an optical module

Abstract

The invention provides an optical module, and relates to the field of optical communication. The optical module comprises a laser chip, a first driving circuit, a second driving circuit and a couplinglens, the laser chip comprises a first active region and a second active region located on a same substrate, the first driving circuit drives the first active region to operate, and light emitted bythe first active region during operation is collected through the coupling lens. When the first driving circuit stops driving the first active region to operate, the second driving circuit drives thesecond active region to operate; and when the first driving circuit stops driving the first active region to operate, the second driving circuit drives the second active region to operate to generateheat, the heat generated by the second active region can produce an effect of heating the first active region to maintain the temperature of the first active region, and the stability of the light-outlet wavelength of the first active region is guaranteed.

Description

technical field [0001] The invention relates to the field of optical communication, and in particular designs an optical module. Background technique [0002] In the field of optical communication, optical modules are used to generate optical signals to realize signal transmission. Wavelength division multiplexing technology is a common bandwidth expansion technology in the field of optical communication. Wavelength division multiplexing technology uses multiple lights with different wavelengths in the same optical fiber for data transmission, and uses different wavelengths of light to distinguish different signal channels. Data transmission relies on the stability of the wavelength of the optical signal. [0003] When wavelength division multiplexing technology is adopted in PON business system of passive optical network, the stability of wavelength appears to be particularly important. In the PON network, the optical network unit ONU optical module implements optical com...

AI Technical Summary

Problems solved by technology

Specifically, the optical module of the optical network unit emits light when it realizes optical communication, and does not emit light when it does not realize optical communication. This burst mode of emitting light and not emitting light makes the laser chip of the optical module change between working and not working. When the chip is not working, no heat is generated. At this time, the temperature of the laser chip drops. When the laser chip resumes working, the temperature of the laser chip rises accordingly. The temperature of the laser chip is in the process of drastic changes, resulting in unstable wavelength of the laser chip.

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