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Active-passive hybrid mode-locked pulse generation system based on black phosphorus saturable absorber

A saturable absorption, mode-locked pulse technology, applied in laser parts, electrical components, phonon exciters, etc., can solve the problems of poor output light pulse stability, narrow laser spectrum, and poor output pulse repetition frequency stability, etc. The effect of large absorption wavelength range, stable system output and optimized output pulse

Inactive Publication Date: 2019-06-18
JILIN UNIV
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  • Abstract
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  • Claims
  • 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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  • Active-passive hybrid mode-locked pulse generation system based on black phosphorus saturable absorber
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Embodiment 1

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

[0021] The structure of the active-passive hybrid mode-locked pulse generation system based on black phosphorus saturable absorber of the present invention is shown in the attachment 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...

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; ...

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Abstract

The invention discloses an active and passive hybrid mode-locked pulse generation system based on a black phosphorus saturable absorber 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 passive mode-locked fiber laser system formed by a dispersion compensation fiber (24) and the black phosphorus saturable absorber (25) and a pulse optimization system formed by two feedback control loops. The system adopts an active and passive hybrid mode-locked technology and utilizes a feedback technology to respectively carry out automatic feedback control on the active and passive mode-locked fiber laser systems, so that the whole system generates stable ultra-short high-speed optical pulse.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, in particular to an active-passive hybrid mode-locked pulse generation system based on a black phosphorus saturable absorber. 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 frequenc...

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 高博霍佳雨吴戈田小建
Owner JILIN UNIV
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