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公开(公告)号：US4748689A
公开(公告)日：1988-05-31
申请号：US889976
申请日：1986-07-24
申请人： Friedemann Mohr
发明人： Friedemann Mohr
CPC分类号： H04H20/69 , H04M1/003 , H04Q11/0478 , H04J2203/0046
摘要： A fiber-optic distribution system is disclosed which distributes broadband signals received by a network termination circuit from a broadband communications network (B-ISDN or cable-television network) among a plurality of subscriber terminals. The network termination circuit (4) contains devices for separating a forward channel and a backward channel. It also includes electric-to-optical and optical-to-electric transducers (5,6). The distribution system contains a fiber-optic multi-port coupler (10) which is made by the fusion technique and interconnects a plurality of optical fibers (12, 13, 14). On the subscriber's side, each of these optical fibers forms the forward channel and the backward channel for one of the terminals (32). On the network side, one of these optical fibers (16) forms the forward channel for the broadband signals, and all other optical fibers (17, 18) are combined to form the narrow-band backward channel. They are connected to a common large-area photodiode (6). As the backward channel is a narrow-band channel, the fact that large-area photodiodes, such as PIN diodes, are relatively slow does not cause any bandwidth problems.
摘要翻译： 公开了一种光纤分配系统，其分配由多个用户终端中的宽带通信网络（B-ISDN或有线电视网络）由网络终端电路接收的宽带信号。 网络终端电路（4）包含用于分离前向信道和反向信道的设备。 它还包括电光和光电转换器（5,6）。 分配系统包含通过融合技术制造并互连多个光纤（12,13,14）的光纤多端口耦合器（10）。 在用户侧，这些光纤中的每一个形成用于端子（32）中的一个的正向通道和反向通道。 在网络侧，这些光纤（16）中的一个形成用于宽带信号的前向信道，并且所有其它光纤（17,18）被组合以形成窄带反向信道。 它们连接到公共的大面积光电二极管（6）。 由于反向通道是窄带通道，因此大面积光电二极管（如PIN二极管）相对较慢的事实不会导致任何带宽问题。
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2.发明授权
公开(公告)号：US4955014A
公开(公告)日：1990-09-04
申请号：US115254
申请日：1987-10-30
申请人： Dieter Kuppers , Klaus Herse , Kate Hiepe-Wohlleben , Manfred Kaiser , Friedemann Mohr , Horst Ohnsorge
发明人： Dieter Kuppers , Klaus Herse , Kate Hiepe-Wohlleben , Manfred Kaiser , Friedemann Mohr , Horst Ohnsorge
IPC分类号： G02B6/42 , H04B10/25 , H04B10/2581 , H04Q11/00
CPC分类号： H04B10/2581 , G02B6/4212 , H04B10/2503 , H04Q11/0001
摘要： For short-distance communication systems, particularly for optical-waveguide links in the subscriber area, it is proposed to operate the standard single-mode optical waveguide for long-distance applications, which is optimized for the wavelength range from 1300 nm to 1600 nm, with optical transmitters and optical receivers whose operating wavelengths lie clearly below the cutoff wavelength of the optical waveguide. By means of a suitable stable laser-waveguide coupling, it is ensured that single-mode operation is achieved, which is necessary to transmit digital signals at high bit rates. The increased loss of the optical waveguide at 800 nm can be accepted because of the relatively short length of subscriber lines. Both unidirectional and bidirectional transmission over a single optical waveguide using wavelength-division or modal multiplexing is possible.
摘要翻译： 对于短距离通信系统，特别是对于用户区域中的光波导链路，建议对长距离应用的标准单模光波导进行操作，其针对1300nm至1600nm的波长范围进行优化， 其光发射机和光接收机的工作波长明显低于光波导的截止波长。 通过合适的稳定的激光波导耦合，确保实现单模操作，这是以高比特率传输数字信号所必需的。 由于用户线路的长度相对较短，可以接受800nm处的光波导的增加的损耗。 使用波分复用或模式复用的单个光波导上的单向和双向传输都是可能的。
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3.发明授权Optical fiber coil having juxtaposed ends in same or adjacent layers for rotation rate measuring instrument 失效光纤线圈在相同或相邻的层中具有并置端，用于旋转速率测量仪器
公开(公告)号：US4699451A
公开(公告)日：1987-10-13
申请号：US645987
申请日：1984-08-31
申请人： Friedemann Mohr
发明人： Friedemann Mohr
CPC分类号： G01C19/722 , Y10S359/90
摘要： An optical fiber is coiled in an instrument in such a way that its beginning and its end belong to the same layer or to adjacent layers and are close together.
摘要翻译： 光纤被卷绕在仪器中，使得其开始和结束属于相同的层或相邻的层并且靠近在一起。
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公开(公告)号：US4591269A
公开(公告)日：1986-05-27
申请号：US555905
申请日：1983-11-29
申请人： Friedemann Mohr
发明人： Friedemann Mohr
CPC分类号： G01C19/726
摘要： In the rotation rate measuring instrument, two component beams derived from a light beam produced by a laser circulate around a coiled optical waveguide (radius R, length L) in opposite directions. From the phase difference between the two component beams due to the Sagnac effect, the rotation rate is determined. Before entering the optical waveguide, each of the two component beams is modulated in a modulator (5, 6) such that the phase differences (2.nu.+1).pi./2, (2.nu.+5).pi./2, and (2.nu.+3).pi./2 (where .nu. is an arbitrary integer) exist periodically between the two component beams emerging from the optical waveguide. The drive signals for the two modulators, which exhibit periodic frequency changes of 2F, are varied in such a way that the output of an optical-to-electrical transducer (2) to which the two component beams are directed after travelling around the optical waveguide provides a constant signal. To compensate for the Sagnac phase difference, an additional frequency difference of .DELTA.f is required between the two drive signals. The rotation rate .OMEGA. is determined by the equation ##EQU1## where .lambda.=vacuum wavelength of the light, and C=velocity of light in vacuo.
摘要翻译： 在旋转速率测量仪器中，由激光产生的光束衍生的两个分量光束在相反的方向围绕卷绕的光波导（半径R，长度L）循环。 由于Sagnac效应引起的两分量光束之间的相位差，确定旋转速度。 在进入光波导之前，将两个分量波束中的每一个调制在调制器（5,6）中，使得相位差（2nu +1）pi / 2，（2nu + 5）pi / 2和（2 nu +3）pi / 2（其中nu是任意整数）周期性地存在于从光波导出射的两个分量光束之间。 出现2F周期性频率变化的两个调制器的驱动信号以这样的方式变化，使得两个分量光束在光波导周围行进之后被引导的光电转换器（2）的输出 提供恒定的信号。 为了补偿Sagnac相位差，在两个驱动信号之间需要额外的DELTA f频率差。 旋转速率OMEGA由λ=真空波长λ=等式
确定，C =真空中的光速。 -
公开(公告)号：US5129019A
公开(公告)日：1992-07-07
申请号：US580921
申请日：1990-09-10
申请人： Rolf Robberg , Friedemann Mohr
发明人： Rolf Robberg , Friedemann Mohr
IPC分类号： G02B6/28
CPC分类号： G02B6/2843 , G02B6/2835
摘要： The method consists of first splicing (FIG. 2) one short length of a single-mode fiber (3, 4) into each of the optical fibers (1, 2) of fibers lying parallel to each other (FIG. 1), then fusing the two spliced-in single-mode fibers (3, 4) together (FIG. 3) and pulling them to form a coupler (6) (FIG. 4), and then embedding the coupler (6) in a protective housing (7) up to points beyond the splices (5).
摘要翻译： 该方法包括将一个短长度的单模光纤（3,4）首先接合到彼此平行的纤维（1,2）的每个光纤（1,2）中（图1），然后 将两个拼接单模光纤（3,4）熔合在一起（图3）并拉动它们以形成耦合器（6）（图4），然后将耦合器（6）嵌入保护壳体 7）高于接头（5）以上的点。
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公开(公告)号：US4768856A
公开(公告)日：1988-09-06
申请号：US7834
申请日：1987-01-27
申请人： Werner Hofmann , Friedemann Mohr , Leo Brautigam , Heinz Mieskes
发明人： Werner Hofmann , Friedemann Mohr , Leo Brautigam , Heinz Mieskes
CPC分类号： G02B6/4457 , Y10T29/49071 , Y10T29/49073
摘要： Optical-waveguide coils are used in rotation rate measuring instruments. To protect the optical-waveguide coil (1) from external influences, such as sound waves, pressure, and temperature changes, which may result in measurement errors, it is wound on a coil form (2) of soft elastomer under low tension. The coil unit so formed (1/2) is then placed in the annular groove (4) of a housing (3/5). Spacers at the coil form (2) position the coil unit (1/2) in the annular groove in such a way that the coil (1) is exactly in the middle of the annular groove (4). The remaining free space of the annular groove (4) is then filled with a sealing compound (6) in a vacuum. The sealing compound also spreads between the windings of the coil (1). It is preferably the same material as that from which the coil form (2) is made.
摘要翻译： 光波导线圈用于旋转速率测量仪器。 为了保护光波导线圈（1）免受诸如声波，压力和温度变化的外部影响，这可能导致测量误差，它在低张力下缠绕在软质弹性体的线圈形式（2）上。 然后将如此形成的线圈单元（1/2）放置在壳体（3/5）的环形槽（4）中。 线圈形式（2）的间隔件将线圈单元（1/2）定位在环形槽中，使得线圈（1）正好位于环形槽（4）的中间。 然后在真空中用密封化合物（6）填充环形槽（4）的剩余自由空间。 密封化合物也在线圈（1）的绕组之间扩展。 优选与制造线圈形式（2）的材料相同的材料。
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公开(公告)号：US4702599A
公开(公告)日：1987-10-27
申请号：US749062
申请日：1985-06-26
申请人： Friedemann Mohr
发明人： Friedemann Mohr
CPC分类号： G01C19/722
摘要： In the rotation rate measuring instrument, two light beams traverse a coiled optical fiber (1) in opposite directions. The two beams emerging from the optical fiber are combined, and the rotation rate is determined from the Sagnac phase difference between the two beams. The optical fiber (1), which may be embedded in a sealing compound (4), is contained in a double-walled housing (8, 9) having its two walls linked by heat bridges (10, 10'). The material of the housing is a good thermal conductor. The heat bridges between the two walls are located so that external heat will act on the coiled optical fiber (1) at predetermined points.
摘要翻译： 在旋转速率测量仪中，两个光束在相反的方向上横过线圈的光纤（1）。 从光纤出射的两个光束被组合，并且旋转速率由两个光束之间的Sagnac相位差确定。 可以嵌入密封化合物（4）中的光纤（1）被包含在其两壁通过热桥（10,10'）连接的双壁壳体（8,9）中。 外壳的材料是良好的导热体。 两个壁之间的热桥定位成使得外部热将在预定的点处作用在线圈化的光纤（1）上。
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公开(公告)号：US4856093A
公开(公告)日：1989-08-08
申请号：US67960
申请日：1987-06-29
申请人： Friedemann Mohr
发明人： Friedemann Mohr
CPC分类号： H04B10/61 , H04B10/6151 , H04B10/64
摘要： Optical heterodyne receivers for ASK-, PSK-, FSK-, and DPSK-modulated signals are disclosed which contain a polarization controller. The receiver contains a unit (Q, Q') which works on the difference-detector principle to eliminate the shot noise of the local oscillator (LO), which emits circularly polarized light. It further includes a quadrature demodulator (D, D', D") which, besides delivering the useful signal (N), provides polarization control signals (S.sub.E, S.sub.W) with which the ellipticity and the polarization angle of the received light (E.sub.S) are adjusted in such a way that the received light (E.sub.S) is linearly polarized at an angle of 45.degree. or 135.degree..
摘要翻译： 公开了包含偏振控制器的用于ASK-，PSK-，FSK-和DPSK调制信号的光外差接收器。 该接收器包含一个单元（Q，Q'），其工作在差分检测器原理上以消除发射圆偏振光的本地振荡器（LO）的散粒噪声。 它还包括正交解调器（D，D'，D“），除了传送有用信号（N）之外，还提供了偏振控制信号（SE，SW），其中接收光的椭圆率和偏振角 ）以接收光（ES）以45°或135°的角度线偏振的方式调节。
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公开(公告)号：US4850048A
公开(公告)日：1989-07-18
申请号：US94141
申请日：1987-09-08
申请人： Friedemann Mohr
发明人： Friedemann Mohr
CPC分类号： H04B10/61 , H04B10/6151 , H04B10/64
摘要： An optical receiver is disclosed in which a portion of the electric signal produced by optical-to-electric conversion is coupled out and fed to an automatic control system (4, 5, 8, 9, 12-17). The automatic control system contains polarization control elements (4, 5) which control the polarization of the received light beam relative to that produced by the local oscillator so that the electric output signal is maximized. There is no requirement for either light beam to be polarized in a particular direction in order to have optimum matching.
摘要翻译： 公开了一种光接收机，其中通过光 - 电转换产生的电信号的一部分被耦合出来并馈送到自动控制系统（4,5,8,9,12- 17）。 自动控制系统包含偏振控制元件（4,5），其控制接收光束相对于本地振荡器产生的偏振，使得电输出信号最大化。 不需要使光束在特定方向上被极化以便具有最佳匹配。
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公开(公告)号：US4573795A
公开(公告)日：1986-03-04
申请号：US417510
申请日：1982-09-13
CPC分类号： G01C19/722
摘要： In the measuring instrument, a light beam generated by a laser (1) is split into two component beams (L(CW), L(CCW)) which travel along a coiled optical waveguide (7) in opposite directions. After traversing the optical waveguide, the two component beams are superimposed on each other (5) and directed to an optical/electrical transducer (8). One of the two component beams (L(CW)) is frequency-modulated in a Bragg cell (6) before entering the optical waveguide (7), switchover being effected between two modulation frequencies (f1, f2) at a given frequency (F.sub.S). The modulation frequencies are chosen so that, after traversal of the optical waveguide (7), the phase differences (.phi..sub.B1, .phi..sub.B2) between the two component beams (if the rotation rate .OMEGA.=0) are .pi./2 and 3.pi./2 or even integral multiples thereof. In case of rotation, the phase difference (.phi..sub.S) caused by the Sagnac effect is superimposed on these phase differences. The output signal of the optical/electrcal transducer (8) is passed through a band-pass filter (10) whose midfrequency is equal to the frequency at which switching takes place between the two modulating signals. The amplitude of the band-pass output signal is directly proportional to the rotation rate (.OMEGA.). From this signal, a control signal can be derived which can be used to compensate for the phase difference (.phi..sub.S) caused by the Sagnac effect.
摘要翻译： 在测量仪器中，由激光器（1）产生的光束被分成沿相反方向沿着盘绕的光波导（7）行进的两个分量光束（L（CW），L（CCW））。 在横穿光波导之后，将两个分量光束彼此重叠（5）并被引导到光/电换能器（8）。 两个分量波束（L（CW））中的一个在进入光波导（7）之前在布拉格单元（6）中进行频率调制，在给定频率（FS）的两个调制频率（f1，f2）之间进行切换 ）。 选择调制频率使得在穿过光波导（7）之后，两个分量波束之间的相位差（phi B1，phi B2）（如果旋转速率OMEGA = 0）是π/ 2和3π/ 2或甚至其整数倍。 在旋转的情况下，由Sagnac效应引起的相位差（phi S）叠加在这些相位差上。 光/电传感器（8）的输出信号通过中频等于两个调制信号之间进行切换的频率的带通滤波器（10）。 带通输出信号的幅度与转速（OMEGA）成正比。 根据该信号，可以导出可用于补偿由Sagnac效应引起的相位差（phi S）的控制信号。
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