Unlock instant, AI-driven research and patent intelligence for your innovation.

Automatic control system of tunable laser based on lock wave

An automatic control system and a technology for tuning lasers, applied in general control systems, control/adjustment systems, lasers, etc., can solve the problems of inability to achieve stable wavelength control and high requirements for wavelength control accuracy, and achieve easy implementation, simple circuit, and control high precision effect

Active Publication Date: 2008-05-07
WUHAN TELECOMM DEVICES
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with fixed-wavelength LDs, tunable LDs have high requirements for wavelength control accuracy, and the wavelength error must be less than 0.02nm. Therefore, the original method that only uses bias current control circuits and temperature control circuits can no longer achieve stable wavelength control.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Automatic control system of tunable laser based on lock wave
  • Automatic control system of tunable laser based on lock wave
  • Automatic control system of tunable laser based on lock wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] specific implementation plan

[0054] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0055] 1. The structure of each function block

[0056] 1. Temperature control circuit (30)

[0057] As shown in Figure 3, the temperature control circuit (30) includes a digital potentiometer R 1 (31), temperature control instrument amplifier (32), PID circuit (33), TEC driver (34), tunable LD (20), thermistor R th (21), refrigerator (22):

[0058] The tunable LD(20) integrates the thermistor R th (21) and refrigerator (22);

[0059] Digital potentiometer R 1 (31), thermistor R th (21) is connected with temperature control instrument amplifier (32), certain temperature is set;

[0060] Temperature-controlled instrumentation amplifier (32), PID circuit (33), TEC driver (34), refrigerator (22), tunable LD (20), thermistor R th (21), temperature control instrumentation amplifier (32) closed-loop connection successively, realize the automatic c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses an automatic control system of a tunable laser based on the locking wave, relating to a laser control system. The structure of the present invention is characterized in that a singlechip (50), a temperature control circuit (3) and a tunable LD (20) are connected in turn so as to achieve the temperature control; the singlechip (50), an offset current control circuit (10) and the tunable LD (20) are connected in turn so as to achieve the offset current control; the singlechip (50), a locking wave circuit (40), the offset current control circuit (10) and the tunable LD (20) are connected in turn so as to further achieve the offset current control and the aim of wavelength locking; the tunable LD (20) is connected with the locking wave circuit (40) so as to feed back the ratio between the power monitoring current Ipmon and the wavelength monitoring current Iwlmon. The present invention with the advantages of automatic wavelength control, high control accuracy, simple circuit and easy realization is applicable to the peripheral circuit design of the temperature-control DFB tunable laser.

Description

technical field [0001] The invention relates to a laser control system, in particular to a wave-locked tunable laser automatic control system. Background technique [0002] As shown in Figure 1, the traditional light source used in optical communication networks is a fixed-wavelength laser (LD). The design of the control circuit of the fixed-wavelength LD mainly includes three parts: a temperature control circuit (10), a bias current control circuit (30) and a fixed-wavelength LD (60). [0003] With the development of the transmission capacity of the optical communication network, the demand for the number of wavelengths is increasing, and the emergence of tunable LD just meets this demand. Tunable LDs are technically divided into: current control technology, temperature control technology and mechanical control technology. The invention is mainly aimed at the control of the temperature-controlled DFB laser. Compared with fixed-wavelength LDs, tunable LDs have high requir...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/06H01S3/10G05B19/042G05D23/24G05F1/56
Inventor 田军高繁荣陈龙许远忠
Owner WUHAN TELECOMM DEVICES