CN202513439U

CN202513439U - Structure capable of increasing repetition frequency of pulse laser

Info

Publication number: CN202513439U
Application number: CN2012201281333U
Authority: CN
Inventors: 吴砺; 贺坤; 魏豪明; 刘国宏; 陈卫民; 凌吉武; 郑保忠
Original assignee: Photop Technologies Inc
Current assignee: Photop Technologies Inc
Priority date: 2012-03-30
Filing date: 2012-03-30
Publication date: 2012-10-31
Anticipated expiration: 2022-03-30

Abstract

The utility model relates to the technical field of laser, and discloses a structure capable of increasing repetition frequency of a pulse laser. The structure comprises a pulse laser group, a coupling lens and an output optical fiber, wherein a wavelength selection element is additionally arranged in a resonant cavity of each pulse laser of the pulse laser group, and a WDM (Wavelength Division Multiplexing) diaphragm is arranged corresponding to an output end of each pulse laser, so that a WDM diaphragm group is formed; and each WDM diaphragm has a total reflection effect on the wavelength of the corresponding pulse laser and has an anti-reflection effect on other wavelengths, and laser beams of different wavelengths output by the pulse laser group are combined by the WDM diaphragm group and then are coupled by the coupling lens to the output optical fiber to be output. The existing high-power laser and frequency device structure are improved, and pulse laser beams of different wavelengths are combined by the WDM diaphragm and are coupled to be output, so that the output frequency of the whole pulse laser is increased by several times or one order, the size is small, the efficiency is high, and the cost is low.

Description

A kind of structure that improves the pulse laser repetition rate

Technical field

The utility model relates to laser technology field, relates in particular to a kind of structure that improves the pulse laser repetition rate.

Background technology

Passive Q-adjusted solid state laser is compared with the active Q-switched laser, has reduced complicated drive circuit, has that volume is little, efficient is high, low cost and other advantages, has development prospect preferably, and has been widely used in key areas such as military affairs.Along with the development of application technologies such as long-range ligh-ranging, optical communication, high speed holographic, the repetition rate of passive Q-regulaitng laser, average power are required to improve constantly.For single passive Q-regulaitng laser, its repetition rate generally at several kHz to tens kHz, its shortcoming is that frequency can not improve.

Summary of the invention

For overcoming the problems referred to above, the utility model proposes a kind of structure that improves the pulse laser repetition rate, can make the pulse laser output frequency improve several times or an one magnitude, and volume is little, efficient is high, cost is low.

For achieving the above object; The technical scheme that the utility model proposed is: a kind of structure that improves the pulse laser repetition rate; Comprise pulse laser group, coupled lens and output optical fibre, all have additional wavelength in each pulse laser resonant cavity of said pulse laser group and select element; Corresponding each pulse laser output is equipped with a WDM diaphragm, constitutes WDM diaphragm group, and each WDM diaphragm is to the total reflection of corresponding pulses laser wavelength, and is anti-reflection to other wavelength; The laser of each wavelength of pulse laser group output is coupled to output optical fibre output by coupled lens behind WDM membrane combination bundle.

Further, said wavelength selection element is the device that etalon, grating or filter plate etc. have the wavelength selection.

Further, said pulse laser is passive Q-adjusted micro-slice laser.

Further, the textural association of two above-mentioned raising pulse laser repetition rates is constituted the structure of a higher output frequency; Wherein, shared coupled lens of above-mentioned two group pulse laser array and output optical fibre also increase a polarization and close the bundle element, are located between pulse laser group and the coupled lens; The two laser of two groups of said pulse laser combined beam outputs is two polarised lights of polarized orthogonal, closes through polarization and is coupled to output optical fibre output by coupled lens after the bundle element closes bundle.

Further, said polarization close the bundle element be PBS or birefringece crystal etc.

The beneficial effect of the utility model: a kind of structure that improves the pulse laser repetition rate of the utility model; To have superpower laser now improves with the frequency device architecture; Utilize one group of WDM diaphragm that the pulse laser of a plurality of different wave lengths is closed bundle coupling output; So that whole pulse laser output frequency improves several times or an one magnitude, and volume is little, efficient is high, cost is low.

Description of drawings

Fig. 1 is the utility model embodiment one structural representation;

Fig. 2 is the utility model embodiment two structural representations.

Description of symbols:

1011,1012 ~ 101n ... Pump laser; 106 ... Coupled lens;

1021,1022 ~ 102n ... The pumping coupled lens; 107 ... Output optical fibre;

1031,1032 ~ 103n ... Resonant cavity;

1041,1042 ~ 104n ... Wavelength is selected element;

1051,1052 ~ 105n ... The WDM diaphragm;

100,200 ... The pulse laser group.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the utility model is further specified.

Be illustrated in figure 1 as the utility model embodiment one; Comprise pulse laser group 100, coupled lens 106 and output optical fibre 107, all have additional wavelength in each pulse laser resonant cavity 1031 of this pulse laser group 100, the 1032 ~ 103n and

select element

1041,1042 ~ 104n; Corresponding each pulse laser output is equipped with a

WDM diaphragm

1051,1052 ~ 105n, constitutes WDM diaphragm group, and each WDM diaphragm is to the total reflection of corresponding pulses laser wavelength, and is anti-reflection to other wavelength; The laser of pulse laser group 100 each wavelength of output is coupled to output optical fibre 107 outputs by coupled lens 106 behind WDM membrane combination bundle.Wherein, Pulse laser can be passive Q-adjusted micro-slice laser, and is as shown in fig. 1, comprises

pump laser

1011,1012 ~ 101n;

Coupled lens

1021,1022 ~ 102n

resonant cavity

1031,1032 ~ 103n; This

resonant cavity

1031,1032 ~ 103n comprise gain medium and passive Q-adjusted crystal, have increased wavelength in the resonant cavity between the two and have selected

element

1041,1042 ~ 104n, the device that has the wavelength selection like etalon, grating or filter plate etc.

As for first pulse laser; Its pump laser 1011; Preferred laser diode (LD) sends pump light in pumping coupled lens 1021 is coupled to resonant cavity 1031, the spectrum laser that generation stimulated radiation of excitation laser gain media and resonance go out to have certain bandwidth; Select element 1041 because increased a wavelength in the chamber, so a certain wavelength X 1 vibration output laser is only arranged in this section bandwidth.In like manner, second pulse laser only exported the laser of single wavelength λ 2 ... N pulse laser only exported the laser of single wavelength λ n.

The laser that is λ 1 for first pulse laser output wavelength is reflected by first WDM diaphragm 1051, and all the other each WDM diaphragm 1052 ~ 105n are all anti-reflection to λ 1; The laser that is λ 2 for second pulse laser output wavelength is reflected by second WDM diaphragm 1052; And it is all anti-reflection from the 3rd diaphragm to λ 2 to n diaphragm; And the like; The laser that n pulse laser output wavelength is λ n is reflected by n WDM diaphragm 105n, and n WDM diaphragm 105n all has anti-reflection effect to λ 1, λ 2 ~ λ n-1.The laser that is λ 1, λ 2 ~ λ n by n WDM diaphragm 105n output wavelength finally is coupled to output optical fibre 107 outputs through coupled lens 106.

The pulse frequency of supposing each pulse laser in this structure is 10kHz; Average power is P; Through each pulse laser pulse is postponed control launch time, for example make second to launch successively in the time in the pulse distance of first pulse laser, and the pulse distance of each pulse laser is all more than or equal to each pulse laser pulse duration sum to the pulse of n pulse laser; Then can realize the pulse frequency of 10k * nHz, its average power also can reach P * n.

Be illustrated in figure 2 as the utility model embodiment two; With two above-mentioned pulse laser groups 100,200 (being the part that does not comprise coupled lens 106 and output optical fibre 107 in embodiment one structure) combination and a shared coupled lens 106 and output optical fibre 107; Also increase a polarization and close bundle element 300, be located between pulse laser group 100,200 and the coupled lens 106; The two laser that two group pulse laser array 100,200 are closed bundle output is two polarised lights of polarized orthogonal, after polarization closes bundle element 300 to close bundle, is coupled to output optical fibre 107 outputs by coupled lens 106.Wherein, polarization closes bundle element 300 and is PBS or birefringece crystal etc.For example, closing the bundle output pulse frequency when two pulse laser groups 100,200 all be 10k * nHz, and during polarized orthogonal, two polarised lights close bundle element 300 through polarization and close bundle, can realize that the pulse frequency of 10k * n * 2Hz is exported.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; In form with details on various variations that the utility model is made, be the protection range of the utility model.

Claims

1. a structure that improves the pulse laser repetition rate comprises pulse laser group, coupled lens and output optical fibre, it is characterized in that: all have additional wavelength in each pulse laser resonant cavity of said pulse laser group and select element; Corresponding each pulse laser output is equipped with a WDM diaphragm, constitutes WDM diaphragm group, and each WDM diaphragm is to the total reflection of corresponding pulses laser wavelength, and is anti-reflection to other wavelength; The laser of each wavelength of pulse laser group output is coupled to output optical fibre output by coupled lens behind WDM membrane combination bundle.

2. a kind of according to claim 1 structure that improves the pulse laser repetition rate is characterized in that: it is etalon, grating or filter plate that said wavelength is selected element.

3. a kind of according to claim 1 structure that improves the pulse laser repetition rate is characterized in that: said pulse laser is passive Q-adjusted micro-slice laser.

4. structure that improves the pulse laser repetition rate; It is characterized in that: comprise two groups of structures like each described raising pulse laser repetition rate of claim 1-3; Shared coupled lens of said two group pulse laser array and output optical fibre; Also increase a polarization and close the bundle element, be located between pulse laser group and the coupled lens; The two laser of two groups of said pulse laser combined beam outputs is two polarised lights of polarized orthogonal, closes through polarization and is coupled to output optical fibre output by coupled lens after the bundle element closes bundle.

5. like the said a kind of structure that improves the pulse laser repetition rate of claim 4, it is characterized in that: it is PBS or birefringece crystal that said polarization closes the bundle element.