CN102937753A - Optical isolator and optical assembly comprising same - Google Patents
Optical isolator and optical assembly comprising same Download PDFInfo
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- CN102937753A CN102937753A CN2011102340413A CN201110234041A CN102937753A CN 102937753 A CN102937753 A CN 102937753A CN 2011102340413 A CN2011102340413 A CN 2011102340413A CN 201110234041 A CN201110234041 A CN 201110234041A CN 102937753 A CN102937753 A CN 102937753A
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- optical
- light
- optoisolator
- isolator
- fiber adapter
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Abstract
The invention provides an optical isolator. A polarizer, a faraday rotation device and an optical filter are sequentially arranged on a forward light incident optical axis. The invention further provides a light emission assembly transmitter optical subassembly (TOSA) comprising the optical isolator. The light emission assembly TOSA comprises a laser and a single optical fiber adapter. The optical isolator is arranged on a first optical axis between the laser and a single optical fiber adapter light end face. Due to the fact that the optical isolator adopts the optical filter with low price to replace an analyzer with high price, performance of the optical isolator is not affected, and cost of the whole optical isolator is reduced. The invention further provides a single optical fiber bi-directional light transceiving integrated assembly bi-directional optical subassembly (BOSA) comprising the optical isolator. The single optical fiber bi-directional light transceiving integrated assembly BOSA comprises a laser, an optical receiver and a single optical fiber adapter. The optical isolator is arranged on the first optical axis between the laser and the single optical fiber adapter light end face, the light receiver is arranged on a second optical axis, and the second optical axis is perpendicular to the first optical axis.
Description
Technical field
The present invention relates to the high speed optical communication device, relate in particular to a kind of optical assembly that has the optoisolator of isolation backlight and contain this isolator.
Background technology
In the Optical Fiber Transmission of two-forty, long distance, need to stop reflected light with optoisolator, optoisolator is a kind of Passive Optical Components that allows Unidirectional light to pass through, its principle of work is based on the nonreciprocity of Faraday rotation, optoisolator as shown in Figure 1, flashlight for forward entrance, by becoming linearly polarized light behind the polarizer 1, faraday's gyromagnetic medium 2 makes 45 ° of the polarization direction right rotations of flashlight with external magnetic field, and just low-loss by with the analyzer 3 of polarizer placement at 45 °.For backlight, the linearly polarized light of analyzer 3 is during through faraday gyromagnetic medium 2, also 45 ° of right rotations of yawing moment, thus making polarization direction and the polarizer 1 direction quadrature of backlight, can not pass through, so just blocked catoptrical transmission fully.But this defective that structured light isolator volume is large, cost is high has limited its widespread use.
Summary of the invention
For overcoming above shortcoming, the invention provides simple in structure, the optoisolator that cost is low and contain the optical assembly of this isolator.
For realizing above goal of the invention, the invention provides a kind of optoisolator, along being provided with successively on the forward light incident light axis: a polarizer, a Faraday device and an optical filter.
The present invention also provides a kind of light emission component TOSA(Transmitter Optical Sub-assembly that contains aforementioned optoisolator), comprise a laser instrument and a single fiber adapter, described optoisolator is on the primary optic axis between described laser instrument and the single fiber adapter light end face.
The invention provides the also a kind of light transmit-receive integrated assembly BOSA(Bidirectional of single fiber bi-directional Optical Sub-Assembly that contains aforementioned optoisolator), comprise a laser instrument, an optical receiver and a single fiber adapter, described optoisolator is on the primary optic axis between described laser instrument and the single fiber adapter light end face, described optical receiver is positioned on the second optical axis, and this second optical axis is vertical with described primary optic axis.
Because the optoisolator of said structure adopts the lower optical filter of price to substitute the higher analyzer of price, thereby neither affects the performance of optoisolator, has reduced again the cost of whole optoisolator.Optoisolator of the present invention is positioned between laser instrument and the single fiber, consists of a kind of novel light emission component TOSA of high-isolation, prevent that laser emitting light from affecting laser performance after the fiber end face reflection.In addition, light emission component of the present invention is increased by an optical receiver, consist of the light transmit-receive integrated assembly BOSA of the novel single fiber bi-directional of a kind of high-isolation, both can prevent the laser emitting reflection of light, can prevent again single fiber input light reflection interference.
Description of drawings
Fig. 1 represents prior art optical isolator structure synoptic diagram;
Fig. 2 represents optical isolator structure synoptic diagram of the present invention;
Fig. 3 represents separately transmittance graph figure of optical filter P light shown in Figure 2 and S light;
Fig. 4 represents to have the light emission component TOSA structural representation of optoisolator shown in Figure 2;
Fig. 5 represents to have the light transmit-receive integrated assembly BOSA of the single fiber bi-directional structural representation of optoisolator shown in Figure 2.
Embodiment
Describe most preferred embodiment of the present invention in detail below in conjunction with accompanying drawing.
By the P light of optical filter 30 as shown in Figure 3 and S light separately known to the transmittance graph figure, λ 1 expression is satisfied the P light transmission simultaneously more than or equal to optical filter P light required value and the S light transmission minimum wavelength value less than or equal to optical filter S light required value; λ 2 expression is satisfied the P light transmission simultaneously more than or equal to optical filter P light required value and the S light transmission maximum wavelength value less than or equal to optical filter S light required value, and the size of λ 1, λ 2 is big or small relevant with the transmissivity of optical filter 30 defineds.As long as the lambda1-wavelength λ value of optical filter 30 is between λ 1 and λ 2 scopes, by adjusting the polarizer 10, make the forward polarisation of light direction after having rotated 45 ° through faraday's gyromagnetic medium 20 consistent with the P light direction of optical filter 30, polarized light just can remain unchanged by optical filter 30 and polarization direction.Equally, when being incident to optical filter 30 for the backlight of λ value between λ 1 and λ 2 scopes, its polarization direction is any direction, but also only have the polarized light consistent with the P light direction of optical filter 30 just can see through optical filter 30, backlight after the transmission also rotates 45 ° through Faraday device 20 rear polarizer directions, the polarization direction of the direction of polarized light of backlight and the polarizer 10 differs 90 degree after the rotation like this, therefore can not pass through the polarizer 10, thereby reaches the effect of isolation backlight.
The light emission component TOSA with optoisolator 100 shown in Figure 2 as shown in Figure 4 comprises a laser instrument 200 and a single fiber adapter 300, and optoisolator 100 is on the primary optic axis between laser instrument 200 and the single fiber adapter 300 smooth end faces.The incident light forward of laser instrument 200 emissions is by behind the optoisolator 100, reenter the light end face output that is incident upon single fiber adapter 300, and the light that the light end face reflection is returned is because the isolation backlight effect of optoisolator 100, it is normal can not affect laser instrument 200, thereby satisfies the high-speed light emitting module serviceability.
The light transmit-receive integrated assembly BOSA of the single fiber bi-directional with optoisolator 100 shown in Figure 2 as shown in Figure 5, comprise a laser instrument 200, an optical receiver 400 and a single fiber adapter 300, optoisolator 100 is on the primary optic axis between laser instrument 200 and the single fiber adapter 300 smooth end faces, optical receiver 400 is positioned on the second optical axis, and this second optical axis is vertical with primary optic axis.At first successively principle of work and Fig. 4 of the forward light of the light end face output by optoisolator 100, single fiber adapter 300 is identical for laser instrument 200 emission downlink optical signals, does not repeat at this.And after optical filter 30 reflections of optoisolator 100, be incident to optical receiver 400 along the second optical axis from the uplink optical signal of the light surface feeding sputtering of single fiber adapter 300.Adopt the light transmit-receive integrated assembly BOSA of single fiber bi-directional of this structure, just can satisfy the high-isolation requirement of the passive net optical line terminal of high speed.
Claims (4)
1. an optoisolator (100) is characterized in that, along being provided with successively on the forward light incident light axis: a polarizer (10), a Faraday device (20) and an optical filter (30), this optical filter (30) is an angle theta with described incident light optical axis.
2. optoisolator as claimed in claim 1 (100) is characterized in that, described angle theta is 45 °.
3. one kind contains the as claimed in claim 1 or 2 optical assembly of optoisolator (100), it is characterized in that, comprise a laser instrument (200) and a single fiber adapter (300), described optoisolator (100) is positioned on the primary optic axis between described laser instrument (200) and single fiber adapter (300) the light end face.
4. one kind contains the as claimed in claim 1 or 2 optical assembly of optoisolator (100), it is characterized in that, comprise a laser instrument (200), an optical receiver (400) and a single fiber adapter (300), described optoisolator (100) is positioned on the primary optic axis between described laser instrument (200) and single fiber adapter (300) the light end face, described optical receiver (400) is positioned on the second optical axis, and this second optical axis is vertical with described primary optic axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102340413A CN102937753A (en) | 2011-08-16 | 2011-08-16 | Optical isolator and optical assembly comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102340413A CN102937753A (en) | 2011-08-16 | 2011-08-16 | Optical isolator and optical assembly comprising same |
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| CN102937753A true CN102937753A (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102340413A Pending CN102937753A (en) | 2011-08-16 | 2011-08-16 | Optical isolator and optical assembly comprising same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309059A (en) * | 2012-03-16 | 2013-09-18 | 深圳新飞通光电子技术有限公司 | Polarization direction rotator and optical assembly thereof |
| CN105633781A (en) * | 2015-12-28 | 2016-06-01 | 中国科学院光电研究院 | Novel magneto-optical isolation device and active output control method therefor |
| WO2020088473A1 (en) * | 2018-10-29 | 2020-05-07 | 青岛海信宽带多媒体技术有限公司 | Bidirectional optical sub-assembly and optical module |
| WO2021223448A1 (en) * | 2020-05-08 | 2021-11-11 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| WO2023072003A1 (en) * | 2021-10-28 | 2023-05-04 | 华为技术有限公司 | Light-emitting assembly and optical communication apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6461724A (en) * | 1987-09-01 | 1989-03-08 | Nec Corp | Optical isolator |
| CN2935644Y (en) * | 2006-06-22 | 2007-08-15 | 上海未来宽带技术及应用工程研究中心有限公司 | Novel optical isolator with branch function |
| CN101170365A (en) * | 2006-10-25 | 2008-04-30 | 住友金属矿山株式会社 | Bidirectional optical module |
| CN102183828A (en) * | 2011-06-02 | 2011-09-14 | 平湖中天合波通信科技有限公司 | A single fibre bi-directional assembly |
| CN202177756U (en) * | 2011-08-16 | 2012-03-28 | 深圳新飞通光电子技术有限公司 | Optical isolator and light assembly containing same |
-
2011
- 2011-08-16 CN CN2011102340413A patent/CN102937753A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6461724A (en) * | 1987-09-01 | 1989-03-08 | Nec Corp | Optical isolator |
| CN2935644Y (en) * | 2006-06-22 | 2007-08-15 | 上海未来宽带技术及应用工程研究中心有限公司 | Novel optical isolator with branch function |
| CN101170365A (en) * | 2006-10-25 | 2008-04-30 | 住友金属矿山株式会社 | Bidirectional optical module |
| CN102183828A (en) * | 2011-06-02 | 2011-09-14 | 平湖中天合波通信科技有限公司 | A single fibre bi-directional assembly |
| CN202177756U (en) * | 2011-08-16 | 2012-03-28 | 深圳新飞通光电子技术有限公司 | Optical isolator and light assembly containing same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309059A (en) * | 2012-03-16 | 2013-09-18 | 深圳新飞通光电子技术有限公司 | Polarization direction rotator and optical assembly thereof |
| CN105633781A (en) * | 2015-12-28 | 2016-06-01 | 中国科学院光电研究院 | Novel magneto-optical isolation device and active output control method therefor |
| WO2020088473A1 (en) * | 2018-10-29 | 2020-05-07 | 青岛海信宽带多媒体技术有限公司 | Bidirectional optical sub-assembly and optical module |
| WO2021223448A1 (en) * | 2020-05-08 | 2021-11-11 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| WO2023072003A1 (en) * | 2021-10-28 | 2023-05-04 | 华为技术有限公司 | Light-emitting assembly and optical communication apparatus |
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Application publication date: 20130220 |