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1. 发明申请

WO1997018645A1 MULTI-TONE PHASE MODULATION FOR LIGHT WAVE COMMUNICATION SYSTEM 审中-公开
标题翻译：用于光波通信系统的多相位相位调制
公开(公告)号：WO1997018645A1
公开(公告)日：1997-05-22
申请号：PCT/US1996017775
申请日：1996-11-14
申请人： HARMONIC LIGHTWAVES, INC.
发明人： HARMONIC LIGHTWAVES, INC. , NILSSON, Alan, C. , KUO, Chien-Yu , KLEEFELD, Joseph , GALL, Charles, H. , RIDDLE, Alfred, Nicholson , CHOU, Harry
IPC分类号： H04B10/04
CPC分类号： H04B10/2537
摘要： An optical transmission system enables launching at least 17 dBm of optical power at 1550 nm wavelength into e.g. 50 km long span of standard telecommunication single-mode optical fiber (34), without incurring unacceptable penalties from stimulated Brillouin scattering, damage to optical phase modulators from excessive drive power or thermal effects, or signal degradations caused by the SBS suppression. High frequency modulation of the laser drive current is combined with lower frequency modulation of the phase of the laser output light that is itself varied over a range of approximately 25 MHz. This two-tone modulation raises the SBS threshold to greater than 17 dBm in the 1550 nm wavelength region when the laser has a line width less than 10 MHz, under cw operation. By thereby dividing the task of spectral partitioning between the laser (10) and the phase modulator (12), the RF input power level to the phase modulator is manageable and the laser operates in a regime that does not cause clipping.
摘要翻译：光传输系统使得能够在1550nm波长下发射至少17dBm的光功率。 50公里长的标准电信单模光纤（34），不会受到受激布里渊散射的不可接受的惩罚，由过大的驱动功率或热效应引起的光相位调制器的损坏或由SBS抑制引起的信号衰减。激光驱动电流的高频调制与激光输出光的相位的较低频率调制相结合，其本身在大约25MHz的范围内变化。这种双调制调制在1550nm波长区域中将SBS阈值提高到大于17dBm，当激光器的线宽小于10MHz时，在cw操作下。通过划分激光器（10）和相位调制器（12）之间的频谱划分任务，可以控制到相位调制器的RF输入功率电平，并且激光器在不引起限幅的状态下工作。

2. 发明申请

WO1995015613A1 PREDISTORTER FOR HIGH FREQUENCY OPTICAL COMMUNICATIONS DEVICES 审中-公开
标题翻译：高频光通信设备的预置器
公开(公告)号：WO1995015613A1
公开(公告)日：1995-06-08
申请号：PCT/US1994013275
申请日：1994-11-29
申请人： HARMONIC LIGHTWAVES, INC.
发明人： HARMONIC LIGHTWAVES, INC. , NAZARATHY, Moshe , GALL, Charles, H. , KUO, Chien-Yu
IPC分类号： H03F01/32
CPC分类号： H03F1/3258 , H03F1/3252 , H03F1/3276 , H04B10/25133
摘要： A generalized frequency dependent predistortion circuit for nonlinear optic devices includes a pre-filter and post-filter associated with a linearizer (distorter). A multi-channel sub-carrier electrical signal is input to a splitter (72) which provides on a primary path (50) a signal to a time delay and hence to a coupler to the secondary paths. In the first secondary path (52), a pre-filter (56) provides a signal to a second order distorter (58). This signal is then subject to a post-filter (60) and then to a variable attenuator (68). In the second secondary path, a third order distorter (54) again has an associated pre-filter (62) and post-filter (66) with a variable attenuator (70) downstream of the post-filter. The variable attenuators in each path provide frequency independent attenuation. In one version the distorters in both paths are nonlinear diode circuits. The second secondary path provides very low fundamental leak-through.
摘要翻译：用于非线性光学器件的广义频率相关预失真电路包括与线性化器（变阻器）相关联的预滤波器和后置滤波器。多通道副载波电信号输入到分路器（72），分路器（72）在主路径（50）上提供信号到时间延迟，从而提供到次级路径的耦合器。在第一次要路径（52）中，预滤波器（56）向第二阶变压器（58）提供信号。然后该信号经过后置滤波器（60），然后经受可变衰减器（68）。在第二辅助路径中，三阶变形器（54）再次具有与后置滤波器下游的可变衰减器（70）相关联的预滤波器（62）和后置滤波器（66）。每个路径中的可变衰减器提供频率无关的衰减。在一个版本中，两个路径中的变换器都是非线性二极管电路。第二次路径提供极低的基本渗漏。

3. 发明申请

WO1991012501A1 LIGHT WAVE POLARIZATION DETERMINATION USING A HYBRID SYSTEM 审中-公开
标题翻译：使用混合系统的光波偏振测定
公开(公告)号：WO1991012501A1
公开(公告)日：1991-08-22
申请号：PCT/US1991000596
申请日：1991-01-28
申请人： HARMONIC LIGHTWAVES, INC.
发明人： HARMONIC LIGHTWAVES, INC. , BERGER, Josef , KAGAN, Yishai , MICK, Doron , NAZARATHY, Moshe
IPC分类号： G01J04/04
CPC分类号： G01J4/04 , G01N21/211
摘要： Apparatus and method for determining dynamically the polarization vector direction, or polarization vector components and associated temporal phase angle, of a light beam. The apparatus includes a compact polarization beam splitter (19) that receives a beam of light (17), separates the beam into two perpendicular polarization components (21, 23) and directs these components to a pair of optical detectors (25, 27) and associated circuits (29) that form the sum and difference signals of the electrical signals produced by the optical detectors. This produces a projection of the polarization vector on a given direction. If the light is generally elliptically polarized, use of two such polarization beam splitters (49, 59) and four optical detector (55, 57, 65, 67) allows reconstruction of the polarization ellipse for the light beam. Alternatively, use of one such polarization beam splitter (219), two optical detectors (225, 227) and a rotating wave plate (231) in a multiplexed configuration (233) allows reconstruction of the polarization ellipse. The polarization detector is very compact and may be housed in a container that is no more than a few cm. in diameter.

4. 发明申请

WO1994006042A1 CASCADED OPTICAL MODULATION SYSTEM WITH HIGH LINEARITY 审中-公开
标题翻译：具有高线性度的嵌入式光学调制系统
公开(公告)号：WO1994006042A1
公开(公告)日：1994-03-17
申请号：PCT/US1993008117
申请日：1993-08-27
申请人： HARMONIC LIGHTWAVES, INC.
发明人： HARMONIC LIGHTWAVES, INC. , NAZARATHY, Moshe , KAGAN, Yishai , SIMLER, Yaron
IPC分类号： G02B06/12
CPC分类号： G02F1/225 , G02F1/3136 , G02F2201/16 , G02F2203/19
摘要： An optical modulation system having cascade-coupled electro-optic modulator stages in either dual tandem (figs. 9 and 15) or split tandem (figs. 12 and 13) configurations. An electrical splitter (80) derives multiple electrical drives (79, 99) for the multiple stages (61, 63) from a single modulating input signal (129). The multiple drive signals are linearly related in magnitude and preferably induce simultaneous antiphase (180 out-of-phase) optical modulation in the tandem stages. While a double Mach-Zehnder cascade configuration could be used, at least one modulator stage might instead be a balanced-bridge interferometer-type (BBI) modulator having at least one directional coupler (95, 115). At least one directional coupler in such a configuration may be a (Delta) (beta) coupler. Application of bias voltages to the interferometer sections (77, 97) and to coupler sections (95, 115) by means of a parametric feedback loop (121-137) is done in order to simultaneously enhance the linear modulation coefficient, minimize odd order distortions and null the even order distortions that are associated with biased (Delta) (beta) couplers.
摘要翻译：具有双串联（图9和15）或分离串联（图12和13）配置的级联耦合电光调制器级的光调制系统。电分配器（80）从单个调制输入信号（129）导出多级（61,63）的多个电驱动器（79,99）。多个驱动信号在幅度上线性相关，并且优选地在串联级中引起同步反相（180°异相）光调制。尽管可以使用双马赫 - 曾德级联配置，但是至少一个调制器级可以替代地是具有至少一个定向耦合器（95,115）的平衡桥式干涉仪型（BBI）调制器。在这种配置中的至少一个定向耦合器可以是（Delta）（β）耦合器。通过参数反馈回路（121-137）将偏置电压施加到干涉仪部分（77,97）和耦合器部分（95,115），以便同时增强线性调制系数，使奇数阶失真最小化并且使与偏置（Delta）（beta）耦合器相关联的偶数阶失真为零。

5. 发明申请

WO1993010603A1 SHUNT-EXPANSIVE PREDISTORTION LINEARIZERS FOR OPTICAL ANALOG TRANSMITTERS 审中-公开
标题翻译：用于光模拟发射机的分布式预测线性化器
公开(公告)号：WO1993010603A1
公开(公告)日：1993-05-27
申请号：PCT/US1992010029
申请日：1992-11-18
申请人： HARMONIC LIGHTWAVES, INC.
发明人： HARMONIC LIGHTWAVES, INC. , NAZARATHY, Moshe , LEY, Anthony, J. , VERHOEVEN, Hans
IPC分类号： H04B10/00
CPC分类号： H04B10/58 , H04B10/505
摘要： This invention teaches new types of linearization circuits, exhibiting improved broadband suppression of nonlinear distortion. These realizations do not require the use of reactive elements such as capacitors, or of active elements such as transistors, eliminating the drawbacks of prior art realizations. The linearization circuits are particularly suitable for linearizing optical sources with odd wave voltage to light transfer characteristics, such as externally modulated CW lasers (Fig. 16, 18 and 19). The fundamental building blocks of the linearization circuits of this invention are novel nonlinear electrical one-ports (Fig. 3a) with an expansive V-I characteristic, denoted as ENLOP (Fig. 7) (Expansive Nonlinear one-Ports). The ENLOP building blocks are further embedded in linear circuits (Fig. 10).

6. 发明申请

WO1993010582A1 TEMPERATURE STABLE SOLID-STATE LASER PACKAGE 审中-公开
标题翻译：温度稳定的固态激光封装
公开(公告)号：WO1993010582A1
公开(公告)日：1993-05-27
申请号：PCT/US1992009071
申请日：1992-10-23
申请人： HARMONIC LIGHTWAVES, INC.
发明人： HARMONIC LIGHTWAVES, INC. , BERGER, Josef , MICK, Doron , KLEEFELD, Joseph
IPC分类号： H01S03/04
CPC分类号： H01S3/042 , G02B6/4213 , G02B6/4257 , G02B6/4269 , G02B6/4271 , H01S3/025 , H01S3/0405 , H01S3/09415 , H01S3/1028 , H01S3/1317
摘要： A solid-state laser package includes a heat sink (15), a thermo-electric cooler (13) mounted on the heat sink, a base (11, 17) mounted on the cooler, and optical elements mounted on the base. The active medium (25) and lenses (39, 41) are mounted in a surface v-groove (21) formed in the base. A laser diode (31) is mounted to the base so that its laser emission is aligned with the groove. One cavity mirror is a coating (27) on one end of the active medium, transparent to the diode pump light and reflective of the active medium generated laser light, while a second cavity mirror is a mirror (29) mounted on the base. The optical system is aligned at a temperature at which the diode emission matches an absorption band of the active medium. A thermistor (43) on the base measures the temperature and a processor (65) adjusts the current applied to the thermo-electric cooler to maintain the base temperature even in extreme environments.

7. 发明申请

WO1993010474A1 ACTIVE ALIGNMENT SYSTEM FOR LASER TO FIBER COUPLING 审中-公开
标题翻译：用于光纤耦合的激光对准系统
公开(公告)号：WO1993010474A1
公开(公告)日：1993-05-27
申请号：PCT/US1992008866
申请日：1992-10-16
申请人： HARMONIC LIGHTWAVES, INC.
发明人： HARMONIC LIGHTWAVES, INC. , BERGER, Josef , KAGAN, Yishai , MICK, Doron , NAZARATHY, Moshe
IPC分类号： G02B06/26
CPC分类号： G02B6/4227 , G02B6/4212 , G02B6/4226
摘要： A laser (11) generates a beam (10) which is actively steered into an optical element (20) having a waveguide. The waveguide is coupled to an optical fiber (43, 44) which is also actively steered. Both steering mechanisms seek to align the beam from the laser to the fiber for maximum output. The beam steering mechanism features two planar mirrors (13, 17) pivoted 90 DEG to each other. Transducers (14, 16) cause desired amounts of pivoting to adjust the beam. The fiber steering mechanism (23, 24) features flexures (52, 54) arranged with bending moments at right angles. Electrical signals (25, 64, 74) control the extent of bending in each flexure. The light intensity in the fiber is sensed (37-39) downstream from both steering mechanisms and compared to an expected amount (15). The resulting error signal (27) is used as feedback in a servo loop to adjust the two steering mechanisms in order to maximize light output.
摘要翻译：激光器（11）产生主动转向具有波导的光学元件（20）的光束（10）。波导耦合到也被主动转向的光纤（43,44）。两个转向机构都设法使来自激光器的光束与光纤对准以获得最大的输出。光束转向机构具有两个彼此枢转90°的平面镜（13,17）。传感器（14,16）导致所需量的旋转来调整光束。纤维转向机构（23,24）具有以直角设置弯曲力矩的弯曲部（52,54）。电信号（25,64,74）控制每个弯曲中的弯曲程度。从两个转向机构的下游感测纤维中的光强度（37-39），并将其与预期量进行比较（15）。所得到的误差信号（27）用作伺服回路中的反馈以调整两个转向机构，以使光输出最大化。

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