CN1719754A - Plane integrated single fibre three-directional optical signal processing chip device - Google Patents
Plane integrated single fibre three-directional optical signal processing chip device Download PDFInfo
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- CN1719754A CN1719754A CNA2005100357700A CN200510035770A CN1719754A CN 1719754 A CN1719754 A CN 1719754A CN A2005100357700 A CNA2005100357700 A CN A2005100357700A CN 200510035770 A CN200510035770 A CN 200510035770A CN 1719754 A CN1719754 A CN 1719754A
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Abstract
This invention discloses a plane integrate single fiber three-way optical signal process chip device including an outer cavity a y-like grating assistant coupler for separating optical wave signals with two different input wavelengths, a digital signal receiver, an analog signal receiver and an I/O port of external network, among which, there components are connected by waveguides, the light wave generated by waveguides, the light wave generated by the outer cavity laser is output directionally after being reflected by the grating assistant coupler to a related receiver.
Description
Technical field
The present invention relates to a kind of opto-electronic device, particularly relate to a kind of plane integrated single fibre three-directional optical signal processing chip device.
Background technology
Along with people require increasing (as IPTV, VOIP or the like) to the network bandwidth, access technology that Fiber to the home (FTTH) is as solution final, that put things right once and for all in future, be widely used and approve, TRIPLAY, promptly numeral, sound and television image (VIDEO) transmit bright spot and the main flow that has become the FTTH development gradually on same optical fiber.
But FTTH will be popularized, and must reduce cost, and conduct inserts the single fiber three-way optical processor (triplexer) of the Primary Component of user side, and the reduction of its cost and the high ratio of performance to price are key one rings that reduces cost.Fiber-to-the-home application relates to three signals, they are respectively the digital signal of user to network output, such as send Email and picture etc. and users from networks receive the digital signal of downloading, be used for received television program such as receive Email and picture etc. and analog signal.These three groups of signals are carried by three different light of wavelength respectively after the electric light conversion, and promptly the light of 1310nm wavelength is the digital signal of user's output, and 1490nm is the digital signal of user's download, and 1550nm is the analog signal of user's download.The single fiber three-way optical processor is actually device in the center of handling these three wavelength optical signals.
Existing single fiber three-way optical processor commonly used is considered mating plate by passive wave splitting/composing, laser, detector and the precision machined metal shell of process assemble, its major defect is: 1, since device to passive wave splitting/composing filter, laser, the index request of detector and device package housing is very high, such as isolation, the height that technical requirements such as PDL are suitable makes the technological requirement of assembling also become very high, causes the price comparison costliness.2, passive wave splitting/composing is considered mating plate, laser, and after detector integrates, because the uplink and downlink signal can produce and crosstalk, the optical crosstalk between the different wavelengths of light, these are crosstalked also can bring the final performance of device and seriously influence.3, laser and two-way detector want while and an optical fiber to be coupled, and can interfere with each other between the device, cause index and rate of finished products to reduce.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, provide a kind of cost low, manufacture craft simple plane integral single fibre three-way optical signal processing chip device.
Above-mentioned purpose can realize by following technical measures: comprise being used to produce output wavelength λ
1Outside cavity gas laser, one be used for output wavelength λ
1The Y shape grating auxiliary coupler of light signal changed course, one are used to separate two different input wavelength λ
2, λ
3Y shape grating auxiliary coupler, digit signal receiver, the receiver of the analog signal of lightwave signal and be used for the input/output end port of external network, connect by waveguide between each building block, the light wave that outside cavity gas laser produces reflexes to another single mode arm output through a single mode arm of output light-wave signal grating auxiliary coupler, the input lightwave signal of two different wave lengths of advancing in the same way is by the grating auxiliary coupler of output light-wave signal, and the grating auxiliary coupler separation through separating lightwave signal is input to corresponding receiver.
Two arms of described Y shape grating auxiliary coupler are the different single mode waveguide of cross-sectional sizes, the coupled zone is rerouted to inclination reflecting grating that another arm export in the coupled zone with the setting wavelength emission that is used for from an arm input for supporting the two-mode waveguide of pattern on two arms.
Described outside cavity gas laser is made of waveguide reflecting grating and the chip gain that is integrated on the silica-based waveguides sheet, one end of chip gain is coated with reflectivity and is bordering on 100% highly reflecting films, the other end is coated with reflectivity and is bordering on 0% anti-reflective film, the waveguide reflecting grating writes near in the waveguide of an end that is coated with anti-reflective film, and waveguide reflecting grating like this and chip gain highly reflecting films have constituted the resonant cavity of outside cavity gas laser and formed laser.
The gain band centre wavelength of the zone of reflections centre wavelength of waveguide reflecting grating and chip gain all is 1310nm in the described outside cavity gas laser.
The light delivery outlet of described outside cavity gas laser connects the power monitoring diode, makes the outside cavity gas laser constant output.
Described fiber waveguide is the planar light tunnel waveguide that is grown in the germanium-doped silica (SiO2:Ge) on the silicon wafer.
Comprise the outside cavity gas laser that is used to produce the 1310nm wavelength, a Y shape grating auxiliary coupler that is used to export the 1310nm lightwave signal, a Y shape grating auxiliary coupler that is used to separate 1490nm and 1550nm input lightwave signal, digit signal receiver, receiver of the analog signal and the input/output end port that is used to be connected external network, the light delivery outlet of outside cavity gas laser is connected to a single mode arm on the Y shape grating auxiliary coupler of output light-wave signal through associative mode optical waveguide coupled, its another single mode arm is through the optical waveguide coupled input/output end port that is connected to of associative mode, the bimodulus coupled zone of the grating auxiliary coupler of output light-wave signal is connected to a single mode arm on the grating auxiliary coupler that separates lightwave signal through fiber waveguide, another single mode arm and the bimodulus coupled zone of separating the grating auxiliary coupler of lightwave signal are connected with signal receiver accordingly through the fiber waveguide of associative mode separately; The 1310nm light wave that outside cavity gas laser produces reflexes to another single mode arm output through a single mode arm of output light-wave signal grating auxiliary coupler, the input lightwave signal that 1490nm and 1550nm advance in the same way is by the grating auxiliary coupler of output light-wave signal, and the grating auxiliary coupler separation through separating lightwave signal is input to corresponding receiver.
The passband filter coating is established in the plating of the receiving port of grafting passband filter or digit signal receiver between the fiber waveguide that the receiving port of described digit signal receiver and its are of coupled connections, in case stop signal is crosstalked.
Because the ready-made production technology that each parts that the present invention formed and device integral body can adopt the semiconductor electronic chip is carried out large-scale production, therefore have full-automation, high volume production, cost is low, the rate of finished products height, manufacture craft is ripe simple, is fit to large-scale production.
Description of drawings
Fig. 1 is a catenation principle schematic diagram of the present invention;
Fig. 2 is the principle schematic of outside cavity gas laser among the present invention;
Fig. 3 is the principle schematic that is used to export the Y shape grating auxiliary coupler of 1310nm lightwave signal;
Fig. 4 is the principle schematic that is used to separate the Y shape grating auxiliary coupler of 1490nm and 1550nm lightwave signal.
Embodiment
As shown in Figure 1, comprise the outside cavity gas laser that is used to produce the 1310nm wavelength, a Y shape grating auxiliary coupler 1 that is used to export the changed course of 1310nm output light-wave signal, a Y shape grating auxiliary coupler 2 that is used to separate 1490nm and 1550nm input lightwave signal, digit signal receiver, receiver of the analog signal and the input/output end port that is used for external network, the light delivery outlet of outside cavity gas laser is connected to a single mode arm on the Y shape grating auxiliary coupler of output light-wave signal through associative mode optical waveguide coupled, its another single mode arm is through the optical waveguide coupled input/output end port that is connected to of associative mode, the bimodulus coupled zone of the grating auxiliary coupler of output light-wave signal is connected to a single mode arm on the grating auxiliary coupler that separates lightwave signal through fiber waveguide, another single mode arm and the bimodulus coupled zone of separating the grating auxiliary coupler of lightwave signal are connected with signal receiver accordingly through the fiber waveguide of associative mode separately.Above-mentioned fiber waveguide can be germanium-doped silica (SiO2:Ge) the tunnel waveguide that is grown on the silicon wafer, and diode in the signal receiver and chip gain are based on indium phosphide (InP) material.Outside cavity gas laser is to be used for producing 131Onm wavelength transmission user output signal, this 1310nm wavelength output signal reflexes to another single mode arm output by output light-wave signal grating auxiliary coupler from a single mode arm, is sent to input/output port through the waveguide of planar light tunnel.Digital signal and the 1550nm analog signal of the 1490nm that will advance in the same way after the grating auxiliary coupler of separation lightwave signal will be downloaded are separated, and the digital signal of the 1490nm that separates and 1550nm analog signal are delivered to digit signal receiver and receiver of the analog signal respectively through the waveguide of planar light tunnel.
As shown in Figure 2, outside cavity gas laser is made of waveguide reflection Bragg grating 3, chip gain and power monitoring diode, the centre wavelength of the gain band of chip gain (Gain chip) is near 13010nm, chip gain can be integrated on the silica-based waveguides sheet by the mode of end face to end face (Butt coupling), so that the light that chip gain is sent is directly coupled in the waveguide.The two ends of chip gain all are coated with film, are that reflectivity is bordering in 100% highly reflecting films away from an end of waveguide, and in the face of an end of waveguide be that reflectivity is bordering on 0% anti-reflective film.In waveguide, write reflection kernel at reflection Prague of 1310nm (Bragg) grating near the end that is coated with anti-reflective film of chip gain, the suitable reflectivity of grating makes grating waveguide add that it is the outside cavity gas laser of 1310nm that chip gain has constituted wavelength, light delivery outlet at outside cavity gas laser connects the power monitoring diode, makes the outside cavity gas laser constant output.Because silica-based SiO
2The lower thermal refractive index coefficient of waveguide, the wavelength of this laser has outstanding temperature job stability, make the wavelength of laser both make in-40 ℃～85 ℃ very wide device serviceability temperature scope, also to change very little, bring convenience for the separation etc. of wavelength.
Two arms of Y shape grating auxiliary coupler are the different single mode waveguide of cross-sectional sizes, and the coupled zone is for supporting the two-mode waveguide of pattern on two arms, in the coupled zone be used for set wavelength from an arm reflection be rerouted to another arm the inclination reflecting grating.As shown in Figure 3, be used to export the Y shape grating auxiliary coupler of 1310nm lightwave signal, the course of work is as follows: two wave guide modes are supported in the waveguide of coupled zone, and one of them mould is similar to the basic mould of waveguide arm 4, another one is similar to the basic mould of waveguide arm 5, two waveguide arm cross-sectional sizes differences.When the optical mode of being supported by waveguide arm 4 incides on the grating auxiliary coupler through this arm, the mould that forward direction is advanced in the perturbation that oblique raster 6 in the coupler is introduced is converted to the back gradually to the mould of advancing, this conversion has strict wavelength selectivity, promptly can only carry out certain wavelength, wavelength is to be decided by the cycle of grating.Owing to be reflecting grating, can reach 100% by the length of control grating or the efficient of this conversion of change of refractive.The supposition wavelength is that the light of 1310nm incides on the light auxiliary coupler with the mould that moves ahead of waveguide arm 4 in Fig. 3, because the strict wavelength selectivity of light auxiliary coupler, wavelength is that the light of 1310nm is reflected, pattern is the back capable mould of waveguide arm 5 by the moding that moves ahead of waveguide arm 4 simultaneously, is coupled away through waveguide arm 5 then.
Three wavelength involved in the present invention are 1310nm (being used to launch digital signal), 1490nm (being used for receiving digital signals) and 1550nm (being used to receive analog signal).The output of 1310nm digital signal is realized by outside cavity gas laser and grating auxiliary coupler.The function that is used to export the Y shape grating auxiliary coupler of 1310nm lightwave signal is that wavelength is reflexed to another arm at the light of 1310nm by the incident arm, and the subscriber signal of 1310nm outside cavity gas laser is transmitted into the gateway, enters network through monomode fiber then.
The 1490nm light wave digital signal and the 1550nm light wave analog signal of being come by network incide on the I/O port through monomode fiber, owing to be used to export the wavelength selectivity of the grating auxiliary coupler of 1310nm lightwave signal, these two signals are all experienced the interference less than grating, and advance by the 1310nm grating auxiliary coupler with constant pattern, 1490nm enters with the 1550nm signal and separates grating auxiliary coupler, and the selection wavelength of grating 9 is 1490nm in this separation grating auxiliary coupler.Because the strict wavelength selectivity of grating, the analog signal impression of 1550nm is incided on the analog receiver less than the interference of grating, the 1490nm signal is then reflexed on the digit receiver by grating auxiliary coupler with the principle of similar above-mentioned 1310nm operation, sees Fig. 4, and wavelength is λ
2, λ
3Light incide on the light auxiliary coupler with the basic mode of waveguide arm 7 because the strict wavelength selectivity of light auxiliary coupler, wavelength X
2Light (being 1490nm) be reflected, simultaneously pattern becomes the basic mode of waveguide arm 8 by the basic mode of waveguide arm 7, other wavelength (such as 1550nm) then passes through grating auxiliary coupler without interruption.The wave-length coverage of 1490nm signal is 1490 ± 10nm, so the reflection bandwidth of grating assistor requires to be 20nm that this width can be realized by warble (chirp) in the technology manufacturing.
Because the reflectivity of grating auxiliary coupler can reach 100%, and because very big wavelength spacing, the 1310nm laser signal is very little with the cross-talk that simulates signal receiver to numeral.Same since be bordering on 100% grating auxiliary coupler reflectivity and relative a little less than digital signal, the cross-talk probability of 1490nm is very little in the 1550nm analog signal.For the digital signal of 1490nm,, can realize by additional film filter 10 for the isolation of 1310nm and 1550nm signal although it is more weak.The thin film filter that adopts is passband filter (Bandpass filter), and it can be refused 1490nm ± 10nm by the light of other wavelength beyond the band, and then reduces 1310nm and the 1550nm signal cross-talk at the 1490nm place.The element assembling that the passband filter is can one discrete is plugged between the receiving port of digit signal receiver and the fiber waveguide that it is of coupled connections; Also can prevent crosstalking of stop signal by receiving port plating passband filter coating at digit signal receiver.
Claims (8)
1, a kind of plane integrated single fibre three-directional optical signal processing chip device is characterized in that: comprise being used to produce output wavelength λ
1Outside cavity gas laser, one be used for output wavelength λ
1The Y shape grating auxiliary coupler of light signal changed course, one are used to separate two different input wavelength λ
2, λ
3Y shape grating auxiliary coupler, digit signal receiver, the receiver of the analog signal of lightwave signal and be used for the input/output end port of external network, connect by waveguide between each building block, the light wave that outside cavity gas laser produces reflexes to another single mode arm output through a single mode arm of output light-wave signal grating auxiliary coupler, the input lightwave signal of two different wave lengths of advancing in the same way is by the grating auxiliary coupler of output light-wave signal, and the grating auxiliary coupler separation through separating lightwave signal is input to corresponding receiver.
2, plane integrated single fibre three-directional optical signal processing chip device according to claim 1, it is characterized in that: two arms of described Y shape grating auxiliary coupler are the different single mode waveguide of cross-sectional sizes, the coupled zone is rerouted to inclination reflecting grating that another arm export in the coupled zone with the setting wavelength emission that is used for from an arm input for supporting the two-mode waveguide of pattern on two arms.
3, plane integrated single fibre three-directional optical signal processing chip device according to claim 1, it is characterized in that: described outside cavity gas laser is made of waveguide reflecting grating and the chip gain that is integrated on the silica-based waveguides sheet, one end of chip gain is coated with reflectivity and is bordering on 100% highly reflecting films, the other end is coated with reflectivity and is bordering on 0% anti-reflective film, and the waveguide reflecting grating writes near in the waveguide of an end that is coated with anti-reflective film.
4, according to claim 1 or 3 described plane integrated single fibre three-directional optical signal processing chip devices, it is characterized in that: the gain band centre wavelength of the zone of reflections centre wavelength of waveguide reflecting grating and chip gain all is 1310nm in the described outside cavity gas laser.
5, plane integrated single fibre three-directional optical signal processing chip device according to claim 4 is characterized in that: the light delivery outlet of described outside cavity gas laser connects the power monitoring diode, makes the outside cavity gas laser constant output.
6, according to claim 1 or 2 or 3 described plane integrated single fibre three-directional optical signal processing chip devices, it is characterized in that: described waveguide is the planar light tunnel waveguide that is grown in the germanium-doped silica on the silicon wafer.
7, plane integrated single fibre three-directional optical signal processing chip device according to claim 1, it is characterized in that: comprise the outside cavity gas laser that is used to produce the 1310nm wavelength, a Y shape grating auxiliary coupler that is used to export the 1310nm lightwave signal, a Y shape grating auxiliary coupler that is used to separate 1490nm and 1550nm input lightwave signal, digit signal receiver, receiver of the analog signal and the input/output end port that is used to be connected external network, the light delivery outlet of outside cavity gas laser is connected to a single mode arm on the Y shape grating auxiliary coupler of output light-wave signal through associative mode optical waveguide coupled, its another single mode arm is through the optical waveguide coupled input/output end port that is connected to of associative mode, the bimodulus coupled zone of the grating auxiliary coupler of output light-wave signal is connected to a single mode arm on the grating auxiliary coupler that separates lightwave signal through fiber waveguide, another single mode arm and the bimodulus coupled zone of separating the grating auxiliary coupler of lightwave signal are connected with signal receiver accordingly through the fiber waveguide of associative mode separately; The 1310nm light wave that outside cavity gas laser produces reflexes to another single mode arm output through a single mode arm of output light-wave signal grating auxiliary coupler, the input lightwave signal that 1490nm and 1550nm advance in the same way is by the grating auxiliary coupler of output light-wave signal, and the grating auxiliary coupler separation through separating lightwave signal is input to corresponding receiver.
8, according to claim 1 or 7 described plane integrated single fibre three-directional optical signal processing chip devices, it is characterized in that: the passband filter coating is established in the plating of the receiving port of grafting passband filter or digit signal receiver between the fiber waveguide that the receiving port of described digit signal receiver and its are of coupled connections.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100357700A CN1719754A (en) | 2005-07-14 | 2005-07-14 | Plane integrated single fibre three-directional optical signal processing chip device |
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| CNA2005100357700A CN1719754A (en) | 2005-07-14 | 2005-07-14 | Plane integrated single fibre three-directional optical signal processing chip device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879858A (en) * | 2012-10-26 | 2013-01-16 | 江苏尚飞光电科技有限公司 | Single-fiber three-way multiplexer with grating |
-
2005
- 2005-07-14 CN CNA2005100357700A patent/CN1719754A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879858A (en) * | 2012-10-26 | 2013-01-16 | 江苏尚飞光电科技有限公司 | Single-fiber three-way multiplexer with grating |
| CN102879858B (en) * | 2012-10-26 | 2015-05-13 | 江苏尚飞光电科技有限公司 | Single-fiber three-way multiplexer with grating |
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