CN106160845B - A kind of transceiver of integrated optical time domain reflection backwards to detection function - Google Patents
A kind of transceiver of integrated optical time domain reflection backwards to detection function Download PDFInfo
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- CN106160845B CN106160845B CN201510146662.4A CN201510146662A CN106160845B CN 106160845 B CN106160845 B CN 106160845B CN 201510146662 A CN201510146662 A CN 201510146662A CN 106160845 B CN106160845 B CN 106160845B
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Abstract
The invention discloses a kind of integrated optical time domain reflections backwards to the transceiver of detection function, it is characterised in that: including signal transmitter unit, backwards to detecting signal unit, communication signal processing detection unit, optical circulator, 2 × 2 photoswitches, upper road optical fiber link, lower road optical fiber link；The signal transmitter unit includes laser and laser controller, described includes backwards to photodetector and backwards to signal processing unit backwards to detecting signal unit, and the communication signal processing unit includes communication signal photodetector and communication signal processing unit.Push-pull device of the integrated optical time domain reflection of the present invention backwards to detection function, have the beneficial effect that the present invention minimizes photoswitch, and signal is emitted, backwards to detection, backlight isolation, detection link switching is integrated into a miniaturized device/module, effectively reduce cost, and Insertion Loss is small, and temperature stability is good, keeps module lower to the power requirement of light source in the case where reaching same detection range.
Description
Technical field
The present invention relates to optical communication field more particularly to a kind of circulator and photoswitch are integrated into a small-sized encapsulated
In transceiver and realize Time Domain Reflectometry backwards to detection and positive communication a kind of integrated optical time domain reflection backwards to detection function can
Plug-in and pull-off device.
Background technique
The continuous expansion and the continuous improvement of rate of communication network primary transmission capacity are so that fiber optic communication becomes present information
The prevailing transmission means of network, in present optical communication network, such as wide area network (WAN), Metropolitan Area Network (MAN) (MAN), local area network (LAN)
The type of the required optical transceiver module as one of core opto-electronic device is more and more, it is desirable that and it is also higher and higher, it is complicated
Degree also develops at an amazing speed.Sharply increasing for optical transceiver module results in diversity, needs to continue to develop the relevant technologies
Meet such application demand.The new market demand is by OTDR(optical time domain reflectometer at present) technology is incorporated in optical transceiver module
Together, to reach miniaturization, the purpose of low-cost system.OTDR is the technology and equipment just to come out in 1976, it is one
Apply the optical detecting instrument on fiber optic network, for detection fiber loss characteristic and carry out the strong of defective space positioning
Means, main purpose are detection and positioning.The major advantage of optical time domain reflectometer is only can to detect into section from one end
The relevant parameter of optical cable, working principle are similar to radar.The characteristic of single-ended transmitting-receiving allows OTDR and the integrated of optical transceiver module to have
The operability of reality, and the existing OTDR equipment in market is prohibitively expensive that integrated OTDR is also allowed to be able to open up the sky of existence
Between.Optical transceiver module largely uses on the network node, and under the premise of not influencing existing transmission-receiving function, OTDR function is integrated
Enter, the spending of writing can be saved for network operator.OTDR function is integrated in pluggable module, and with one
The optical fiber link of module monitors Shang Lu and lower road, main bugbear are the optical circulator of miniaturization, and need switching monitoring channel
The miniaturization light of Shi Suoxu opens the light.In addition, to detect 100KM's or more since existing semiconductor laser power is not high
Optical fiber link needs to integrate these devices with low insertion loss.
Attached drawing 1 is that the SFP pluggable module of existing integrated OTDR function in the market realizes block diagram, positive outgoing therein with
It is divided backwards to detection with a light-splitting device.This scheme causes module laser signal energy at least to lose 3dB, backwards to inspection
Signal decaying 6dB is surveyed, detectable distance is caused to be less than 65KM.
In addition, digital photoswitch volume at present on the market is all larger (with reference to special for the solution of handoff links
Benefit number is the Chinese utility model patent of ZL200520077624.X, sees attached drawing 2, and 1-4 is optical fiber collimator, 5 is six in attached drawing 2
Angle prism, 6 be driving structure, 7 be shell), be not suitable for doing microminiature module integrated.In addition, analog photoswitch although have compared with
More solutions, but isolation/extinction ratio is not high, and needs accurate voltage or current control, it is easily affected by environment,
Higher cost.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes that a kind of be integrated together circulator and digital photoswitch can be collected with realization
At optical time domain reflection backwards to the transceiver of detection function；Photoswitch size therein is small, is easily integrated, convenient for production miniaturization mould
Block and device, and Insertion Loss is small, and temperature stability is good, makes module in the case where reaching same detection range to the power requirement of light source
It is lower.
In order to achieve the above objectives, technical solution provided by the invention are as follows: a kind of integrated optical time domain reflection is backwards to detection function
Transceiver, it is characterised in that: including signal transmitter unit, backwards to detecting signal unit, communication signal processing detection unit, light
Circulator, 2 × 2 photoswitches, upper road optical fiber link, lower road optical fiber link；
The signal transmitter unit includes laser and laser controller, and described includes carrying on the back backwards to detecting signal unit
To photodetector and backwards to signal processing unit, the communication signal processing detection unit includes communication signal photodetection
Device and communication signal processing unit；
The optical circulator includes three ports, wherein the first port connecting laser of optical circulator, third port
Connection is backwards to photodetector；2 × 2 photoswitches include the first signal input, the first signal output, second signal
Input port, second signal delivery outlet, the second port of the optical circulator connect the first signal input, the output of the first signal
Mouth connects upper road optical fiber link；Second signal input port connecting communication signal photodetector, under the connection of second signal delivery outlet
Road optical fiber link；The laser controller connecting laser；Backwards to signal processing unit connection backwards to photodetector；Communication
Signal processing unit connecting communication signal photodetector.
Further, 2 × 2 photoswitches include the first prism, the second prism and an optical path switch module, described
First prism, the second prism include the plane of incidence, exit facet and contact surface；Contact surface between first prism and the second prism is mutually flat
Row setting, the optical path switch module are a driving unit, and the driving unit can drive the contact surface of the first prism
And second prism contact surface between separate or closure.
Further, 2 × 2 photoswitches include the first prism, the second prism and an optical path switch module, described
First prism, the second prism include the plane of incidence, exit facet and contact surface；Contact surface between first prism and the second prism is mutually flat
Row setting, the optical path switch module are a changeable refractive index unit, and the changeable refractive index unit is set to the first prism
Contact surface and the second prism contact surface among.
Further, 2 × 2 photoswitches may be the digital photoswitch based on the variation of interfacial refraction rate
Further, the laser is fabry-Perot type laser or distributed feedback Bragg grating laser device.
Further, it is described backwards to photodetector or communication signal photodetector, be a photodiode.
Further, the driving unit is a piezoelectric ceramic actuator or ultrasound electric machine.
Further, the changeable refractive index unit is the fluid cartridge that a monocrystalline silicon or Micropump drive.
By adopting the above technical scheme, integrated optical time domain reflection of the present invention backwards to detection function push-pull device,
It has the beneficial effect that the present invention minimizes photoswitch, and signal is emitted, backwards to detecting, backlight isolation detects link
Switching is integrated into a miniaturized device/module, is had the advantage that
1) it is detected for communicating with optical fiber link using the same laser, saves the quantity of laser, reduce cost；
2) switch the characterisitic parameter on the detection optical fiber road link Zhong Shang Yu lower road using photoswitch, save backwards to detector
Quantity has been greatly reduced system cost；
3) low-loss optically circulator and photoswitch are used, the power loss of laser can be reduced, be conducive to detect longer
Optical fiber link；
4) sensitive detection parts backwards that the optical circulator of miniaturization, photoswitch, laser and photodiode integrate, so that
OTDR function is integrated into pluggable transceiver module and is possibly realized, and reduces the cost of the system integration.
Detailed description of the invention
Fig. 1 is push-pull device schematic diagram of the existing integrated optical time domain reflection backwards to detection function；
Fig. 2 is prior art optical switch device schematic diagram；
Fig. 3 is push-pull device embodiment schematic diagram of the integrated optical time domain reflection of the present invention backwards to detection function；
Fig. 4 is integrated form of the present invention backwards to detection device photoswitch implementation diagram one；
Fig. 5 is photoswitch reverse optical path schematic diagram shown in Fig. 4；
Fig. 6 is integrated form of the present invention backwards to detection device photoswitch implementation diagram two；
Fig. 7 is photoswitch reverse optical path schematic diagram shown in fig. 6；
Attached drawing mark: 101,2 × 2 photoswitch；102, optical circulator；103, laser；104, backwards to photodetector；
105, laser controller；106, backwards to signal processing unit；107, upper road optical fiber link；108, lower road optical fiber link；109, lead to
Interrogate signal photodetector；110, communication signal processing unit.111, the first prism；112, the second prism；113, driving unit；
114, the first prism incidence face；115, the first prism contact surface；116, the first prism exit facet；117, the second prism contact surface；
118, the second prism incidence face；119, the second prism exit facet；120, changeable refractive index unit.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention will be further described.
Integrated optical time domain reflection of the present invention backwards to detection function push-pull device as shown in figure 3, include signal
Transmitting unit, backwards detecting signal unit, communication signal processing detection unit, optical circulator 102,2 × 2 photoswitches 101, upper road
Optical fiber link 107, lower road optical fiber link 108；Signal transmitter unit includes laser 103 and laser controller 105, the back
It include backwards to photodetector 104 and backwards to signal processing unit 106 to detecting signal unit, the communication signal handles inspection
Surveying unit includes communication signal photodetector 109 and communication signal processing unit 110；Optical circulator 102 includes three ports,
The wherein first port connecting laser 103 of optical circulator 102, third port connection is backwards to photodetector 104；Described 2
× 2 photoswitches include the first signal input, the first signal output, second signal input port, second signal delivery outlet, described
The second port of optical circulator 102 connect the first signal input, the first signal output connects upper road optical fiber link 107；
Second signal input port connecting communication signal photodetector 109, second signal delivery outlet connect lower road optical fiber link 108；Institute
105 connecting laser 103 of laser controller stated；Backwards to the connection of signal processing unit 106 backwards to photodetector 104；Communication
110 connecting communication signal photodetector 109 of signal processing unit.
Specifically, push-pull device of the integrated optical time domain reflection of the present invention backwards to detection function, working condition is such as
It is lower described.
Its working condition 1 are as follows: laser 103 is controlled by laser controller 105, emits the laser of modulation, is swashed
Light passes through optical circulator 102, and into 2 × 2 photoswitches 101, controlling 2 × 2 photoswitches 101 makes laser signal from upper road optical fiber link
107 outputs；When laser signal is exported from upper road optical fiber link 107, the back-reflection/road scattering Guang Congshang optical fiber link 107 is anti-
To 2 × 2 photoswitches 101 are input to, optical circulator 102 is entered back into, is exported from the third port of optical circulator 102, into back
To photodetector 104, enters after being converted to electric signal backwards to signal processing unit 106, complete backwards to detection；Meanwhile under
The optical signal that road optical fiber link 108 inputs (can according to optical path through 2 × 2 photoswitch, 101 entry communication signal photodetector 109
Inverse principle, signal output can also be used as signal input), enter communication signal processing unit 110 after being converted to electric signal,
Carry out signal decoding.
Working condition 2 are as follows: by laser controller 105, laser 103 is controlled, emits the laser of modulation, laser
By optical circulator 102, into 2 × 2 photoswitches 101, controlling 2 × 2 photoswitches 101 makes laser signal from lower road optical fiber link
108 outputs.When laser signal is exported from lower road optical fiber link 108, the back-reflection/road scattering Guang Congxia optical fiber link 108 is anti-
To 2 × 2 photoswitches 101 are input to, optical circulator 102 is entered back into, is exported from the third port of optical circulator 102, into back
To photodetector 104, enters after being converted to electric signal backwards to signal processing unit 106, complete backwards to detection.Meanwhile from upper
Road optical fiber link 107 inputs the optical signal of (according to light path principle, signal output can also be used as signal input) through 2
101 entry communication signal photodetector 109 of × 2 photoswitch enters communication signal processing unit 110 after being converted to electric signal,
Signal decoding is carried out, this signal all the way can be not used in practical applications without impacting to other functions.
Specifically, the photoswitch of preferred Fig. 4, Fig. 6 structure of 2 × 2 photoswitch 101 of the present invention.
As shown in figure 4,2 × 2 photoswitches include the first prism 111, the second prism 112 and an optical path switch module, it is described
The first prism 111 including the first prism incidence face 114, the first prism exit facet 116 and the first prism contact surface 116；Second
Prism 112 includes the second prism incidence face 118, the second prism exit facet 119 and the second prism contact surface 117；And first prism
Contact surface 115 and the second prism contact surface 117 are arranged in parallel, and the optical path switch module is a driving unit 113, institute
The driving unit 113 stated, which can drive, to be separated or is closed between the first prism contact surface 115 and the second prism contact surface 117.
As shown in fig. 6,2 × 2 photoswitches use an alternate embodiment, the difference with Fig. 4, Fig. 5 is, by Fig. 4,
Driving unit 113 in 5 changes changeable refractive index unit 120 into, and changeable refractive index unit is set to the first prism contact surface 115
And second between prism contact surface 117, when needing to be totally reflected, by being by the adjustable refractive index of changeable refractive index unit
With the first prism, there are refringences for the second prism；When by the adjustable refractive index of changeable refractive index unit be and the first rib
When mirror, the second prism are equal there are refractive index, light beam can pass through the first prism contact surface 115 and the second prism contact surface 117,
Realize the switching of optical path.
Specifically, Fig. 4,2 × 2 photoswitch optical path switching modes shown in 5 are as follows:
Optical switch status 1: light is incident from the first prism incidence face 114, and the first prism contact surface 115 is entered after reflecting, the
One prism contact surface 115 and the second prism contact surface 117 separate (when can be set as driving unit 113 without driving), and light is in the first rib
115 face of mirror contact surface is totally reflected, and is emitted through the first prism exit facet 116.At the same time, another light beam enters from the second prism
It is incident to penetrate face 118, incident second prism contact surface 117, is totally reflected, then pass through in the second prism contact surface 117 after reflecting
The outgoing of second prism exit facet 119.
Optical switch status 2: light is incident from the first prism incidence face 114, the incident first prism contact surface 115 after reflecting,
First prism contact surface 115 and the second contact closure under the driving of driving unit 113 of prism contact surface 117, total reflection disappear,
Light is transmitted from the first prism contact surface 115, the second prism contact surface 117 and is incident on the second prism exit facet 119, is rolled over
It is exported after penetrating；At the same time, another light beam is incident from the second prism incidence face 118, and the contact of the second prism is incident on after reflecting
Face 117 contacts the 117, first prism contact surface 115 from the second prism respectively and passes through, is incident on the first prism exit facet 116, then
It is exported after refraction.
According to light path principle, in state 1, the first prism incidence face 114 of this photoswitch and the first prism are emitted
Face 116 exchanges, and same function also may be implemented in the second prism incidence face 118 and the exchange of the second prism exit facet 119.In state
When 2, the first prism incidence face 114 of this photoswitch and the second prism exit facet 119 are exchanged, the first prism exit facet 116 and the
Two prism incidence faces 118, which exchange, also may be implemented same function, as shown in Fig. 5.
Photoswitch optical path switching mode as shown in Figure 6, Figure 7, the difference with Fig. 4, Fig. 5 are, by the drive in Fig. 4,5
Moving cell 113 changes changeable refractive index unit 120 into, and changeable refractive index unit is set to the first prism contact surface 115 and second
Between prism contact surface 117, when needing to be totally reflected, by being and first by the adjustable refractive index of changeable refractive index unit
Prism, there are refringences for the second prism；When by the adjustable refractive index of changeable refractive index unit be and the first prism, second
When prism is equal there are refractive index, light beam can pass through the first prism contact surface 115 and the second prism contact surface 117, realize light
The switching on road.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, in the form and details to this hair
The bright various change made, is protection scope of the present invention.
Claims (8)
1. a kind of integrated optical time domain reflection is backwards to the transceiver of detection function, it is characterised in that: including signal transmitter unit, backwards
Detecting signal unit, communication signal processing detection unit, optical circulator, 2 × 2 photoswitches, upper road optical fiber link, lower road optical fiber chain
Road；
The signal transmitter unit includes laser and laser controller, and described includes light backwards backwards to detecting signal unit
Electric explorer and backwards to signal processing unit, the communication signal processing detection unit include communication signal photodetector and
Communication signal processing unit；
The optical circulator includes three ports, wherein the first port connecting laser of optical circulator, third port connection
Backwards to photodetector；2 × 2 photoswitches include the first signal input, the first signal output, second signal input
Mouth, second signal delivery outlet, the second port of the optical circulator connect the first signal input, and the first signal output connects
Connect road optical fiber link；Second signal input port connecting communication signal photodetector, second signal delivery outlet connect lower road light
Fine link；The laser controller connecting laser；Backwards to signal processing unit connection backwards to photodetector；Communication signal
Processing unit connecting communication signal photodetector.
2. a kind of integrated optical time domain reflection according to claim 1 is backwards to the transceiver of detection function, it is characterised in that: institute
2 × 2 photoswitches stated include the first prism, the second prism and an optical path switch module, first prism, the second prism packet
Include the plane of incidence, exit facet and contact surface；Contact surface between first prism and the second prism is arranged in parallel, and the optical path is cut
Changing unit is a driving unit, and the driving unit can drive between the contact surface of the first prism and the contact surface of the second prism
Separation or closure.
3. a kind of integrated optical time domain reflection according to claim 1 is backwards to the transceiver of detection function, it is characterised in that: institute
2 × 2 photoswitches stated include the first prism, the second prism and an optical path switch module, first prism, the second prism packet
Include the plane of incidence, exit facet and contact surface；Contact surface between first prism and the second prism is arranged in parallel, and the optical path is cut
Changing unit is a changeable refractive index unit, and the changeable refractive index unit is set to the contact surface and the second prism of the first prism
Among contact surface.
4. a kind of integrated optical time domain reflection according to claim 1 is backwards to the transceiver of detection function, it is characterised in that: institute
2 × 2 photoswitches stated are the digital photoswitch changed based on interfacial refraction rate.
5. transmitting-receiving of a kind of integrated optical time domain reflection described in -4 any claims backwards to detection function according to claim 1
Device, it is characterised in that: the laser is fabry-Perot type laser or distributed feedback Bragg grating laser device.
6. transmitting-receiving of a kind of integrated optical time domain reflection described in -4 any claims backwards to detection function according to claim 1
Device, it is characterised in that: it is described backwards to photodetector or communication signal photodetector be a photodiode.
7. a kind of integrated optical time domain reflection according to claim 2 is backwards to the transceiver of detection function, it is characterised in that: institute
The driving unit stated is a piezoelectric ceramic actuator or ultrasound electric machine.
8. a kind of integrated optical time domain reflection according to claim 3 is backwards to the transceiver of detection function, it is characterised in that: institute
The changeable refractive index unit stated is the fluid cartridge that a monocrystalline silicon or Micropump drive.
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| CN201510146662.4A CN106160845B (en) | 2015-03-31 | 2015-03-31 | A kind of transceiver of integrated optical time domain reflection backwards to detection function |
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| CN108007481B (en) * | 2017-12-07 | 2020-06-05 | 上海第二工业大学 | System for optical sensing by using optical nonreciprocal device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111687A (en) * | 2009-12-23 | 2011-06-29 | 中兴通讯股份有限公司 | Optical transmission realization system and method |
| CN102538848A (en) * | 2011-10-21 | 2012-07-04 | 上海大学 | Switching value optical fiber sensing system and short time cross-correlation positioning method thereof |
| CN103701522A (en) * | 2013-11-29 | 2014-04-02 | 武汉光迅科技股份有限公司 | Device for realizing optical time-domain reflection detection and optical signal amplification of optical fibers |
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- 2015-03-31 CN CN201510146662.4A patent/CN106160845B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111687A (en) * | 2009-12-23 | 2011-06-29 | 中兴通讯股份有限公司 | Optical transmission realization system and method |
| CN102538848A (en) * | 2011-10-21 | 2012-07-04 | 上海大学 | Switching value optical fiber sensing system and short time cross-correlation positioning method thereof |
| CN103701522A (en) * | 2013-11-29 | 2014-04-02 | 武汉光迅科技股份有限公司 | Device for realizing optical time-domain reflection detection and optical signal amplification of optical fibers |
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