Automatic temperature control apparatus of pump laser for ASE broadband light source

Abstract

The invention designs an automatic temperature control circuit which has exact control, reliable and stable performance and complete protective measures, and is used for executing effective real time control on the temperature of a tube core of a pump laser in ASE broadband light source. The control device adopts the design proposal of a temperature control system based on Proportion Integration Differentiation (PID) control and pulse-width modulation (PWM) braking mechanism and realizes the designs by adopting a pure hardware circuit; the control device comprises a reference voltage circuit, a pumping tube core temperature testing circuit, a thermoelectric voltage amplifier circuit, a PID controller, a pumping refrigeration current limiting protective threshold set circuit, an efficient PWM control driver, a pumping semiconductor refrigerator and a pumping tube core temperature out-of-limit close protective circuit. The whole circuit has simple and compact design, high reliability as well as heating and refrigerating efficiency, and little self heating, thereby greatly reducing the power consumption and volume of a pumping temperature controller; as the control device has the complete protective function, when the temperature of the pumping tube core exceeds the set range of operating temperature, the circuit sends out the gang control signal to automatically close a drive circuit of the pumping. The pumping refrigeration current limiting protective circuit limits the refrigeration current within the range of the preset maximum refrigeration current range to prevent the pumping from being damaged.

Description

technical field [0001] The invention relates to an automatic temperature control device, in particular to an automatic temperature control device for a pump laser used as an ASE (amplified spontaneous emission, amplified spontaneous emission) broadband light source. Background technique [0002] In the 21st century, optical communication technology has developed rapidly. The optical transmission system has experienced the development process of the quasi-synchronous digital hierarchy (PDH) system, the synchronous digital hierarchy (SDH) system, and the very popular Dense Wavelength Division Multiplexing (DWDM) system. In particular, the emergence of DWDM technology has greatly The capacity and speed of data transmission in the system have been improved. The advancement of optical communication technology has driven the overall development of the optical communication industry. Various related optical passive device manufacturers, optical active device manufacturers, Erbium-...

AI Technical Summary

Problems solved by technology

It has high requirements on the working temperature of the die. Only in a suitable working temperature range can the pump laser work safely and reliably. Any excessive temperature change will cause the central working wavelength of the pump laser to drift, and the working efficiency will drop significantly. , and even damage the pump laser, and this damage is irreversible

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