CN202142767U - Exocoel type electric light tunable laser - Google Patents
Exocoel type electric light tunable laser Download PDFInfo
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- CN202142767U CN202142767U CN201120248213U CN201120248213U CN202142767U CN 202142767 U CN202142767 U CN 202142767U CN 201120248213 U CN201120248213 U CN 201120248213U CN 201120248213 U CN201120248213 U CN 201120248213U CN 202142767 U CN202142767 U CN 202142767U
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Abstract
An exocoel type electric light tunable laser provided in the utility model employs an electric light tunable filter, which is a liquid crystal Fabry-Perot cavity with the cavity length very short, the filter is guaranteed that only one mode fixing the Fabry-Perot cavity is selected in a period interval, a broadband membrane filters the periodical multiple peaks generated in fixing the Fabry-Perot cavity, and only reflects the wavelength of one peak to an optical resonator, thereby one peak of the optical resonator longitudinal mode is adjusted to the main peak of electric light tunable filter through the electric light tunable phase compensator, laser can be output in a single mode, and the output stability and reliability of laser can be enhanced.
Description
Technical field
The utility model relates to optical instrument and technical field of optical fiber communication, specifically designs the adjustable laser of a kind of external cavity type electric light.
Background technology
In the optical communication epoch; Laser is as the transmitting carrier of digital signal.; Each light frequency of laser is corresponding each channel of communication; Can hold a plurality of communication channels in each root optical fiber, the laser carrier of a plurality of frequencies just, and the frequency of laser need be with the variation of the flow of network dynamic the change.The interval of international communication standard code C-Band every 50Ghz from 1530nm to 1570nm covers 100 channels; Tunable laser as communication light source; Existing utility model comprises the long light frequency that changes laser that changes in chamber that makes DFB through heating, and the frequency adjustment of this utility model tunable laser is for up to more than several seconds; The utility model that has is in laser cavity, to add grating to utilize the angle of this change grating of electrical micro-machine to select the frequency of exporting, and the problem of this utility model is vibrations very the sensitivity of laser to environment, poor reliability; The utility model that also has is in laser cavity, to add the light frequency that acousto-optical device changes laser, and the problem of this utility model is the bad stability that the heat of sound wave generation makes laser.
The utility model content
The utility model purpose is to provide a kind of external cavity type electrooptically tuned laser; It utilizes the electro optic effect of liquid crystal and the output frequency that the relevant formation of multiple beam narrow band filter is regulated and control laser; Owing to be with the little Current Control of alternating voltage; Therefore can respond fast, not have thermal effect, in adjustment process, have no machinery to move, so the vibrations of surrounding environment are minimum to the equipment influence.
In order to solve these problems of the prior art, the technical scheme that the utility model provides is:
A kind of external cavity type electrooptically tuned laser; It comprises collimating lens, be located at gain of light medium between collimating lens, be located at the adjustable liquid crystal phase compensator of electric light tunable filter, electric light, the high reflection mirror of collimating lens rear end; Also comprise a broadband film and fixation Fabry-Perot-type cavity in the described laser; Described fixation Fabry-Perot-type cavity is located at the front end of described electric light tunable filter; Described high reflection mirror is located at the rear end of the adjustable liquid crystal phase compensator of described electric light; Described broadband film can be located at the front end of electric light tunable filter or adjustable liquid crystal phase compensator of electric light or high reflection mirror thrin; The bandwidth of described broadband film mould is less than the period of described electric light tunable filter, and the bandwidth of described electric light tunable filter (3dB) is less than the period of described fixation Fabry-Perot-type cavity mould.
Detailed technical scheme is: a kind of external cavity type electrooptically tuned laser; It comprises collimating lens, be located at gain of light medium between collimating lens, be located at the adjustable liquid crystal phase compensator of electric light tunable filter, electric light, the high reflection mirror of collimating lens rear end; Also comprise a broadband film and fixation Fabry-Perot-type cavity in the described laser; Described fixation Fabry-Perot-type cavity is located at the front end of described electric light tunable filter; Described high reflection mirror is located at the rear end of the adjustable liquid crystal phase compensator of described electric light; Described broadband film can be located at the front end of electric light tunable filter or adjustable liquid crystal phase compensator of electric light or high reflection mirror thrin; The bandwidth of described broadband film mould is less than the period of described electric light tunable filter, and the bandwidth of described electric light tunable filter (3dB) is less than the period of described fixation Fabry-Perot-type cavity mould, and described electric light tunable filter is the liquid crystal Method Fabry-Perot-type cavity; The chamber length of described liquid crystal Method Fabry-Perot-type cavity is smaller or equal to 15 microns; The reflectivity of two optical surfaces of described liquid crystal Method Fabry-Perot-type cavity is 92% ~ 94%, and the electrode surface of described liquid crystal Method Fabry-Perot-type cavity is arranged in the outermost layer of the high inverse medium film of Fabry-Perot-type cavity, and the difference of the birefringence of the liquid crystal in the described liquid crystal Method Fabry-Perot-type cavity is greater than 0.2; The thickness of liquid crystal of described electric light is adjustable liquid crystal phase compensator is smaller or equal to 15 microns; The difference of the birefringence of the liquid crystal of described electric light is adjustable liquid crystal phase compensator is greater than 0.2, and the broadband of described high reflection mirror is greater than 40 nanometers, the reflectivity of described high reflection mirror in the broadband greater than 99.9%.
When described broadband film was located at the front end of electric light tunable filter or is located at the front end of the adjustable liquid crystal phase compensator of electric light, the broadband film that is adopted was the broadband light-transmissive film; When affiliated broadband film was located at the high reflection mirror front end, the broadband film that is adopted was the broadband reflection film.
For technique scheme, we can also optimize further, and the front end face of described gain of light medium and broadband high reflective mirror form optical cavity, and the light transmittance of the logical light face of all optics in the described optical cavity is greater than 99%.
Further, the electrooptic modulation frequency of described liquid crystal Method Fabry-Perot-type cavity is 5 ~ 100 KHzs, and the electrooptic modulation frequency of described electric light is adjustable liquid crystal phase compensator is 5 ~ 100 KHzs, and both electrooptic modulation amplitudes are 0 ~ 15 volt.
Further, the phase adjustment range of the adjustable liquid crystal phase compensator of described electric light is greater than the one-period of laser chamber film.
With respect to scheme of the prior art, the utility model has the advantages that:
1.The electric light tunable filter that the external cavity type electrooptically tuned laser that the utility model provided is adopted is the long extremely short liquid crystal Method Fabry-Perot-type cavity in chamber and guarantees that this filter has only the mould of a fixation Fabry-Perot-type cavity selected at one-period at interval; The broadband film then filters the periodicity multimodal that fixation lining-Perot cavity produced and the wavelength light echo that only reflects a peak learned resonant cavity; Like this at the main peak that can a peak of optical cavity longitudinal mode be adjusted to the electric light tunable filter through the adjustable liquid crystal phase compensator of electric light; Can guarantee that so laser becomes single mode output, improves the output stability and the reliability of laser;
2.In the external cavity type electrooptically tuned laser that the utility model provided; Filter, phase compensator are all regulated the output light frequency of laser through the electro optic effect of liquid crystal; Owing to be to adopt alternating voltage, little Current Control; Thereby can respond fast in delicate and do not have thermal effect 10, this structure also reduces its vibration influence of receiving external environment condition greatly, has improved the job stability of laser.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of the described gain media of the utility model;
Fig. 3 is the structural representation of the described electric light tunable filter of the utility model;
Fig. 4 is the structural representation of the adjustable liquid crystal phase compensator of the described electric light of the utility model;
Fig. 5 is the chamber film of the fixation Fabry-Perot-type cavity described in the present embodiment;
Fig. 6 is the chamber film of the laser described in the present embodiment;
Fig. 7 is the spectrogram of broadband high reflection mirror in the present embodiment;
Fig. 8 is the spectrogram of electric light tunable filter in the present embodiment;
Wherein: 10, collimating lens; 20, gain of light medium; 21, gain of light medium front end; 22, gain of light medium rear end; 30, collimating lens; 40, fixation Fabry-Perot-type cavity; 50, liquid crystal Method Fabry-Perot-type cavity; 51, electrode; 52, electrode; 53, liquid crystal; 60, the adjustable liquid crystal phase compensator of electric light; 61, electrode; 62, electrode; 63, liquid crystal; 70, broadband high reflection mirror.
Embodiment
Below in conjunction with specific embodiment such scheme is further specified.Should be understood that these embodiment are used to the utility model is described and the scope that is not limited to limit the utility model.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment:
As shown in Figure 1; External cavity type electrooptically tuned laser described in the present embodiment is the laser that a broadband film is located at high reflection mirror 70 front ends; It comprises collimating lens 10 and collimating lens 30, be located at gain of light medium 20 between two collimating lenses, be located at the adjustable liquid crystal phase compensator 60 of electric light tunable filter, electric light and the high reflection mirror 70 of collimating lens 30 rear ends; Also comprise a broadband film and fixation Fabry-Perot-type cavity 40 in the described laser; Described fixation Fabry-Perot-type cavity is located at the front end of described electric light tunable filter; Described high reflection mirror 70 is located at the rear end of the adjustable liquid crystal phase compensator 60 of described electric light; The bandwidth of described broadband film mould is less than the period of described electric light tunable filter, and the bandwidth of described electric light tunable filter is less than the period of described fixation Fabry-Perot-type cavity 40 moulds.
In the present embodiment, as shown in Figure 2, the transmissivity of gain of light medium 20 rear and front ends is different, and the reflectivity of gain of light medium front end 21 is 10%, and 99% anti-reflection film is posted in 22 of gain of light medium rear ends.
Described electric light tunable filter is a liquid crystal Method Fabry-Perot-type cavity 50; Its structure is as shown in Figure 3; The chamber length of described liquid crystal Method Fabry-Perot-type cavity 50 equals 15 microns; The adjustable liquid crystal 53 of described liquid crystal Method Fabry-Perot-type cavity is located between two optical surfaces, and two ends are connection electrode 51 and electrode 53 respectively, and the reflectivity of two optical surfaces of described liquid crystal Method Fabry-Perot-type cavity 50 is 93%; The electrode surface of described liquid crystal Method Fabry-Perot-type cavity 50 is arranged in the outermost layer of the high inverse medium film of Fabry-Perot-type cavity, and the difference of the birefringence of the liquid crystal in the described liquid crystal Method Fabry-Perot-type cavity 50 is greater than 0.2.
As shown in Figure 4; Liquid crystal 63 thickness of described electric light is adjustable liquid crystal phase compensator 60 equal 15 microns; The difference of the birefringence of the liquid crystal 63 of described electric light is adjustable liquid crystal phase compensator 60 is greater than 0.2; Liquid crystal 63 two ends connection electrode 61 are regulated liquid-crystal refractive-index with electrode 62 with energising, and the phase adjustment range of described electric light is adjustable liquid crystal phase compensator 60 is greater than the one-period of laser chamber film.
And the broadband of described broadband film is greater than 40 nanometers, and the reflectivity of described high reflection mirror is 99%, and the chamber film bandwidth of formed broadband high reflection mirror is the 5.5G hertz, and its cycle is the 13.5G hertz.
The free space cycle of fixation Fabry-Perot-type cavity 40 is the 50G hertz, and accurate parameter (F) is 10, and its bandwidth is the 10G hertz, and it can guarantee the output of laser single mode just less than the chamber film cycle 13.5G hertz of laser like this.
The bandwidth of the liquid crystal Method Fabry-Perot-type cavity 50 in the present embodiment is 75G hertz; Its bandwidth is less than the period of Fabry-Perot-type cavity, and the liquid crystal Method Fabry-Perot-type cavity 50 as the electric light tunable filter has only the mould of a fixation Fabry-Perot-type cavity 40 selected in the one-period interval like this.
Above-mentioned instance only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the people who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection range of the utility model with this.All equivalent transformation or modifications of being done according to the utility model spirit all should be encompassed within the protection range of the utility model.
Claims (10)
1. external cavity type electrooptically tuned laser; It comprises collimating lens, be located at gain of light medium between collimating lens, be located at the adjustable liquid crystal phase compensator of electric light tunable filter, electric light, the high reflection mirror of collimating lens rear end; It is characterized in that; Also comprise a broadband film and fixation Fabry-Perot-type cavity in the described laser; Described fixation Fabry-Perot-type cavity is located at the front end of described electric light tunable filter; Described high reflection mirror is located at the rear end of the adjustable liquid crystal phase compensator of described electric light; Described broadband film can be located at the front end of electric light tunable filter or adjustable liquid crystal phase compensator of electric light or high reflection mirror thrin, and the bandwidth of described broadband film mould is less than the period of described electric light tunable filter, and the bandwidth of described electric light tunable filter is less than the period of described fixation Fabry-Perot-type cavity mould.
2. external cavity type electrooptically tuned laser according to claim 1; It is characterized in that; Described electric light tunable filter is the liquid crystal Method Fabry-Perot-type cavity; The chamber length of described liquid crystal Method Fabry-Perot-type cavity is smaller or equal to 15 microns; The reflectivity of two optical surfaces of described liquid crystal Method Fabry-Perot-type cavity is 92% ~ 94%, and the electrode surface of described liquid crystal Method Fabry-Perot-type cavity is arranged in the outermost layer of the high inverse medium film of Fabry-Perot-type cavity, and the difference of the birefringence of the liquid crystal in the described liquid crystal Method Fabry-Perot-type cavity is greater than 0.2.
3. external cavity type electrooptically tuned laser according to claim 1; It is characterized in that; The thickness of liquid crystal of described electric light is adjustable liquid crystal phase compensator is smaller or equal to 15 microns, and the difference of the birefringence of the liquid crystal of described electric light is adjustable liquid crystal phase compensator is greater than 0.2.
4. external cavity type electrooptically tuned laser according to claim 1 is characterized in that, be located at the adjustable liquid crystal phase compensator of electric light tunable filter or electric light both one of the broadband film of front end be the broadband light-transmissive film.
5. external cavity type electrooptically tuned laser according to claim 1 is characterized in that, the broadband film of being located at the high reflection mirror front end is the broadband reflection film.
6. external cavity type electrooptically tuned laser according to claim 1 is characterized in that, the broadband of described broadband film is greater than 40 nanometers.
7. external cavity type electrooptically tuned laser according to claim 1 is characterized in that, the front end face of described gain of light medium and broadband high reflective mirror form optical cavity, and the light transmittance of the logical light face of all optics in the described optical cavity is greater than 99%.
8. external cavity type electrooptically tuned laser according to claim 2 is characterized in that, the electrooptic modulation frequency of described liquid crystal Method Fabry-Perot-type cavity is 5 ~ 100 KHzs, and the electrooptic modulation amplitude is 0 ~ 15 volt.
9. external cavity type electrooptically tuned laser according to claim 3 is characterized in that, the electrooptic modulation frequency of described electric light is adjustable liquid crystal phase compensator is 5 ~ 100 KHzs, and the electrooptic modulation amplitude is 0 ~ 15 volt.
10. according to claim 1 or 2 or 3 described external cavity type electrooptically tuned lasers, it is characterized in that the phase adjustment range of described electric light is adjustable liquid crystal phase compensator is greater than the one-period of laser chamber film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120248213U CN202142767U (en) | 2011-07-14 | 2011-07-14 | Exocoel type electric light tunable laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120248213U CN202142767U (en) | 2011-07-14 | 2011-07-14 | Exocoel type electric light tunable laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202142767U true CN202142767U (en) | 2012-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120248213U Withdrawn - After Issue CN202142767U (en) | 2011-07-14 | 2011-07-14 | Exocoel type electric light tunable laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202142767U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280809A (en) * | 2011-07-14 | 2011-12-14 | 余模智 | Outer cavity type electrooptically tuned laser device |
| CN103364975A (en) * | 2013-01-17 | 2013-10-23 | 苏州多谱激光科技有限公司 | Combined adjustable filter |
| CN106788764A (en) * | 2017-02-21 | 2017-05-31 | 电子科技大学 | A kind of self feed back signal modulating method towards 5G RoF |
-
2011
- 2011-07-14 CN CN201120248213U patent/CN202142767U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280809A (en) * | 2011-07-14 | 2011-12-14 | 余模智 | Outer cavity type electrooptically tuned laser device |
| CN102280809B (en) * | 2011-07-14 | 2014-07-30 | 苏州多谱激光科技有限公司 | Outer cavity type electrooptically tuned laser device |
| CN103364975A (en) * | 2013-01-17 | 2013-10-23 | 苏州多谱激光科技有限公司 | Combined adjustable filter |
| CN106788764A (en) * | 2017-02-21 | 2017-05-31 | 电子科技大学 | A kind of self feed back signal modulating method towards 5G RoF |
| CN106788764B (en) * | 2017-02-21 | 2019-01-25 | 电子科技大学 | A kind of self feed back signal modulating method towards 5G-RoF |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SUZHOU DUOPU LASER ECHNOLOGY CO., LTD. Free format text: FORMER OWNER: YU MOZHI Effective date: 20130131 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 215128 SUZHOU, JIANGSU PROVINCE TO: 215000 SUZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130131 Address after: 215000, 1355 international science and Technology Park, Jinji Lake Avenue, Suzhou Industrial Park, Suzhou, Jiangsu, two A304 Patentee after: Suzhou Duopu Laser Technology Co., Ltd. Address before: Suzhou Wuzhong District City, Jiangsu province 215128 Guo Xiang Jiang Zhuang Gu Sheng Lu Industrial Zone No. 2 Patentee before: Yu Mozhi |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120208 Effective date of abandoning: 20140730 |
|
| RGAV | Abandon patent right to avoid regrant |