CN101521349A - White light quantum dot fibre laser - Google Patents

White light quantum dot fibre laser Download PDF

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Publication number
CN101521349A
CN101521349A CN200910097188A CN200910097188A CN101521349A CN 101521349 A CN101521349 A CN 101521349A CN 200910097188 A CN200910097188 A CN 200910097188A CN 200910097188 A CN200910097188 A CN 200910097188A CN 101521349 A CN101521349 A CN 101521349A
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quantum dot
laser
fiber
white light
optical fiber
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沈常宇
王志毅
金尚忠
周俊
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China Jiliang University
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China Jiliang University
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Abstract

本发明涉及一种白光量子点光纤激光器,它包括:第一光纤光栅(1)、半导体蓝光激光器(2)、波分复用器(3)、量子点掺杂光纤(4)、第二光纤光栅(5)和激光输出端(6)。波分复用器的信号输入端接第一光纤光栅1,泵浦输入端接半导体蓝光激光器,输出端接量子点掺杂光纤,量子点掺杂光纤再接第二光纤光栅5的反射端,透射端为激光输出端。由于不同尺寸量子点受蓝光激发时激发光出现不同程度的红移,在玻璃光纤中将不同尺寸量子点按一定比例掺杂,可实现白光输出。本发明结构简单、易于制造、能够实现白光激光输出,可广泛用于光纤技术的各个领域。

Figure 200910097188

The invention relates to a white light quantum dot fiber laser, which comprises: a first optical fiber grating (1), a semiconductor blue light laser (2), a wavelength division multiplexer (3), a quantum dot doped optical fiber (4), a second optical fiber Grating (5) and laser output terminal (6). The signal input terminal of the wavelength division multiplexer is connected to the first fiber grating 1, the pump input terminal is connected to the semiconductor blue light laser, the output terminal is connected to the quantum dot-doped optical fiber, and the quantum dot-doped optical fiber is connected to the reflection end of the second optical fiber grating 5, The transmission end is the laser output end. Because quantum dots of different sizes are excited by blue light, the excitation light will be red-shifted to different degrees, and quantum dots of different sizes are doped in a certain proportion in the glass optical fiber to achieve white light output. The invention has simple structure, is easy to manufacture, can realize white light laser output, and can be widely used in various fields of optical fiber technology.

Figure 200910097188

Description

A kind of white light quantum dot fibre laser
Technical field
The present invention relates to a kind of white light quantum dot fibre laser, belong to the fiber laser field, relate in particular to the quantum dot fibre laser field.
Background technology
The general device of the laser of emission white light is comparatively complicated, white light laser need adopt neodymium doped yttrium aluminium garnet laser acquisition 1064nm pulses such as acousto-optic Q modulation, the pump parametric oscillator obtains wavelength 1535nm laser then, by 1064nm and 1535nm laser are carried out and frequently obtain the output of 628nm laser, by 628nm and 1535nm laser are obtained 446nm laser with frequency, by the 1064nm frequency multiplication being obtained 532nm laser, final synthesize white light output.The microstructured optical fibers white light laser generator that proposes as people such as Wang Qingyue needs self-starting mode-locked laser, microstructured optical fibers and a plurality of coupled lens etc. in addition; Wish that the white light laser that generation rather waits the people to propose need adopt the optical superlattice of different structure cascade to produce accurate white light output as nonlinear crystal, complex structure and the ratio that need strictly regulate temperature control RGB light.
White light laser has purposes very widely at aspects such as optical communication, laser spectroscopy, laser biology, optics " light pincers " and illumination amusements continuously, has also established foundation stone for optical information systematic research of future generation simultaneously.
Because the discrete characteristic of energy level of quantum dot and the quantum confinement benefit and the small-size effect of quantum dot, its emission peak can carry out tuning according to the quantum dot size, and this advantage is to make it become the effective means that produces the continuous spectrum white light.Quantum dot is a kind of potential nanoscale semiconductor, has the wide absorption spectrum and the emission spectrum of broad, and can come tuning peak luminous wavelength by its size; Quantum dot has significant technological advantage, compares with traditional generation red, green, blue look fluorescent material, and quantum dot making temperature is lower, and Production Time is also shorter, particularly by tuning quantum dot size, can control its emission wavelength.
Advance optical fiber with different size is quantum dot-doped, excite the different size quantum dot, produce multiple coloured light, constitute reflection cavity by fiber grating by the semiconductor blue laser; The quantum dot fibre laser of realization white light output has simple in structure, is easy to make, can realizes characteristics such as white light laser output, can be widely used in the every field of optical fiber technology.
Summary of the invention
The object of the present invention is to provide a kind of white light quanta point laser.This laser not only can produce broadband, super smooth white light laser, and has characteristics such as simple in structure, that running is stable.
The present invention is achieved through the following technical solutions: comprise first fiber grating, semiconductor blue laser, wavelength division multiplexer, quantum dot-doped optical fiber, second fiber grating and laser output.The signal input part of wavelength division multiplexer connects first fiber grating, pumping input termination semiconductor blue laser, and the quantum dot-doped optical fiber of output termination, quantum dot-doped optical fiber connects the reflection end of second fiber grating again, and the transmission end is a laser output.
Operation principle of the present invention is: the blue light that the semiconductor blue laser sends incides as gain media and the quanta point optical fiber of mixing that produces the multiple coloured light in visible range (red, yellow, green, blue etc.) by wavelength division multiplexer as pump light.The light of different peak wavelengths can take place when blue-light excited in the different size quantum dot, the quantum dot of these different sizes is mixed in the glass optical fiber by a certain percentage, just the visible light of these peak wavelengths can be produced, just continuous, smooth white light can be obtained after the mixing; Through the reflection of two fiber gratings and repeatedly gain, can obtain continuous, super smooth white light laser at laser output.
Description of drawings
Fig. 1 is the schematic diagram of a kind of white light quantum dot fibre laser of the present invention;
The spectrogram of Fig. 2 different size quantum dot when blue-light excited;
Embodiment
With reference to Fig. 1, the device of white light quantum dot fibre laser of the present invention comprises first fiber grating 1, semiconductor blue laser 2, wavelength division multiplexer 3, quantum dot-doped optical fiber 4, second fiber grating 5 and laser output 6.The signal input part of wavelength division multiplexer connects first fiber grating, pumping input termination semiconductor blue laser, and the quantum dot-doped optical fiber of output termination, quantum dot-doped optical fiber connects the reflection end of second fiber grating again, and the transmission end is a laser output.Quantum dot in the wherein quantum dot-doped optical fiber can adopt the CdSe/ZnSe of nucleocapsid structure or the quantum dot of CdSe/ZnS or CdSe/CdS or CdS/ZnS or CdS/HgS.The size of quantum dot is 2nm~6nm scope.First fiber grating is that the resonance wavelength that satisfies of a series of (at least three) is positioned at the broadband Bragg reflector that red, green, blue typical wavelengths Fiber Bragg Grating FBG constitutes, and second fiber grating adopts the chirped fiber grating of a series of (at least three).Fig. 2 describes is that the CdSe/ZnSe quantum dot of different size nucleocapsid structure is subjected to the photoluminescence spectra figure when blue-light excited.As can be seen from the figure, as when blue-light excited, the CdSe/ZnSe quantum dot of nucleocapsid structure size be 2.2,2.7,3.2,3.4,3.7,3.8,4.0 and during 4.8nm respectively emission peak wavelength lay respectively at 510,540,555,580,585,590,595 and 620nm.Therefore, in this example size is respectively that three kinds of nucleocapsid structure CdSe/ZnSe of 2.2nm~3nm and 4nm~5nm and 4nm~5nm scope are quantum dot-doped to advance silica fiber, obtain blue light, green glow and ruddiness, obtain white light after three kinds of coloured light mix, output white light laser behind the feedback oscillator.

Claims (4)

1.一种白光量子点光纤激光器,它包括:第一光纤光栅(1)、半导体蓝光激光器(2)、波分复用器(3)、量子点掺杂光纤(4)、第二光纤光栅(5)和激光输出端(6)。波分复用器的信号输入端接第一光纤光栅,泵浦输入端接半导体蓝光激光器,输出端接量子点掺杂光纤,量子点掺杂光纤再接第二光纤光栅的反射端,透射端为激光输出端。1. A white light quantum dot fiber laser, comprising: the first fiber grating (1), semiconductor blue light laser (2), wavelength division multiplexer (3), quantum dot doped fiber (4), the second fiber grating (5) and the laser output terminal (6). The signal input terminal of the wavelength division multiplexer is connected to the first fiber grating, the pump input terminal is connected to the semiconductor blue light laser, the output terminal is connected to the quantum dot doped fiber, and the quantum dot doped fiber is connected to the reflection end and transmission end of the second fiber grating for the laser output. 2.根据权利要求1所述的一种白光量子点光纤激光器,其特征在于:掺杂进光纤的量子点为核-壳结构的CdSe/ZnSe或CdSe/ZnS或CdSe/CdS或CdS/ZnS或CdS/HgS的量子点。量子点的大小为2nm~6nm范围。2. A kind of white light quantum dot fiber laser according to claim 1, characterized in that: the quantum dots doped into the fiber are CdSe/ZnSe or CdSe/ZnS or CdSe/CdS or CdS/ZnS or Quantum dots of CdS/HgS. The size of the quantum dots ranges from 2nm to 6nm. 3.根据权利要求1所述的一种白光量子点光纤激光器,其特征在于:使用光纤光栅作为反射腔镜,结合腔内蓝光激发多种尺寸量子点发射多种颜色光并混合成白光,多次反馈之后形成白光激光输出。3. A white light quantum dot fiber laser according to claim 1, characterized in that: fiber grating is used as a reflective cavity mirror, combined with blue light in the cavity to excite quantum dots of various sizes to emit multiple colors of light and mix them into white light, multiple White light laser output is formed after the second feedback. 4.根据权利要求1所述的一种白光量子点光纤激光器,其特征在于:所述的第一光纤光栅是一系列(至少三个)的满足谐振波长位于红、绿、蓝典型波长光纤布拉格光栅构成的宽带布拉格反射器,第二光纤光栅采用一系列(至少三个)的啁啾光纤光栅。4. A kind of white light quantum dot fiber laser according to claim 1, characterized in that: said first fiber grating is a series (at least three) that satisfy the resonant wavelength to be located in the typical wavelength of red, green and blue fiber Bragg The broadband Bragg reflector formed by the grating, the second fiber grating adopts a series (at least three) of chirped fiber gratings.
CN200910097188A 2009-03-26 2009-03-26 White light quantum dot fibre laser Pending CN101521349A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107147003A (en) * 2017-05-27 2017-09-08 杭州电子科技大学 Mode-locked fiber laser with lead selenide quantum dots as gain medium
CN109167254A (en) * 2018-10-15 2019-01-08 南京邮电大学 Include silver selenide/selenizing silver-colored zinc core-shell quanta dots vertical cavity surface emitting laser and preparation method thereof
CN110702264A (en) * 2019-10-31 2020-01-17 浙江光塔节能科技有限公司 Detection system for quantum dot optical fiber illumination
CN111129929A (en) * 2020-01-09 2020-05-08 浙江大学 Multi-wavelength fiber laser based on multi-granularity quantum dot doping and design method thereof
WO2020237984A1 (en) * 2019-05-29 2020-12-03 深圳市星汉激光科技有限公司 White light laser source

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107147003A (en) * 2017-05-27 2017-09-08 杭州电子科技大学 Mode-locked fiber laser with lead selenide quantum dots as gain medium
CN109167254A (en) * 2018-10-15 2019-01-08 南京邮电大学 Include silver selenide/selenizing silver-colored zinc core-shell quanta dots vertical cavity surface emitting laser and preparation method thereof
WO2020237984A1 (en) * 2019-05-29 2020-12-03 深圳市星汉激光科技有限公司 White light laser source
CN110702264A (en) * 2019-10-31 2020-01-17 浙江光塔节能科技有限公司 Detection system for quantum dot optical fiber illumination
CN110702264B (en) * 2019-10-31 2024-09-17 浙江光塔安全科技有限公司 Detection system for quantum dot optical fiber illumination
CN111129929A (en) * 2020-01-09 2020-05-08 浙江大学 Multi-wavelength fiber laser based on multi-granularity quantum dot doping and design method thereof

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