公开(公告)号：US5307195A

公开(公告)日：1994-04-26

申请号：US892621

申请日：1992-06-01

Applicant: Pierre Nicole

Inventor： Pierre Nicole

IPC: H04B10/00 ,  H04B10/22 ,  H04B10/26 ,  H04B10/06

CPC classification number: H04B10/2587

Abstract: In a method of transmitting an electromagnetic signal in an optical fiber a polarized optical base signal is generated and input at a first and of an optical fiber, an optical signal emerging from the fiber after the base signal has passed through it is recovered at a second end of the fiber; this emergent signal is processed by electro-optical modulation with the electromagnetic signal which is to be transmitted and polarization conversion is effected, and the optical signal modified in this way is reinput to the said second end of the fiber; an optical return signal emerging from the fiber after the modified optical signal has passed through it is recovered at the first end of the optical fiber and this is analyzed in order to determine the characteristics of the electromagnetic signal.

Abstract translation: 在光纤中发送电磁信号的方法中，在第一和第一光纤上产生并输入偏振光基信号，在基信号通过之后从光纤出射的光信号在第二 纤维端; 这种紧急信号通过电光调制被处理，电磁信号将被传输并进行极化转换，并且以这种方式修改的光信号被重新输入到光纤的所述第二端; 在修改的光信号已经通过之后从光纤出来的光返回信号在光纤的第一端被恢复，并且这被分析以确定电磁信号的特性。

公开(公告)号：US5282072A

公开(公告)日：1994-01-25

申请号：US794864

申请日：1991-11-19

Applicant: Moshe Nazarathy ,  Anthony J. Ley ,  Hans C. Verhoeven

Inventor： Moshe Nazarathy ,  Anthony J. Ley ,  Hans C. Verhoeven

IPC: H01S3/10 ,  H03F1/32 ,  H04B10/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/155 ,  H04B10/18 ,  H04B10/26 ,  H04B10/28 ,  H04B10/00

CPC classification number: H04B10/58 ,  H04B10/505

Abstract: 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. The fundamental building blocks of the linearization circuits of this invention are novel nonlinear electrical one-ports with an expansive V-I characteristic, denoted as ENLOP (Expansive Nonlinear one-Ports). The ENLOP building blocks are further embedded in linear circuits.

Abstract translation: 本发明教导了新型线性化电路，表现出改进的非线性失真的宽带抑制。 这些实现不需要使用诸如电容器的无功元件或诸如晶体管的有源元件，消除了现有技术实现的缺点。 线性化电路特别适用于将具有奇数波电压的光源线性化为光传输特性，例如外部调制的CW激光器。 本发明的线性化电路的基本构造块是具有广泛V-I特征的新型非线性电单端口，表示为ENLOP（扩展非线性单端口）。 ENLOP构建块进一步嵌入在线性电路中。

公开(公告)号：US5262885A

公开(公告)日：1993-11-16

申请号：US510069

申请日：1990-04-17

Applicant: Michel Steers ,  Jean-Pierre Hazan ,  Giles Delmas ,  Michel Courdille ,  Gerrit E. Zaaijer

Inventor： Michel Steers ,  Jean-Pierre Hazan ,  Giles Delmas ,  Michel Courdille ,  Gerrit E. Zaaijer

IPC: G01V8/10 ,  G01V3/00 ,  G01V15/00 ,  G08B13/22 ,  H03K17/16 ,  H03K17/78 ,  H03K17/79 ,  H03K17/94 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28 ,  H04B10/00

CPC classification number: H03K17/941 ,  H03K17/79

Abstract: A control circuit comprising a thyristor and a feedback circuit formed by an inductance and a generator for producing electrical energy in response to a luminous event. The feedback circuit controls the conducting or cut-off state of the thyristor by the fact that a trigger-gate of the thyristor is connected to a terminal of the generator having a polarity cutting off the thyristor when the generator is illuminated. The thyristor is switched on in response to an energy stored in the inductance, which energy is caused by a sudden discontinuity of the luminous event.

Abstract translation: 一种控制电路，包括晶闸管和由电感和发生器形成的反馈电路，用于响应于发光事件产生电能。 反馈电路通过以下事实来控制晶闸管的导通或截止状态：当发电机被点亮时，晶闸管的触发栅极连接到具有极性的发生器的端子，从而切断晶闸管。 响应于存储在电感中的能量，晶闸管被接通，该能量由发光事件的突然不连续性引起。

公开(公告)号：US5221839A

公开(公告)日：1993-06-22

申请号：US656884

申请日：1991-02-15

Applicant: David M. Braun

Inventor： David M. Braun

IPC: G02B6/32 ,  G02B3/00 ,  G02B6/38 ,  G02B6/42 ,  G02B13/00 ,  H01L31/0232 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28

CPC classification number: G02B3/0087 ,  G02B13/0095 ,  G02B6/4207 ,  G02B6/327 ,  G02B6/3822

Abstract: A gradient-index (GRIN) rod lens for use in an optical receiver, in which the end face of the GRIN rod lens opposite a photodetector is bevelled. The resulting optical receiver achieves an optical return loss which is >10 dB higher than known optical receivers having a bevelled end solely on an optical launch side of the GRIN rod lens.

Abstract translation: 用于光接收机的梯度折射率（GRIN）棒状透镜，其中与光电检测器相对的GRIN棒透镜的端面被倾斜。 所得到的光接收机实现了光学返回损耗，其高于仅具有在GRIN棒透镜的光发射侧的倾斜端的已知光接收机的10dB。

公开(公告)号：US5194979A

公开(公告)日：1993-03-16

申请号：US712213

申请日：1991-06-07

Applicant: Kwang-Tsai Koai ,  Robert Olshansky

Inventor： Kwang-Tsai Koai ,  Robert Olshansky

IPC: G01J1/44 ,  H01S3/10 ,  H01S5/00 ,  H01S5/026 ,  H01S5/042 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/158 ,  H04B10/17 ,  H04B10/26 ,  H04B10/28

CPC classification number: H04B10/2914 ,  H04B10/6911

Abstract: A semiconductor optical amplifier is utilized for optical amplification and for detection of an optical signal at the current injection electrode of the optical amplifier. A wide detection bandwidth is provided by utilizing an impedance transformer between the current injection terminal and the detection circuit. The impedance transformer typically has an input impedance of about 1 to 15 ohms. The impedance transformer can be a bipolar junction transistor circuit, a microstrip transmission line impedance transformer or a hybrid impedance transformer. A wide detection bandwidth is also obtained by providing a semiconductor optical amplifier having two current injection electrodes. A bias current is supplied through both current injection electrodes, and both electrodes produce optical gain. However, only one of the electrodes is used for optical signal detection. The detection electrode has a relatively high junction resistance and a relatively high series resistance.

公开(公告)号：US5191586A

公开(公告)日：1993-03-02

申请号：US732097

申请日：1991-07-18

Applicant: David R. Huber

Inventor： David R. Huber

IPC: H01L33/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/08 ,  H01S3/094 ,  H01S3/10 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/155 ,  H04B10/17 ,  H04B10/26 ,  H04B10/28

CPC classification number: H04B10/2912 ,  H01S3/0675 ,  H01S3/06795 ,  H04B10/291 ,  H04B10/506 ,  H01S3/08086 ,  H01S3/094023 ,  H04B2210/003

Abstract: A narrow bandwidth incoherent optical source is provided. A superluminescent source includes a gain medium having an input end and an output end. The input end of the gain medium is optically coupled to a reflector to cause spontaneous emissions within a predetermined band exiting the input of the gain medium to be reflected back into the medium. Spontaneous emissions outside of the predetermined band are lost. The gain medium can comprise a doped fiber, such as an Erbium doped fiber. An optical isolator prevents the superluminescent source from lasing. By providing a plurality of reflectors operating in different bands, the superluminescent source can generate a plurality of optical carriers.

公开(公告)号：US5111324A

公开(公告)日：1992-05-05

申请号：US535744

申请日：1990-06-08

Applicant: Fazlollah R. Jahromi

Inventor： Fazlollah R. Jahromi

IPC: H04B10/04 ,  H03F3/08 ,  H04B1/06 ,  H04B10/06 ,  H04B10/14 ,  H04B10/158 ,  H04B10/26 ,  H04B10/28

CPC classification number: H03F3/087 ,  H04B10/6911

Abstract: An optical receiver incorporating a voltage dependant impedance arranged to shunt excess AC photodetector signal away from the receiver amplifier in response to light level.

公开(公告)号：US5031234A

公开(公告)日：1991-07-09

申请号：US359801

申请日：1989-05-31

Applicant: Lori E. Primas ,  Richard L. Sydnor ,  George F. Lutes

Inventor： Lori E. Primas ,  Richard L. Sydnor ,  George F. Lutes

IPC: H04B10/26

CPC classification number: H04B10/2587

Abstract: A reference frequency distribution system for transmitting a reference frequency from a reference unit to a remote unit while keeping the reference frequency at the reference unit and remote unit in phase. A fiber optic cable connects the reference unit to the remote unit. A frequency source at the reference unit produces a reference frequency having an adjustable phase. A fiber optic transmitter at the reference unit modulates a light beam with the reference frequency and transmits the light beam into the fiber optic cable. A 50/50 reflector at the remote unit reflects a first portion of the light beam from the reference unit back into the fiber optic cable to the reference unit. A first fiber optic receiver disposed at the remote unit receives a second portion of the light beam and demodulates the reference frequency therefrom to be used at the remote unit. A second fiber optic receiver disposed at the reference unit receives the first portion of the light beam and demodulates a reference frequency component therefrom. A phase conjugator is connected to the frequency source for comparing the phase of the reference frequency component to the phase of the reference frequency modulating the light beam being transmitted from the reference unit and for continuously adjusting the phase of the reference frequency modulating the light beam being transmitted from the reference unit to maintain a conjugate (anti-symmetric) relationship between the reference frequency component and the reference frequency modulating the light beam whereby virtually no phase difference exists between the phase of the reference frequency component and the phase of the reference frequency modulating the light beam.

Abstract translation: 一种参考频率分配系统，用于将参考频率从参考单元发送到远程单元，同时将参考频率保持在参考单元和远程单元的同相。 光纤电缆将参考单元连接到远程单元。 在参考单元处的频率源产生具有可调相位的参考频率。 在参考单元处的光纤发射器调制具有参考频率的光束并将光束传输到光纤电缆中。 遥控单元上的50/50反射器将来自参考单元的光束的第一部分反射回到光纤电缆到参考单元。 设置在远程单元处的第一光纤接收器接收光束的第二部分并且解调其参考频率以在远程单元处使用。 设置在参考单元处的第二光纤接收器接收光束的第一部分并从其解调参考频率分量。 相位共轭器连接到频率源，用于将参考频率分量的相位与调制从参考单元发射的光束的参考频率的相位进行比较，并且用于连续调节调制光束的参考频率的相位为 从参考单元发送以保持参考频率分量和调制光束的参考频率之间的共轭（反对称）关系，从而在参考频率分量的相位和参考频率调制的相位之间几乎不存在相位差 光束。

公开(公告)号：US5029240A

公开(公告)日：1991-07-02

申请号：US371567

申请日：1989-06-26

Applicant: Michael de La Chapelle ,  Hui-Pin Hsu

Inventor： Michael de La Chapelle ,  Hui-Pin Hsu

IPC: H01L31/10 ,  H01L31/108 ,  H03J3/18 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/158 ,  H04B10/26 ,  H04B10/28 ,  H04J14/02 ,  H04J99/00

CPC classification number: H01L31/108 ,  H04B10/6932 ,  H04B10/6973 ,  H04J14/02

Abstract: The optical receiver has a photodiode (10) which is reverse biased by a voltage supply (14). The voltage supply provides a variable bias voltage determined by a control unit (16) and the photodiode is matched to the load (22) by an impedance matching circuit (12). The photodiode exhibits large capacitance changes over a range of bias voltages and may be implemented using a Schottky barrier or P.sup.+ N photodiode. By changing the bias voltage, the photodiode capacitance changes to vary the tuned frequency of the receiver. The matching circuit cancels the reactive component of the photodiode impedance and matches the resistive component to the load. The photodiode may have a doping profile in which an intrinsic or lightly doped region of width greater than the average photon penetration depth is located next to the junction. After the intrinsic region, the doping profile may be selected to achieve linear tuning. This doping profile gives linear tuning without sacrificing photodiode conversion efficiency.

Abstract translation: 光接收器具有由电压源（14）反向偏置的光电二极管（10）。 电压源提供由控制单元（16）确定的可变偏置电压，并且光电二极管通过阻抗匹配电路（12）与负载（22）匹配。 光电二极管在偏置电压范围内显示出大的电容变化，并且可以使用肖特基势垒或P + N光电二极管来实现。 通过改变偏置电压，光电二极管电容变化以改变接收机的调谐频率。 匹配电路消除光电二极管阻抗的无功分量，并将电阻分量与负载相匹配。 光电二极管可以具有掺杂分布，其中宽度大于平均光子穿透深度的本征或轻掺杂区域位于接合点旁边。 在本征区域之后，可以选择掺杂分布以实现线性调谐。 该掺杂曲线提供线性调谐，而不牺牲光电二极管的转换效率。

公开(公告)号：US5025456A

公开(公告)日：1991-06-18

申请号：US305035

申请日：1989-02-02

Applicant: Yusuke Ota ,  Robert G. Swartz

Inventor： Yusuke Ota ,  Robert G. Swartz

IPC: H03K5/08 ,  H04B10/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/158 ,  H04B10/26 ,  H04B10/28 ,  H04L25/03

CPC classification number: H04B10/6933

Abstract: A burst mode digital data receiver automatically adjusts its logic reference voltage to be equal to one-half of the sum of the minimum and maximum excursions of a received data signal. The receiver includes a differential amplifier circuit which has a first input for receiving the data signal and a second input connected to a voltage reference circuit. The voltage reference circuit is responsive to an output signal from the amplifier circuit to produce the required logic reference voltage at the second input to the amplifier circuit by generating a feedback signal which causes the amplifier circuit to have a first gain value during the absence of the data signal and while the data signal is less than its peak amplitude and a second gain value approximately twice the first gain value for a predetermined time after the peak amplitude of the data signal is reached.