CN204694885U - A kind of multi-wavelength assembly for optical-fibre communications - Google Patents

A kind of multi-wavelength assembly for optical-fibre communications Download PDF

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Publication number
CN204694885U
CN204694885U CN201520293566.8U CN201520293566U CN204694885U CN 204694885 U CN204694885 U CN 204694885U CN 201520293566 U CN201520293566 U CN 201520293566U CN 204694885 U CN204694885 U CN 204694885U
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China
Prior art keywords
laser
transmitting terminal
optically
coupled
optical filter
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Expired - Fee Related
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CN201520293566.8U
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Chinese (zh)
Inventor
游海斌
吴玉霞
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Foochow Hong Xu Science And Technology Ltd
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Foochow Hong Xu Science And Technology Ltd
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Abstract

The utility model discloses a kind of multi-wavelength assembly for optical-fibre communications, for the multiwavelength laser coupling in single fiber transmitting-receiving communication, assembly comprises emission part, acceptance division, optically-coupled portion and fiber port.Fiber port is provided with the collimation portion collimated laser.Emission part comprises the transmitting terminal of more than 1, and transmitting terminal comprises the laser chip and collimation lens set that generate laser; The laser chip of each transmitting terminal generates the wavelength difference of laser; Described collimation lens set is positioned at transmitting terminal light-emitting window place, and laser chip generates laser after collimation lens set convergence and collimation by light-emitting window normal sheaf optically-coupled portion.The utility model, by improving optical path component, makes the brightness of light emission part shoot laser in assembly, the depth of parallelism all has better guarantee, and optical path component is easy to encapsulation and regulates, and the coupling ability of optically-coupled assembly to multiwavelength laser is promoted.

Description

A kind of multi-wavelength assembly for optical-fibre communications
Technical field
The utility model relates to optical-fibre communications field, particularly a kind of multi-wavelength assembly for optical-fibre communications.
Background technology
Along with the application of fiber optic network is more and more universal, especially all over the world intelligent acess FTTH project is progressively implemented, and point-to-point data transmission, for the fiber resource that Appropriate application has been laid, also increasing for the demand of bi-directional single fiber component of multichannel transmitting-receiving communication can be realized through multiwavelength laser coupling in single fiber on market.And along with the propelling of unification of three nets, and the continuous popularization of fiber to the home network, market increases for the demand of single fiber three-way assembly thereupon, the single fiber three-way assembly that especially certain two wavelength interval is very narrow.
Bi-directional single fiber component is in the market all the light signal of very wide two wavelength in wavelength interval, and single fiber three-way need process the laser coupled of three wavelength simultaneously, single fiber three-way inside such as XGPON standard, wavelength to be processed is needed to be 1270nm, 1550nm and 1577nm, compares the 1310nm in original GPON standard, 1490nm and 1550nm, wavelength interval, from the narrowest original 60nm, becomes the narrowest 27nm.Actual transition band, from original 40nm, becomes 15nm, and corresponding technical difficulty is multiplied.
The light transmitting-receiving subassembly of existing a kind of conventional aggregation light beam coupling as shown in Figure 1, comprise transmitting terminal (110), the laser chip (1110) of transmitting terminal (110), positive lens (610), optical fiber end (210), receiving end (300), the opto-electronic receiver chip (320) of receiving end (300), positive lens (310), optical filter (410).The divergent beams light signal exported by optical fiber end (210) after filtration mating plate (410) reflection after, arrive positive lens (310), received by the opto-electronic receiver chip (320) of receiving end (300) after divergent beams are become converging beam by positive lens (310).The divergent beams light signal sent from the laser chip (1110) of transmitting terminal (110) becomes converging beam light signal after positive lens (610), and converging beam light signal is received by optical fiber end (210) after mating plate (410) transmission after filtration.
In such an embodiment, because optical filter is based on assembly of thin films principle of interference, refraction law and reflection law to be met simultaneously, and the reflection of light and refraction effect are different from the difference of incident angle and wavelength, in this structure, laser must be 45 ° of incident light splitting functions that well could play optical filter, realize the transmittance and reflectance of different wave length, if incident laser cannot keeping parallelism to guarantee the accurate of incident angle, the wavelength interval so transmitting and receiving end is just sufficiently wide, otherwise just easily make the light signal mixing different wave length in reflected light, transmission peak wavelength signal or reflection wavelength signal is caused effectively to separate.Certainly in this applications, scioptics change parallel beam into the light signal of transmission, light signal effectively can be separated.
The light transmitting-receiving subassembly structural representation of existing a kind of simple lens directional light coupling as shown in Figure 2, comprise transmitting terminal (1100), optical fiber end (2000) and receiving end (3000), transmitting terminal (1100) is built-in with laser chip (11100) and positive lens (6100), optical fiber end comprises optical fiber head (2100) and lens (2200), receiving end (3000) comprises opto-electronic receiver chip (3200), positive lens (3100), optical filter 41.The parallel beam light signal inputted by optical fiber end (2000) after filtration mating plate (4100) reflection after, arrive positive lens (3100), received by the opto-electronic receiver chip (3200) of receiving end (3000) after parallel beam is become converging beam by positive lens (3100).The divergent beams light signal sent from the laser chip (11100) of transmitting terminal (1100) becomes parallel beam light signal after positive lens (6100), and parallel beam light signal is received by optical fiber end (2000) after mating plate (4100) transmission after filtration.
But the coupling scheme of this simple lens directional light, due to the existence of spherical aberration, the optical property of rims of the lens is different from the optical property of lens center, make the distance adjustment between laser chip (11100) and positive lens (6100) too responsive, be difficult to debugging, Stability Analysis of Structures performance is not fine, when optical fiber component transport or use procedure in because of vibrations, temperature variation and the situation such as aging and when the relative distance between laser chip (11100) and positive lens (6100) is changed, be difficult to ensure from characteristics such as the depth of parallelisms of positive lens (6100) shoot laser by making, thus properties of product are worsened so that lost efficacy.
Summary of the invention
The utility model proposes a kind of multi-wavelength assembly for optical-fibre communications, by the improvement to optical path component, optimize brightness and the depth of parallelism of ballistic device shoot laser in coupling optical path, make the aberration of the directional light coupling process of laser and the degree of coupling better, light path is convenient to debugging and structural stability is better.
The utility model adopts following scheme.
For a multi-wavelength assembly for optical-fibre communications, for the multiwavelength laser coupling in single fiber transmitting-receiving communication, described assembly comprises emission part, acceptance division, optically-coupled portion and fiber port.
Described fiber port is provided with the collimation portion collimated laser.
Described emission part comprises the transmitting terminal of more than 1, and transmitting terminal comprises the laser chip and collimation lens set that generate laser; The laser chip of described each transmitting terminal generates the wavelength difference of laser; Described collimation lens set is positioned at transmitting terminal light-emitting window place, and laser chip generates laser after collimation lens set convergence and collimation by light-emitting window normal sheaf optically-coupled portion.
Described optically-coupled portion comprises the optical filter of more than 1, and optical filter is arranged in order in the direction of collimation of fiber port collimation portion, and the light reflection direction of its reflected waveband points to fiber port; The reflected waveband of each optical filter is different and do not overlap mutually.
When emission part one transmitting terminal send out optical maser wavelength in the reflected waveband of optically-coupled portion one optical filter time, this transmitting terminal is positioned at a side of this optical filter of optically-coupled portion, its Emission Lasers through this optical filter reflection laggard enter fiber port.
When transmitting terminal one transmitting terminal send out optical maser wavelength not in the reflected waveband of the arbitrary optical filter in optically-coupled portion, and time in the transmission wave band of all optical filters in optically-coupled portion, then this transmitting terminal is positioned in the direction of collimation of fiber port collimation portion, be positioned at rear, optically-coupled portion, its Emission Lasers through all filter transmission in optically-coupled portion laggard enter fiber port.
Described acceptance division comprises the receiving end of more than 1, built-in photoelectricity receiving chip, when the wavelength of fiber port collimation portion shoot laser is in the reflected waveband of optically-coupled portion one optical filter, the acceptance division receiving end corresponding with this wavelength is positioned at a side of this optical filter of optically-coupled portion, and fiber port collimation portion shoot laser enters receiving end after the reflection of optically-coupled portion optical filter.
The collimation lens set of described transmitting terminal is made up of positive lens and negative lens, and the laser that laser chip produces is incident in the central part of negative lens after positive lens converges, and transfers parallel light emergence to through negative lens.
Each optical filter is all installed on the pointing direction of fiber port, each optical filter determines its ordering by reflected waveband and transmission wave band, the principle of its arrangement precedence and setting angle is, the reflected light of the sensing fiber port that each transmitting terminal produces at its corresponding optical filter place, and each transmitting terminal is at the transmitted light of the sensing fiber port of its corresponding optical filter place generation, all can by the filter transmission on light direct of travel.
The utility model arranges collimation lens set in the light emission side of emission part laser chip, and collimation lens set is made up of positive lens and negative lens, laser chip sends laser after positive lens converges, parallel light emergence is transferred to again through negative lens, because the laser after positive lens converges concentrates the central part being incident in negative lens, and the optical property of lens center is comparatively balanced, the anaclasis error problem because lens spherical aberration causes can be eliminated preferably, make all there is good guarantee via the brightness of this collimation lens set shoot laser, the depth of parallelism.
Because laser chip has higher dust-proof degree and inert gas seal requirement usually, and coupling assembly described in the utility model is by setting up negative lens, when can realize component package, to the different demands of dust-proof degree, namely the higher encapsulation of dust-proof degree can be used between laser chip to positive lens to promote dust-proof degree and impermeability, between positive lens with negative lens, the relative low encapsulation of dust-proof degree then can be adopted with cost-saving, and can by the stability adopting different encapsulating structures to promote coupling fiber assembly overall package structure, make optical fiber component in transport and use not easily because of vibrations, temperature deformation and the factor such as aging damage its optical property.
Due in the utility model, chipless between positive lens and negative lens, makes the requirement of encapsulation herein to dust-proof degree relatively low, therefore can adopt the structure being convenient to light path debugging between positive lens and negative lens, make this structure be convenient to carry out the adjustment in light path.
Due to the laser that the utility model generates with positive lens and negative lens combined treatment laser chip, make the brightness of emission part shoot laser, the depth of parallelism all has good guarantee, laser can with higher brightness and incident angle directive optical filter more accurately, and optical filter is based on the refraction law of light and reflection law work, incident angle accurately can reduce the loss of specific wavelength laser at optical filter place, and when the different laser coupled that wavelength is close are a branch of directive optical filter, accurately incident angle can give full play to optical filter in light splitting design performance functionally, also the coating performance requirement to optical filter can be reduced to a certain extent, save the coating cost of optical filter.
Due in the utility model, the laser that laser chip generates is after positive lens converges, parallel light emergence is transferred to again from negative lens, this just makes the light beam of outgoing directional light comparatively thin and good brightness, thinner light beam is convenient to the design of high precision optical fiber component, is conducive to the optically-coupled realizing more multi-path laser light beam.
Because the brightness of the transmitting terminal shoot laser of this assembly, the depth of parallelism all have good guarantee, light beam is thinner simultaneously, when this just allows this modular construction to be applied to specific product, can design by the mode of long distance light path, the light path of long distance has enough spaces can hold more transmitting terminal, receiving end and optical filter, thus realizes the synthesis Sum decomposition of two tunnels, three tunnels, four tunnels or even ten road laser beams.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Accompanying drawing 1 is the light transmitting-receiving subassembly schematic diagram of existing a kind of conventional aggregation light beam coupling;
Accompanying drawing 2 is light transmitting-receiving subassembly structural representations of existing a kind of simple lens directional light coupling;
Accompanying drawing 3 is schematic diagram that assembly described in the utility model carries out optical signal transceiver simultaneously;
Accompanying drawing 4 is the schematic diagram sent after the light signal of assembly described in the utility model to three wavelength is coupled.
Embodiment
As shown in Figure 3, Figure 4, a kind of multi-wavelength assembly for optical-fibre communications, for the multiwavelength laser coupling in single fiber transmitting-receiving communication, described assembly comprises emission part, acceptance division, optically-coupled portion and fiber port 2.
Described fiber port 2 is provided with the collimation portion 22 collimated laser.
Described emission part comprises the transmitting terminal 11,12 and 13 of more than 1, and transmitting terminal 11 comprises the laser chip 111 and collimation lens set that generate laser; The laser chip of described each transmitting terminal generates the wavelength difference of laser; Described collimation lens set comprises positive lens 61 and negative lens 51, is positioned at transmitting terminal light-emitting window place, and laser chip 111 generates laser after collimation lens set convergence and collimation by light-emitting window normal sheaf optically-coupled portion.
Described optically-coupled portion comprises the optical filter 41 and 42 of more than 1, and optical filter 41,42 is arranged in order in the direction of collimation of fiber port collimation portion 22, and the light reflection direction of its reflected waveband points to fiber port 2; The reflected waveband of each optical filter 41,42 is different and do not overlap mutually.
When emission part one transmitting terminal 12 send out optical maser wavelength in the reflected waveband of optically-coupled portion one optical filter 41 time, this transmitting terminal is positioned at a side of this optical filter of optically-coupled portion, its Emission Lasers through this optical filter 41 reflect laggard enter fiber port 2.
When transmitting terminal one transmitting terminal 11 send out optical maser wavelength not in the reflected waveband of the arbitrary optical filter in optically-coupled portion, and time in the transmission wave band of all optical filters 41,42 in optically-coupled portion, then this transmitting terminal 11 is positioned in the direction of collimation of fiber port 2 collimation portion 22, be positioned at rear, optically-coupled portion, its Emission Lasers through all optical filters in optically-coupled portion 41,42 transmission laggard enter fiber port 2.
Described acceptance division comprises the receiving end 3 of more than 1, built-in photoelectricity receiving chip 32, when the wavelength of fiber port 2 collimation portion 22 shoot laser is in the reflected waveband of optically-coupled portion one optical filter 41, the acceptance division receiving end 3 corresponding with this wavelength is positioned at a side of this optical filter 41 of optically-coupled portion, and fiber port 2 collimation portion 22 shoot laser enters receiving end 3 after the reflection of optically-coupled portion optical filter 41.
The collimation lens set of described transmitting terminal is made up of positive lens 61 and negative lens 51, and the laser that laser chip 111 produces is incident in the central part of negative lens 51 after positive lens 61 converges, and transfers parallel light emergence to through negative lens 51.
Each optical filter is all installed on the pointing direction of fiber port 2, each optical filter determines its ordering by reflected waveband and transmission wave band, the principle of its arrangement precedence and setting angle is, the reflected light of the sensing fiber port that each transmitting terminal produces at its corresponding optical filter place, and each transmitting terminal is at the transmitted light of the sensing fiber port of its corresponding optical filter place generation, all can by the filter transmission on light direct of travel.
Embodiment 1:
While the utility model is used for light signal during transmitting-receiving, as shown in Figure 3, there is reception and the transmission of the light signal of different wave length at optical fiber end 2 place simultaneously.
The divergent beams light signal sent from transmitting terminal 11 laser chip 111 becomes converging beam light signal after positive lens 61, and converging beam light signal becomes parallel beam light signal after negative lens 51.Wavelength due to transmitting terminal 11 laser chip 111 Emission Lasers is positioned at the transmission wave band of optical filter 41, and therefore this parallel beam signal can through optical filter 41 transmission, and parallel beam light signal is received by optical fiber end 2 collimation portion after mating plate 41 transmission after filtration.
Wavelength due to optical fiber end 2 Emission Lasers is positioned at the reflected waveband of optical filter 41, therefore can be reflected by optical filter 41, the parallel beam light signal inputted by optical fiber end 2 collimation portion 22 is after mating plate 41 reflects after filtration, parallel beam light signal becomes converging beam light signal after positive lens 31, and the opto-electronic receiver chip 32 of converging beam optical signals receiving end 3 receives.
Embodiment 2:
When the coupling that the utility model is used for multiwavelength laser light signal sends, as shown in Figure 4, accept the laser signal input of multiple wavelength at optical fiber end 2 place simultaneously.
In this example, the laser signal of multiple wavelength is respectively from laser chip 111,121 and 131, wherein the optical maser wavelength of laser chip 111 is positioned at the transmission wave band of all optical filters 41,42 in optically-coupled portion, the optical maser wavelength of laser chip 121 is positioned at optical filter 41 reflected waveband in optically-coupled portion, and the wavelength of laser chip 131 Emission Lasers is positioned at the reflected waveband of optical filter 42 and the transmission wave band of optical filter 41.
The divergent beams light signal sent from transmitting terminal 11 laser chip 111 becomes converging beam light signal after positive lens 61, converging beam light signal becomes parallel beam light signal after negative lens 51, wavelength due to transmitting terminal 11 laser chip 111 Emission Lasers is positioned at the transmission wave band of all optical filters 41,42 in optically-coupled portion, therefore this parallel beam signal can pass through from all filter transmission in optically-coupled portion, and parallel beam light signal is received by optical fiber end 2 collimation portion after mating plate 42 and optical filter 41 transmission after filtration.
The divergent beams light signal sent from transmitting terminal 12 laser chip 121 becomes converging beam light signal after positive lens 62, converging beam light signal becomes parallel beam light signal after negative lens 52, wavelength due to transmitting terminal 12 laser chip 121 Emission Lasers is positioned at the reflected waveband of optical filter 41, therefore this parallel beam light signal can be reflected by optical filter 41, and parallel beam light signal after filtration mating plate 41 is received by optical fiber end 2 collimation portion after reflecting.
The divergent beams light signal sent from transmitting terminal 13 laser chip 131 becomes converging beam light signal after positive lens 63, converging beam light signal becomes parallel beam light signal after negative lens 53, wavelength due to transmitting terminal 13 laser chip 131 Emission Lasers is positioned at the reflected waveband of optical filter 42, therefore this parallel beam light signal can be reflected by optical filter 42, and parallel beam light signal after filtration mating plate 42 reflects rear directive optical filter 41; Wavelength due to transmitting terminal 13 laser chip 131 Emission Lasers is positioned at the transmission wave band of optical filter 41, and therefore this parallel beam light signal can by optical filter 41 transmission, and parallel beam light signal is received by optical fiber end 2 collimation portion after mating plate 41 transmission after filtration.

Claims (3)

1., for a multi-wavelength assembly for optical-fibre communications, for the multiwavelength laser coupling in optical fiber transceiving communication, it is characterized in that: described assembly comprises emission part, acceptance division, optically-coupled portion and fiber port;
Described fiber port is provided with the collimation portion (22) collimated laser;
Described emission part comprises the transmitting terminal of more than 1, and transmitting terminal comprises the laser chip and collimation lens set that generate laser; The laser chip of described each transmitting terminal generates the wavelength difference of laser; Described collimation lens set is positioned at transmitting terminal light-emitting window place, and laser chip generates laser after collimation lens set convergence and collimation by light-emitting window normal sheaf optically-coupled portion;
Described optically-coupled portion comprises the optical filter of more than 1, and optical filter is arranged in order in the direction of collimation of fiber port collimation portion (22), and the light reflection direction of its reflected waveband points to fiber port; The reflected waveband of each optical filter is different and do not overlap mutually;
When emission part one transmitting terminal (12) send out optical maser wavelength in the reflected waveband in optically-coupled portion one optical filter (41) time, this transmitting terminal (12) is positioned at a side in this optical filter of optically-coupled portion (41), its Emission Lasers through this optical filter (41) reflect laggard enter fiber port;
When transmitting terminal one transmitting terminal (11) send out optical maser wavelength not in the reflected waveband of the arbitrary optical filter in optically-coupled portion, and time in the transmission wave band of all optical filters in optically-coupled portion, then this transmitting terminal (11) is positioned in the direction of collimation of fiber port collimation portion (22), be positioned at rear, optically-coupled portion, its Emission Lasers through all filter transmission in optically-coupled portion laggard enter fiber port;
Described acceptance division comprises the receiving end of more than 1, built-in photoelectricity receiving chip, when the wavelength of fiber port collimation portion (22) shoot laser is in the reflected waveband in optically-coupled portion one optical filter (41), the acceptance division receiving end (3) corresponding with this wavelength is positioned at a side in this optical filter of optically-coupled portion (41), and fiber port collimation portion (22) shoot laser enters receiving end (3) after optically-coupled portion optical filter (41) reflection.
2. a kind of multi-wavelength assembly for optical-fibre communications according to claim 1, it is characterized in that: the collimation lens set of described transmitting terminal is made up of positive lens and negative lens, the laser that laser chip produces is incident in the central part of negative lens after positive lens converges, and transfers parallel light emergence to through negative lens.
3. a kind of multi-wavelength assembly for optical-fibre communications according to claim 1, it is characterized in that: each optical filter is all installed on the pointing direction of fiber port, each optical filter determines its ordering by reflected waveband and transmission wave band, the principle of its arrangement precedence and setting angle is, the reflected light of the sensing fiber port that each transmitting terminal produces at its corresponding optical filter place, and each transmitting terminal is at the transmitted light of the sensing fiber port of its corresponding optical filter place generation, all can by the filter transmission on light direct of travel.
CN201520293566.8U 2015-05-08 2015-05-08 A kind of multi-wavelength assembly for optical-fibre communications Expired - Fee Related CN204694885U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104808299A (en) * 2015-05-08 2015-07-29 福州宏旭科技有限公司 Multi-wavelength component for fiber optic communication
CN107479145A (en) * 2017-07-21 2017-12-15 成都聚芯光科通信设备有限责任公司 Beneficial to the optical transceiver module component for improving coupling efficiency

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104808299A (en) * 2015-05-08 2015-07-29 福州宏旭科技有限公司 Multi-wavelength component for fiber optic communication
CN107479145A (en) * 2017-07-21 2017-12-15 成都聚芯光科通信设备有限责任公司 Beneficial to the optical transceiver module component for improving coupling efficiency

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Granted publication date: 20151007

Termination date: 20200508