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1. CN108700760 - METHOD FOR GENERATING OPTICAL SIGNAL, AND DEVICE FOR GENERATING OPTICAL SIGNAL

Office China
Application Number 201780013606.0
Application Date 23.02.2017
Publication Number 108700760
Publication Date 23.10.2018
Publication Kind A
IPC
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01
for the control of the intensity, phase, polarisation or colour
03
based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50
Transmitters
516
Details of coding or modulation
54
Intensity modulation
G02F 1/03
H04B 10/54
CPC
G02F 1/0123
G02F 1/225
G02F 2001/212
H04B 10/54
Applicants NAT INST INF & COMM TECH
国立研究开发法人情报通信研究机构
Inventors KANNO ATSUSHI
菅野敦史
KAWANISHI TETSUYA
川西哲也
Agents 北京华夏正合知识产权代理事务所(普通合伙) 11017
北京华夏正合知识产权代理事务所(普通合伙) 11017
Priority Data 2016033572 24.02.2016 JP
Title
(EN) METHOD FOR GENERATING OPTICAL SIGNAL, AND DEVICE FOR GENERATING OPTICAL SIGNAL
(ZH) 光信号发生方法和光信号发生装置
Abstract
(EN)
To provide a method whereby a bias voltage capable of easily realizing a required extinction ratio can be controlled by utilizing a high-extinction ratio modulator even when a generic AD converter/control board is used, and a device for realizing the method. In the present invention, the step quantity (variation quantity) delta V of a control voltage is no more than 0.1 times the half-wave voltageV pion [V]. For example, in the case of searching for the minimum point, the light intensity is measured when a bias that is larger by the step voltage delta V and a bias that is smaller by the stepvoltage delta V are applied, the current bias voltage being used as a reference, and the bias voltage is moved toward the smaller of the measured light intensities. The process of setting the moved bias voltage as a reference, comparing the light intensities for the bias points in both neighboring positions, and changing the reference bias voltage is then repeated. A configuration may be adopted whereby delta V then gradually decreases in accordance with a predetermined algorithm.

(ZH)
本发明提供一种通过使用高消光比调制器,即使使用通用的AD转换器和控制板,也能控制能够容易地实现所要求的消光比的偏置电压的方法、和实现该方法的装置。使控制电压的阶跃量(突变量)ΔV为半波电压VΠ[V]的0.1倍以下。例如,在寻找最小点的情况下,以当前的偏置电压为基准,计测施加比当前的偏置电压大阶跃电压ΔV的偏置电压和比当前的偏置电压小阶跃电压ΔV的偏置电压时的光强度,使偏置电压向其中小的一方移动。然后,反复执行以下处理:以该移动后的偏置电压为基准,比较位于左右相邻的电位的偏置点的光强度,改变成为基准的偏置电压。此时,也可以使ΔV按照规定的算法逐渐变小。

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