CN203385903U - Optical transmitting and receiving assembly for 40 G - Google Patents
Optical transmitting and receiving assembly for 40 G Download PDFInfo
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- CN203385903U CN203385903U CN201320518208.3U CN201320518208U CN203385903U CN 203385903 U CN203385903 U CN 203385903U CN 201320518208 U CN201320518208 U CN 201320518208U CN 203385903 U CN203385903 U CN 203385903U
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- diaphragm
- light
- wavelength division
- division multiplexer
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Abstract
The utility model relates to the technical field of optical communication and discloses an optical transmitting and receiving assembly for 40 G. The assembly comprises an optical transmitting unit and an optical receiving unit. The optical transmitting unit comprises a light emitting LD array, a microlens array, a wavelength division multiplexer, and an optical fiber collimator, which are arranged along an optical path. The optical receiving unit comprises an optical fiber collimator, a wavelength division multiplexer, a microlens array, and a light receiving PD array, which are arranged along an optical path. Each of the wavelength division multiplexers in the optical transmitting unit and the optical receiving unit is composed of multiple films having different reflection and transmission spectrums. The assembly employs the wavelength division multiplexers of free space structures and the films of the wavelength division multiplexers can be adjusted and optimized flexibly, so that the transmission loss caused by wavelength division multiplexing and de-multiplexing is reduced, and the low power consumption requirement of the optical transmitting and receiving assembly is easy to realize.
Description
Technical field
The utility model relates to the optical communication technique field, relates in particular to a kind of transmitting-receiving subassembly of the light for 40G.
Background technology
The high speed optical communication module presents miniaturization, low-power consumption, hot plug, the characteristics such as multidiameter delay work, along with the continuous dilatation of optical communication transferring content, transfer rate and shared passage constantly increase, in order to solve the problem occurred thereupon, comparatively popular way is to utilize fiber waveguide device to make the needed active and passive device of multi-path light communication, yet there is larger loss in the waveguide component that the problem of its existence is wavelength-division multiplex, is unfavorable for realizing the requirement of optical transceiver module low-power consumption.
Summary of the invention
The purpose of this utility model is to propose a kind of transmitting-receiving subassembly of the light for 40G, adopts the wavelength division multiplexer of free-space structure, can adjust flexibly the diaphragm of optimizing wavelength division multiplexer, has reduced the loss of wavelength-division multiplex demultiplexing.
For achieving the above object, the technical scheme the utility model proposes is: a kind of transmitting-receiving subassembly of the light for 40G, comprise Optical Transmit Unit and light receiving unit, Optical Transmit Unit comprises luminous LD array, microlens array, wavelength division multiplexer and the optical fiber collimator arranged according to light path; Light receiving unit comprises optical fiber collimator, wavelength division multiplexer, microlens array and the light-receiving PD array arranged according to light path; Wavelength division multiplexer in described Optical Transmit Unit and light receiving unit is comprised of a plurality of diaphragms with different reflection and transmission spectrums.
Further, described wavelength division multiplexer comprises four wavelength-division multiplex demultiplexing passages, and wavelength is respectively λ 1, λ 2, λ 3, the λ 4 that meets the CWDM regulation.
Further, described wavelength division multiplexer comprises five reflection and transmission diaphragms, be respectively diaphragm F1, diaphragm F2, diaphragm F3, diaphragm F4, diaphragm F5, wherein diaphragm F1-F4 lays respectively on λ 1-λ 4 passages, to λ 1-λ 4 transmissions or to reflex to diaphragm F5 upper, λ 1-λ 4 is combined into a branch of at diaphragm F5 respectively; Or the incident light of a branch of λ of comprising 1-λ 4 is decomposed into the four bundle beamlets of λ 1-λ 4 through diaphragm F5-F1 transmission or reflection.
Further, described diaphragm F1 and F4 are the total reflection diaphragm, and diaphragm F2 is to other wavelength reflections of λ 2 transmissions, and diaphragm F3 is to λ 3 other wave plate transmissions of reflection, and diaphragm F5 is to λ 1 other wavelength transmissions of reflection; During as the Optical Transmit Unit wavelength division multiplexer, λ 1 reflexes to F5 through F1, and by F5 reflection output; λ 2 is through F2 and F5 transmission output; λ 3 reflexes to F2 through F3, is reflexed to F5 by F2 again, through the F5 transmission, exports; λ 4 reflexes to F3 through F4, through F3, is transmitted into and is mapped to F2, by F2, is reflexed to F5, through the F5 transmission, exports; During as the light receiving unit wavelength division multiplexer, light path is contrary.
Further, described wavelength division multiplexer comprises two diaphragms, two logical light faces of diaphragm one, and the one side plating is the rete to λ 3 and λ 4 reflections to λ 1 and λ 2 transmissions, the another side plating total reflection film; Two logical light faces of diaphragm two, the one side plating is the rete to λ 2 and λ 4 reflections to the transmission of λ 1 and λ 3, the another side plating total reflection film; During as the light receiving unit wavelength division multiplexer, the Shu Guangjing diaphragm one that closes of λ 1-λ 4 is divided into and comprises λ 1, λ 2 and the two parallel beamlets that comprise λ 3, λ 4, two parallel beamlets, through diaphragm two, further are divided into Siping City's row beamlet by λ 1, λ 2 and λ 3, λ 4; During as the Optical Transmit Unit wavelength division multiplexer, light path is contrary.
Further, luminous LD array, microlens array, wavelength division multiplexer and the optical fiber collimator of described Optical Transmit Unit, and the optical fiber collimator of light receiving unit, wavelength division multiplexer, microlens array and light-receiving PD array, all be arranged on a substrate.
Further, the lens of described microlens array are C lens, non-spherical lens or globe lens.
The beneficial effects of the utility model are: adopt the wavelength division multiplexer of free-space structure, can adjust flexibly the diaphragm of optimizing wavelength division multiplexer, reduced the loss of wavelength-division multiplex demultiplexing, be easy to realize the requirement of optical transceiver module low-power consumption.
The accompanying drawing explanation
The WDM structure one diaphragm group schematic diagram that Fig. 1 is the utility model transmitting-receiving subassembly;
WDM structure one principle schematic that Fig. 2 is the utility model transmitting-receiving subassembly;
The WDM structure two diaphragm group schematic diagram that Fig. 3 is the utility model transmitting-receiving subassembly;
WDM structure two principle schematic that Fig. 4 is the utility model transmitting-receiving subassembly.
Reference numeral: 1, reflection and transmission diaphragm; 2, diaphragm one; 3, diaphragm two.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
The utility model, for the light transmitting-receiving subassembly of 40G, comprises Optical Transmit Unit and light receiving unit, and Optical Transmit Unit comprises luminous LD array, microlens array, wavelength division multiplexer and the optical fiber collimator arranged according to light path; Light receiving unit comprises optical fiber collimator, wavelength division multiplexer, microlens array and the light-receiving PD array arranged according to light path; Wavelength division multiplexer in Optical Transmit Unit and light receiving unit is comprised of a plurality of diaphragms with different reflection and transmission spectrums, functional requirement according to Optical Transmit Unit and light receiving unit, by the film system of selection diaphragm and the locus of diaphragm, the spatial beam that meets the requirement of wavelength-division multiplex wavelength is closed to the collimate in parallel light beam of restrainting or being decomposed into the multichannel different wave length.Adopt the wavelength division multiplexer of free-space structure, can adjust flexibly the diaphragm of optimizing wavelength division multiplexer, reduced the loss of wavelength-division multiplex demultiplexing, be easy to realize the requirement of optical transceiver module low-power consumption.
The four-way light transmitting-receiving subassembly of take is example, luminous LD array adopts No. four semiconductor lasers to be arranged side by side, four road semiconductor laser wavelengths are respectively λ 1, λ 2, λ 3, λ 4, meet the CWDM regulation, four light beams are after the microlens array optical beam transformation, incide wavelength division multiplexer with the equidistant collimate in parallel light side by side of four bundles, the adjacent beams Center Gap is L, is combined into light beam and is exported by optical fiber collimator after wavelength division multiplexer.Downlink optical signal incides wavelength division multiplexer with a branch of collimated light after the optical fiber collimator input of light receiving unit, through the wavelength division multiplexer demultiplexing, be four bundles collimate in parallel light side by side, and by microlens array, four bundle collimate in parallel light are distinguished to optical beam transformations, focus on light-receiving PD array.
As illustrated in fig. 1 and 2, a kind of structure of the wavelength division multiplexer adopted for this four-way light transmitting-receiving subassembly, comprise five reflection and transmission diaphragms, be respectively diaphragm F1, diaphragm F2, diaphragm F3, diaphragm F4, diaphragm F5, wherein diaphragm F1-F4 lays respectively on λ 1-λ 4 passages, to λ 1-λ 4 transmissions or to reflex to diaphragm F5 upper, λ 1-λ 4 is combined into a branch of at diaphragm F5 respectively; Or the incident light of a branch of λ of comprising 1-λ 4 is decomposed into the four bundle beamlets of λ 1-λ 4 through diaphragm F5-F1 transmission or reflection.Wherein, diaphragm F1 and F4 are the total reflection diaphragm, and diaphragm F2 is to other wavelength reflections of λ 2 transmissions, and diaphragm F3 is to λ 3 other wave plate transmissions of reflection, and diaphragm F5 is to λ 1 other wavelength transmissions of reflection; During as the Optical Transmit Unit wavelength division multiplexer, λ 1 reflexes to F5 through F1, and by F5 reflection output; λ 2 is through F2 and F5 transmission output; λ 3 reflexes to F2 through F3, is reflexed to F5 by F2 again, through the F5 transmission, exports; λ 4 reflexes to F3 through F4, through F3, is transmitted into and is mapped to F2, by F2, is reflexed to F5, through the F5 transmission, exports.Four bundle collimate in parallel light beam centers are spaced apart L, incide the reflection and transmission diaphragm group that free space is put, and the distance between the diaphragm group meets L1=L/tan (2 θ) relation, as the incident angle of typical CWDM wave band diaphragm is 8 ~ 13 degree.From the above-mentioned relation formula, along with the increase of incident angle, in the situation that keep lateral separation L1 constant, need to strengthen beam center interval L, vice versa.Wherein the size of reflection and transmission diaphragm depends on the size with a tight waist of incident light, and rule of thumb, the width of reflection and transmission diaphragm is preferably 3 ~ 4 times of beam waist size.Because light path is reversible, as the light receiving unit wavelength division multiplexer time, its light path is contrary.In free-space structure, the selection of reflection and transmission diaphragm type can distribute and adjusted and optimize based on lambda1-wavelength, and does not need the one-piece construction correct, has increased the applicability of whole multiplex/demultiplex device.
As shown in Figures 3 and 4, the another kind of structure of the wavelength division multiplexer adopted for this four-way light transmitting-receiving subassembly, comprise the parallel diaphragm that two thickness are different, before and after two parallel diaphragms, logical light mask has different Transflective characteristics, incident light, after the reflection of logical light face before and after diaphragm, will spatially be realized separating.Preferably, two logical light faces of diaphragm one, the one side plating is the rete Film1 to λ 3 and λ 4 reflections to λ 1 and λ 2 transmissions, another side plating total reflection film Film2; Two logical light faces of diaphragm two, the one side plating is the rete Film3 to λ 2 and λ 4 reflections to the transmission of λ 1 and λ 3, another side plating total reflection film Film4.During as the light receiving unit wavelength division multiplexer, the Shu Guangjing diaphragm one that closes of λ 1-λ 4 is divided into and comprises λ 1, λ 2 and the two parallel beamlets that comprise λ 3, λ 4, two parallel beamlets, through diaphragm two, further are divided into Siping City's row beamlet by λ 1, λ 2 and λ 3, λ 4.Due to the reciprocity principle of light path, during as the Optical Transmit Unit wavelength division multiplexer, light path is contrary, realizes the bundle that closes of different wave length light beam.As shown in Figure 4, after this structure beam splitting, the interval △ h of two bundle directional lights depend on the angle α of thickness h, incident light and diaphragm normal of diaphragm and the Refractive Index of Material n of diaphragm, have relational expression:
(n
2-sin
2α) △ h
2=4h
2cos
2α sin
2α, from this relational expression, the spacing of two parallel beams and diaphragm thickness relation in direct ratio, can adjust beam spacing flexibly by the thickness h that changes diaphragm.
This light transmitting-receiving subassembly structure, luminous LD array, microlens array, wavelength division multiplexer and the optical fiber collimator of Optical Transmit Unit, and the optical fiber collimator of light receiving unit, wavelength division multiplexer, microlens array and light-receiving PD array, all be arranged on a substrate, form the Free Space Optics structure, can adjust flexibly the diaphragm of optimizing wavelength division multiplexer, reduce the loss of wavelength-division multiplex demultiplexing, be easy to realize the requirement of optical transceiver module low-power consumption.Wherein, the lens of microlens array are C lens, non-spherical lens or globe lens, corresponding one by one with the unit of luminous LD array or light-receiving PD array.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; the various variations of in the form and details the utility model being made, be protection domain of the present utility model.
Claims (7)
1. the transmitting-receiving subassembly of the light for 40G, comprise Optical Transmit Unit and light receiving unit, and Optical Transmit Unit comprises luminous LD array, microlens array, wavelength division multiplexer and the optical fiber collimator arranged according to light path; Light receiving unit comprises optical fiber collimator, wavelength division multiplexer, microlens array and the light-receiving PD array arranged according to light path; It is characterized in that: the wavelength division multiplexer in described Optical Transmit Unit and light receiving unit is comprised of a plurality of diaphragms with different reflection and transmission spectrums.
2. as claimed in claim 1 for the light transmitting-receiving subassembly of 40G, it is characterized in that: described wavelength division multiplexer comprises four wavelength-division multiplex demultiplexing passages, and wavelength is respectively λ 1, λ 2, λ 3, the λ 4 that meets the CWDM regulation.
3. as claimed in claim 2 for the light transmitting-receiving subassembly of 40G, it is characterized in that: described wavelength division multiplexer comprises five reflection and transmission diaphragms, be respectively diaphragm F1, diaphragm F2, diaphragm F3, diaphragm F4, diaphragm F5, wherein diaphragm F1-F4 lays respectively on λ 1-λ 4 passages, to λ 1-λ 4 transmissions or to reflex to diaphragm F5 upper, λ 1-λ 4 is combined into a branch of at diaphragm F5 respectively; Or the incident light of a branch of λ of comprising 1-λ 4 is decomposed into the four bundle beamlets of λ 1-λ 4 through diaphragm F5-F1 transmission or reflection.
4. as claimed in claim 3 for the light transmitting-receiving subassembly of 40G, it is characterized in that: described diaphragm F1 and F4 are the total reflection diaphragm, diaphragm F2 is to other wavelength reflections of λ 2 transmissions, and diaphragm F3 is to λ 3 other wave plate transmissions of reflection, and diaphragm F5 is to λ 1 other wavelength transmissions of reflection; During as the Optical Transmit Unit wavelength division multiplexer, λ 1 reflexes to F5 through F1, and by F5 reflection output; λ 2 is through F2 and F5 transmission output; λ 3 reflexes to F2 through F3, is reflexed to F5 by F2 again, through the F5 transmission, exports; λ 4 reflexes to F3 through F4, through F3, is transmitted into and is mapped to F2, by F2, is reflexed to F5, through the F5 transmission, exports; During as the light receiving unit wavelength division multiplexer, light path is contrary.
5. as claimed in claim 2 for the light transmitting-receiving subassembly of 40G, it is characterized in that: described wavelength division multiplexer comprises two diaphragms, two logical light faces of diaphragm one, and the one side plating is the rete to λ 3 and λ 4 reflections to λ 1 and λ 2 transmissions, the another side plating total reflection film; Two logical light faces of diaphragm two, the one side plating is the rete to λ 2 and λ 4 reflections to the transmission of λ 1 and λ 3, the another side plating total reflection film; During as the light receiving unit wavelength division multiplexer, the Shu Guangjing diaphragm one that closes of λ 1-λ 4 is divided into and comprises λ 1, λ 2 and the two parallel beamlets that comprise λ 3, λ 4, two parallel beamlets, through diaphragm two, further are divided into Siping City's row beamlet by λ 1, λ 2 and λ 3, λ 4; During as the Optical Transmit Unit wavelength division multiplexer, light path is contrary.
As described in claim 1-5 any one for the light transmitting-receiving subassembly of 40G, it is characterized in that: luminous LD array, microlens array, wavelength division multiplexer and the optical fiber collimator of described Optical Transmit Unit, and the optical fiber collimator of light receiving unit, wavelength division multiplexer, microlens array and light-receiving PD array, all be arranged on a substrate.
As described in claim 1-5 any one for the light transmitting-receiving subassembly of 40G, it is characterized in that: the lens of described microlens array are C lens, non-spherical lens or globe lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320518208.3U CN203385903U (en) | 2013-08-23 | 2013-08-23 | Optical transmitting and receiving assembly for 40 G |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320518208.3U CN203385903U (en) | 2013-08-23 | 2013-08-23 | Optical transmitting and receiving assembly for 40 G |
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| CN203385903U true CN203385903U (en) | 2014-01-08 |
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| CN201320518208.3U Expired - Lifetime CN203385903U (en) | 2013-08-23 | 2013-08-23 | Optical transmitting and receiving assembly for 40 G |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717589A (en) * | 2016-04-25 | 2016-06-29 | 武汉光迅科技股份有限公司 | Single-light-port multi-path parallel light emission assembly |
| US9391709B2 (en) | 2014-05-28 | 2016-07-12 | Hitachi Metals, Ltd. | Optical transmitter module |
| CN109586790A (en) * | 2018-12-26 | 2019-04-05 | 杭州耀芯科技有限公司 | Communication terminal, communication device and communication system based on free space optical communication |
| CN109617612A (en) * | 2018-12-25 | 2019-04-12 | 杭州耀芯科技有限公司 | Optical signal aligned transmissions device, system and method in free space |
-
2013
- 2013-08-23 CN CN201320518208.3U patent/CN203385903U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9391709B2 (en) | 2014-05-28 | 2016-07-12 | Hitachi Metals, Ltd. | Optical transmitter module |
| CN105717589A (en) * | 2016-04-25 | 2016-06-29 | 武汉光迅科技股份有限公司 | Single-light-port multi-path parallel light emission assembly |
| CN109617612A (en) * | 2018-12-25 | 2019-04-12 | 杭州耀芯科技有限公司 | Optical signal aligned transmissions device, system and method in free space |
| CN109586790A (en) * | 2018-12-26 | 2019-04-05 | 杭州耀芯科技有限公司 | Communication terminal, communication device and communication system based on free space optical communication |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |
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| CX01 | Expiry of patent term |