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Two-micron-waveband low-threshold-value thulium-doped optical filer laser device for joint pumping of fiber core and cladding

A fiber laser and low-threshold technology, applied in the laser field, can solve the problem of high laser threshold of thulium-doped fiber lasers, and achieve the effects of suppressing degradation, high absorption efficiency, and low laser threshold

Inactive Publication Date: 2016-04-20
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the high laser threshold of the thulium-doped fiber laser pumped by the 790nm cladding pumped by the signal light wavelength in the 2μm band, especially less than 1.9μm

Method used

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  • Two-micron-waveband low-threshold-value thulium-doped optical filer laser device for joint pumping of fiber core and cladding
  • Two-micron-waveband low-threshold-value thulium-doped optical filer laser device for joint pumping of fiber core and cladding
  • Two-micron-waveband low-threshold-value thulium-doped optical filer laser device for joint pumping of fiber core and cladding

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Embodiment 1

[0025] Embodiments of the present invention when the resonant cavity 3 is a linear cavity structure are as follows figure 1 As shown, the present invention is composed of a pumping source 1 , a gain medium 2 and a resonant cavity 3 . The pumping source 1 is connected to the resonant cavity 3 , and the gain medium 2 is located in the resonant cavity 3 .

[0026] The pumping source 1 is composed of a 790nm band multi-mode pumping source 11 , a 1.5 μm band single-mode pumping source 12 and a pumping-signal combiner 13 . The 790nm band multi-mode pumping source 11 is connected to the pumping end of the pump-signal combiner 13; the 1.5μm band single-mode pumping source 12 is connected to the signal end of the pump-signal combiner 13; the pumping-signal combiner The output terminal of the device 13 is connected to the resonant cavity 3. The 790nm band multimode pumping source 11 is a 790nm band multimode laser diode, and the output pigtail is a multimode optical fiber. The 1.5 μm ...

Embodiment 2

[0032] Embodiments of the present invention when the resonant cavity 3 is an annular cavity structure are as follows Figure 4 As shown, the present invention is composed of a pumping source 1 , a gain medium 2 and a resonant cavity 3 . The pumping source 1 is connected to the resonant cavity 3 , and the gain medium 2 is located in the resonant cavity 3 .

[0033] The pumping source 1 is composed of a 790nm band multi-mode pumping source 11 , a 1.5 μm band single-mode pumping source 12 , a pumping-signal combiner 13 and a wavelength division multiplexer 14 . The 790nm band multi-mode pumping source 11 is connected to the pumping end of the pump-signal combiner 13; the 1.5 μm band single-mode pumping source 12 is connected to the first input end of the wavelength division multiplexer 14; the wavelength division multiplexer 14 The second input terminal of the second input terminal is connected to the resonant cavity 3; the output terminal of the wavelength division multiplexer ...

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Abstract

The invention discloses a two-micron-waveband low-threshold-value thulium-doped optical filer laser device for joint pumping of a fiber core and cladding and aims at solving the problem that an optical filer laser with the signal optical wavelength within the two-micron waveband is high in threshold value. The laser device is constituted by a pumping source, a gain medium and a resonant cavity, the pumping source is connected with the resonant cavity, the gain medium is located in the resonant cavity, and the resonant cavity is of a linear cavity structure or an annular cavity structure. If the resonant cavity is of the linear cavity structure, the pumping source is composed of a 790nm-waveband multimode pumping source body, a 1.5micron-waveband single-mode pumping source body and a pumping-signal beam bundler, and the resonant cavity is composed of two reflection-type optical fiber bragg gratings; if the resonant cavity is of the annular cavity structure, compared with the situation that the resonant cavity is of the linear cavity structure, the pumping source has one more wavelength division multiplexer, and the resonant cavity is composed of an optical fiber coupler, an optical fiber circulator and a reflection-type optical fiber bragg grating; the gain medium is thulium-doped double-clad optical fibers or thulium-and-holmium-doped double-clad optical fibers. By means of the two-micron-waveband low-threshold-value thulium-doped optical filer laser device, the laser threshold value of the two-micron-waveband optical filer laser device can be lowered, and generation of ASE is effectively inhibited.

Description

technical field [0001] The invention discloses a core-cladding co-pumped 2 μm band low-threshold thulium-doped fiber laser, which belongs to the field of laser technology. Background technique [0002] The 2μm-band fiber laser with thulium-doped fiber as the gain medium is used in lidar, remote detection, biomedicine, and as a pumping source for Ho:YAG (holmium-doped yttrium aluminum garnet) solid-state lasers and optical parametric oscillators to realize mid-infrared band lasers Output and other aspects have important application value and broad application prospects. Moreover, all the devices used are currently commercial optical fiber devices, the system is easy to be fully optical fiber, the structure is simple, and the stability is high. [0003] Thulium ion (Tm 3+ ) has multiple absorption peaks, so thulium-doped fiber lasers have multiple options for pumping wavelengths. The usual pumping wavelengths are located in the 790nm band, 1.06μm band and 1.5μm band, and esp...

Claims

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Application Information

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IPC IPC(8): H01S3/067
CPCH01S3/06716H01S3/06733H01S3/0675
Inventor 杨林永张斌侯静陈胜平陈子伦李志鸿殷科姚金妹刘广琛蔡振
Owner NAT UNIV OF DEFENSE TECH
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