公开(公告)号：US5138483A

公开(公告)日：1992-08-11

申请号：US824742

申请日：1992-01-21

申请人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

发明人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/07 ,  H01S3/0915 ,  H01S3/094 ,  H01S3/10 ,  H01S3/17 ,  H01S3/30 ,  H04B10/12

CPC分类号： H01S3/094003 ,  G05B2219/50372 ,  G05B2219/50373

摘要： An optical, low-noise amplifier of the active-fiber type, which fiber contains a laser light emitting substance, adapted to be connected to an optical telecommunication fiber and receiving light therefrom at the transmission wavelength. The active fiber is also fed from a light source at a pumping wavelength and has a length corresponding to a partial absorption of the pumping light. Downstream of active fiber, there is a selective mirror device which reflects the light at the pumping wavelength and is transparent to the transmission wavelength light. Preferably, the mirror device consists of an optical demultiplexer adapted to separate the transmission wavelength and the pumping wavelength on two output fibers. A mirror which reflects the pumping wavelength is present at the end of the fiber carrying the pumping wavelength.

摘要翻译： 一种有源光纤类型的光学低噪声放大器，该光纤包含激光发射物质，其适于连接到光通信光纤并以透射波长从其接收光。 有源光纤也从泵浦波长的光源进给，其长度对应于泵浦光的部分吸收。 在有源光纤的下游，有一个选择性反射镜装置，它反射了在激发波长的光，并对透射波长的光是透明的。 优选地，镜装置由适于在两个输出光纤上分离透射波长和激发波长的光解复用器组成。 反射泵浦波长的反射镜存在于带有泵浦波长的光纤的端部。

公开(公告)号：US5119229A

公开(公告)日：1992-06-02

申请号：US602364

申请日：1990-10-22

申请人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

发明人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

IPC分类号： G02F1/35 ,  G02B6/28 ,  G02B6/34 ,  G02F1/39 ,  H01S3/06 ,  H01S3/07 ,  H01S3/0915 ,  H01S3/094 ,  H01S3/17 ,  H01S3/30 ,  H04B10/04 ,  H04B10/06 ,  H04B10/12 ,  H04B10/142 ,  H04B10/152

CPC分类号： H01S3/094003 ,  G02B6/2821

摘要： An optical amplifier (3) in accordance with the invention consists of the assembly of a length of active-core optical fiber (8), single-mode to both pumping and signal optical radiations, and a dichroic coupler (6) which includes two optical fiber lengths (9, 10), both single-mode to pumping and signal optical radiations, coupled to each other over one portion (11) by fusion of the respective claddings and substantial setting in common of the respective cores in the fused portion (11).

公开(公告)号：US5245467A

公开(公告)日：1993-09-14

申请号：US891680

申请日：1992-05-28

申请人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

发明人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/16 ,  H01S3/17

CPC分类号： H01S3/06708 ,  H01S3/06754 ,  H01S3/17 ,  H01S2301/04 ,  H01S3/094011 ,  H01S3/1693 ,  H01S3/1698

摘要： An optical fiber and an optical amplifier, in particular for optical fiber telecommunication lines operating with a transmission signal in a predetermined wavelength range. The amplifier comprises laser emitting active optical fiber doped with erbium and a further doping substance, distributed along the fiber. The further doping substance has an absorption for a light having a wavelength lower than 1,540 nm substantially higher than the absorption that the further doping substance shows for a light having a wavelength varying from 1,540 nm to the upper limit of the predetermined wavelength range of the transmission signal. Preferably, the further doping substance is samarium. Samarium contained in the fiber is capable of absorbing the spontaneous erbium emission, which would constitute a noise source, thereby allowing a communication signal to be amplified in a wavelength range corresponding substantially to the tolerance range of the commercially available laser light emitters used as the communication signal source.

摘要翻译： 光纤和光放大器，特别是用于以预定波长范围的传输信号工作的光纤通信线路。 放大器包括掺杂有铒的激光发射有源光纤和沿着光纤分布的另外的掺杂物质。 进一步的掺杂物质对于波长低于1540nm的光的吸收，其显着高于进一步的掺杂物质对于具有从1540nm变化到传输的预定波长范围的上限的光的显示的吸收， 信号。 优选地，另外的掺杂物质是钐。 包含在纤维中的钐能够吸收构成噪声源的自发铒发射，从而允许通信信号在基本上对应于用作通信的市售激光发射器的公差范围内的波长范围内被放大 信号源。

公开(公告)号：US5054876A

公开(公告)日：1991-10-08

申请号：US555941

申请日：1990-07-20

申请人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

发明人： Giorgio Grasso ,  Aldo Righetti ,  Flavio Fontana

IPC分类号： G02B6/44 ,  G02B6/00 ,  G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/094 ,  H01S3/10 ,  H04B3/46 ,  H04B10/00 ,  H04B17/02

CPC分类号： H04B10/2931 ,  H04B10/032 ,  H04B10/0775 ,  H04B10/0777 ,  H04B10/291 ,  H04B10/2912 ,  H01S3/06754 ,  H01S3/09408 ,  H04B2210/071 ,  H04B2210/074 ,  H04B2210/075

摘要： An optical fiber telecommunication line composed of a number of series connected optical cables arranged end-to-end includes an active core optical fiber amplifier for the transmitted signals between each adjacent pair of optical cables. Two pumping optical radiation sources are connected to each active core optical fiber within each of the amplifiers, one source for each end of a single active core optical fiber. One of these two sources is placed into service and the second one is kept in reserve to be placed into service if the first one fails. A microprocessing circuit causes the sources to send distinctive recognizable alarm signals indicative of the state of an associated amplifier to terminal stations at the ends of the line and to receive therefrom control signals to control and exchange the functions between the two sources as necessary.

公开(公告)号：US5497265A

公开(公告)日：1996-03-05

申请号：US162651

申请日：1993-12-06

申请人： Flavio Fontana ,  Aldo Righetti ,  Giorgio Grasso

发明人： Flavio Fontana ,  Aldo Righetti ,  Giorgio Grasso

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H04B10/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28 ,  H04B10/00

CPC分类号： H01S3/067 ,  H01S3/06754 ,  H01S3/094003

摘要： An optical signal generator for telecommunication systems, comprising at least a single-frequency active optical fiber laser as an optical signal source at a signal transmission wavelength, at least an active optical fiber optical amplifier operatively connected to said laser and at least one source of pumping optical power at a pumping wavelength, the pumping optical power source being operatively connected to at least one of said active fibers of said laser and amplifier and transfer-means for said pumping optical power being connected to said active fibers of said laser and amplifier, in order to transfer unabsorbed optical power at the pumping wavelength from one of said active fibers to the other of said active fibers.

摘要翻译： 一种用于电信系统的光信号发生器，包括至少一个单频有源光纤激光器作为信号传输波长的光信号源，至少一个可操作地连接到所述激光器的有源光纤光放大器和至少一个泵浦源 泵浦光功率可操作地连接到所述激光器和放大器的所述有源光纤中的至少一个，并且用于所述泵浦光功率的转移装置被连接到所述激光器和放大器的所述有源光纤， 以将泵浦波长的未吸收光功率从所述活性纤维之一转移到所述活性纤维中的另一个。

公开(公告)号：US5381426A

公开(公告)日：1995-01-10

申请号：US180878

申请日：1994-01-12

申请人： Flavio Fontana ,  Sergio Bosso

发明人： Flavio Fontana ,  Sergio Bosso

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/067 ,  H01S3/083 ,  H01S3/098 ,  H01S3/10 ,  H01S3/106

CPC分类号： H01S3/06791 ,  H01S3/08027 ,  H01S3/1068 ,  H01S3/107 ,  H01S3/1109

摘要： An active mode-locking pulse laser generator comprising:an active fibre doped with a fluorescent dopant;active-fibre pumping means;a modulator to be driven from the outside, connected in series to said active fibre;a wavelength selecting filter, to be driven from the outside, connected in series to said active fibre;means for drawing an emission signal from said active fibre;means for defining a laser cavity including the active fibre, pumping means, modulator, filter, and signal drawing means,wherein the drivable modulator is adapted to generate a modulation of the emission signal generated by the active fibre, such as to cause a mode-locking of the oscillating emission signal in the cavity, wherein the wavelength selecting filter consists of an optical-waveguide monolithic filter, in the absence of components subjected to spatial-configuration modifications.

摘要翻译： 一种主动锁模脉冲激光发生器，包括：掺杂有荧光掺杂剂的有源光纤; 主动纤维泵送装置; 从外部驱动的调制器，与所述有源光纤串联连接; 从外部驱动的波长选择滤波器，与所述有源光纤串联连接; 用于从所述有源光纤中抽出发射信号的装置; 用于定义包括有源光纤，泵浦装置，调制器，滤波器和信号绘制装置的激光腔的装置，其中可驱动调制器适于产生由有源光纤产生的发射信号的调制， 锁定振荡发射信号在空腔中，其中波长选择滤波器由光波导单片滤波器组成，在不存在进行空间配置修改的组件的情况下。

公开(公告)号：US5570438A

公开(公告)日：1996-10-29

申请号：US455549

申请日：1995-05-31

申请人： Flavio Fontana ,  Pierluigi Franco

发明人： Flavio Fontana ,  Pierluigi Franco

IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/07 ,  H01S3/083 ,  H01S3/094 ,  H01S3/106 ,  H04B10/02 ,  H04B10/18 ,  G02B6/28 ,  H04B10/04

CPC分类号： H04B10/25077

摘要： A high-transmission-speed optical connection comprising a pulse-generation laser source, optical-fibre transmission means and a receiver, in which said optical-fibre means forms an optical fibre path, such that a pulsed signal of the soliton type is subjected to a broadening in time greater than 50% by effect of the chromatic dispersion, in which said laser source comprises an active and harmonic mode-locking optical-fibre laser wherein the fibre length, filter pass-band and power in the cavity are selected for emitting pulses of a Gaussian temporal profile having such a duration and bandwidth that, at the receiver, the duration of the pulses themselves is not more than 15% higher than the duration at the emission.

摘要翻译： 一种包括脉冲发生激光源，光纤传输装置和接收器的高速传输速度光学连接，其中所述光纤装置形成光纤路径，使得孤子型的脉冲信号经受 其中所述激光源包括有源和谐波模式锁定光纤激光器，其中光纤长度，滤波器通带和腔中的功率被选择用于发射 具有这样的持续时间和带宽的高斯时间分布的脉冲在接收机处的脉冲持续时间本身不比发射持续时间高15％。

公开(公告)号：US5777766A

公开(公告)日：1998-07-07

申请号：US739166

申请日：1996-10-30

申请人： Flavio Fontana ,  Pierluigi Franco ,  Ilaria Cristiani

发明人： Flavio Fontana ,  Pierluigi Franco ,  Ilaria Cristiani

IPC分类号： G02F1/35 ,  G02F2/00 ,  H04B10/00 ,  H04L7/00

CPC分类号： H04L7/0075

摘要： The device and method are based on tapping off a predetermined line signal fraction and inputting it, together with a continuous pumping radiation, to a resonant cavity which comprises a non-linear wave guide. The value of the pumping wavelength is related to the wavelength of the line signal pulses to produce therewith a four-wave mixing (FWM) effect in the non-linear wave guide. In travelling the non-linear wave guide, a clone signal is generated by FWM effect which duplicates the pulse sequence of the line signal at a clone wavelength. By adjusting the length of the resonant cavity such that, in inputting the line signal, each of its pulses will come in at exactly a pulse of the clone signal which is being circulated within the cavity, a clone signal can be circulated within the resonant cavity whose pulse sequence represents the optical clock signal sought.

摘要翻译： 该装置和方法是基于将预定的线信号分数抽出，并将其与连续泵浦辐射一起输入到包括非线性波导的谐振腔。 泵浦波长的值与在线信号脉冲的波长相关，以在非线性波导中产生四波混频（FWM）效应。 在行进非线性波导中，通过FWM效应产生克隆信号，该克隆信号在克隆波长处复制线信号的脉冲序列。 通过调节谐振腔的长度，使得在输入线路信号时，其每个脉冲将精确地进入正在腔内循环的克隆信号的脉冲，克隆信号可以在谐振腔内循环 其脉冲序列表示所寻求的光时钟信号。

公开(公告)号：US5910852A

公开(公告)日：1999-06-08

申请号：US759792

申请日：1996-12-03

申请人： Flavio Fontana ,  Federico Franzoso ,  Giuseppe Ravasio ,  Claudio Zammarchi

发明人： Flavio Fontana ,  Federico Franzoso ,  Giuseppe Ravasio ,  Claudio Zammarchi

IPC分类号： G02B6/024 ,  G02B27/28 ,  H04B10/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/135 ,  H04B10/142 ,  H04B10/152 ,  H04B10/18 ,  H04B10/00

CPC分类号： H04B10/2537 ,  H04B10/532

摘要： An optical communication system is described which includes an optical source; an optical modulator, receiving a transmission signal having frequencies included within a signal band and adapted to emit a modulated optical signal of a predetermined optical bandwidth; an optical transmission line comprising an optical fiber portion; and an optical receiver adapted to receive the optical signal in the presence of a predetermined SNR in the signal band, measured in a 5 MHz band. The telecommunication system further comprises, optically connected between the optical modulator and the optical transmission line, a depolarizer comprising two polarization-maintaining optical fiber portions, optically connected with each other in such a manner that the respective polarization axes form an angle of 45.degree., in which the optical bandwidth, lengths and birefringence of the polarization-maintaining optical fibers are operatively selected so that the SNR at the receiver in the signal band does not differ more than 1 dB from the SNR at the receiver measured in a band of 5 MHz by substituting the optical fiber portion of the transmission line with a passive attenuator of same attenuation.

摘要翻译： 描述了包括光源的光通信系统; 光调制器，接收具有包括在信号频带内并且适于发射预定光带宽的调制光信号的频率的发射信号; 光传输线，包括光纤部分; 以及光接收机，其适于在存在以5MHz频带测量的信号频带中的预定SNR的情况下接收光信号。 电信系统还包括光连接在光调制器和光传输线之间的消偏振器，包括两个偏振保持光纤部分，它们以相应的偏振轴形成45°的角度彼此光学连接， 其中可操作地选择保偏光纤的光学带宽，长度和双折射，使得信号频带中的接收机处的SNR与在5MHz的频带中测量的接收机处的SNR相比不超过1dB 通过用相同衰减的无源衰减器代替传输线的光纤部分。

公开(公告)号：US06956466B2

公开(公告)日：2005-10-18

申请号：US10432524

申请日：2001-11-23

申请人： Renato Caretta ,  Flavio Fontana ,  Vittorio Giaroli

发明人： Renato Caretta ,  Flavio Fontana ,  Vittorio Giaroli

IPC分类号： B60C23/04 ,  B60R25/00 ,  B60R25/04 ,  B60R25/10 ,  B60R25/102

CPC分类号： B60C23/066 ,  B60R25/00 ,  B60R25/04 ,  B60R25/1004 ,  B60R25/102

摘要： An anti-theft device for a vehicle with tyre wheels includes an immobilization device, at least one detection control unit, and at least one sensor. The immobilization device activates an anti-theft procedure. The at least one detection control unit is connected to the immobilization device and verifies an alarm condition. The at least one sensor is associated with one or more of the tyre wheels, communicates with the at least one detection control unit, detects movement of one or more of the tyre wheels, and detects inflation pressure of one or more of the tyre wheels. A method for activating an anti-theft device for a vehicle with tyre wheels includes detecting an alarm condition from at least one of the tyre wheels, receiving the detected condition, and activating an anti-theft procedure.

摘要翻译： 一种具有轮胎车轮的防盗装置包括固定装置，至少一个检测控制单元和至少一个传感器。 固定装置启动防盗程序。 所述至少一个检测控制单元连接到所述固定装置并验证报警状况。 所述至少一个传感器与轮胎车轮中的一个或多个相关联，与所述至少一个检测控制单元连通，检测所述轮胎车轮中的一个或多个的运动，并且检测所述轮胎车轮中的一个或多个的充气压力。 用于启动具有轮胎车辆的车辆的防盗装置的方法包括从轮胎轮胎中的至少一个检测报警状况，接收检测到的状况并启动防盗程序。