High-stability optical pulse generator

A high-stability, optical pulse technology, used in lasers, phonon exciters, laser components, etc., can solve the problem of active mode-locked fiber laser cavity length, poor output pulse repetition frequency stability, poor output optical pulse stability, etc. problems, to achieve the effect of wide bandwidth response wavelength range, high damage resistance threshold, and overcoming poor stability

Inactive Publication Date: 2017-08-11
JILIN UNIV
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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

[0022] Embodiment 1: Concrete structure of the present invention

[0023] The structure of an optical pulse generator based on piezoelectric ceramic feedback control of the present invention is shown in the 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 with the input end of the first optical coupler 3 (1×2 standard single-mode optical coupler, splitting ratio is 10:90); the 10% output end of the first optical coupler 3 is connected with the polarization controller 4 (tail Fiber-type mechanical polarization controller) is connected to one end, 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...

Embodiment 2

[0025] Embodiment 2 Working process of the present invention and the effect of each main component

[0026] 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 relates to a high-stability optical pulse generator and belongs to the technical field of optical communication devices. The high-stability optical pulse generator mainly comprises an active mode locking optical fiber laser resonant cavity composed of components of a pump light source (1), a wavelength division multiplexer (2), a first optical coupler (3) and a polarization controller (4), a passive mode locking optical fiber laser system composed of components of a dispersion compensation optical fiber (23) and a graphene saturable absorber (24) as well as a pulse optimization system composed of two automatic feedback control loops. The high-stability optical pulse generator provided by the invention has the advantages that an active and passive mixed mode locking technology is adopted, a receiving part of an optical detector is utilized for outputting lasers, a singlechip and an amplifying circuit are utilized for processing a received signal, a piezoelectric ceramic is controlled to realize optimization of an output pulse of the whole system, finally the whole system produces a stable ultrashort high-speed optical pulse, operation is simple, and accurate control can be achieved.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, and in particular relates to an optical pulse generator which utilizes an active-passive combined mode-locking technology to realize high-stability pulse output. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/098H01S3/067
CPCH01S3/06716H01S3/1109H01S3/1115
Inventor 高博霍佳雨吴戈田小建马春阳
Owner JILIN UNIV
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