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

optical module

An optical module and backlight technology, applied in the field of optical modules, can solve the problem of unstable laser output power, and achieve the effect of avoiding output power reduction, avoiding optical power interference, and ensuring optical power.

Active Publication Date: 2021-06-01
HISENSE BROADBAND MULTIMEDIA TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of this application provides an optical module, which can be used to solve the problem of unstable laser output power caused by mutual interference when two lasers in the optical module are turned on at the same time

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
  • optical module
  • optical module
  • optical module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0040] Before explaining the embodiment of the present application in detail, the APC closed-loop mechanism of the optical module is briefly described.

[0041] Such as figure 2 As shown, one LD201, one PD202 and one driver 203 in the optical module can form a closed-loop system. Among them, LD201 and driver 203 are connected.

[0042] It should be noted that the driver 203 can output a bias current to the LD201, and the LD201 emits light under the drive of the bias current. Among them, most of the light emitted by the LD201 is emitted along the outgoing direction, and this part of the light can be called the front light. In addition, a very small part of the light will be irradiated on the PD202 along the direction opposite to...

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 application discloses an optical module, which belongs to the technical field of optical devices. In this application, when only the first LD is turned on, the first driver may directly compare the current value of the backlight current fed back by the first PD with the first backlight current reference value, and then drive the first LD to emit light. When the two LDs are turned on at the same time, the first driver may subtract a preset value from the current value of the backlight current fed back by the first PD, and then compare it with the first backlight current reference value. When two LDs are turned on at the same time, the backlight current fed back by the PD is larger than the current fed back when only one LD is turned on. Therefore, the current fed back by the PD is subtracted from a preset value and then compared with the backlight current reference value. In this way, the problem of LD output power reduction caused by the increase of the current fed back by the PD under the interference of another LD can be effectively avoided, thereby ensuring the stability of the optical power output by the LD.

Description

technical field [0001] The present application relates to the technical field of optical devices, in particular to an optical module. Background technique [0002] A laser and a driver may be included in the optical module. Generally, the laser may include an LD (laser diode, laser diode) and a PD (photo detector, backlight detector). Wherein, the driver provides working current to the LD of the laser, and the LD outputs light under the action of the working current. Most of the light output by the LD will be emitted along the outgoing direction. This part of the light is called the front light, and a very small part of the light will be irradiated on the PD along the opposite direction of the outgoing direction. This part of the light can be called the backlight . The PD can convert the received backlight into a backlight current, and feed back the backlight current to the driver. Since the ratio of the front light to the back light is constant, the magnitude of the bac...

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 Patents(China)
IPC IPC(8): G02B6/42H01S3/13
CPCG02B6/4246G02B6/4274H01S3/1305
Inventor 张强赵其圣
Owner HISENSE BROADBAND MULTIMEDIA TECH