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Near-infrared erbium-doped fiber laser

An erbium-doped fiber and near-infrared technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of insufficient pulse width and insufficient pulse power, and achieve the effect of preventing damage to optical devices and high energy.

Active Publication Date: 2021-11-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the traditional system that the pulse power is not high enough and the pulse width is not small enough, the present invention provides a near-infrared erbium-doped fiber laser, which realizes the power amplification of the pulse through the fiber amplifier module, and obtains the ultrashort pulse through the spectrum shaping module. The spectrum shifting module obtains near-infrared pulses to obtain high-power ultra-short near-infrared pulses

Method used

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Embodiment 1

[0026] Embodiment 1 Overall structure of the present invention

[0027] Such as figure 1 Shown, the overall structure of the present invention has, pumping source 1 (the LC962U type pumping source of OCLARO Company, central wavelength 980nm, the maximum single-mode output optical power is 750mW) and wavelength division multiplexer 2 (COMCORE Company 980 / 1060nm The 980nm end of the single-mode fiber wavelength division multiplexer) is connected, and the 1550nm end of the wavelength division multiplexer 2 is connected to the optical coupler 3 (the model produced by OZ-OPTICS is FUSED-12-1060-7 / 125-50 / 50 -3U-3mm optical fiber coupler) is connected to the input end, and the output end of optical coupler 3 is connected to one end of saturable absorber 4 (German BATOP company SA-1064-25-2ps-FC / PC saturable absorber) , the other end of the saturable absorber 4 is connected to the input end of the polarization sensitive isolator 5 (Conoptics company 714 polarization sensitive isolato...

Embodiment 2

[0029] Embodiment 2 Feedback Loop

[0030] The structure of the feedback loop 9 is that the input end of the photodetector 901 (Thorlabs company RX25BF photodetector) is used as the input end of the feedback loop 9, and is connected with the described optical fiber polarization beam splitter 7, and the input end of the photodetector 901 The output end is connected to the input end of amplifier 902 (SOA-1080-20-HI-40dB amplifier of Innolume Company), and one output end of amplifier 902 passes through filter 903 (CW4L2 filter of YUNSANDA Company), A / D converter 904 and MCU906 (STMicroelectronics company STM32MP157FAC1MCU) is connected to one input, and the other output of the amplifier 902 is connected to the other input of the MCU906 through a frequency divider 905 (Texas Instruments company MPY634 frequency divider), and the MCU906 is used as the output of the feedback loop 9, One output end is connected to the other input end of the electronically controlled polarization cont...

Embodiment 3

[0031] Embodiment 3 pretreatment module

[0032] Described pretreatment module 11 has following optical path structure, and light pulse passes through pretreatment bandpass filter 1101 (santec company OFM-15 bandpass filter), pretreatment coupler 1102 (the model that OZ-OPTICS company produces is FUSED -12-1060-7 / 125-50 / 50-3U-3mm fiber coupler), the first pre-processing isolator 1103 (Hengyang Optical Company HOI-005-532 isolator), incident to the optical combiner 1104 (Microphotons company LCMFC-2x1 optical combiner), the pumping light that the first pretreatment photodiode 1105 (DILAS company D4F2P22-976) produces is incident on the optical combiner 1104, and the light that is incident to the optical combiner 1104 before Pulse fusion, the fused optical pulse passes through the first pre-processing erbium-doped fiber 1106 (EDF13 / 6 / 125-23 erbium-doping fiber of Changfei Company), the second pre-processing isolator 1107 (Hengyang Optical Company HOI-005-532 Isolator), the firs...

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Abstract

The invention discloses a near-infrared erbium-doped fiber laser, and belongs to the technical field of optoelectronic equipment. The laser structurally comprises a pumping source (1), a wavelength division multiplexer (2), an optical coupler (3), a saturable absorber (4), a polarization sensitive isolator (5), an electric control polarization controller (6), an optical fiber polarization beam splitter (7), an erbium-doped optical fiber (8), a feedback loop (9), a collimator (10), a preprocessing module (11), a spectrum shaping module (12), an optical fiber amplification module (13), a spectrum moving module (14) and the like. The optical pulse is compressed in the spectrum moving module, the pulse width is effectively compressed, the central wavelength of the spectrum is moved at the same time, the near-infrared pulse is obtained, and the optical pulse can obtain higher energy under the condition of limited pumping power.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic equipment, in particular to a near-infrared erbium-doped fiber laser. Background technique [0002] With the continuous development of optical laser technology, near-infrared fiber lasers have been widely used in different fields. In the field of laser detection, compared with the traditional radar, the laser radar has the advantages of small size and light weight due to the small size and light weight of the near-infrared fiber laser. It has the characteristics of strong source interference ability and good low-altitude detection performance. In the field of photonic imaging, since the absorption of near-infrared wavelengths by hemoglobin, fat and water is kept at a relatively low level, biological tissues have a "near-infrared window" in the near-infrared band. The near-infrared laser therefore has a high penetration depth, which is beneficial to the optical imaging of the living body, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/094H01S3/117H01S3/13
CPCH01S3/117H01S3/1305H01S3/06754H01S3/094076
Inventor 汝玉星李莹莹陈炳焜韩颖吴戈高博刘列
Owner JILIN UNIV