CN104577708A - High-speed transmission optical assembly with backlight monitoring function - Google Patents
High-speed transmission optical assembly with backlight monitoring function Download PDFInfo
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- CN104577708A CN104577708A CN201410759532.3A CN201410759532A CN104577708A CN 104577708 A CN104577708 A CN 104577708A CN 201410759532 A CN201410759532 A CN 201410759532A CN 104577708 A CN104577708 A CN 104577708A
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Abstract
The invention relates to a high-speed transmission optical assembly with the backlight monitoring function. The high-speed transmission optical assembly comprises a VCSEL (Vertical Cavity Surface Emitting Laser), an incidence collimating lens, a lens matrix, a diaphragm, an emergence focusing lens and a backlight monitoring lens, wherein the lens matrix is provided with a first beam turning face and a second beam turning face; the diaphragm is arranged on the first beam turning face; the diaphragm is divided into two half parts; the top half part is an anti-reflection film; the bottom half part is an energy beam splitting film; light emerged from the VCSEL enters the diaphragm through the incidence collimating lens; one part of light is emitted out through the emergence focusing lens after being reflected by the diaphragm; the other part of light enters a diaphragm matrix by refraction of the energy beam splitting film of the diaphragm, enters the second beam turning face after being totally reflected by the other surface of the diaphragm and is emitted out by the backlight monitoring lens after total reflection. The high-speed transmission optical assembly with the backlight monitoring function can effectively solve the problem that a threshold current of the laser cannot be fed back and regulated in real time as power of output light cannot be monitored at any time in the prior art.
Description
Technical field
The present invention relates to a kind of with backlight monitoring for the optical assembly of high-speed transfer, belong to optical communication field.
Background technology
Along with the development of optical fiber communication technology, data center field and search engine, field of cloud calculation also obtains fast development.A lot of communication company utilizes laser and optical fiber to go to solve a large amount of audio frequency as main method on communication network basis, the transmission of video and data.In order to obtain high bandwidth, light source generally adopts VCSEL laser.
In many applications, the Output optical power of laser is subject to the impact of several factors.The first, in use, the change of ambient temperature will affect the output of luminous power to laser.Its main cause is the change along with temperature, and the lasing threshold electric current of laser also changes thereupon, thus the change causing luminous power to export.Second factor affecting luminous power exporting change is laser in use aging.Its reason is also due to the Long-Time Service along with laser, and the lasing threshold electric current of laser also changes thereupon, thus the change causing luminous power to export.
Based on the various factors affecting VCSEL laser performance, best power output is in use kept in order to ensure laser, should monitor Output optical power, and in prior art, can't accomplish that monitoring Output optical power at any time comes Real-time Feedback adjustment laser threshold current, the problem that the Output optical power that also just cannot solve laser can change.
Therefore be necessary to design a kind of with the optical assembly of backlight monitoring for high-speed transfer, to overcome the problems referred to above.
Summary of the invention
The object of the invention is to the defect overcoming prior art, provide a kind of with backlight monitoring for the optical assembly of high-speed transfer, can solve in prior art and can not monitor Output optical power at any time, thus Real-time Feedback regulates the problem of laser threshold current.
The present invention is achieved in that
The invention provides a kind of with the optical assembly of backlight monitoring for high-speed transfer, comprise VCSEL laser, incident collimating lens, lens matrix, diaphragm, outgoing condenser lens and backlight monitoring lens; Described incident collimating lens and described backlight monitoring lens are arranged at the same side of described lens matrix, and described outgoing condenser lens is arranged at the opposite side of described lens matrix; Described lens matrix is provided with one first light beam steering face and one second light beam steering face, and described diaphragm is located on described first light beam steering face, the film plating layer dimidiation part of described diaphragm, and its first half is anti-reflection film, and the latter half is energy spectro-film; Be incident to described diaphragm from the light of described VCSEL laser emitting through described incident collimating lens, part light is penetrated by described outgoing condenser lens after the energy spectro-film reflection of described diaphragm, another part light enters diaphragm matrix through the energy spectro-film refraction of described diaphragm, be incident on the second light beam steering face of described lens matrix after another surperficial total reflection of diaphragm, and penetrate by monitoring lens by described backlight after described second light beam steering face total reflection.
Further, described first light beam steering face and described second light beam steering face are that 90 ° of angles are arranged.
Further, the light through described incident collimating lens incidence is mutually vertical with the light being incident to described outgoing condenser lens.
Further, through described incident collimating lens incidence light be incident to the light that described backlight monitors lens and be parallel to each other.
Further, be incident to the energy spectro-film of described diaphragm through described incident collimating lens from the light of described VCSEL laser emitting, a part of light reflects through described energy spectro-film, and directly by described outgoing condenser lens injection; Energy spectro-film described in the direct transmission of another part light, and be incident to described second light beam steering face through described anti-reflection film, penetrate by monitoring lens by described backlight after described second light beam steering face reflection.
Further, be incident to the energy spectro-film of described diaphragm through described incident collimating lens from the light of described VCSEL laser emitting, part light reflexes to described second light beam steering face through described energy spectro-film, and penetrates by monitoring lens by described backlight after described second light beam steering face reflection; Energy spectro-film described in the direct transmission of another part light, and penetrated by described anti-reflection film, directly by described outgoing condenser lens injection.
Further, the optical assembly that described band backlight monitoring is used for high-speed transfer is applicable to single-channel data transfers or multichannel array transfer of data.
The present invention has following beneficial effect:
Be incident to described diaphragm from the light of described VCSEL laser emitting through described incident collimating lens, part light is penetrated by described outgoing condenser lens after the energy spectro-film reflection of described diaphragm, another part light enters diaphragm matrix through the energy spectro-film refraction of described diaphragm, be incident to after another surperficial total reflection of diaphragm on the second light beam steering face of described lens matrix, and penetrate by monitoring lens by described backlight after described second light beam steering face total reflection, thus realize backlight monitoring.Described band backlight monitoring is passed through to be provided with energy spectro-film on first light path turnover face for the optical assembly of high-speed transfer, not only solve in prior art and can not monitor Output optical power at any time, thus Real-time Feedback regulates the problem of laser threshold current, and lens matrix structure is comparatively simplified, facilitate die sinking and assembling.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The band backlight monitoring that Fig. 1 provides for the embodiment of the present invention is for the structural representation of the optical assembly of high-speed transfer;
The band backlight monitoring that Fig. 2 provides for the embodiment of the present invention is for the structural representation of another embodiment of the optical assembly of high-speed transfer;
The structural representation of the diaphragm that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of protection of the invention.
As Fig. 1 to Fig. 3, the embodiment of the present invention provides a kind of with the optical assembly of backlight monitoring for high-speed transfer, comprises VCSEL laser, incident collimating lens 1, lens matrix 2, diaphragm 3, outgoing condenser lens 4 and backlight monitoring lens 5.
As Fig. 1 and Fig. 3, described incident collimating lens 1 and described backlight monitoring lens 5 are arranged at the same side of described lens matrix 2, and described outgoing condenser lens 4 is arranged at the opposite side of described lens matrix 2.Described lens matrix 2 is provided with one first light beam steering face 6 and one second light beam steering face 7, and described first light beam steering face 6 is arranged in 90 ° of angles with described second light beam steering face 7.Described diaphragm 3 is located on described first light beam steering face 6, the film plating layer dimidiation part of described diaphragm 3, and its first half is anti-reflection film 32, and the latter half is energy spectro-film 31.Described energy spectro-film 31 can realize light path light splitting; Described anti-reflection film 32 can reduce the stray light in energy loss and light path.
As Fig. 1, be incident to described diaphragm 3 from the light of described VCSEL laser emitting through described incident collimating lens 1, part light is penetrated by described outgoing condenser lens 4 after the energy spectro-film 31 of described diaphragm 3 reflects, another part light enters diaphragm matrix through the energy spectro-film refraction of described diaphragm 3, be incident on the second light beam steering face 7 of described lens matrix 1 after another surperficial total reflection of diaphragm, and penetrate by monitoring lens 5 by described backlight after described second light beam steering face 7 total reflection.Light through the incidence of described incident collimating lens 1 is mutually vertical with the light being incident to described outgoing condenser lens 4; Through the incidence of described incident collimating lens 1 light be incident to the light that described backlight monitors lens 5 and be parallel to each other.
The optical assembly that described band backlight monitoring is used for high-speed transfer is made up of Optical Transmit Unit, backlight monitoring unit and light receiving unit, and described Optical Transmit Unit comprises according to the described VCSEL laser of light path design, described incident collimating lens 1, described lens matrix 2, described diaphragm 3 and described outgoing condenser lens 4; Described backlight monitoring unit comprises according to the described VCSEL laser of light path design, described incident collimating lens 1, described lens matrix 2, described diaphragm 3 and described backlight monitoring lens 5; Described light receiving unit comprises according to the described incident collimating lens 1 of light path design, described lens matrix 2 and described outgoing condenser lens 4.
Wherein, described Optical Transmit Unit and backlight monitoring unit adopt same described diaphragm 3 to realize the light splitting of light path, and a part of light energy enters Optical Transmit Unit, another part light energy entry of backlight monitoring unit.The film aspect of described diaphragm 3 and the described first light beam steering face 6 of lens matrix 2 bond, and realize light splitting function.
As Fig. 1, in this preferred embodiment, be incident to the energy spectro-film 31 of described diaphragm 3 through described incident collimating lens 1 from the light of described VCSEL laser emitting, a part of light reflects through described energy spectro-film 31, and is directly penetrated by described outgoing condenser lens 4; Energy spectro-film 31 described in the direct transmission of another part light, and be incident to described second light beam steering face 7 through described anti-reflection film 32, monitor lens 5 by described backlight after being reflected by described second light beam steering face 7 and penetrate.
As Fig. 1 and Fig. 3, the optical assembly that described band backlight monitoring is used for high-speed transfer is applicable to single-channel data transfers, is also applicable to multichannel array transfer of data.And this optical assembly can be produced on same lens arra.For four-way light transmitting-receiving subassembly, 850nm VCSEL laser adopts four road array formats to arrange, and with identical spacing Emission Lasers.Four road light beams optical beam transformation after incident collimating lens 1 is the four equally spaced collimate in parallel light in road.This four roads light beam is again through the first light beam steering face 6 of lens matrix 2 and the adhesive surface of described diaphragm 3, and each road light of this four roads light is all divided into reverberation and transmitted light two parts.Four road reverberation by outgoing condenser lens 4, make four route parallel beams be focused to four equidistant little luminous points, are finally received by multimode fiber and transmit after the turnover of 90 degree of light paths.It is inner that four road transmitted lights incide diaphragm 3, light beam is made again through the adhesive surface of diaphragm 3 with the first light beam steering face 6 of lens matrix 2 again through the total reflection of diaphragm 3 upper surface, then four route parallel beams make light beam generation total reflection again through the second light beam steering face 7 of lens matrix 2, and by backlight monitoring lens 5, four bundle monitoring collimated light beams are focused on the PD array of four backlights receptions.Receiving element adopts the four roads 850nm multimode fiber that walks abreast to send light beam, four road optical beam transformations are made to be the four equidistant collimated light beams in tunnel through incident collimating lens 1, again through lens matrix 2 first light beam steering face, make four bundle receiving beam total reflections, then make four bundles receive collimated light beam by outgoing condenser lens 4 array and focus on four reception PD arrays.
As Fig. 1 and 3, described diaphragm 3 is divided into two kinds of optical thin films with the adhesive surface thin layer in lens matrix 2 first light beam steering face on space surface position, one is that light energy spectro-film 31 realizes light path light splitting, and the position of its energy spectro-film 31 is in the Lower Half of adhesive surface; Another kind is anti-reflection film 32, and for reducing the stray light in energy loss and light path, and anti-reflection film 32 is positioned at the first half of adhesive surface.Described diaphragm 3 can adjust the energy Ratios of reflection and transmission flexibly, for meeting any assembly about transmitting terminal and the requirement of monitoring client energy Ratios.
As shown in Figure 2, for the monitoring of described band backlight is used for the another kind of structure of the optical assembly of high-speed transfer, with the first structure unlike, it is by the reflected beam portion entry of backlight monitoring unit of diaphragm 3, and transmitted light part enters Optical Transmit Unit.Be incident to the energy spectro-film 31 of described diaphragm 3 through described incident collimating lens 1 from the light of described VCSEL laser emitting, part light reflexes to described second light beam steering face 7 through described energy spectro-film 31, and is penetrated by described backlight monitoring lens 5 after being reflected by described second light beam steering face 7; Energy spectro-film 31 described in the direct transmission of another part light, and penetrated by described anti-reflection film 32, directly penetrated by described outgoing condenser lens 4.
Described band backlight monitoring is passed through to be provided with energy spectro-film on first light path turnover face for the optical assembly of high-speed transfer, not only solve in prior art and can not monitor Output optical power at any time, thus Real-time Feedback regulates the problem of laser threshold current, and lens matrix structure is comparatively simplified, facilitate die sinking and assembling.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. monitor the optical assembly for high-speed transfer with backlight, it is characterized in that, comprise VCSEL laser, incident collimating lens, lens matrix, diaphragm, outgoing condenser lens and backlight monitoring lens;
Described incident collimating lens and described backlight monitoring lens are arranged at the same side of described lens matrix, and described outgoing condenser lens is arranged at the opposite side of described lens matrix;
Described lens matrix is provided with one first light beam steering face and one second light beam steering face, and described diaphragm is located on described first light beam steering face, the film plating layer dimidiation part of described diaphragm, and its first half is anti-reflection film, and the latter half is energy spectro-film;
Be incident to described diaphragm from the light of described VCSEL laser emitting through described incident collimating lens, part light is penetrated by described outgoing condenser lens after the energy spectro-film reflection of described diaphragm, another part light enters diaphragm matrix through the energy spectro-film refraction of described diaphragm, be incident on the second light beam steering face of described lens matrix after another surperficial total reflection of diaphragm, and penetrate by monitoring lens by described backlight after described second light beam steering face total reflection.
2. band backlight as claimed in claim 1 monitoring is used for the optical assembly of high-speed transfer, it is characterized in that: described first light beam steering face and described second light beam steering face are that 90 ° of angles are arranged.
3. band backlight as claimed in claim 1 or 2 monitoring is used for the optical assembly of high-speed transfer, it is characterized in that: the light through described incident collimating lens incidence is mutually vertical with the light being incident to described outgoing condenser lens.
4. band backlight as claimed in claim 1 or 2 monitoring is used for the optical assembly of high-speed transfer, it is characterized in that: the light through described incident collimating lens incidence is parallel to each other with the light being incident to described backlight and monitoring lens.
5. band backlight as claimed in claim 1 monitoring is used for the optical assembly of high-speed transfer, it is characterized in that: the energy spectro-film being incident to described diaphragm from the light of described VCSEL laser emitting through described incident collimating lens, part light reflects through described energy spectro-film, and directly by described outgoing condenser lens injection; Energy spectro-film described in the direct transmission of another part light, and be incident to described second light beam steering face through described anti-reflection film, penetrate by monitoring lens by described backlight after described second light beam steering face reflection.
6. band backlight as claimed in claim 1 monitoring is used for the optical assembly of high-speed transfer, it is characterized in that: the energy spectro-film being incident to described diaphragm from the light of described VCSEL laser emitting through described incident collimating lens, part light reflexes to described second light beam steering face through described energy spectro-film, and penetrates by monitoring lens by described backlight after described second light beam steering face reflection; Energy spectro-film described in the direct transmission of another part light, and penetrated by described anti-reflection film, directly by described outgoing condenser lens injection.
7. band backlight as claimed in claim 1 monitoring is used for the optical assembly of high-speed transfer, it is characterized in that: the optical assembly that described band backlight monitoring is used for high-speed transfer is applicable to single-channel data transfers or multichannel array transfer of data.
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| CN201410759532.3A CN104577708B (en) | 2014-12-12 | 2014-12-12 | The optical assembly for high-speed transfer is monitored with backlight |
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| CN201410759532.3A CN104577708B (en) | 2014-12-12 | 2014-12-12 | The optical assembly for high-speed transfer is monitored with backlight |
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| CN104577708A true CN104577708A (en) | 2015-04-29 |
| CN104577708B CN104577708B (en) | 2017-06-30 |
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| WO2020019327A1 (en) * | 2018-07-27 | 2020-01-30 | 华为技术有限公司 | Optical time-domain reflectometer, and optical assembly having optical time-domain reflection function |
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