10G-PON OLT optical module based on temperature control direct modulation laser

Abstract

The invention relates to a 10G-PON OLT optical module based on a temperature control direct modulation laser, and belongs to the technical field of semiconductor laser refrigeration and optical communication. A direct modulation laser (DML) is adopted as a 10G-PON 1577nm downlink light source, and the temperature of a TEC is dynamically adjusted at different working environment temperatures, so that the power consumption of the OLT optical module in a full-temperature working range is effectively reduced. Meanwhile, the relative temperature difference between the TEC temperature control point and the external working environment temperature is effectively reduced, so that the optical module can normally work in an extended temperature range or even an industrial temperature range.

Description

technical field [0001] The invention belongs to the technical fields of semiconductor laser cooling and optical communication, and in particular relates to a 10G-PON OLT optical module based on temperature control and directly modulating lasers. Background technique [0002] As a new-generation broadband solution, the optical fiber access network has been widely used to provide users with a high-bandwidth, full-service access platform. And FTTH (Fiber To The Home, fiber to the home, connecting the fiber directly to the user's home) is known as the most ideal business transparent network and the ultimate way of access network development. [0003] Among various schemes, PON (Passive Optical Network, Passive Optical Network) is the best choice for point-to-multipoint (P2MP) optical fiber access. PON is an optical distribution network that is applied to the access network, between the central office equipment (OLT) and multiple user end equipment (ONU / ONT) through passive opti...

AI Technical Summary

Problems solved by technology

[0011] 1. The process of EML laser itself is complicated, the cost is high, and the output optical power is low;

[0012] 2. Use TEC to control the working temperature of EML laser, resulting in excessive power consumption

Especially in high-temperature application environments, power consumption has become a difficult problem to solve;

[0013] 3. The current EML for the 10G-PON market has a TEC setting temperature of about 45°C. If the optical module needs to work at an ultra-high temperature (80-85°C for the shell), the relative temperature difference is too large. In most cases, the TEC is very low. It is difficult to stabilize the working temperature at 45°C;

[0014] 4. The working wavelength of EML and the relative position of the absorption peak adjusted by EAM must be controlled by the setting temperature of TEC, which cannot be effectively adjusted according to the environmental conditions;

[0015] 5. The overall cost of optical components is high

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