Method and device used for controlling wavelength of light emitting component

Abstract

The invention relates to a method and a device used for controlling a wavelength of a light emitting component. The device comprises a microcontroller, a light emitting component temperature control unit, an analog-digital converter, a digital-analog converter, a memory unit, a thermistor of a negative temperature coefficient at the interior of a TOSA device and a TEC component. The microcontroller comprises an ADC input interface, a DAC output interface, a GPIO output interface, an external communication interface and a memory interface. The light emitting component temperature control unit comprises a switch-off enabling control circuit, a temperature detection circuit, an error amplification comparison compensation unit, a TEC voltage/current limiting circuit, a TEC voltage/current detecting circuit and a TEC differential voltage driver. The method and the device used for controlling the wavelength of the light emitting component are simple and flexible; precise control of the wavelength is realized; and meanwhile, the adjustment function of the wavelength is considered.

Description

technical field [0001] The present invention relates to an optical communication device, in particular to a light emitting component, in particular to a method and device for controlling the wavelength of the light emitting component. Background technique [0002] As the communication rate of optical fiber network is getting higher and higher, the bandwidth requirements of optoelectronic devices such as lasers and photodiodes are also getting higher and higher. However, under the existing technical conditions, the bandwidth of a single optoelectronic device is not enough to support the communication rate of optical fiber network Therefore, a variety of multiplexing technologies have emerged, among which wavelength division multiplexing technology is a relatively economical and easy-to-implement technical solution. [0003] Generally, a laser is used to generate an optical signal inside an optical transmitting assembly (TOSA) in an optoelectronic transceiver module or an opto...

AI Technical Summary

Problems solved by technology

In the existing TOSA temperature control system, the switching circuit control is mostly used, and the switching circuit controls the current applied to both ends of the TEC. This circuit has the characteristics of simple structure and easy operation, but it has large temperature fluctuations and cannot be stabilized at the set value. question on

These problems will cause changes in the wavelength of the laser. The wavelength change will cause changes in the output optical power in the TOSA component of multi-laser plus wavelength division multiplexer. If the wavelength changes greatly, it will even cause some wavelengths to have no optical output. It leads to an increase in the bit error rate of the optical transmission system, which directly affects the performance of the optical transmission system

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