公告)号：US5412746A

公开(公告)日：1995-05-02

申请号：US216187

申请日：1994-03-22

申请人： Rolf Rossberg ,  Rainer Fritschi ,  Jurgen Otterbach ,  Rolf Heidemann

发明人： Rolf Rossberg ,  Rainer Fritschi ,  Jurgen Otterbach ,  Rolf Heidemann

IPC分类号： G02B6/28 ,  G02B6/34 ,  G02B6/42 ,  G02B6/00 ,  G02B6/36

CPC分类号： G02B6/29332 ,  G02B6/2821 ,  G02B6/4204 ,  G02B6/4286 ,  G02B6/4287

摘要： A coupler (1) made of optical fibers is provided with a device for detecting the light that is carried in one of the fibers at the coupler output in operation. For that purpose, the coupler (1) embedded in an enclosure (2) has at the coupler output a lens body (8) enclosing the optical fiber (pigtail 6) and a detector (9) aimed at the lens body (8). With the detector, during coupler operation, lost light dissipated via the primary coating of the optical fiber is received by the lens body (8 ) and carried by the detector (9) to an electrical evaluator.

摘要翻译： 由光纤制成的耦合器（1）设置有用于检测在操作中耦合器输出处的光纤之一中承载的光的装置。 为此，嵌入在外壳（2）中的耦合器（1）在耦合器输出处具有围绕光纤（尾纤6）的透镜主体（8）和瞄准透镜体（8）的检测器（9）。 利用检测器，在耦合器操作期间，通过光纤的初级涂层消散的损失的光被透镜体（8）接收并由检测器（9）承载到电子评估器。

公开(公告)号：US5550667A

公开(公告)日：1996-08-27

申请号：US108325

申请日：1993-08-18

申请人： Heinz Krimmel ,  Henning Bulow ,  Rolf Heidemann ,  Jurgen Otterbach

发明人： Heinz Krimmel ,  Henning Bulow ,  Rolf Heidemann ,  Jurgen Otterbach

IPC分类号： H04B10/2537 ,  H04B10/04

CPC分类号： H04B10/2537

摘要： A laser (2) of an optical transmitter (1) for the transmission of an analog broadband signal for CATV in particular, can be amplitude-modulated in two different manners with an intelligence signal (N). Direct modulation can lead to an undesired additional frequency modulation. With indirect modulation by means of an optical intensity modulator (3), Brillouin scattering occurs at powers of approximately 10 mW in an optical fiber of the transmission path connected to the optical transmitter (1). Both modulations lead to distortions of the transmitted signal. In order to avoid the disadvantages of both modulations in a technically simple fashion, the carrier emitted from a laser (2) is indirectly modulated with an intelligence signal (N) and the laser (2) also faintly directly modulated with an energy-dispersing signal (V). The faint direct modulation leads to a constant, limited wave length alteration of the optical signal, such that Brillouin scattering is reduced, simultaneously with the avoidance of dispersion distortions.

摘要翻译： 用于传输CATV的模拟宽带信号的光发射机（1）的激光器（2）可以用智能信号（N）以两种不同的方式进行幅度调制。 直接调制可能导致不需要的附加频率调制。 通过利用光强度调制器（3）的间接调制，在连接到光发送器（1）的传输路径的光纤中，约为10mW的功率发生布里渊散射。 两种调制都会导致发送信号的失真。 为了避免技术上简单的两种调制的缺点，从激光器（2）发射的载体用智能信号（N）间接调制，激光器（2）也用能量分散信号微弱地直接调制 （V）。 微弱的直接调制导致光信号的恒定的有限波长变化，使得布里渊散射减小，同时避免色散失真。

公开(公告)号：US5297154A

公开(公告)日：1994-03-22

申请号：US56305

申请日：1993-04-30

申请人： Rolf Heidemann ,  Jurgen Otterbach

发明人： Rolf Heidemann ,  Jurgen Otterbach

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/094 ,  H01S3/10 ,  H01S5/062 ,  H01S3/30 ,  G02B6/26 ,  H01S3/00

CPC分类号： H01S3/094003 ,  H01S5/06209 ,  H01S3/094011 ,  H01S3/094069 ,  H01S5/0652

摘要： Prior art fiber-optic amplifiers which are used in a fiber-optic link to amplify the light signals to be transmitted have the disadvantage that the semiconductor lasers employed as pump lasers are highly sensitive to feedback, so that the stability of the light-signal transmission is impaired by pump light reflected back into the pump lasers.According to the invention, the operating current for such pump lasers (4) contains a noise current, so that the pump laser emits its pump light in many modes, which makes it insensitive to feedback.To prevent the noise component of the pump light which is caused by the noise current from affecting the amplification of the light signals to be transmitted, the noise current is filtered in such a way that its spectral components have frequencies which lie above the reciprocal lifetime of that energy level of the active laser medium which causes the amplification of the light signals.

摘要翻译： 在光纤链路中用于放大要发射的光信号的现有技术的光纤放大器具有作为泵浦激光器使用的半导体激光器对反馈高度敏感的缺点，因此光信号传输的稳定性 被反射回泵浦激光器的泵浦光损伤。 根据本发明，这种泵浦激光器（4）的工作电流包含噪声电流，使得泵激光器以许多模式发射其泵浦光，这使其对反馈不敏感。 为了防止由噪声电流引起的泵浦光的噪声分量影响要传输的光信号的放大，噪声电流被滤波，使得其频谱分量的频率高于 导致放大光信号的有源激光介质的能级。

公开(公告)号：US5475521A

公开(公告)日：1995-12-12

申请号：US58454

申请日：1993-05-06

申请人： Rolf Heidemann

发明人： Rolf Heidemann

IPC分类号： G02F1/35 ,  H01S3/094 ,  H01S3/13 ,  H01S3/131 ,  H04B10/291 ,  H04B10/293 ,  H04B10/17

CPC分类号： H04B10/2931 ,  H04B10/2912 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/10015

摘要： If, in optical communication systems using fiber-optic amplifiers, the optical isolator at the input is omitted on cost grounds and because of the deterioration of the noise characteristics caused by the insertion loss, a giant pulse may be developed when a fiber-optic connector at the input is being separated. To avoid this occurrence, use is made of a monitoring device (7) which, when the power input to the fiber-optic amplifier (4, 5, 3, 6) drops below a given threshold, quickly turns off the current of the pump laser (4) or interrupts the light path of the pump laser (4).

摘要翻译： 如果在使用光纤放大器的光通信系统中，输入端的光隔离器在成本上被忽略，并且由于由插入损耗引起的噪声特性的恶化，则当光纤连接器 在输入被分离。 为了避免这种情况的发生，使用监视装置（7），当光纤放大器（4,5,3,6）的电力输入下降到低于给定阈值时，快速关闭泵的电流 激光（4）或中断泵激光器（4）的光路。

公开(公告)号：US5363385A

公开(公告)日：1994-11-08

申请号：US20083

申请日：1993-02-19

申请人： Rolf Heidemann

发明人： Rolf Heidemann

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/094 ,  H01S3/13 ,  H01S3/131 ,  H01S3/30 ,  H01S3/091

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/09415 ,  H01S5/0612

摘要： A fiber-optic amplifier for use with optical communications systems includes a light waveguide piece for amplifying an optical input signal. A pump light source is coupled to the amplifying light waveguide piece and includes a semiconductor laser for generating pump light for the amplifying light waveguide piece. A control device regulates the wavelength of the pump light generated by the semiconductor laser to be within a desired wavelength range so that the pump light is maximally absorbed in the amplifying light waveguide piece.

摘要翻译： 用于光通信系统的光纤放大器包括用于放大光输入信号的光波导片。 泵浦光源耦合到放大光波导片，并且包括用于产生用于放大光波导片的泵浦光的半导体激光器。 控制装置将由半导体激光器产生的泵浦光的波长调节到期望的波长范围内，使得泵浦光在放大光波导片中被最大程度地吸收。

公开(公告)号：US5091985A

公开(公告)日：1992-02-25

申请号：US640799

申请日：1991-01-16

申请人： Rolf Heidemann

发明人： Rolf Heidemann

IPC分类号： G02B6/122 ,  G02B6/34 ,  G02B6/42 ,  G02B6/43 ,  H04B10/12 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14 ,  H05K7/14 ,  H05K7/18

CPC分类号： G02B6/43 ,  G02B6/34 ,  G02B6/4246

摘要： In a signal connecting device for the establishment of communication paths between insertable units in a rack in which signal connections are formed by at least one optical waveguide which is associated with a rear panel of the rack, coupling is effected by imaging lenses associated with the insertable units. When a unit is inserted, its associated lenses are disposed opposite or lie against the optical waveguide of the rear panel.

摘要翻译： 在信号连接装置中，用于建立在机架中的可插入单元之间的通信路径，其中信号连接由与机架的后面板相关联的至少一个光波导形成，通过与可插入的相关联的成像透镜 单位。 当插入单元时，其相关联的透镜与后面板的光波导相对或相对设置。

公开(公告)号：US06320878B1

公开(公告)日：2001-11-20

申请号：US08971971

申请日：1997-11-17

申请人： Heinz Krimmel ,  Rainer Fritschi ,  Rolf Heidemann

发明人： Heinz Krimmel ,  Rainer Fritschi ,  Rolf Heidemann

IPC分类号： H04J102

CPC分类号： H04N7/22 ,  H04N7/17309

摘要： In a hybrid fiber/coax access network (NET) with downstream and upstream channels, the upstream channel serves to transmit voice and video signals as well as data signals from groups of customer locations (END) to a subcenter (HUB). A demarcation point (UP) provides the interface between the access network (NET) and the private network of the customer location (END). It contains at least two devices (BP4, BP5, BP6) for frequency-splitting received signals in the upstream frequency band, at least two switches (S4, S5, S6) following the at least two devices (BP4, BP5, BP6) and serving to block or unblock individual upstream frequency ranges, a measuring unit (MESS2) for measuring the amplitudes or intensities of the signals in the split frequency ranges, and a control unit (CTRL) for evaluating the measured values and controlling the at least two switches (S4, S5, S6). For a customer location (END), individual upstream frequency ranges can thus be telemetrically blocked for a limited time. Decentralized and autonomous monitoring of individual upstream frequency ranges is accomplished by a measuring unit which is controlled by the demarcation point (UP) itself.

摘要翻译： 在具有下行和上行信道的混合光纤/同轴电缆接入网络（NET）中，上行信道用于将语音和视频信号以及从客户位置组（END）的数据信号传输到子中心（HUB）。 分界点（UP）提供访问网络（NET）和客户位置（END）的专用网络之间的接口。 它包含用于在上行频带中分频接收信号的至少两个装置（BP4，BP5，BP6），至少两个装置（BP4，BP5，BP6）之后的至少两个开关（S4，S5，S6）和 用于阻断或解除单个上游频率范围的测量单元（MESS2），用于测量分离频率范围内的信号的幅度或强度的测量单元（MESS2），以及用于评估测量值并控制至少两个开关的控制单元（CTRL） （S4，S5，S6）。 对于客户位置（END），单个上游频率范围可以在有限的时间内被遥测。 单独的上行频率范围的分散和自主监控由测量单元完成，该测量单元由分界点（UP）本身控制。

公开(公告)号：US5521752A

公开(公告)日：1996-05-28

申请号：US217359

申请日：1994-03-24

申请人： Rolf Heidemann ,  Bernhard Junginger

发明人： Rolf Heidemann ,  Bernhard Junginger

IPC分类号： H01S3/00 ,  H01S3/06 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/102 ,  H01S3/131 ,  H04B10/077 ,  H04B10/079 ,  H04B10/291 ,  H04B10/08

CPC分类号： H04B10/291 ,  H01S3/094003 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/2912 ,  H01S3/0014 ,  H01S3/1022 ,  H01S3/1315

摘要： The input light in fiber-optic amplifiers is monitored in order to turn off the system in which it is contained, or individual components of the system, e.g. the fiber-optic amplifier itself, when input light is lacking. To that effect, in known fiber-optic amplifiers, a portion of the input light is coupled out by a coupler. However, this coupler has disadvantages; e.g. the signal-to-noise ratio deteriorates. To monitor the input light, the fiber-optic amplifier of the present invention uses a device (4), which couples out and evaluates the pump light that was not absorbed by the section of the optical waveguide (2).

摘要翻译： 监视光纤放大器中的输入光，以便关闭其中所包含的系统或系统的各个部件，例如， 光纤放大器本身，当输入光不足时。 为此，在已知的光纤放大器中，输入光的一部分由耦合器耦合出来。 然而，这种耦合器有缺点; 例如 信噪比恶化。 为了监视输入光，本发明的光纤放大器使用一个装置（4），该装置耦合出并且评估不被光波导（2）的部分吸收的泵浦光。