High-power narrow-pulse laser light source

Abstract

The invention discloses a pulse laser light source capable of generating a nanosecond-level high-power narrow-pulse light and providing a light peak power of 100 W. The pulse laser light source is characterized by comprising a pump laser, a pump laser constant-current driving module, a distributed feedback (DFB) laser, a pulse signal generation module, a narrow-pulse driving module, an optical wavelength division multiplexer (WDM) and erbium-doped fiber, wherein the optical WDM is connected with output ends of the DFB laser and the pump laser and one end of the erbium-doped fiber and used for coupling narrow-pulse lights generated by light seed sources (the DFB laser) of different wavelengths with a pump light into the erbium-doped fiber; and the erbium-doped fiber is used for exciting erbium ions to a high-energy-level (three-energy-level) system under the action of a pump laser when a DFB laser and the pump laser simultaneously enter the erbium-doped fiber, then quickly decaying the erbium ions to a metastable-state-energy-level system, and transmitting a photon corresponding to the DFB laser when the erbium ions are returned to a ground-state-energy-level system under the action of the DFB laser to make the DFB laser amplified. The pulse laser light source meets requirements on development of a distributed optical fiber temperature sensing system.

Description

technical field [0001] The invention relates to a laser light source, in particular to a pulsed laser light source capable of generating nanosecond-level high-power narrow pulse light with an optical peak power of 100W. Background technique [0002] With the rapid development and wide application of the optoelectronic industry, people have higher and higher requirements for the performance and design indicators of high-power narrow-pulse laser light sources. For example, from the perspective of distributed optical fiber sensing technology, the narrower the high-power optical pulse signal is, the more beneficial it is to improve the sensing performance. The traditional "narrow pulse" technology realized by various modulations of semiconductor lasers is gradually difficult to meet the demand. In distributed optical fiber sensing technology, the generation of nanosecond high-power narrow pulse light is a key technology. A distributed feedback (DFB) laser is a laser suitable f...

AI Technical Summary

Problems solved by technology

[0003] The design principle of the traditional narrow-pulse high-power laser is that the synchronous signal triggers the high-power transistor to drive the high-power semiconductor laser to control the optical pulse trigger frequency, and controls the output optical pulse width of the semiconductor laser by selecting different energy storage capacitors C. , there are shortcomings such as large output optical pulse width of semiconductor lasers, small optical peak power (≤5W), low precision, poor stability, etc.

Images