Laser temperature compensation device in tunable diode laser absorption spectrum

Abstract

The invention discloses a laser temperature compensation device in a tunable diode laser absorption spectrum, which comprises an ARM chip, a temperature acquisition and filtering module and a power conversion module, wherein the temperature acquisition and filtering module and the power conversion module are connected with the ARM chip; the ARM chip is connected with DFB laser through a DAC chip and filtering module and a laser temperature control drive in sequence; and the ARM chip is connected with the DFB laser through a laser modulation module and a laser current drive in sequence. The laser temperature compensation device adopts low-temperature-drift components, thereby reducing influences imposed on the laser wavelength by temperature drift of the components. The overall device is high in integration level, small in size and power consumption, and conducive to integration and miniaturization of a system. The laser temperature compensation device disclosed by the invention is high in response speed and precision, and can carry out correction and compensation on variations of the laser wavelength within a second.

Description

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AI Technical Summary

Benefits of technology

This technology improves over existing methods by taking into account various factors such as thermal fluctuations caused by different parts inside it's housing or other sources like sunlight during operation. It also integrates multiple smaller devices together with minimal size and weight for faster responses time while maintaining precise performance levels at very low temperatures (<-200C).

Problems solved by technology

This patented describes an issue where environmental monitoring systems use tuned semi conductors laser devices that can be affected by external temperatures such as room air conditioning settings. These variations lead to errors in measuring gases emitted during combustion processes like engines. Current commercially available solutions only take into account this effect but cannot accurately predict future atmospheric conditions without taking into consideration their impact on device performance.

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