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All-fiber mode-locked laser device based on micro-nano fiber polarizer

A technology of mode-locked lasers and micro-nano fibers, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve problems such as difficulty in precise adjustment and unstable mode-locking, and achieve the effect of continuous and stable work

Pending Publication Date: 2019-08-09
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At the same time, the traditional laser mode-locking technology has problems such as difficulty in precise adjustment and unstable mode-locking.

Method used

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  • All-fiber mode-locked laser device based on micro-nano fiber polarizer
  • All-fiber mode-locked laser device based on micro-nano fiber polarizer
  • All-fiber mode-locked laser device based on micro-nano fiber polarizer

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] A mode-locked laser based on a micro-nano fiber polarizer according to the present invention includes a pump source 1, a wavelength division multiplexer 3, an erbium-doped fiber 2, a 10:90 coupler 4, a spectrometer 5, and a polarization-independent The isolator 6, the first polarization controller 7, the micro-nano fiber polarizer 8, and the second polarization controller 9 are connected by optical fibers.

[0027] The output end of the pump source 1 is connected with the input end of the wavelength division multiplexer 3, the output end of the wavelength division multiplexer 3 is connected with one end of the erbium-doped optical fiber 2, and the other end of the erbium-doped optical fiber 2 is connected with the optical coupler 4. The input end is connected; 10% of the output end of the optical coupler 4 is connected ...

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Abstract

The invention discloses an all-fiber mode-locked laser device based on a micro-nano fiber polarizer. The laser device is characterized in that an output end of a pump source is connected with an inputend of a wavelength division multiplexer, an output end of the wavelength division multiplexer is connected with one end of an erbium-doped fiber, the other end of the erbium-doped fiber is connectedwith an input end of an optocoupler, 10% of output ends of the optocoupler are connected with a spectrometer, 90% of the output ends of the optocoupler are connected with an input end of a polarization non-correlated isolator, one side of a first polarization controller is connected with an output end of the polarization non-correlated isolator, the other side is connected with an input end of the micro-nano fiber polarizer, an output end of the micro-nano fiber polarizer is connected with one side of a second polarization controller, and the other side of the polarization controller is connected with the input end of the wavelength division multiplexer. The laser device is advantaged in that the micro-nano fiber polarizer has a linear polarization extinction ratio (LPER) of about 15 dB,and the all-fiber mode-locked laser device based on the polarizer produces a stable pulse sequence with the pulse duration of 0.92 ps.

Description

technical field [0001] The invention relates to a mode-locked laser, in particular to an all-fiber mode-locked laser based on a micro-nano fiber polarizer. Background technique [0002] Ultrafast pulses are widely used in many fields such as precision measurement, optical communication and nonlinear optics due to their irreplaceable advantages. Passively mode-locked fiber lasers have attracted widespread attention because they are very suitable for the generation of ultrafast pulses. Prior to this, various mode-locking techniques such as nonlinear optical loop mirror (NOLM), semiconductor saturable absorber (SA) and nonlinear polarization rotation (NPR) have been proposed and developed to some extent. In general, NOLM technology is difficult to adjust precisely and requires a figure-of-eight cavity; saturable absorbers made of semiconductors, graphene or topological insulators are difficult to produce and are highly dependent on the characteristics of the material; NPR techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/11
CPCH01S3/06712H01S3/1115
Inventor 张祖兴胡伟翔张鹏程周夏冰钱禹豪
Owner NANJING UNIV OF POSTS & TELECOMM
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