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A chaotic semiconductor laser based on random optical feedback and its application method

A random feedback and semiconductor technology, which is applied in the direction of semiconductor lasers, lasers, laser components, etc., can solve the problems of loss, weak backscattered light, etc., and achieve the effect of simple process, low delay and wide spectrum, and improved controllability

Active Publication Date: 2020-06-30
WUHAN TELECOMM DEVICES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The backscattered light generated when the light propagates in the erbium-doped fiber is relatively weak. During the feedback process of the original backscattered light, loss occurs due to reasons such as fiber length, fiber material, and structural defects in the optical waveguide. Part of the feedback light may It has been completely lost before entering the semiconductor optical amplifier chip

Method used

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  • A chaotic semiconductor laser based on random optical feedback and its application method
  • A chaotic semiconductor laser based on random optical feedback and its application method

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Embodiment 1

[0038] Embodiment 1 of the present invention provides a chaotic semiconductor laser based on random optical feedback, such as figure 1 As shown, it includes a left distributed feedback semiconductor laser 1, a fiber coupler 2, a pump laser 3, a wavelength division multiplexer 4, an erbium-doped fiber 5 and a right distributed feedback semiconductor laser 6, specifically:

[0039] The left distributed feedback semiconductor laser 1 is connected to the first port of the fiber coupler 2 (such as figure 1 shown in the port marked with a), wherein, the fiber coupler 2 passes through the second port (such as figure 1 The port marked with b) is coupled with the wavelength division multiplexer 4, and the pump laser 3 is also coupled with the wavelength division multiplexer 4;

[0040] Described wavelength division multiplexer 4 is also connected with one end of described erbium-doped optical fiber 5 (as figure 1 Shown in the port marked with f) to be connected, wherein, the other en...

Embodiment 2

[0050] In addition to providing the chaotic semiconductor laser structure as described in Embodiment 1, the present invention also provides a method of using a chaotic semiconductor laser based on random optical feedback, which is used to illustrate the embodiment from the perspective of the direction of the optical signal and the way it is processed. How the laser structure described in 1 is used to generate a chaotic laser signal with corresponding effects. refer to figure 1 The described structure is described, the left distributed feedback semiconductor laser 1 emits continuous light, and after being split by the fiber coupler 2, the first part of the continuous light is input into the receiving end d of the wavelength division multiplexer 4 from the b end, and the second part of the light is used as The output terminal h is as follows:

[0051] The pump laser 3 is connected to the receiving end c of the wavelength division multiplexer 4, so that the signal light and the ...

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Abstract

The invention relates to the technical field of chaotic semiconductor lasers, and provides a chaotic semiconductor laser based on random optical feedback and a using method thereof. A left distributedfeedback semiconductor laser 1 is connected to a first port of an optical fiber coupler 2, the optical fiber coupler 2 is coupled with a wavelength division multiplexer 4 through a second port, and the wavelength division multiplexer 4 is also coupled with a pump laser 3 at the same time; the wavelength division multiplexer 4 is also connected to one end of an erbium-doped optical fiber 5, and the other end of the erbium-doped optical fiber 5 is connected with a right distributed feedback semiconductor laser 6. Through the structure of the chaotic semiconductor laser, backward scattering andforward amplification are simultaneously conducted, it can be ensured that backward scatter light cannot be completely lost in the transmission process, the random disturbance caused by any position of the entire erbium-doped optical fiber on the left and right distributed feedback semiconductor lasers is achieved, a random disturbance signal has no fixed outer cavity length information, and therefore the delay features can be eliminated.

Description

【Technical field】 [0001] The invention relates to the technical field of chaotic semiconductor lasers, in particular to a chaotic semiconductor laser based on random optical feedback and a use method thereof. 【Background technique】 [0002] In recent years, chaotic laser has been widely used in chaotic confidential optical communication, chaotic laser radar, chaotic optical time domain reflectometer, high-speed true random number generation, chaotic ultra-wideband signal generator and distributed optical fiber sensing, etc. Research hotspots of foreign scholars. Chaotic lasers can be generated by providing disturbances to semiconductor lasers, and the optical feedback method has a simple structure and is easy to adjust and control as the main method of generating chaotic lasers. [0003] However, the output signal of the current chaotic laser generated by optical feedback will carry information related to the length of the feedback cavity, that is, there is a time delay fea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/0683
CPCH01S5/0683
Inventor 徐红春周日凯汪钦刘成刚王云才张明江王安帮赵彤乔丽君
Owner WUHAN TELECOMM DEVICES
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