CN106154422A - A kind of isolated optical fiber polarization controller - Google Patents
A kind of isolated optical fiber polarization controller Download PDFInfo
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- CN106154422A CN106154422A CN201510154406.XA CN201510154406A CN106154422A CN 106154422 A CN106154422 A CN 106154422A CN 201510154406 A CN201510154406 A CN 201510154406A CN 106154422 A CN106154422 A CN 106154422A
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- optical fiber
- collimator
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- light
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Abstract
The invention discloses a kind of optical fiber polarization controller that light path isolation effect can be provided, it is characterized in that, including: single mode introducing optical fiber, the incident optical collimator, quarter-wave plate, 1/2nd wave plates, optoisolator, outgoing optical fiber collimator and the outgoing optical fiber that are placed sequentially on its transmitting axis.Described incident optical collimator, outgoing optical fiber collimator are individually fixed on the adjustable support of pitching, it is possible to realize beam alignment exactly so that whole optical fiber polarization controller has low-down insertion loss.The present invention realizes the manipulation of light polarization by the anglec of rotation regulation of quarter-wave plate and 1/2nd wave plates, optoisolator is integrated in optical fiber polarization controller, make whole device architecture simple, compact, described all of optical component is each attached on the base be made up of indium Steel material, significantly reduces the variation of ambient temperature impact on system light path structure.At present, this device has been trial-produceed successfully, the polarization beat length of light beam in optical fiber femtosecond laser frequency comb, has the extraordinary optically isolated and effect of polarization state regulation.
Description
One, technical field
The present invention relates to the laser polarization control technology in optical fiber optical frequency com system, particularly relate to a kind of band
There is the optical fiber polarization controller of light beam isolation features.
Two, background technology
Since Nobel Prize in physics since 2005 is presented to light comb inventor, optical comb technology has obtained pole
Big development and being widely applied, and have become as the instrument that a lot of optics Disciplinary Frontiers is indispensable, especially
Being as the development of optical fiber technology, high-precision optical frequency com system of new generation mostly uses advanced person's
Technical scheme based on optical fiber.In optical fiber optical frequency com system, from flying of laserresonator coupling output
Pulse per second (PPS) power is the least, and either during follow-up power amplification or laser spread spectrum, pulse is at light
Polarization state in fibre directly determines the efficiency of frequency multiplication and spread spectrum, therefore, the polarized controller in system
Output steady in a long-term is realized for optical frequency com and plays vital effect.
Traditional Polarization Controller mainly has with Types Below: optical fiber polarization controller based on optical fiber micro-bending effect,
Polarization Controller based on optical fiber extruding, the Polarization Controller and based on Electro-optical Modulation rotated based on wave plate
Polarization Controller.Wherein, the Polarization Controller rotated based on wave plate, can realize from arbitrarily input partially with it
Polarization state is to the conversion of arbitrary output polarization state, and has the advantages such as with low cost, easy to use, it is thus achieved that
It is widely applied.The control of wave plate orientation rotation angle is carried out by combining precision electric motor, can be further
Improve the precision of Polarization Control and realize Automated condtrol.
But, in existing optical fiber optical frequency com system, the rear class of Polarization Controller must add one
Free space isolator, the feedback light in the most anti-locking system is coupled into the resonator cavity of laser instrument and causes live width
Broadening, power swing etc. negatively affect；On the other hand, spread spectrum and the frequency multiplication of light beam is all based on polarization independent
Physical process, not requiring nothing more than light beam is linear polarization, also require polarization state can with highly nonlinear optical fiber and
Frequency-doubling crystal is mated.Current Polarization Controller does not has the function of integrated optical isolator, at optical fiber optics frequency
The actual application of rate comb has the disadvantage that (1) optical fiber polarization controller and optoisolator are all operated in freedom
Space, light beam needs repeatedly to couple at optical fiber and free space, owing to the absorption of light beam is imitated by collimator
Rate is limited, causes the reduction of luminous power, is unfavorable for follow-up frequency multiplication and spread spectrum；(2) light beam is at free space
While optical fiber carries out many secondary coupling, it is necessary to have many to import optical fiber and multiple optical fiber collimator, no
Increase only cost and the complexity of system, and occupy more system space.
Three, summary of the invention
(1) goal of the invention
The problem that the invention aims to the Polarization Controller being badly in need of in solution optical frequency com system,
Propose a kind of isolated Polarization Controller device.Optical fiber polarization controller provided by the present invention is integrated with
Polarization Control and optically isolated two kinds of effects, be effectively saved space and the cost of device, be more conducive to realize light
Learning the integration of frequency comb, the steady in a long-term operation for optical frequency com provides reliable technical support.
(2) technical scheme:
The present invention solves that the scheme that its technical problem is used is: described isolated optical fiber Polarization Controller,
As shown in Figure 1 to Figure 3, it is characterised in that including: incident optical (1), incident optical collimator (2),
Incident illumination collimator pitch regulation platform (3), quarter-wave plate (4), 1/2nd wave plates (5), optoisolator (6),
Emergent light collimator pitch regulation platform (7), outgoing optical fiber collimator (8) and outgoing optical fiber (9) and base support
(10)。
Described incident optical (1) and outgoing optical fiber (9) are single-mode fiber, described incident optical collimator (2)
And outgoing optical fiber collimator (8), it is characterised in that use gradient-index lens, incident optical collimator (2)
Making light beam be coupled into free space by optical fiber and collimate output, outgoing optical fiber collimator (8) is responsible for collection and is fallen to counting
Light beam in value aperture, and light beam coupling is entered spread fiber.
The major optical part of described Polarization Controller by quarter-wave plate (4), 1/2nd wave plates (5) and
Optoisolator (6) cascade forms, and all of wave plate is equipped with a graduation indication dish, and described graduation indication dish is
Circulus, scale unit is angular unit, using the teaching of the invention it is possible to provide current wave plate or the rotation angle information of isolator.
By regulating the anglec of rotation of two kinds of wave plates, it is possible to achieve the arbitrarily accurate control of output polarization state, promptly
Obtain the polarized light needed for experiment, there is good repeatability.Optoisolator (6) is that one only allows Unidirectional light
The Passive Optical Components passed through, it is possible to avoid backward feedback light on input light source impact, it is characterised in that light every
From device and two wave plate coaxial placements in free space, by rotating the orientation angle of regulation isolator, can
So that required linear polarization obtains maximum luminous power output, and it is minimum that the loss of light intensity is down to.Ripple
The anglec of rotation of sheet and isolator can be locked by screw after adjusting, and significantly reduces machinery
The vibration impact on optical system.
Described base support (10) can provide the support to whole system device, it is ensured that light beam passes through each wave plate
And the photocentre of isolator, and the position relationship of fixing each parts, additionally, this base can be screwed
On the optical table of standard.
(3) technique effect
It is an advantage of the current invention that and optoisolator is effectively combined with wave plate group, make an optics
Device has Polarization Control and optically isolated function simultaneously, is particularly suitable in optical frequency com system using partially
Shake the occasion of controller, while saving system space, have that control accuracy is high, insertion loss is low, property
The advantages such as energy is stable, easy to use.This device has reserved importing optical fiber and outgoing optical fiber, is welded by optical fiber
Technology goes for different fiber types.
Four, accompanying drawing explanation
Fig. 1 is the overall structure figure of the isolated Polarization Controller of the present invention；
Fig. 2 is the explosive view of the isolated Polarization Controller of the present invention；
Fig. 3 is the sectional view of the isolated Polarization Controller of the present invention.
Five, detailed description of the invention
With specific embodiment, the present invention is elaborated below in conjunction with the accompanying drawings.
The local structural graph of the isolated Polarization Controller that the present invention proposes is as it is shown in figure 1, include being linked in sequence
Incident optical (1), incident optical collimator (2), incident illumination collimator pitch regulation platform (3), quarter-wave
Sheet (4), 1/2nd wave plates (5), optoisolator (6), emergent light collimator pitch regulation platform (7), emergent light
Fine collimator (8), outgoing optical fiber (9) and base (10).
This device is when making, and first, incident optical 1 is connected to incident illumination collimator 2, then will collimation
Device is fixed on incident illumination collimator pitch regulation platform 3.In like manner, can be by outgoing optical fiber 9, emergent light collimator
8 and emergent light collimator pitch regulation platform 7 be connected.In order to ensure that the output of incident illumination collimator can be efficiently
It is coupled into emergent light collimator, now, a branch of optical-fiber laser can be introduced, and be coupled into incident optical,
By changing degree of tightness and then the deflection of regulation collimator output beam of pitch regulation platform screwing, make two
Collimator coaxial placement.Quarter-wave plate 4,1/2nd wave plate 5 and optoisolator 6 are individually fixed in
Each on support, place with one heart on guide rail successively.In view of the environmental change impact on light path system, institute
Some optical components are each attached on the base be made up of indium Steel material, and so far, this patent of invention has been implemented
Become.
The operation principle of patent of the present invention is such that the optical signal of a branch of random polarization state composition and enters incident illumination
Fibre is propagated, makes light beam be coupled to free space by optical fiber and collimate output by incident illumination collimator, work as light
When bundle normal incidence is to wave plate, by according to Malus' law along two major axes orientations of wave plate be decomposed into orthogonal partially
Shake light: o light and e light, and the light of o light and e light is strongly dependent upon the polarization direction of light beam and the angle of wave plate main shaft,
When o light and e light export through wave plate, it will produce the phase contrast of adnexa, make the polarization state of incident beam send out
Changing.Such as: the phase contrast that 1/2nd wave plates will cause o light and e light to produce π；Quarter-wave
Sheet can produce the phase contrast of pi/2.Be worth explanation a bit, when the anglec of rotation of wave plate changes,
The main shaft of wave plate also will change therewith, owing to the edge labelling of wave plate has the scale of standard, by changing continuously
Become the anglec of rotation of two wave plates, so that emergent light travels through all of polarization state.The once polarization of light beam
State meets necessary requirement, can carry out locked to the anglec of rotation of wave plate by lateral screw, prevent machinery
The vibration impact on light path.
In order to ensure that the unidirectional of light beam is placed with optoisolator by characteristic on the transmitted light path of wave plate group,
It utilizes magneto-optic effect, can effectively intercept the transmission of backward beam, and the light beam after isolation passes through outgoing
Optical collimator is coupled into outgoing optical fiber, and realizes the output of the controlled light beam of polarization state.
Present invention optical fiber polarization controller relatively the most in the market has a following advantage:
1) maintain the feature of optical fiber polarization controller simple in construction, newly increased optically isolated function, effectively prevented
Only the feedback light of reverse transfers causes the reduction of light source performance；
2) group of 1/2nd wave plates and quarter-wave plate and, it is possible to achieve the continuously adjustabe of output polarization beam state,
There is the highest motility, in conjunction with wave plate anglec of rotation locking device, the reliable of system can be increased substantially
Property and repeatability；
3) significantly the reducing of system dimension: the length of traditional fibre optic isolater has had 6cm, Polarization Controller
Size at 9cm, the integrated the longest 7.5cm of device overall dimensions that the present invention develops, simultaneously device
Cost reduces the most accordingly.
The isolated optical fiber Polarization Controller that the present invention makes, has making simple, easy for installation, mechanical surely
Qualitative height, to generating the advantages such as technological requirement is low, can be widely applied to light polarization regulation needs simultaneously
The occasion of feedback light to be isolated, is particularly well-suited to the use of optical frequency com system, before having good development
Scape.
Claims (1)
1. an isolated optical fiber polarization controller, it is characterised in that including:
Incident optical (1), the optical signal of random polarization state composition enters system by incident optical；
Incident optical collimator (2), is connected with the outfan of incident optical (1), makes light beam be coupled to certainly by optical fiber
By space and collimate output；
Incident illumination collimator pitch regulation platform (3), for fixing incident optical fiber collimator, it is possible to export it
The deflection of light beam carries out fine adjustment；
Quarter-wave plate (4), is placed on the transmitted light path of incident optical collimator (2), inclined to incident illumination
Polarization state is adjusted；
/ 2nd wave plates (5), after being placed on quarter-wave plate (4), enter the polarization state of incident illumination
The regulation of one step；
Isolator (6), is placed on the transmitted light path of 1/2nd wave plates (5), it is ensured that light beam unidirectional by spy
Property；
Emergent light collimator pitch regulation platform (7), is used for fixing outgoing optical fiber collimator (8), can be to its light
Direction of principal axis angle carries out fine adjustment；
Outgoing optical fiber collimator (8), after being placed on isolator (6), enters the collimated beam through isolator (6)
Row is collected and coupled to optical fiber；
Outgoing optical fiber (9), input is connected, by optical fiber output beam with the outfan (8) of optical fiber collimator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154406.XA CN106154422A (en) | 2015-03-31 | 2015-03-31 | A kind of isolated optical fiber polarization controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154406.XA CN106154422A (en) | 2015-03-31 | 2015-03-31 | A kind of isolated optical fiber polarization controller |
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| CN106154422A true CN106154422A (en) | 2016-11-23 |
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| CN201510154406.XA Pending CN106154422A (en) | 2015-03-31 | 2015-03-31 | A kind of isolated optical fiber polarization controller |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102436A (en) * | 2017-05-10 | 2017-08-29 | 中国计量大学 | A kind of wave plate group design method for compensating any optical phase put-off |
| WO2019000833A1 (en) * | 2017-06-30 | 2019-01-03 | 深圳市创鑫激光股份有限公司 | Method for adjusting degree of isolation, optical fiber isolator, and fiber laser |
| CN110596916A (en) * | 2019-10-14 | 2019-12-20 | 青岛自贸激光科技有限公司 | Miniature magnetic control light polarization controller |
| CN113285347A (en) * | 2021-05-18 | 2021-08-20 | 陕西澳威激光科技有限公司 | Wavelength-selective laser integrated with polarization controller and processing method thereof |
| CN114624009A (en) * | 2022-03-15 | 2022-06-14 | 河南理工大学 | Opto-isolator performance automatic check out system based on circular polarisation |
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| CN203326348U (en) * | 2013-06-05 | 2013-12-04 | 北京工业大学 | Tunable-wavelength deep ultraviolet light laser |
| CN104319617A (en) * | 2014-11-20 | 2015-01-28 | 广东量泽激光技术有限公司 | Laser device adjustable in bandwidth and central wavelength |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203326348U (en) * | 2013-06-05 | 2013-12-04 | 北京工业大学 | Tunable-wavelength deep ultraviolet light laser |
| CN104319617A (en) * | 2014-11-20 | 2015-01-28 | 广东量泽激光技术有限公司 | Laser device adjustable in bandwidth and central wavelength |
Non-Patent Citations (2)
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| 刘洋: "偏振控制器及其算法研究", 《浙江大学硕士学位论文》 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102436A (en) * | 2017-05-10 | 2017-08-29 | 中国计量大学 | A kind of wave plate group design method for compensating any optical phase put-off |
| WO2019000833A1 (en) * | 2017-06-30 | 2019-01-03 | 深圳市创鑫激光股份有限公司 | Method for adjusting degree of isolation, optical fiber isolator, and fiber laser |
| CN110596916A (en) * | 2019-10-14 | 2019-12-20 | 青岛自贸激光科技有限公司 | Miniature magnetic control light polarization controller |
| CN113285347A (en) * | 2021-05-18 | 2021-08-20 | 陕西澳威激光科技有限公司 | Wavelength-selective laser integrated with polarization controller and processing method thereof |
| CN114624009A (en) * | 2022-03-15 | 2022-06-14 | 河南理工大学 | Opto-isolator performance automatic check out system based on circular polarisation |
| CN114624009B (en) * | 2022-03-15 | 2023-10-10 | 河南理工大学 | Optical isolator performance automatic detection system based on circular polarization |
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