CN103605182A - Reflection-type optical attenuator and method for attenuating power of optical waves - Google Patents
Reflection-type optical attenuator and method for attenuating power of optical waves Download PDFInfo
- Publication number
- CN103605182A CN103605182A CN201310640021.5A CN201310640021A CN103605182A CN 103605182 A CN103605182 A CN 103605182A CN 201310640021 A CN201310640021 A CN 201310640021A CN 103605182 A CN103605182 A CN 103605182A
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- light wave
- light
- attenuator
- wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
- G02B6/266—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a reflection-type optical attenuator. The reflection-type optical attenuator comprises an input optical fiber, a lens, a reflecting mirror and an output optical fiber, and further comprises a diaphragm arranged between the lens and the reflecting mirror, the diaphragm is used for partially covering optical waves, the covered energy of the optical waves with large wave lengths is more than that of the optical waves with small wave lengths so that the aim of reducing the WDL of the optical attenuator can be achieved. The diaphragm is arranged between the lens and the reflecting mirror of the optical attenuator, the diaphragm is used for covering part of the optical waves, the covered energy of the long waves is more than that of the short waves, and therefore the coupling efficiency of the long waves and the coupling efficiency of the short waves are close or equal, and the WDL is effectively compensated. In addition, due to the fact the method of adding chromatic dispersion is prevented from being adopted, the caused problems of film plating difficulty and PDL increasing are avoided, and therefore on the premise of not increasing the film plating difficulty and not deteriorating PDL indexes, the WDL indexes in the optical power attenuation process are reduced.
Description
Technical field
The present invention relates to technical field of optical fiber communication, more particularly, a kind of method that relates to reflecting light attenuator and the power of light wave is decayed.
Background technology
In optical fiber telecommunications system, there are many scenes need to reduce the power of light signal, as: photoreceiver is very sensitive to the overload of luminous power, power input must be controlled in the input range of photoreceiver, prevents that it is saturated; Balance between the different channels power input before image intensifer, can prevent that the power input of certain or some channels is excessive and light amplifier gain is saturated.
The power attenuation that optical attenuator can be expected light signal according to user's requirement.Optical attenuator comprises the polytypes such as mechanical light attenuator, magneto-optic attenuator, MEMS (micro electro mechanical system) optical attenuator, thermo-optical attenuator, acousto-optic attenuator, and wherein, MEMS (micro electro mechanical system) optical attenuator can be divided into again two kinds of reflective and light-barrier types.
The input optical fibre of reflecting light attenuator and output optical fibre are realized coupling by catoptron, rotate change angle realize optical power attenuation by catoptron.But reflecting light attenuator is because light wave dispersion meeting produces WDL(Wavelength Dependent Loss, Wavelength Dependent Loss), particularly, when optical power attenuation is larger, WDL problem is more serious.
In prior art, reduce reflecting light attenuator WDL measure mainly: by increasing dispersion, change the angle of the light of different wave length, realize the compensation to WDL.But above-mentioned measure meeting brings difficulty to plated film (being coated with anti-reflection film on the glass inclined-plane for increasing dispersion), and worsens PDL(Polarize Dependent Loss, Polarization Dependent Loss) index.
Summary of the invention
A kind of method that the invention provides reflecting light attenuator and the power of light wave is decayed, with not increasing plated film difficulty and worsening under the prerequisite of PDL index, reduces the WDL index in optical power attenuation process.
For achieving the above object, the invention provides following technical scheme:
A kind of reflecting light attenuator, comprise: input optical fibre, lens, catoptron and output optical fibre, described reflecting light attenuator also comprises: the diaphragm between described lens and described catoptron, described diaphragm is for partial occlusion light wave, make energy that the light wave of longer wavelength in described light wave is blocked more than the light wave of shorter wavelength, to reach the object that reduces described reflecting light attenuator WDL.
Preferably, to block the limit of described light wave be a straight flange to described diaphragm.
Preferably, the vertical range that the center of the hot spot that described light wave is and described diaphragm block the limit of described light wave is 4 μ m～8 μ m, comprises endpoint value.
The vertical range that the center of the hot spot that preferably, described light wave is and described diaphragm block the limit of described light wave is 6 μ m.
Preferably, described light wave extremely only passes through described diaphragm once the light path of described output optical fibre from described input optical fibre.
Preferably, described diaphragm is positioned in the light path before described light wave is reflected by described catoptron.
Preferably, described diaphragm is positioned in the light path after described light wave is reflected by described catoptron.
Preferably, the axis of the axis of described input optical fibre, described output light and the optical axis three of described lens are parallel to each other.
Preferably, the distance of the axis of described input optical fibre and the optical axis of described lens equals the distance of the axis of described output optical fibre and the optical axis of described lens.
The present invention also provides a kind of method that the power of light wave is decayed, and comprising: the diaphragm of reflecting light attenuator described in above any one is adjusted to predeterminated position; Utilize described reflecting light attenuator to decay to the power of light wave, make to be positioned at light wave described in the diaphragm partial occlusion of described predeterminated position, to reduce the Wavelength Dependent Loss of described reflecting light attenuator.
Compared with prior art, technical scheme provided by the present invention at least has the following advantages:
Reflecting light attenuator provided by the present invention and the method that the power of light wave is decayed, by diaphragm being set between the lens at optical attenuator and catoptron, utilize diaphragm shield portions light wave, make energy that the light wave of longer wavelength is blocked more than the light wave of shorter wavelength, thereby when through diaphragm, when the light wave after decay arrives output optical fibre end face, the light wave of longer wavelength can approach or equate with the coupling efficiency of the light wave of shorter wavelength, because WDL is the absolute value of maximum coupling efficiency and minimum coupling efficiency difference in operating wavelength range, can be simplified to the absolute value of the difference of long wavelength's the coupling efficiency of light wave and the coupling efficiency of the light wave of minimal wave length, therefore, adopt apparatus and method provided by the present invention that WDL index is reduced, realized the effective compensation to WDL.And, because the present invention avoids adopting the method that increases dispersion, but the method compensation WDL that adopts diaphragm to block, therefore the problem also increasing with regard to the plated film difficulty having avoided causing by increasing the method for dispersion and PDL, thereby the present invention can, not increasing plated film difficulty and worsening under the prerequisite of PDL index, reduce the WDL index in optical power attenuation process.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the basic block diagram of reflecting light attenuator in prior art;
Fig. 2 is the decay schematic diagram of reflecting light attenuator in prior art;
The basic block diagram of the reflecting light attenuator that Fig. 3 provides for the embodiment of the present invention;
The schematic diagram of diaphragm partial occlusion light wave in the reflecting light attenuator that Fig. 4 provides for the embodiment of the present invention;
The decay schematic diagram of the reflecting light attenuator that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the optical attenuator schematic diagram that WDL changes with IL while not setting up diaphragm;
The schematic diagram that the WDL of the optical attenuator that Fig. 7 provides for the embodiment of the present invention changes with IL.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that, so the present invention is not subject to the restriction of following public specific embodiment.
Secondly, the present invention is described in detail in conjunction with schematic diagram, when the embodiment of the present invention is described in detail in detail; for ease of explanation; the sectional view that represents device architecture can be disobeyed general ratio and be done local amplification, and described schematic diagram is example, and it should not limit the scope of protection of the invention at this.The three-dimensional space that should comprise in addition, length, width and the degree of depth in actual fabrication.
As described in background, in prior art there is the problem of WDL in reflecting light attenuator.As shown in Figure 1, light wave enters in optical attenuator by input optical fibre 101, collimating effect through lens 102, arrive catoptron 103, catoptron 103, by the different pitch angle of rotation, makes light wave produce decay in various degree, and then the focussing force of process lens 102, arrive the section of output optical fibre 104, through output optical fibre 104 outputs.
The process that 103 pairs of light waves of catoptron are decayed is supervened WDL, light wave at the hot spot of the end face of output optical fibre 104 as shown in Figure 2, from fiber optics, the spot size of optical fiber different wave length is different, the light of the light ratio longer wavelength of shorter wavelength is limited to the center of optical fiber more closely, and the radius of long wave mould field 202 is greater than the radius of shortwave mould field 203.Light wave arrives the end face of output optical fibre 104 and when attenuation state (being hot spot and output optical fibre end face side direction mismatch), suppose that spot center is identical with the distance between fibre core 201 centers, the light wave coupling efficiency of longer wavelength (being the hot spot 204 of longer wavelength and the overlapping degree of fibre core 201), higher than the light wave coupling efficiency (being the hot spot 205 of shorter wavelength and the overlapping degree of fibre core 201) of shorter wavelength, causes WDL problem.
And if employing increases the method for dispersion, according to the difference of wavelength, light wave is carried out in angle to separation, make the hot spot of fiber end face produce departing from of different angles, from concentric hot spot, become non-concentric hot spot, make the hot spot of different wave length drop on the diverse location of fibre core 201, reach the object that the hot spot of shorter wavelength and the overlapping degree of fibre core approached or equaled the hot spot of longer wavelength and the overlapping degree of fibre core, thereby realize the compensation to WDL to a certain extent.
But inventor studies discovery, the method only could realize the effective compensation to WDL when light wave has larger incident angle, and this just causes the increase of plated film difficulty on the glass inclined-plane that increases dispersion; On the other hand, because the generation of PDL is mainly different caused at transmissivity or the reflectivity of two medium intersections with compressional wave by shear wave, shear wave and compressional wave incident angle be 0 degree or approach 90 degree in minimum, corresponding PDL is minimum, and at 0 degree, to there being an angle difference maximum between 90 degree, now corresponding PDL is maximum, therefore when the incident angle of light wave is larger, incident angle can not be 0 degree, also can not or approach 90 degree for 90 degree, can cause the deterioration of PDL index.
For the problems referred to above, the present embodiment provides a kind of reflecting light attenuator, and its structure as shown in Figure 3, comprising: input optical fibre 301, lens 302, catoptron 303 and output optical fibre 304, and described reflecting light attenuator also comprises:
The course of work of the reflecting light attenuator that the present embodiment provides is: the light wave that utilizes input optical fibre 301 transmittings to comprise different wavelengths of light wave component, utilize lens 302 these light waves of collimation, the light wave that utilizes catoptron 303 to receive through lens 302, light wave is reflected, make light wave finally can enter output optical fibre 304, and by making catoptron 303 rotation different inclination angle control the pad value of light wave, utilize 302 pairs of light waves of decaying through catoptron 303 of lens to focus on, make light wave enter output optical fibre 304, finally utilize output optical fibre 304 that light wave is launched.When light wave is propagated between lens 302 and catoptron 303, utilize diaphragm 305 shield portions light waves, to reduce the WDL of optical attenuator.
Reflecting light attenuator in the present embodiment can reduce the WDL producing in light wave attenuation process, its concrete principle is: when optical attenuator is not set up diaphragm, light wave after Optical Fiber Transmission, waist radius ω (unit: um) with wavelength X (unit: nm) be correlated with.When wavelength coverage less (as: C-Band using in optical fiber communication, about 1530nm is to 1570nm), the functional relation between waist radius ω and wavelength X can be similar to and be write as: ω (λ)=ω
0+ a * (λ-λ
0) (wherein, a is constant coefficient, λ
0the minimum wavelength in whole wavelength coverage, ω
0for waist radius corresponding to minimum wavelength).
Optical attenuator is when attenuation state, and the insertion loss formula of the light wave after decay (being the circular Gaussian beam of side direction mismatch) is:
(wherein, Δ is the distance between the rear light wave center of decay and fibre core, the i.e. value of light wave side direction mismatch), will obtain after this simplification of a formula:
formula from abbreviation can be found out, in the situation that the hot spot side direction mismatch of light different wave length is identical, the insertion loss of the light of different wave length is different, produces WDL problem.
Definition Wavelength Dependent Loss is the difference between the interior maximum insertion of operating wavelength range and minimum insertion loss, known in conjunction with above formula, Wavelength Dependent Loss WDL=|IL(λ when side direction mismatch Δ
min)-IL(λ
max) |, (wherein, λ
minand λ
maxrepresent respectively minimum wavelength and maximum wavelength in operating wavelength range).
Suppose that operating wavelength range is that 1530nm(is λ
0) to 1570nm, waist radius when the two transmits in optical fiber is respectively 5.14 μ m and 5.26 μ m, according to ω (λ)=ω
0+ a * (λ-λ
0), can obtain a=0.003, further obtain ω (λ)=ω
0+ 0.003 * (λ-λ
0), substitution
in, utilize WDL=|IL(λ
min)-IL(λ
max) |, can calculate Wavelength Dependent Loss WDL with the situation of change of insertion loss IL, as shown in Figure 6, in figure, transverse axis represents the insertion loss of middle wavelength in operating wavelength range, the Wavelength Dependent Loss when longitudinal axis represents not set up diaphragm.
When optical attenuator is set up diaphragm, suppose that light wave is after being collimated by lens 302, before arriving catoptron 303, by diaphragm 305 partial occlusions, as shown in Figure 4, if the spot center of each wavelength is overlapping in light wave, due to hot spot 401 radiuses of longer wavelength, be greater than the radius of the hot spot 402 of shorter wavelength, therefore the ratio of the two energy being blocked is different, and the power that the light of the power ratio shorter wavelength that the light of longer wavelength is blocked is blocked is high.
As shown in Figure 5, in the fibre core 501 of output optical fibre, the radius of long wave mould field 502 is greater than the radius of shortwave mould field 503.While arriving output optical fibre end face after light wave is reflected mirror decay, the side direction mismatch Δ of supposing the light of longer wavelength and the light of shorter wavelength is identical, the power that the power being blocked due to the hot spot 401 of longer wavelength is blocked higher than the hot spot 402 of shorter wavelength, the lap of the hot spot 401 of longer wavelength and the lap of long wave mould field 502 and the hot spot 402 of shorter wavelength and shortwave mould field 503 approaches or equates, be that the insertion loss of light of longer wavelength and the insertion loss of the light of shorter wavelength approach or equate, the difference of the two diminishes, thereby the value of Wavelength Dependent Loss WDL diminishes, realized the effective compensation to WDL.
Concrete, if diaphragm 305 blocks the limit of light wave, be a straight flange, suppose that the distance of the straight flange that block to diaphragm 305 at the center of hot spot is m, now, the formula of insertion loss becomes:
。According to wavelength coverage be 1530nm to 1570nm, waist radius when the two transmits in optical fiber is respectively 5.14 μ m and 5.26 μ m, i.e. a=0.003.When m=6, (if the value of m is too large, optimize the DeGrain of WDL; If the value of m is too little, the luminous energy that gear falls is too many, can worsen the coupling efficiency of light wave while not decaying), can calculate WDL with the situation of change of insertion loss IL, as shown in Figure 6, in figure, transverse axis represents the insertion loss of middle wavelength in operating wavelength range, the Wavelength Dependent Loss when longitudinal axis represents to set up diaphragm.WDL compares with the situation of change of insertion loss IL when not setting up diaphragm, can draw, set up diaphragm after WDL reduce about 0.2dB.
Side direction mismatch Δ=0, optical attenuator when unattenuated state, IL(λ
min)=0.0917dB, does not obviously worsen insertion loss.
It should be noted that, the present embodiment only be take the limit that described diaphragm 305 blocks described light wave and is described as a straight flange as example, and diaphragm 305 blocks light wave and also can, for other form, at this, not limit.
In addition, the degree that 305 pairs of hot spots of diaphragm block also can be according to actual conditions, calculate, so that the position of diaphragm 305 to be set accordingly in conjunction with the pad value of needed luminous power.When the limit that diaphragm 305 blocks light wave is a straight flange, the vertical range that the center of the hot spot that described light wave is and described diaphragm block the limit of described light wave can be preferably 4 μ m～8 μ m, comprises endpoint value, more preferably 6 μ m.
And by setting up on the basis of diaphragm 305 shield portions light waves with the core concept of compensation WDL value, to diaphragm 305, the concrete facilities in optical attenuator does not limit the present embodiment of the present invention, it can have various deformation.As: as described in making light wave from as described in input optical fibre 301 to as described in preferably only pass through the light path of output optical fibre 304 as described in diaphragm 305 once; Described diaphragm 305 is positioned in the light path before described light wave is reflected by described catoptron 303; The light path that described diaphragm 305 is positioned at after described light wave is reflected by described catoptron 303 is first-class.
In the present embodiment, the axis of the axis of described input optical fibre 301, described output light 304 and the optical axis three of described lens 302 can be parallel to each other.The distance of the optical axis of the axis of described input optical fibre 301 and described lens 302 equals the distance of the axis of described output optical fibre 304 and the optical axis of described lens 302.
Corresponding with said apparatus, the present embodiment also provides a kind of method that the power of light wave is decayed, and comprising:
The diaphragm of the reflecting light attenuator described in the present embodiment is adjusted to predeterminated position;
Wherein, the predeterminated position of diaphragm is coming through simulation calculation.
Utilize described reflecting light attenuator to decay to the power of light wave, make to be positioned at light wave described in the diaphragm partial occlusion of described predeterminated position, to reduce the Wavelength Dependent Loss of described reflecting light attenuator.
The reflecting light attenuator that the present embodiment provides and the method that the power of light wave is decayed, by diaphragm being set between lens and catoptron, make diaphragm partial occlusion light wave, different according to the light wave spot size of different wave length, the part that the light wave that makes part that the light wave of longer wavelength is blocked be greater than shorter wavelength is blocked, light wave after being blocked is arrived in the hot spot while exporting light end face, the hot spot of longer wavelength approaches or equates with the lap of shortwave mould field with lap and the shorter wavelength hot spot of long wave mould field, this also just makes the insertion loss of the light wave of longer wavelength and the light wave of shorter wavelength approach or equate, thereby realized the compensation to Wavelength Dependent Loss WDL, reduced WDL index.
And, because the present embodiment is to utilize the method that diaphragm shield portions light wave is set to compensate WDL's, therefore also just avoided available technology adopting to increase the method compensation caused plated film difficulty of WDL of dispersion and the problem that PDL index increases, thereby realized not increasing plated film difficulty and worsening under the prerequisite of PDL index, reduced the WDL index in optical power attenuation process.
Although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (10)
1. a reflecting light attenuator, comprising: input optical fibre, lens, catoptron and output optical fibre, it is characterized in that, and described reflecting light attenuator also comprises:
Diaphragm between described lens and described catoptron, described diaphragm is for partial occlusion light wave, makes energy that the light wave of longer wavelength in described light wave is blocked more than the light wave of shorter wavelength, to reach the object that reduces described reflecting light attenuator WDL.
2. reflecting light attenuator according to claim 1, is characterized in that, the limit that described diaphragm blocks described light wave is a straight flange.
3. reflecting light attenuator according to claim 2, is characterized in that, the vertical range that the center of the hot spot that described light wave is and described diaphragm block the limit of described light wave is 4 μ m～8 μ m, comprises endpoint value.
4. reflecting light attenuator according to claim 3, is characterized in that, the vertical range that the center of the hot spot that described light wave is and described diaphragm block the limit of described light wave is 6 μ m.
5. reflecting light attenuator according to claim 1, is characterized in that, described light wave extremely only passes through described diaphragm once the light path of described output optical fibre from described input optical fibre.
6. reflecting light attenuator according to claim 5, is characterized in that, described diaphragm is positioned in the light path before described light wave is reflected by described catoptron.
7. reflecting light attenuator according to claim 5, is characterized in that, described diaphragm is positioned in the light path after described light wave is reflected by described catoptron.
8. reflecting light attenuator according to claim 1, is characterized in that, the axis of the axis of described input optical fibre, described output light and the optical axis three of described lens are parallel to each other.
9. reflecting light attenuator according to claim 8, is characterized in that, the distance of the axis of described input optical fibre and the optical axis of described lens equals the distance of the axis of described output optical fibre and the optical axis of described lens.
10. the method power of light wave being decayed, is characterized in that, comprising:
The diaphragm of reflecting light attenuator described in claim 1～9 any one is adjusted to predeterminated position;
Utilize described reflecting light attenuator to decay to the power of light wave, make to be positioned at light wave described in the diaphragm partial occlusion of described predeterminated position, to reduce the Wavelength Dependent Loss of described reflecting light attenuator.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310640021.5A CN103605182A (en) | 2013-12-02 | 2013-12-02 | Reflection-type optical attenuator and method for attenuating power of optical waves |
| PCT/CN2014/089013 WO2015081761A1 (en) | 2013-12-02 | 2014-10-21 | Reflective optical attenuator and method for attenuating power of optical wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310640021.5A CN103605182A (en) | 2013-12-02 | 2013-12-02 | Reflection-type optical attenuator and method for attenuating power of optical waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103605182A true CN103605182A (en) | 2014-02-26 |
Family
ID=50123422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310640021.5A Pending CN103605182A (en) | 2013-12-02 | 2013-12-02 | Reflection-type optical attenuator and method for attenuating power of optical waves |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103605182A (en) |
| WO (1) | WO2015081761A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297855A (en) * | 2014-08-27 | 2015-01-21 | 徐州旭海光电科技有限公司 | Optical attenuator of wave length related loss compensation and compensation method |
| WO2015081761A1 (en) * | 2013-12-02 | 2015-06-11 | 四川飞阳科技有限公司 | Reflective optical attenuator and method for attenuating power of optical wave |
| CN108513220A (en) * | 2016-04-07 | 2018-09-07 | 李永宏 | A kind of scaling method towards between the master controller and shaft of exempting to draw wheat microphone |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020061179A1 (en) * | 2000-10-04 | 2002-05-23 | Masahito Morimoto | Variable optical attenuator |
| CN1936633A (en) * | 2005-08-08 | 2007-03-28 | Jds尤尼弗思公司 | Variable optical attenuator with wavelength dependent loss compensation |
| US8280218B2 (en) * | 2006-04-10 | 2012-10-02 | Neophotonics Corporation | Optical attenuator |
| CN202956503U (en) * | 2012-12-07 | 2013-05-29 | 昂纳信息技术（深圳）有限公司 | Variable optical attenuator with wavelength dependent loss compensation function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6954580B2 (en) * | 2002-03-01 | 2005-10-11 | Jds Uniphase Corporation | Optical receiver with high dynamic range |
| GB0306008D0 (en) * | 2003-03-15 | 2003-04-23 | Qinetiq Ltd | Optical device |
| CN1292276C (en) * | 2004-07-21 | 2006-12-27 | 澳谱光通讯器件（上海）有限公司 | Micro motor variable light attenuator |
| CN103605182A (en) * | 2013-12-02 | 2014-02-26 | 四川飞阳科技有限公司 | Reflection-type optical attenuator and method for attenuating power of optical waves |
-
2013
- 2013-12-02 CN CN201310640021.5A patent/CN103605182A/en active Pending
-
2014
- 2014-10-21 WO PCT/CN2014/089013 patent/WO2015081761A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020061179A1 (en) * | 2000-10-04 | 2002-05-23 | Masahito Morimoto | Variable optical attenuator |
| CN1936633A (en) * | 2005-08-08 | 2007-03-28 | Jds尤尼弗思公司 | Variable optical attenuator with wavelength dependent loss compensation |
| US8280218B2 (en) * | 2006-04-10 | 2012-10-02 | Neophotonics Corporation | Optical attenuator |
| CN202956503U (en) * | 2012-12-07 | 2013-05-29 | 昂纳信息技术（深圳）有限公司 | Variable optical attenuator with wavelength dependent loss compensation function |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015081761A1 (en) * | 2013-12-02 | 2015-06-11 | 四川飞阳科技有限公司 | Reflective optical attenuator and method for attenuating power of optical wave |
| CN104297855A (en) * | 2014-08-27 | 2015-01-21 | 徐州旭海光电科技有限公司 | Optical attenuator of wave length related loss compensation and compensation method |
| CN104297855B (en) * | 2014-08-27 | 2017-07-28 | 徐州旭海光电科技有限公司 | The optical attenuator of wavelength dependent loss compensation and compensation method |
| CN108513220A (en) * | 2016-04-07 | 2018-09-07 | 李永宏 | A kind of scaling method towards between the master controller and shaft of exempting to draw wheat microphone |
| CN108650569A (en) * | 2016-04-07 | 2018-10-12 | 李永宏 | One kind is exempted to draw wheat microphone |
| CN108650570A (en) * | 2016-04-07 | 2018-10-12 | 李永宏 | It is a kind of towards exempt from draw wheat microphone exempt from draw wheat method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015081761A1 (en) | 2015-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3785718A (en) | Low dispersion optical fiber | |
| Gloge | Propagation effects in optical fibers | |
| EP2659301B1 (en) | Optical amplifier for multi-core optical fiber | |
| US4749248A (en) | Device for tapping radiation from, or injecting radiation into, single made optical fiber, and communication system comprising same | |
| US8676003B2 (en) | Methods and systems for reducing polarization dependent loss | |
| US5717798A (en) | Optical waveguide system comprising a mode coupling grating and a mode discrimination coupler | |
| EP2518549B1 (en) | Spatial multiplexer for coupling single-mode fibers to a multi-core fiber | |
| KR870000605A (en) | Fiber optic coupler | |
| US6404952B1 (en) | Optical communication system with chromatic dispersion compensation | |
| CN210982809U (en) | Compact optical path hybrid device | |
| US11681110B2 (en) | Apparatus for monitoring the output of an optical system | |
| CN103605182A (en) | Reflection-type optical attenuator and method for attenuating power of optical waves | |
| US9052463B2 (en) | Coupling of a laser source to an optical data distributing device | |
| CA2369191A1 (en) | Optical coupling structure | |
| CN101271176A (en) | Laser beam optical fiber transmission device in laser sodium guide star technology | |
| JPH0311310A (en) | Optical coupler of electro-optic converter module and optical guide | |
| JPS61158306A (en) | Numerical aperture convertor | |
| CN103439806A (en) | Reflective thermo-optic variable optical attenuator | |
| CN204515188U (en) | A kind of adjustable optical attenuator with wavelength dependent loss compensation | |
| CN210982807U (en) | Light path mixing device | |
| JP2004220013A (en) | Optical switch reduced in beam divergence | |
| CN112578503A (en) | System for multi-wavelength signal common-fiber simultaneous transmission | |
| Wood | Increased power injection in multimode optical-fiber buses through mode-selective coupling | |
| US20030108312A1 (en) | Fiber optical devices with high power handling capability | |
| JP2002196192A (en) | Line monitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140226 |