公开(公告)号：EP0140579A1

公开(公告)日：1985-05-08

申请号：EP84306535.0

申请日：1984-09-26

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Parsons, Nicholas John

IPC: H03B23/00 ,  G01S13/28

CPC classification number: H03B23/00 ,  H03B2200/0092

Abstract: It is desirable for the change of frequency of a chirp pulse to be as linear as possible to improve the signal to noise ratio.
Light from a light source (1) is sent to a first amplitude modulator (6) where it is modulated by a chirp signal from an oscillator (12). The modulated light travels along a fibre optic delay line (14) to a second amplitude modulator (15) where it is again modulated by the chirp signal. In effect the light leaving the second modulator (15) has been modulated by delayed and undelayed versions of the chirp signal. This results in a signal having a lower sideband which is representative of the frequency difference between the delayed and undelayed signals. The frequency difference remains constant if the chirp signal is linear, but any change varies the frequency difference. This variation can be used to improve linearity of the remaining part of the chirp signal still to be processed.

Abstract translation: 期望啁啾脉冲的频率变化尽可能地线性以提高信噪比。 来自光源（1）的光被发送到第一幅度调制器（6），在第一振幅调制器（6）中，来自振荡器（12）的啁啾信号被调制。 经调制的光沿着光纤延迟线（14）传播到第二幅度调制器（15），在第二幅度调制器（15）中，其被啁啾信号再次调制。 实际上，离开第二调制器（15）的光已经被啁啾信号的延迟和非延迟版本调制。 这导致具有代表延迟信号和未延迟信号之间的频率差的较低边带的信号。 如果啁啾信号是线性的，则频率差保持不变，但任何变化都会改变频率差。 该变化可以用于改善尚待处理的线性调频信号的剩余部分的线性。

公开(公告)号：EP0312190A1

公开(公告)日：1989-04-19

申请号：EP88305668.1

申请日：1988-06-21

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Parsons, Nicholas John

IPC: G02F1/03 ,  G02B6/14

CPC classification number: G02F1/0353 ,  G02F2001/0142 ,  G02F2201/124

Abstract: An electro-optic polarisation mode converter comprises a birefringent substrate defining a waveguide 12, and a chirped, interdigitated electrode (22) arranged along the waveguide, the chirp rate of the electrode being such that the relative delay imparted by the converter to two orthogonally-polarised optical waves (e.g. TE and TM polarised waves) is substantially temperature-independent.

Abstract translation: 电光偏振模式转换器包括限定波导12的双折射衬底和沿着波导布置的啁啾的叉指电极（22），电极的啁啾率使得转换器相对于两个正交的电极 极化光波（例如TE和TM偏振波）基本上与温度无关。

公开(公告)号：EP0152996A2

公开(公告)日：1985-08-28

申请号：EP85300045.3

申请日：1985-01-04

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Parsons, Nicholas John ,  Owen, Martin Phillip

IPC: G02F1/03

CPC classification number: G02F1/0356 ,  G02F1/2255 ,  G02F1/3134 ,  G02F2201/07

Abstract: Velocity matching between optical signals transmitted along a light guide (13) on a lithium niobate substrate (12) and microwave signals along transmission line electrodes (16 and 17) may be improved by positioning layers of dielectric material (14 and 15) between the substrate (12) and the electrodes (16 and 17). By improving the velocity matching the bandwidth of the device may be increased.

Abstract translation: 可以通过将电介质材料（14和15）的层定位在衬底之间来改善沿着铌酸锂衬底（12）上的光导（13）传输的光信号与沿着传输线电极（16和17）的微波信号之间的速度匹配 （12）和电极（16和17）。 通过提高速度匹配，可以增加设备的带宽。

公开(公告)号：EP0345391A1

公开(公告)日：1989-12-13

申请号：EP88305211.0

申请日：1988-06-08

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Parsons, Nicholas John

IPC: H01Q3/26 ,  G02F1/21 ,  G02B6/34

CPC classification number: H01Q3/2676 ,  G02F1/011 ,  G02F1/21

Abstract: Apparatus for controlling the phase of an amplitude-modulation signal carried by light, for example a frequency control signal for operating one module of a phased-array radar antenna, comprises: an electro-optic TE-TM converter (12) for splitting the amplitude-­modulated, plane-polarised light (at 10) into orthogonally-plane-polarised portions in a controlled amplitude ratio; a birefringent waveguide (13) for introducing a relative delay between the two portions equal to a quarter-cycle of the amplitude modulation period; and a light detector (14) for producing a signal which is a vector combination of the signals carried by the two portions, phase-shifted in accordance with the said amplitude ratio.

Abstract translation: 装置，用于控制由光携带的幅度调制信号的相位，对于实施例的频率控制信号用于操作相控阵雷达天线的一个模块，包括：电光TE-TM转换器（12），用于分离的振幅 -modulated，平面偏振光（在10）转换成以受控的振幅比正交平面偏振部分; 用于引入两个部分等于所述振幅调制周期的四分之一周期之间的相对延迟的双折射波导（13）; 和光检测器（14），用于产生一个信号的所有其是由两个部分所携带的信号的矢量组合，相移在雅舞的所述振幅比。

公开(公告)号：EP0140579B1

公开(公告)日：1988-05-25

申请号：EP84306535.0

申请日：1984-09-26

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Parsons, Nicholas John

IPC: H03B23/00 ,  G01S13/28

CPC classification number: H03B23/00 ,  H03B2200/0092

公开(公告)号：EP0152996A3

公开(公告)日：1987-11-11

申请号：EP85300045

申请日：1985-01-04

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Parsons, Nicholas John ,  Owen, Martin Phillip

IPC: G02F01/03

CPC classification number: G02F1/0356 ,  G02F1/2255 ,  G02F1/3134 ,  G02F2201/07

Abstract: Velocity matching between optical signals transmitted along a light guide (13) on a lithium niobate substrate (12) and microwave signals along transmission line electrodes (16 and 17) may be improved by positioning layers of dielectric material (14 and 15) between the substrate (12) and the electrodes (16 and 17). By improving the velocity matching the bandwidth of the device may be increased.