A high-stability active-passive hybrid mode-locked optical soliton generation system

A high-stability, active-passive technology, used in lasers, phonon exciters, laser components, etc., can solve the problems of poor output optical pulse stability, poor output pulse repetition frequency stability, and difficulty in obtaining ultra-narrow pulses. Achieve the effects of stable output soliton pulse, wide absorption wavelength range, and 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

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Embodiment 1

[0021] Embodiment 1: Concrete structure of the present invention

[0022] The structure of a high-stability active-passive hybrid mode-locked optical soliton generation system of the present invention is shown in the attached figure 1 As shown, the structure is that the pump light source 1 (980nm laser, the maximum output power is 1W) is connected to the input end of the fifth optical coupler 27 (1×2 standard single-mode optical coupler, the splitting ratio is 10:90) , the 90% output end of the fifth optical coupler 27 is connected with the 980nm end of the wavelength division multiplexer 2, and the 980nm end of the wavelength division multiplexer 2 (980 / 1550nm wavelength division multiplexer) is connected, and the wavelength division multiplexer The 1550nm end of 2 is connected to the input end of the first optical coupler 3 (1×2 standard single-mode optical coupler, the splitting ratio is 10:90); the 10% output end of the first optical coupler 3 is connected to the polariza...

Embodiment 2

[0024] Embodiment 2 Working process of the present invention and the effect of each main component

[0025] attached figure 1 In the shown structure, the pump light source 1 is used as the laser pump source of the whole system, the pump light source 1 passes through the fifth optical coupler 27, and a part (90%) of the output enters the system through the wavelength division multiplexer 2; The first optical coupler 3 with a ratio of 10:90 divides the laser light running in the cavity into two parts, one part (90%) is output to the third optical coupler 11, and the other part (10%) continues to resonate in the active mode-locked fiber laser Intra-cavity operation; the third optical coupler 11 with a splitting ratio of 40:60 divides the laser output from the first optical coupler 3 into two parts, one part (60%) is used as the laser output of the entire system, and the other part (40%) Output to the fourth optical coupler 12 as the feedback signal of the system; The polarizati...

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Abstract

The invention discloses a high-stability active and passive hybrid mode-locked optical soliton generation system and belongs to the technical field of optical communication devices. The system mainly comprises an active mode-locked fiber laser resonator formed by a pump light source (1), a wavelength division multiplexer (2), a first optical coupler (3) and a polarization controller (4), a temperature compensation system formed by an absolute ethyl alcohol filled photonic crystal fiber (29), a third optical detector (30) and an amplification circuit (31), a passive mode-locked fiber laser system formed by a dispersion compensation fiber (24) and a black phosphorus saturable absorber (25) and a pulse optimization system formed by two feedback control loops. The system adopts active and passive hybrid mode locking, utilizes a feedback technology to respectively carry out automatic feedback control on the active and passive mode-locked fiber laser systems and has a temperature compensation function, so that the optical pulse in the system is more optimal and stable.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, in particular to a high-stability active-passive hybrid mode-locked optical soliton 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 appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/098
CPCH01S3/1109H01S3/1118
Inventor 吴戈高博霍佳雨田小建马春阳
Owner JILIN UNIV
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