CN100464205C - Micro-resonance loop channel elect optic switch - Google Patents
Micro-resonance loop channel elect optic switch Download PDFInfo
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- CN100464205C CN100464205C CNB2007100561881A CN200710056188A CN100464205C CN 100464205 C CN100464205 C CN 100464205C CN B2007100561881 A CNB2007100561881 A CN B2007100561881A CN 200710056188 A CN200710056188 A CN 200710056188A CN 100464205 C CN100464205 C CN 100464205C
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Abstract
The present invention is a micro-resonance loop channel optical select switch relating to optical passive network access technology and belonging to a wavelength division multiplex element, which comprises a substrate, a lower packaging layer, a waveguide layer I, a middle cushioning layer, a waveguide layer II, an upper packaging layer and an electrode layer from bottom to top. Wherein, the waveguide layer I is composed of an I/O channel waveguide and a micro-resonance loop with radius of R<SUB>0</SUB>. The waveguide layer II is composed of four micro-resonance loops with radius of R<SUB>1</SUB>. In addition, the waveguide layer I is separated from the waveguide layer II through the middle cushioning layer with thickness of d. Refractive index of the waveguide layer I and the waveguide layer II achieves n. Refractive index of the lower packaging layer, the middle cushioning layer and the upper packaging layer reaches n. The electrode layer is consisted of four Omega-shaped metal electrodes and electrode leads, which respectively arranged above four micro-resonance loops with radius R. The present invention can realize real-time broadcasting access, dynamically distribute wavelength resource on demand, greatly improves utilization ratio of the WDM element and reduce cost of access users.
Description
Technical field
The present invention relates to passive optical network access technology, belong to wavelength division multiplex device, is a kind of channel selective light switch based on micro-resonance loop, can be used for that Fiber to the home.
Background technology
Current, EPON (PON) technology has become the fiber-to-the-home preferred option of current realization, mainly contains APON at present, EPON and GPON.The common feature of these a few class PON technology is: distribute light signal by optical branching device between light-path top OLT and the optical network unit ONU, time division multiplex/time-division multiplexing multiple access (TDM/TDMA) technology is adopted in up-downgoing respectively, and uses different fixed wave length to carry out data transmission respectively.But these a few class PON technology that are based on TDM/TDMA transmission range and along separate routes than and upstream bandwidth all have some defectives.Therefore, introducing wavelength-division multiplex technique (WDM) in Access Network, also is WDM-PON technology solution that is inevitable.WDM-PON technology adopt ONU exclusively enjoy/mode of downstream wavelength comes transmitting data information, combines the characteristics of WDM and PON tree structure.Yet WDM-PON system faces the too high difficulty of device cost at present, and great majority research at present is exactly to be in breadboard theoretical research.In view of the wide development prospect that gets of Access Network, the wavelength division multiplex device cheaply of researching and developing novel suitable WDM-PON Access Network use is an important focus of optic communication device research at present and in the future.
In recent years, micro-resonator spare is applied to the research of wave filter and dense wave division multiplexer spare, becomes the focus of novel wavelength division multiplex device research field.Both at home and abroad to micro-resonator spare working mechanism deeply and extensive studies is that people have showed the bright prospects that micro-resonator spare is used, also have laid a good foundation for the practicability of micro-resonator spare.Yet, at present, no matter be external research or domestic research, great majority all also are in relevant theoretical and be applied to the preliminary fundamental research stage that the aspect is satisfied in the basic demand of wavelength-division multiplex system, mainly be to be applied as basic point of departure at micro-resonator spare in dense wavelength division multiplexing system, the research of the novel micro-resonance loop channel elect optic switch of using at Access Network is then less relatively.The micro-resonance loop compact structure, application mode and good frequency-selecting performance make the micro-resonance loop resonating device be fit to very much the Access Network application flexibly.
Summary of the invention
The present invention proposes a kind of novel micro-resonance loop structure of utilizing and realizes broadcasting in real time the channel selective light switch of access.This channel selective light switch both can realize on demand that in real time broadcasting inserted, dynamic assignment wavelength resource on demand again, thus reduce the cost that inserts the user greatly, therefore, be very suitable for that following Fiber to the home (FFTH) uses based on WDM-PON.
This channel selective light switch is vertical coupled by a less micro-resonance loop that is in together mutually in the last plane with the bigger micro-resonance loop of radius in the I/O channel waveguide is in same plane and four radiuses, the micro-resonance loop coupling that one of them micro-resonance loop and input channel and radius are bigger, be responsible for the selection input of signal, other three micro-resonance loops respectively with bigger micro-resonance loop of radius and different delivery channel couplings, carry out the output of signal.Heating electrode above these four micro-resonance loops when three output micro-resonance loops are in equal state with the input micro-resonance loop, obtains almost completely identical signal from corresponding three delivery channels, thereby can realize real-time broadcast capability fully respectively.When the state to four micro-resonance loops changes, can realize that again the selectivity of signal inserts.Therefore, device can have four kinds of duties, is respectively: three delivery channels work simultaneously, two delivery channels are worked simultaneously, delivery channel work and the work of no-output channel, hereinafter are called Case3, Case2, Case1, Case0.Change the heated condition of the metal electrode of four Ω shapes, realize the mutual switching between above-mentioned four kinds of duties.
The difference of specific implementation during according to different and identical switching of the switching between the duty, switch motion can be divided into three classes again: the first kind is that directly modulation input micro-resonance loop is realized switching function, when switching to Case0 as Case3, Case2, Case1; Second class is to modulate output micro-resonance loop and input micro-resonance loop realization switching function simultaneously, when switching to Case0 as Case3, Case2, Case1; The 3rd class is that modulation needs the micro-resonance loop of the delivery channel correspondence of switch to realize switching function, as Case3 to Case2 switch and Case2 when Case1 switches.
This channel selective light switch is divided into seven layers from down to up: substrate, under-clad layer, ducting layer I, intermediate buffering layer, ducting layer II, top covering, electrode layer.Ducting layer I is that the micro-resonance loop of R is formed by I/O channel waveguide and radius, and ducting layer II is R by radius
1Four micro-resonance loops form.Isolate by the intermediate buffering layer between ducting layer I and the ducting layer II.Electrode layer comprises the metal electrode and the contact conductor of four Ω shapes, and laying respectively at four radiuses is R
1Micro-resonance loop directly over.
The advantage of the present invention and other optical channel selective light switch is as follows:
1. the present invention can realize that broadcasting inserts in real time.
2. the present invention's dynamic assignment wavelength resource on demand.
3. the present invention has improved the utilization factor of wavelength division multiplex device greatly.
4. the present invention can reduce the cost that inserts the user greatly.
Description of drawings
Fig. 1 is the cross section structure figure of little ring waveguide and I/O channel waveguide coupling regime.Wherein substrate 1, under-clad layer 2, ducting layer I3, intermediate buffering layer 4, ducting layer II5, top covering 6, electrode layer 7.
Fig. 2 is a micro-resonance loop channel elect optic switch structural representation of the present invention.Wherein input port 11, four output ports 12,14,22,24, big identical 16,17,18,19, four channel waveguides 13,15,21,23 of micro-resonance loop of 20, four radiuses of micro-resonance loop.
Embodiment
This device is a kind of vertical coupled fiber waveguide device.Ask for an interview Fig. 1: the cross section structure figure of little ring waveguide and I/O channel waveguide coupling regime.Device is made up of seven layer plane structures, is respectively from down to up: substrate 1, under-clad layer 2, ducting layer I3, intermediate buffering layer 4, ducting layer II5, top covering 6, electrode layer 7.Wherein, ducting layer I3 is that the big micro-resonance loop of R is formed by I/O channel waveguide and radius, and ducting layer II5 is R by radius
1Four micro-resonance loops form.Isolated by intermediate buffering layer 4 between ducting layer I3 and the ducting layer II5, its thickness is d.The refractive index of ducting layer I3 and ducting layer II5 is n1, and the refractive index of under-clad layer 2, intermediate buffering layer 4 and top covering 6 is n2.Electrode layer 7 comprises the metal electrode and the contact conductor of four Ω shapes, and laying respectively at four radiuses is R
1Micro-resonance loop directly over.
Fig. 2 is a micro-resonance loop channel elect optic switch structural representation of the present invention.Device has an input port 11 and four output ports 12,14,22,24, and wherein output port 12 is a straight-through port, and output port 14,22,24 is for passing port down. Channel waveguide 13,15,21,23, i.e. input channel waveguide 13, first delivery channel waveguide 15, second delivery channel waveguide 23, the 3rd delivery channel waveguide 21 and radius be the big micro-resonance loop 20 of R on same plane, form ducting layer I3, radius is R
1Four micro-resonance loops 16,17,18,19, promptly import micro-resonance loop 16, the first output micro-resonance loop 17, the second output micro-resonance loop 18, the 3rd output micro-resonance loop 19 at grade, form ducting layer II5.Wherein importing micro-resonance loop 16 forms vertical coupled with input channel waveguide 13 and micro-resonance loop 20 respectively, first micro-resonance loop 17 forms vertical coupled with the first delivery channel waveguide 15 and micro-resonance loop 20 respectively, second micro-resonance loop 18 is vertical coupled with the second delivery channel waveguide 23 and micro-resonance loop 20 formation respectively, and the 3rd micro-resonance loop 19 forms vertical coupled with the 3rd delivery channel waveguide 21 and micro-resonance loop 20 respectively.Arrow among the figure is represented the transmission direction of light.
According to Fig. 2, make the micro-resonance loop that I/O channel waveguide and radius are R at grade, make four radiuses thereon in the plane and be all R
1Micro-resonance loop, radius is R
1Micro-resonance loop 16 be micro-resonance loop 20 couplings of R with input channel 11 and radius, be responsible for the selection input of signal; Micro-resonance loop 17,18,19 is micro-resonance loop 20 and three delivery channel waveguide 15,21,23 couplings of R with radius respectively, carries out the output of signal.Be R at radius respectively
1Micro-resonance loop top heating electrode, realize the difference of each micro-resonance loop is controlled separately.When three output micro-resonance loops are in equal state with the input micro-resonance loop, from corresponding three delivery channels 14,22,24, obtain almost completely identical signal, thereby can realize real-time broadcast capability fully.When the state of four micro-resonance loops changes, can realize that again the selectivity of signal inserts.Change the state of each micro-resonance loop top thermode so that the refractive index of micro-resonance loop changes, and then reach the switch purpose of each micro-resonance loop a certain wavelength.
Claims (3)
1. micro-resonance loop channel elect optic switch is characterized in that this device from bottom to top is divided into seven layers: substrate (1), under-clad layer (2), ducting layer I (3), intermediate buffering layer (4), ducting layer II (5), top covering (6), electrode layer (7), wherein:
Ducting layer I (3) is that the big micro-resonance loop of R is formed by I/O channel waveguide and radius;
Ducting layer II (5) is R by four radiuses
1Micro-resonance loop form R wherein
1＜R;
Isolated by intermediate buffering layer (4) between ducting layer I (3) and the ducting layer II (5), its thickness is d, and the refractive index of ducting layer I (3) and ducting layer II (5) is n
1
The refractive index of under-clad layer (2), intermediate buffering layer (4) and top covering (6) is n
2
Electrode layer (7) comprises the metal electrode and the contact conductor of four Ω shapes, directly over the micro-resonance loop that to lay respectively at four radiuses be R1;
Ducting layer I (3) is by four channel waveguides (13), (15), (21), (23), i.e. input channel waveguide (13), the first delivery channel waveguide (15), the second delivery channel waveguide (23), the 3rd delivery channel waveguide (21) and radius are formed ducting layer I (3) by the big micro-resonance loop (20) of R on same plane; Radius is R
1Four micro-resonance loops (16), (17), (18), (19), promptly import micro-resonance loop (16), the first output micro-resonance loop (17), the second output micro-resonance loop (18), the 3rd output micro-resonance loop (19) on same plane, form ducting layer II (5); Wherein importing micro-resonance loop (16) forms vertical coupled with input channel waveguide (13) and big micro-resonance loop (20) respectively, the first output micro-resonance loop (17) forms vertical coupled with the first delivery channel waveguide (15) and big micro-resonance loop (20) respectively, the second output micro-resonance loop (18) is vertical coupled with the second delivery channel waveguide (23) and big micro-resonance loop (20) formation respectively, and the 3rd output micro-resonance loop (19) forms vertical coupled with the 3rd delivery channel waveguide (21) and big micro-resonance loop (20) respectively.
2. according to the described a kind of micro-resonance loop channel elect optic switch of claim 1, it is characterized in that this micro-resonance loop channel elect optic switch can have four kinds of duties, be respectively: three delivery channels work simultaneously, two delivery channels are worked simultaneously, delivery channel work and the work of no-output channel, are called Case3, Case2, Case1, Case0; Change the heated condition of the metal electrode of four Ω shapes, realize the mutual switching between above-mentioned four kinds of duties.
3. according to the described a kind of micro-resonance loop channel elect optic switch of claim 2, it is characterized in that switch motion can be divided into three classes by the mutual switching between the above-mentioned four kinds of duties of corresponding switch motion combination realization: the first kind is that directly modulation input micro-resonance loop is realized switching function; Second class is to modulate output micro-resonance loop and input micro-resonance loop realization switching function simultaneously; The 3rd class is that the micro-resonance loop of modulating the delivery channel correspondence that needs switch is realized switching function.
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| CNB2007100561881A CN100464205C (en) | 2007-10-18 | 2007-10-18 | Micro-resonance loop channel elect optic switch |
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| CN100464205C true CN100464205C (en) | 2009-02-25 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101620298B (en) * | 2008-06-30 | 2011-04-20 | 华为技术有限公司 | Optical switch |
| CN101726801B (en) * | 2008-10-28 | 2011-11-02 | 华为技术有限公司 | Optical switching device and control method thereof |
| CN103091784B (en) * | 2013-01-29 | 2014-11-12 | 浙江大学 | Low-loss four-port non-blocking optics router based on micro-ring resonator |
| CN103308988B (en) * | 2013-04-28 | 2015-04-29 | 浙江大学 | 4*4 nonblocking optical switching network based on five microring resonators |
| CN103955147B (en) * | 2014-04-24 | 2016-06-22 | 电子科技大学 | A kind of control device of micro-loop photoswitch |
| CN106125296A (en) * | 2016-06-23 | 2016-11-16 | 无锡宏纳科技有限公司 | The one of a kind of doubleway output selects four photoswitches |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05323391A (en) * | 1992-05-20 | 1993-12-07 | Nippon Telegr & Teleph Corp <Ntt> | Optical signal processor |
| JP2001228347A (en) * | 2000-02-16 | 2001-08-24 | Japan Science & Technology Corp | Optical waveguide type wavelength filter |
| US20060078254A1 (en) * | 2004-10-08 | 2006-04-13 | Djordjev Kostadin D | Vertically coupling of resonant cavities to bus waveguides |
| CN1893334A (en) * | 2005-07-01 | 2007-01-10 | 中国科学院长春光学精密机械与物理研究所 | Polymer micro-resonance-ring wave-dividing multiplexer and preparing method therefor |
| CN1896786A (en) * | 2005-09-30 | 2007-01-17 | 中国科学院长春光学精密机械与物理研究所 | Wave-guided selecting wave-length division multiplexing/de-multiplexing device and its production |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05323391A (en) * | 1992-05-20 | 1993-12-07 | Nippon Telegr & Teleph Corp <Ntt> | Optical signal processor |
| JP2001228347A (en) * | 2000-02-16 | 2001-08-24 | Japan Science & Technology Corp | Optical waveguide type wavelength filter |
| US20060078254A1 (en) * | 2004-10-08 | 2006-04-13 | Djordjev Kostadin D | Vertically coupling of resonant cavities to bus waveguides |
| CN1893334A (en) * | 2005-07-01 | 2007-01-10 | 中国科学院长春光学精密机械与物理研究所 | Polymer micro-resonance-ring wave-dividing multiplexer and preparing method therefor |
| CN1896786A (en) * | 2005-09-30 | 2007-01-17 | 中国科学院长春光学精密机械与物理研究所 | Wave-guided selecting wave-length division multiplexing/de-multiplexing device and its production |
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