Mode selection coupler based 8-shaped cavity mode locking column vector fiber laser

A fiber laser and mode selection technology, applied in lasers, laser components, phonon exciters, etc., can solve the problems of complex structure of ultrashort pulse column vector laser, low loss of fiber laser, high production cost, etc., to achieve economical and convenient , small insertion loss and compact structure

Pending Publication Date: 2017-06-13
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The solution of the present invention is to overcome the disadvantages of complex structure, large loss, low efficiency and expensive production cost of producing ultrashort pulse column vector laser in the prior art, and provide a new method for producing ultrashort pulse column vect

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  • Mode selection coupler based 8-shaped cavity mode locking column vector fiber laser
  • Mode selection coupler based 8-shaped cavity mode locking column vector fiber laser
  • Mode selection coupler based 8-shaped cavity mode locking column vector fiber laser

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Embodiment Construction

[0024] The technical solution of the present invention will now be further described in detail in conjunction with the accompanying drawings.

[0025] The 8-character cavity mode-locked cylindrical vector fiber laser based on the mode selective coupler proposed by the present invention includes a pump source, a wavelength division multiplexer, a gain fiber, a first polarization controller, a second polarization controller, a single-mode fiber, 3dB coupler, coupler, isolator, mode selective coupler; wherein, the output end of the pump source is connected to the short-wavelength input end of the wavelength division multiplexer, and the output end of the wavelength division multiplexer passes through the gain fiber, single The mode fiber and the first polarization controller are connected to the 1-port input of the 3dB coupler, the 2-port output of the 3dB coupler is connected to the long-wavelength port of the wavelength division multiplexer, and the 4-port of the 3dB coupler is ...

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Abstract

The invention discloses a mode selection coupler based 8-shaped cavity mode locking column vector fiber laser including a pump source, a wavelength division multiplexer, a gain fiber, a single-mode fiber, a first polarization controller, a second polarization controller, a 3dB coupler, an isolator, a coupler and a mode selection coupler. The output terminal of the pump source is connected with a short wavelength input terminal of the wavelength division multiplexer. The output terminal of the wavelength division multiplexer is connected with a 1 port input terminal of the 3dB coupler through the gain fiber, the single-mode fiber and the first polarization controller successively. A 2 port input terminal of the 3dB coupler is connected with a long wavelength port of the wavelength division multiplexer. A 4 port is connected with a 3 port of the 3dB coupler through the isolator, the coupler and the mode selection coupler successively. Therefore, an 8-shaped resonance cavity is formed. The second polarization controller is connected with a less-mode fiber output terminal of the mode selection coupler. The invention has advantages of being narrow in fiber laser output pulses, high in column vector laser polarization purity, small in loss and low in cost.

Description

technical field [0001] The invention belongs to the field of optical fiber lasers, in particular to an 8-cavity mode-locked cylinder vector optical fiber laser based on a mode selective coupler. Background technique [0002] In recent years, columnar vector lasers, especially columnar vector lasers with ultrashort pulse width, have received great attention because of their symmetrical polarization and intensity characteristics, as well as the focusing characteristics of radially polarized light at high numerical apertures. It is widely used in the fields of material processing, optical tweezers, optical fiber sensing, surface plasmon excitation and optical fiber communication. [0003] At present, cylindrical vector lasers are mainly obtained by precisely adjusting the polarization state of light through bulk free-space devices such as spatial phase modulators, combined half-wave plates, birefringent crystals, and subwavelength gratings. However, the use of the above-mentio...

Claims

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Application Information

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IPC IPC(8): H01S3/098H01S3/083H01S3/067
CPCH01S3/06712H01S3/083H01S3/1115
Inventor 万洪丹汪杰蔡宇张祖兴孙兵张琳
Owner NANJING UNIV OF POSTS & TELECOMM
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