Active-passive hybrid mode-locked fiber laser pulse generation system

A fiber laser, active and passive technology, applied in the direction of lasers, laser parts, phonon exciters, etc., can solve the problems of poor output light pulse stability, narrow laser spectrum, and difficulty in obtaining ultra-narrow pulses, etc., and reach the absorption wavelength range Large, stable system output, and the effect of overcoming cavity length drift

Inactive Publication Date: 2019-06-18
JILIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] However, the output laser spectrum of active mode-locked fiber lasers is relatively narrow, and it is difficult to obtain ultra-narrow pulses. Moreover, the cavity length of active mode-locked fiber lasers is generally long, which is easily affected by the outside world, resulting in poor stability.
[0006] Passively mode-locked fiber laser has simple structure, low cost and high reliability. It is a real all-fiber device. Using the nonlinear effect of fiber, it can generate the shortest optical pulse, but its output pulse repetition frequency has poor stability and cannot be adjusted externally.
[0007] To sum up, the existing active or passive mode-locked fiber laser systems have their own inherent shortcomings, especially because the existing mode-locked fiber laser systems do not adopt effective automatic control, which makes the stability of the output optical pulse poor

Method used

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Embodiment 1

[0020] Embodiment 1: Concrete structure of the present invention

[0021] The active-passive hybrid mode-locked fiber laser pulse generation system structure of the present invention is as attached figure 1 As shown, its structure is that the pump light source 1 (980nm laser, the maximum output power is 1W) is connected to the 980nm end of the wavelength division multiplexer 2 (980 / 1550nm wavelength division multiplexer), and the wavelength division multiplexer 2 The 1550nm end is connected to the input end of the first optical coupler 3 (1×2 standard single-mode optical coupler, with a splitting ratio of 10:90); the 10% output end of the first optical coupler 3 is connected to the polarization controller 4 (three One end of the ring-type mechanical fiber polarization controller) is connected, and the optical pulse output by it continues to run in the resonator of the active mode-locked fiber laser, and 90% of the output end of the first optical coupler 3 is connected to the ...

Embodiment 2

[0023] Embodiment 2 Working process of the present invention and the effect of each main component

[0024] attached figure 1 In the structure shown, the pumping light source 1 is used as the laser pumping source of the whole system, and the pumping light source 1 enters the system through the wavelength division multiplexer 2; the first optical coupler 3 with a splitting ratio of 10:90 connects The running laser is divided into two parts, one part (90%) is output to the third optical coupler 11, and the other part (10%) continues to run in the resonator of the active mode-locked fiber laser; the third light splitting ratio is 40:60 The coupler 11 divides the laser light output by the first optical coupler 3 into two parts, one part (60%) is used as the laser output of the whole system, and the other part (40%) is output to the fourth optical coupler 12 as a feedback signal of the system; The polarization controller 4 is used to control the polarization state in the system; th...

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Abstract

The invention discloses a pulse generation system for an active and passive mixing locking die optical fiber laser, and belongs to the technical field of optical communication devices. The system has a main structure including an active locking die optical fiber laser resonance chamber which is composed of a pumping light source (1), a wavelength division multiplexer (2), a first photo-coupler (3), a polarizing controller (4) and the like, as well as a passive locking die optical fiber laser system which is composed of a dispersion compensating fiber (22), black phosphorus saturated absorber (21) and the like and a pulse optimizing system which is composed of two automatic feedback control rings. By adopting the active and passive mixing locking die technology, a part of output laser is received by a photodetector, an adjustable optical fiber delay line is controlled by utilizing feedback of a singlechip to realize optimization of output pulse of the whole system, so that stable ultra-short high-speed optical pulse of the whole system is produced, the operation is simple and accurate control can be achieved.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, in particular to an active-passive hybrid mode-locked fiber laser pulse generation system. Background technique [0002] With the rapid development of the national economy and the arrival of the information age, optical fiber communication technology has penetrated into various communication and information networks. Fiber lasers are ideal light sources for fiber optic communications and have many advantages over traditional solid-state lasers, and have been extensively studied in recent years. Mode-locked fiber lasers in fiber lasers are ideal for pulsed light sources in optical communication systems. [0003] Common structures of mode-locked fiber lasers include active mode-locked and passive mode-locked fiber lasers. Among them, the active mode-locked fiber laser has narrow output pulse width, small frequency chirp and tunable frequency, so it has great application pros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/11H01S3/067
CPCH01S3/067H01S3/06725H01S3/1106
Inventor 霍佳雨高博郭玉彬孙铁刚
Owner JILIN UNIV
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