An active-passive hybrid mode-locked fiber laser with temperature compensation

A fiber laser, temperature compensation technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of poor output pulse repetition frequency stability, poor stability, difficult to obtain ultra-narrow pulses, etc., and reach the absorption wavelength range. Large, overcoming poor stability, overcoming the effect of cavity length drift

Inactive Publication Date: 2019-06-18
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 current 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, so that the stability of the output optical pulse is affected by temperature. Environmental factors such as

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  • An active-passive hybrid mode-locked fiber laser with temperature compensation
  • An active-passive hybrid mode-locked fiber laser with temperature compensation

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Embodiment 1

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

[0023] The structure of an active-passive hybrid mode-locked fiber laser with temperature compensation of the present invention is shown in the attached figure 1 As shown, the structure is that the pumping light source 1 (980nm laser, the maximum output power is 1W) is connected to the input end of the fifth optical coupler 25 (1×2 standard single-mode optical coupler, the splitting ratio is 10:90) 90% output of the fifth optical coupler 25 is connected with the 980nm end of the wavelength division multiplexer 2 (980 / 1550nm wavelength division multiplexer), and the 1550nm end of the wavelength division multiplexer 2 is connected with the first optical coupler 3 (1×2 standard single-mode optical coupler, the splitting ratio is 10:90) connected to the input end; the 10% output end of the first optical coupler 3 is connected to the adjustable optical fiber filter 4 (produced by Beijing Zhongxun Spectrum Technolog...

Embodiment 2

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

[0026] 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 25, 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 adjustable...

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Abstract

The invention discloses an active and passive hybrid mode-locked optical fiber laser with a temperature compensation function, and belongs to the technical field of optical communication devices. The main structure comprises an active mode-locked optical fiber layer resonant cavity, a temperature compensation system, a passive mode-locked optical fiber laser system and a pulse optimizing system, wherein the active mode-locked optical fiber layer resonant cavity is formed by a pumping light source (1), a wavelength-division multiplexer (2), a first optical coupler (3), an adjustable optical fiber filter (4); the temperature compensation system is formed by absolute ethyl alcohol filled photonic crystal fiber (27), a third optical probe (28) and a second amplifying circuit (29); the passive mode-locked optical fiber laser system is formed by dispersion compensation optical fiber (22) and a black phosphorus saturable absorber (21); the pulse optimizing system is formed by two feedback control rings. Active and passive hybrid mode locking is adopted, a feedback technology is used for conducting automatic feedback control over active and passive hybrid mode-locked optical fiber laser systems, the optical fiber laser has the temperature compensation function, and optical pulses in the system can be optimized better and stable.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, in particular to an active and passive hybrid mode-locked fiber laser with temperature compensation. 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 applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/11H01S3/13
CPCH01S3/1109H01S3/1112H01S3/1305
Inventor 吴戈高博霍佳雨田小建马春阳
Owner JILIN UNIV
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