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A Dissipative Soliton Laser in the 2 Micron Band

A technology of dissipating solitons and lasers, which is applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of not giving spectra, etc., and achieve the effect of low insertion loss and simple structure

Active Publication Date: 2020-10-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document still fails to provide a technical solution and technical inspiration on how to solve the above-mentioned technical problem of wide and flat spectrum

Method used

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  • A Dissipative Soliton Laser in the 2 Micron Band
  • A Dissipative Soliton Laser in the 2 Micron Band
  • A Dissipative Soliton Laser in the 2 Micron Band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, the structure of the dissipative soliton laser is as figure 1 shown. The diameter of the waist section of the micro-nano fiber is 1 micron, the length L1 of the waist section is 10 cm, the central wavelength of the spectral filter is 1925 nm, and the bandwidth is 45 nm; , the optical fiber polarization beam splitter 5 and the micro-nano fiber 6 are connected in series to form the loop of the laser resonator, except the waist section of the micro-nano fiber, the tapered transition zone of the micro-nano fiber, the tail fiber of the micro-nano fiber, the gain fiber 3 and The sum L-L1 of the pigtail lengths of all devices is 3.85 m, that is, L1:(L-L1) is 1:38.5.

[0030] The activation of the mode-locked state of the dissipative soliton laser is achieved by setting the state of the fiber polarization controller 4 and the power of the pump light 1 . From figure 2 It can be seen that after the optimized combination of the parameters of the micro-nano ...

Embodiment 2

[0032] In this embodiment, the structure of the dissipative soliton laser is as figure 1 shown. Among them, the length L1 of the waist section of the micro-nano optical fiber is 5 mm, and the diameter of the waist section is 800 nm. In the loop of the laser resonator composed of the hybrid device 2, the gain fiber 3, the fiber polarization controller 4, the fiber polarization beam splitter 5 and the micro-nano fiber 6 in series, except for the waist section 7 of the micro-nano fiber, the micro-nano fiber The sum L-L1 of the lengths of the tapered transition zone 9, the pigtail 8 of the micro-nano fiber, the gain fiber 3 and all the device pigtails is 0.25 m, that is, L1:(L-L1) is 1:50. The spectral filter has a center wavelength of 1750 nm and a bandwidth of 10 nm. Depend on image 3 It can be seen that the 3 dB bandwidth of the output spectrum of the laser in this embodiment is about 13 nm, and it is very flat.

Embodiment 3

[0034] In this embodiment, the structure of the dissipative soliton laser is asfigure 1 shown. Among them, the waist length L1 of the micro-nano optical fiber is 1 m, and the diameter is 1600 nm. In the loop of the laser resonator composed of the hybrid device 2, the gain fiber 3, the fiber polarization controller 4, the fiber polarization beam splitter 5 and the micro-nano fiber 6 in series, except for the waist section 7 of the micro-nano fiber, the micro-nano fiber The sum L-L1 of the lengths of the tapered transition zone 9, the pigtail 8 of the micro-nano fiber, the gain fiber 3 and all the device pigtails is 3.9 m, that is, L1:(L-L1) is 1:3.9. The spectral filter has a center wavelength of 2200 nm and a bandwidth of 60 nm. Depend on Figure 4 It can be seen that the output spectrum of the laser in this embodiment is relatively broad, 60 nm, and the spectrum is flat.

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Abstract

The invention discloses a dissipative soliton laser in 2 micron wave band, including pumping sources, wavelength division multiplexer, isolator, spectral filter, gain fiber, optical fiber polarizationcontroller, fiber polarization beam splitter and micro-nano fiber, the wavelength division multiplexer, isolator, spectral filter, gain fiber, optical fiber polarization controller, A lase resonant cavity is formed by connecte that optical fiber polarization beam splitter and the micro-nano optical fib in series, wherein the micro-nano optical fiber in the loop is more than one section, the diameter of the waist section of at least one section of the micro-nano optical fiber is 800 nm to 1600 nm, the length is 5 mm to 1 m, and the length of the waist section of the at least one section of themicro-nano optical fiber satisfies L1: (L-L1) = 1: 3.5 to 50. Where L1 denotes the length of the waist portion of the micro-nano optical fiber and L denotes the sum of the lengths of all the opticalfibers in the loop. The output spectrum of the invention has a wide spectrum of tens of nanometers and a flat spectrum, and solves the technical problem that the prior art has not solved for a long time.

Description

technical field [0001] The invention relates to a dissipative soliton laser in the 2-micron band, belonging to the technical field of lasers. Background technique [0002] The application of lasers in the 2 micron band in the fields of material processing, laser medical treatment, eye-safe lidar and remote sensing, and spectral detection of atoms and molecules has attracted great attention from researchers. Fiber lasers operating in the dissipative soliton region can obtain ultrashort pulses with high pulse energy and narrow pulse width. However, dissipative soliton lasing can only be formed when the total dispersion of the resonator is positive, which is not easy to achieve in the 2 micron band. In recent years, there have been a series of reports on dissipative soliton lasers in the 2-micron band. These works focus on how to effectively compensate the negative second-order dispersion in the 2-micron band in the resonator, including the use of telescope systems based on gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/083
CPCH01S3/06708H01S3/06712H01S3/06791H01S3/083
Inventor 李宇航童利民王利镇康仪郭欣
Owner ZHEJIANG UNIV
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