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Doped optical fiber amplifier and work method thereof

A technology of doping optical fibers and amplifiers, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of low frequency, asynchronous light source, and low safety threshold of human eyes, and achieve high water absorption coefficient and wide application foreground effect

Inactive Publication Date: 2017-07-18
O NET COMM (SHENZHEN) LTD
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  • Claims
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Problems solved by technology

At present, most laser radar light sources use semiconductor lasers with a wavelength of 905nm, but their frequency is low and the safety threshold of human eyes is low, and the light source adopts an asynchronous working mode when scanning.

Method used

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  • Doped optical fiber amplifier and work method thereof

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Embodiment Construction

[0021] like figure 1 As shown, the doped fiber amplifier of the present invention includes: a seed source 10 for inputting signal light, a first isolator 20 connected to the seed source 10, a coupler 30 connected to the first isolator 20, and the coupling The pump laser 40 and the doped fiber 50 connected to the doped fiber 30, the second isolator 60 connected to the doped fiber 50, the optical splitter 70 connected to the second isolator 60, and the detector connected to the optical splitter 70 80 and connector 90.

[0022] The coupler 30 is a wavelength splitter, and the function of the coupler 30 is to couple the input signal and the pump light into the doped fiber 50, and transfer the energy of the pump light to the input optical signal through the doped fiber 50 to realize the input light. Amplification of the signal.

[0023] The doped optical fiber 50 is a dilute doped optical fiber 50, and the dilute ions are activated to amplify the optical signal in the 1550 nm wor...

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Abstract

The invention provides a doped optical fiber amplifier and a work method thereof. The amplifier comprises a seed source inputting signal light, a first isolator connected to the seed source, a coupler connected to the first isolator, a pump laser, a doped optical fiber, a second isolator connected to the doped optical fiber, an optical splitter connected to the second isolator and a joint connected to the optical splitter, wherein the pump laser and the doped optical fiber are connected to the coupler. The joint outputs signal light of the seed source. In the invention, an optical fiber doped with a rare earth element is used to realize 1550 nanometer signal light amplification under an effect of the pump laser. A repetition frequency of 1550 nanometer laser can reach megahertz. The laser possesses a high water absorption coefficient. When laser of a wave band radiates eyes, a damage threshold to the eyes is high so that the laser of the wave band possesses an eye safety characteristic. A light source adopts a standard pluggable-type optical module packaging form, and a wide application prospect is possessed in automatic driving, 3D scanning and other fields.

Description

technical field [0001] The invention belongs to a pluggable laser radar light source, in particular to a doped fiber amplifier and a working method. Background technique [0002] Lidar is a radar system that emits laser beams to detect the position, velocity and other characteristic quantities of targets. At present, most of the laser radar light sources use semiconductor lasers with a wavelength of 905 nm, but their frequency is low and the safety threshold for human eyes is low, and the light source adopts an asynchronous working mode during scanning. The Erbium-Doped Fiber Amplifier (EDFA) is a single-stage erbium-doped fiber amplifier designed with forward 980nm and backward 1480nm bidirectional pumping. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a doped fiber amplifier and a working method for realizing signal light amplification of 1550 nanometers through a rare-earth element-doped fiber under the action of a pump laser. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067
CPCH01S3/06754H01S3/06716H01S3/1301H01S3/094003H01S3/094
Inventor 鲁开源华一敏
Owner O NET COMM (SHENZHEN) LTD
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