Method and device for preventing wavelength of emitted light from being fluctuated during power-up of optical module

A technology of optical modules and optical wavelengths, applied in the coupling of optical waveguides, electromagnetic transceivers, optical guides, etc., can solve the problem of damaging the emitting laser and achieve the effect of avoiding optical wavelength fluctuations

Inactive Publication Date: 2019-12-06
HISENSE BROADBAND MULTIMEDIA TECH
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Problems solved by technology

[0005] This application provides a method and device for preventing the wavelength fluctuation of the emitted light when the optical module is powered on, so as to

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  • Method and device for preventing wavelength of emitted light from being fluctuated during power-up of optical module
  • Method and device for preventing wavelength of emitted light from being fluctuated during power-up of optical module
  • Method and device for preventing wavelength of emitted light from being fluctuated during power-up of optical module

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Embodiment Construction

[0028] The wavelength of the output light of the transmitting laser of the optical module changes with the change of temperature. This change will be within a certain range. Different products need to output light with different wavelengths, so different optical modules have corresponding TECs inside to control the temperature. , so that the emitting laser has been working at a fixed temperature, rather than changing with the ambient temperature.

[0029] The light wavelength output by the emitting laser and the operating temperature of the emitting laser can be considered to be a positively correlated linear relationship, such as figure 1 As shown, the temperature oscillation of the emitting laser will cause the output light wavelength to fluctuate up and down, and the waveform of this fluctuation is similar to the waveform of temperature oscillation.

[0030] In order to avoid that when the optical module is powered on, the current temperature of the transmitting laser is di...

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Abstract

The invention discloses a method and device for preventing wavelength of an emitted light from being fluctuated during power-up of an optical module. When the optical module is powered up, a controller only sends a first turn-on instruction to a TEC control circuit, so as to control a TEC to be turned on. The controller determines delay time according to a temperature difference between temperature of an emitting laser and a target temperature value and sends a second turn-on instruction to the emitting laser when turn-on wait time of the emitting laser reaches the delay time, so as to controlthe emitting laser to be turned on. At the moment, temperature of the emitting laser when starting to emit light is almost close to or equal to the target temperature value, temperature change is small, wavelength of the light can not be fluctuated or produced fluctuation is relatively small, then the laser can be protected from being interfered by temperature fluctuation, and laser can be emitted as quickly as possible. Therefore, the method and device which are provided by the invention not only can avoid light wavelength fluctuation phenomenon and protect the emitting laser but also can enable the optical module to output light with stable wavelength as quickly as possible, and standards of the optical module are met.

Description

technical field [0001] The present application relates to the technical field of optical fiber communication, and in particular to a method and device for preventing fluctuations in wavelength of emitted light when an optical module is powered on. Background technique [0002] The optical module is used to realize the conversion of photoelectric signals. The optoelectronic device in the optical module includes two parts: transmitting and receiving, and the device that realizes the sending of optical signals in the transmitting part is a transmitting laser. Different emitting lasers emit light in different wavelength ranges, that is, the operating temperature points of the emitting lasers are different, and the same emitting laser can only output optical signals in a certain range of optical wavelengths. The wavelength of the light emitted by the emitting laser has the characteristic of changing with temperature. In order for the emitting laser to emit an optical signal of th...

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Application Information

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IPC IPC(8): G02B6/42H04B10/40
CPCG02B6/4271G02B6/4296H04B10/40
Inventor 王麟李刚
Owner HISENSE BROADBAND MULTIMEDIA TECH
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