公开(公告)号：US4900917A

公开(公告)日：1990-02-13

申请号：US219684

申请日：1988-07-15

申请人： Melvyn Dixon ,  Nils A. Olsson ,  Robert E. Tench ,  Liang Tzeng

发明人： Melvyn Dixon ,  Nils A. Olsson ,  Robert E. Tench ,  Liang Tzeng

IPC分类号： G02B27/28 ,  G02F1/35 ,  G02F2/00 ,  H04B10/02 ,  H04B10/148 ,  H04B10/158 ,  H04B10/207 ,  H04B10/28

CPC分类号： H04B10/673 ,  H04B10/27 ,  H04B10/272 ,  H04B10/60 ,  H04B10/69

摘要： A polarization insensitive optical device is disclosed which is capable of providing direct optical amplification of an input signal of unknown (and possibly varying) polarization. A polarization diversity technique is utilized wherein a polarization beam splitter is used to divide the incoming signal into orthogonal components of known polarization (TE,TM). The orthogonal components are then separately amplified, using a semiconductor laser as the amplifying device. The amplified components are then recombined, either optically or electrically, to form the final output signal.

公开(公告)号：US4785454A

公开(公告)日：1988-11-15

申请号：US494275

申请日：1983-05-13

申请人： Nils A. Olsson ,  Won-Tien Tsang

发明人： Nils A. Olsson ,  Won-Tien Tsang

IPC分类号： H01S3/082 ,  H01S5/026 ,  H01S5/10 ,  H01S5/14 ,  H01S5/40 ,  H01S3/10

CPC分类号： H01S5/14 ,  H01S3/0826 ,  H01S5/1021 ,  H01S5/026 ,  H01S5/4025

摘要： A light transmitter comprising a cleaved-coupled cavity laser and stabilization means to maintain the laser in single longitudinal mode operation is described. '

摘要翻译： 描述了一种包括切割耦合的腔体激光器和将激光器维持在单一纵向模式操作中的稳定装置的光发射器。

公开(公告)号：US4632552A

公开(公告)日：1986-12-30

申请号：US708962

申请日：1985-03-06

申请人： Nils A. Olsson ,  Yan-Chi Shi

发明人： Nils A. Olsson ,  Yan-Chi Shi

IPC分类号： G01N21/45 ,  G01B9/02 ,  G01D5/26 ,  H01S5/0683 ,  H01S3/13

CPC分类号： H01S5/06832 ,  G01D5/266

摘要： A laser-driven interferometric signal sensing system has a cleaved-coupled cavity laser with separate stabilization servo loops of different time constants for the modulator and laser sections thereof. The laser section is biased above lasing threshold, and its stabilization loop is operated at a frequency twice the frequency of laser section bias current modulation. A laser loop feedback error signal is a function of predetermined, environmental-type, parameter variations in the sensing location and is processed to be a function of the second derivative of interferometer output intensity with respect to laser section current. That error signal is applied to modify laser section bias current in a direction to zero out the feedback signal.

摘要翻译： 激光驱动干涉信号感测系统具有切割耦合腔激光器，其具有用于其调制器和激光器部分的具有不同时间常数的单独的稳定伺服环路。 激光部分偏置在激光阈值以上，其稳定环路的工作频率是激光器部分偏置电流调制频率的两倍。 激光环路反馈误差信号是感测位置中预定的环境型参数变化的函数，并且被处理为相对于激光截面电流的干涉仪输出强度的二阶导数的函数。 该误差信号用于修改激光器部分偏置电流的方向以使反馈信号为零。

公开(公告)号：US4947134A

公开(公告)日：1990-08-07

申请号：US115143

申请日：1987-10-30

申请人： Nils A. Olsson

发明人： Nils A. Olsson

IPC分类号： H03K17/78 ,  H01S5/50 ,  H04B10/02 ,  H04B10/17 ,  H04B10/18 ,  H04Q3/52

CPC分类号： H04B10/2914 ,  H01S5/5027

摘要： A single frequency lightwave system employs semiconductor, optical amplifiers arranged in tandem with suitable nose filtering and isolation between amplifier stages. Feedback control maintains overlap between the signal frequency and one of the passbands of the amplifiers. Either direct detection or coherent detection can be used. Also described is a receiver front end which includes such an amplifier between the incoming signal and a photodetector. Both transmission systems and switching systems are described.

公开(公告)号：US4914667A

公开(公告)日：1990-04-03

申请号：US358468

申请日：1989-05-30

申请人： Greg E. Blonder ,  Charles H. Henry ,  Rudolf F. Kazarinov ,  Nils A. Olsson ,  Kenneth J. Orlowsky

发明人： Greg E. Blonder ,  Charles H. Henry ,  Rudolf F. Kazarinov ,  Nils A. Olsson ,  Kenneth J. Orlowsky

IPC分类号： G02B6/30 ,  G02B6/42 ,  H01S5/022 ,  H01S5/06 ,  H01S5/125

CPC分类号： H01S5/125 ,  G02B6/30 ,  G02B6/42 ,  G02B6/4204 ,  G02B6/4212 ,  G02B6/423 ,  H01S5/02252 ,  H01S5/0612 ,  H01S5/0654 ,  H01S5/141 ,  Y10S257/93

摘要： In the interest of ease of manufacture, hybrid lasers of distributed-Bragg-reflector type are preferred for use as light sources in optical communications. Such lasers are made to operate away from mode instabilities by adjusting a laser parameter such as, e.g., laser temperature, thereby assuring highly error-free transmission. Alternatively, by suitable design of the Bragg reflector it is possible to render mode instability of negligible influence on error rate.

摘要翻译： 为了易于制造，分布式布喇格反射器类型的混合激光器优选用作光通信中的光源。 通过调整诸如激光温度的激光参数，使这样的激光器远离模式不稳定性，从而确保高度无错误的传输。 或者，通过布拉格反射器的合适设计，可以使模式不稳定性对错误率的影响可以忽略不计。

公开(公告)号：US4852960A

公开(公告)日：1989-08-01

申请号：US249212

申请日：1988-09-23

申请人： Rodney C. Alferness ,  Charles H. Henry ,  Rudolf F. Kazarinov ,  Nils A. Olsson ,  Kenneth J. Orlowsky

发明人： Rodney C. Alferness ,  Charles H. Henry ,  Rudolf F. Kazarinov ,  Nils A. Olsson ,  Kenneth J. Orlowsky

IPC分类号： G02B6/28 ,  G02B6/34 ,  G02B6/42 ,  H01S5/02 ,  H01S5/026 ,  H01S5/10 ,  H01S5/125 ,  H01S5/14

CPC分类号： G02B6/12007 ,  G02B6/2821 ,  G02B6/42 ,  H01S5/0264 ,  G02B6/29334 ,  G02B6/29337 ,  G02B6/29356 ,  H01S5/021 ,  H01S5/1021 ,  H01S5/1032 ,  H01S5/125 ,  H01S5/142

摘要： Highly frequency-selective reflectivity is realized in an optical device including a waveguide and an evanescent-field coupled grating resonator cavity. The device may include a light source and serve as a low-chirp, narrow-linewidth communications laser for use, e.g., for transmission over a fiber having non-negligible dispersion and also in wavelength-multiplexed coherent systems.

摘要翻译： 在包括波导和消逝场耦合的光栅谐振腔的光学器件中实现了高频率选择性反射率。 该装置可以包括光源并且用作低啁啾，窄线宽通信激光器，用于例如用于在具有不可忽略的色散的光纤上以及在波长复用的相干系统中的传输。

公开(公告)号：US5229876A

公开(公告)日：1993-07-20

申请号：US499112

申请日：1990-03-26

申请人： M. T. Fatehi ,  Nils A. Olsson

发明人： M. T. Fatehi ,  Nils A. Olsson

IPC分类号： G01M11/00 ,  G02B6/00 ,  H04B10/00 ,  H04B10/02 ,  H04B10/08 ,  H04B10/17 ,  H04B17/00 ,  H04Q9/00

CPC分类号： H04B10/2931 ,  H04B10/0777 ,  H04B10/2912 ,  H04B2210/074 ,  H04B2210/078

摘要： In this invention telemetry information is transmitted in an optical fiber communication system by providing an amplifier pump with excess power beyond that necessary to pump the amplifier. The excess power is not used to pump the amplifier but is rather used to transmit the telemetry information. In a specific embodiment, an optical communication system including a doped optical fiber amplifier such as, for example, an erbium doped amplifier, is provided with an amplifier pump which operates at approximately 1.48 .mu.m. The amplifier pump is provided with excess power so as to transmit telemetry information. In a specific embodiment, the telemetry signal can be detected with a low cost photodetector at a subsequent station.

公开(公告)号：US4571576A

公开(公告)日：1986-02-18

申请号：US546991

申请日：1983-10-31

申请人： Nils A. Olsson ,  Chandra K. N. Patel

发明人： Nils A. Olsson ,  Chandra K. N. Patel

IPC分类号： G02F7/00 ,  H03M1/00

CPC分类号： G02F7/00 ,  H03M1/12

摘要： An analog-to-digital converter using a frequency tunable laser having output radiation of a frequency determined by the input voltage to the laser is described.

摘要翻译： 描述了使用具有由对激光器的输入电压确定的频率的输出辐射的频率可调激光器的模数转换器。

公开(公告)号：US4564946A

公开(公告)日：1986-01-14

申请号：US469800

申请日：1983-02-25

申请人： Nils A. Olsson ,  Won-Tien Tsang

发明人： Nils A. Olsson ,  Won-Tien Tsang

IPC分类号： H01S5/00 ,  H01S3/082 ,  H01S5/026 ,  H01S5/10 ,  H01S5/14 ,  H01S5/40 ,  H01S3/19

CPC分类号： H01S3/0826 ,  H01S5/1021 ,  H01S5/14 ,  H01S5/026 ,  H01S5/4025

摘要： Frequency shift keying optical communications devices using a cleaved coupled cavity laser are described. The cleaved coupled cavity laser comprises first and second laser diode sections which are mutually optically coupled to each other and means for adjusting the refractive index of the first and second sections relative to each other. The cleaved coupled cavity laser is part of a light source which further comprises means for selecting at least one desired output frequency from a group of at least two output frequencies.

摘要翻译： 描述了使用切割的耦合腔激光器的频移键控光通信设备。 切割的耦合腔激光器包括彼此相互光学耦合的第一和第二激光二极管部分，以及用于调节第一和第二部分相对于彼此的折射率的装置。 切割的耦合腔激光器是光源的一部分，其还包括用于从至少两个输出频率的组中选择至少一个期望的输出频率的装置。

公开(公告)号：US4979234A

公开(公告)日：1990-12-18

申请号：US288340

申请日：1988-12-20

申请人： Govind P. Agrawal ,  Nils A. Olsson

发明人： Govind P. Agrawal ,  Nils A. Olsson

IPC分类号： G02B6/00 ,  G02F1/35 ,  H01S5/50 ,  H04B10/00 ,  H04B10/17 ,  H04B10/18

CPC分类号： H04B10/2513 ,  H04B10/2914 ,  H01S5/5054 ,  H04B2210/256

摘要： The span of an optical dispersion-limited fiber for propagating optical pulses is improved by simultaneously chirping and amplifying the stream by means of a saturated semiconductor laser amplifier. The chirp causes a compression of the pulses as they propagate through an initial portion of the fiber, whereby the span of the fiber is increased.

摘要翻译： 通过饱和半导体激光放大器同时啁啾和放大流，提高了用于传播光脉冲的光学色散限制光纤的跨度。 当脉冲传播通过纤维的初始部分时，啁啾导致脉冲的压缩，由此纤维的跨度增加。