TW201300861A - Bidirectional reconfigurable optical wavelength routing device for all optical network - Google Patents

Abstract

This patent proposes a bidirectional optical add-drop multiplexer (BROADM) with allowing white spectral channels input. By using the filter routing rule of array waveguide grating (AWG), the wavelength channels we want to add-drop can be reflected by using the corresponding fiber Bragg grating (FBG). The wavelength channels we don't want to add-drop can pass through the output by making FBG wavelength away from the wavelength channels. The bandwidth between two adjacent wavelength channels in each AWG pair ports is wider than one wavelength channels so that the filter property of the AWG is regarded to make the FBG modulation to realize the wavelength routing function without interfering other wavelength channels. The proposed BROADM allows the wavelength management in bidirectional optical network as well as the wavelength channels can be flexible handled by installing the corresponding FBG. Therefore, the RAODM make the optical network more flexibly and higher transmission capacity.

Description

Bidirectional all-optical full-frequency optical wavelength configuration routing device

The invention relates to a bidirectional all-optical full-frequency optical wavelength configuration routing device, which is a routing rule for wavelength filtering by array waveguide grating, and a suitable adjustable Bragg fiber grating to provide wavelength routing of a bidirectional optical network. management.

Conventional fiber optic networks use only one-way configuration of wavelength routing devices, and need to limit the number of wavelength signal inputs, can not provide more flexible network requirements, and the cost is relatively expensive, can not provide more flexibility to network managers Network management services are difficult to provide cheaper and more flexible wavelength routing equipment for domestic fiber networks.

The biggest disadvantages of the above-mentioned conventional optical fiber network unidirectional configuration wavelength routing device are:

1. General fiber optic networks use only one-way configured wavelength routing devices.

2. It is necessary to limit the number of wavelength signal inputs, and the network demand elasticity is poor.

3. Two-way configuration of the wavelength routing mechanism is costly to implement and low in economic efficiency.

4. It is not applicable to domestic fiber-optic communication network routing equipment, which is not flexible.

The above mentioned architecture of the unidirectional configuration wavelength routing device for the conventional optical fiber network, although it can achieve the general basic requirements and effects in the process of network signal processing, the integrity of the device in practical application and Under the circumstances that there are many shortcomings and deficiencies in the industrial application specific properties such as the integration capability of the network interface and the cost control, it is impossible to exert more specific industrial applicability.

In summary, due to the above-mentioned shortcomings and shortcomings of the optical fiber network unidirectional configuration wavelength routing device architecture, it is necessary to propose specific improvement solutions based on the future trend of industrial progress to meet the industrial progress. Need to further provide more technical options in the industry.

The invention solves the shortcomings of the integration of the unidirectional configuration wavelength routing device of the conventional optical fiber network, the integration capability of the network interface construction and the industrial application specificity such as cost control, and thus the invention patent proposes two-way. The all-optical full-frequency optical wavelength configuration routing device allows the input of the white light wavelength signal for the wavelength cycle characteristic, and the NxN array waveguide grating has a symmetrical characteristic, and the bilateral can be used as an input or an output, so that the bidirectional group can be realized by using this characteristic. The wavelength routing mechanism can save a lot of Bragg fiber gratings, and can be directly used in today's optical network environment without changing the network architecture.

Therefore, regardless of the subjective and objective conditions, the bidirectional all-optical full-frequency optical wavelength configuration routing device has no relevant technology in domestic and foreign patents and is currently applied to high-performance network signal processing frame construction, which has no substitute for the market. The advantages of the technology are extremely suitable for the equipment market such as the bidirectional all-optical full-frequency optical wavelength configuration routing device industry, which is bound to bring the production and design of the bidirectional all-optical full-frequency optical wavelength configuration routing device and its equipment. A great business opportunity in the industry-related market.

The invention realizes the bidirectional configuration wavelength routing mechanism by using a bidirectional all-optical full-frequency optical wavelength configuration routing device, using a pair of NxN array waveguide gratings and multiple adjustable Bragg fiber gratings.

In order to achieve the above object and effect, a bidirectional all-optical full-frequency optical wavelength configuration routing device comprises an NxN arrayed waveguide grating module, a fiber grating module, a first photodetector module and a second return light. The specific implementation of the module is as follows:

An NxN arrayed waveguide grating module has a first NxN arrayed waveguide grating and a second NxN arrayed waveguide grating, and the first NxN arrayed waveguide grating and the second NxN arrayed waveguide grating each comprise 2N connection ports, and Two of the first NxN arrayed waveguide gratings are connected as In/Out.

A fiber grating module having 2 (N-1) adjustable fiber grating columns, the adjustable fiber grating columns each comprising a plurality of adjustable fiber gratings;

A first photoreceiver module has 2 (N-1) four-turn photoreactors, and the four-turn photoreactor comprises four connecting ports, and two of the two four-turn photoreactors are connected. Interconnecting two adjustable fiber grating columns, the other two connecting wires are respectively connected to corresponding links of the first NxN arrayed waveguide grating and the second NxN arrayed waveguide grating.

A second photoreceiver module has two three-turn photoreactors, and the three-turn photoreactor comprises three interlocking ports, two of which are respectively added as Add and Drop, and the other is connected. The lanthanum is connected to the junction of the second NxN arrayed waveguide grating.

The order of the above NxN is more than four orders.

The In/Out埠 of the first NxN arrayed waveguide grating has a symmetrical characteristic of bidirectional output and input.

The plurality of adjustable fiber grating columns of the above-mentioned adjustable fiber grating columns are both Bragg fiber gratings.

The specific features and effects of the bidirectional all-optical full-frequency optical wavelength configuration routing device of the present invention are as follows:

1. A pair of NxN arrayed waveguide gratings and multiple adjustable Bragg fiber gratings are used to realize a bidirectional all-optical full-frequency optical wavelength configuration routing mechanism.

2. The arrayed waveguide grating wavelength cycle has a large free spectral range.

3. After the wavelength signal enters the NxN array waveguide grating, the mechanism is added or removed by the adjustable Bragg fiber grating, and the route screening elasticity is large.

4. The large free spectral range allows the Bragg fiber grating to have a large modulation range, and the wavelength cycling characteristic allows white light wavelength signal input.

5. NxN arrayed waveguide gratings have symmetrical characteristics, and can be used as inputs or outputs on both sides. This feature can realize the dual-configuration wavelength routing mechanism.

6. There is no need to limit the number of wavelength signal inputs, and the operating cost is relatively low, which can provide network administrators with more flexible network management services.

7. Provide low-cost and flexible routing equipment for domestic optical fiber communication networks.

8. Using the arrayed waveguide grating wavelength filtering routing rule, combined with the appropriate adjustable Bragg fiber grating reflection to add the wavelength signal extracted by -Drop.

9. Adjust the center wavelength of the adjustable Bragg fiber grating away from the wavelength signal so that the wavelength signal can directly reach the output port.

10. Through the filtering characteristics of the arrayed waveguide grating, the adjacent wavelength signal bandwidth between turns can be supplied to the adjustable Bragg fiber grating to modulate different wavelengths to perform routing mechanisms for different optical paths without interfering with other wavelength signals.

11. The wavelength routing device can provide wavelength routing management of the bidirectional optical network and can place corresponding Bragg fiber gratings according to requirements, thereby providing a more flexible and higher capacity network wavelength management system of the existing optical network.

Please refer to the first figure, which is a schematic diagram of a connection architecture of a bidirectional all-optical full-frequency optical wavelength configuration routing device according to an embodiment of the present invention. The present invention is a bidirectional all-optical full-frequency optical wavelength configuration routing device, including an NxN array. a waveguide grating module (1), a fiber grating module (2), a first photoreceiver module (3) and a second photoreactor module (4), wherein:

The NxN array waveguide grating module (1) is connected to the first photoreceiver module (3) and the second photoreactor module (4), and the first photoreceiver module (3) is coupled to the fiber grating module (2) ).

Please refer to the second and third figures, which are schematic diagrams of a first single set bidirectional all-optical full-frequency optical wavelength configuration routing device and a second single-group bidirectional all-optical full-frequency optical wavelength configuration routing device according to an embodiment of the invention The present invention is a bidirectional all-optical full-frequency optical wavelength configuration routing device, comprising an NxN array waveguide grating module (1), a fiber grating module (2), and a first photoreactor module ( 3) and a second photoreceiver module (4), wherein:

An NxN arrayed waveguide grating module (1) having a first NxN arrayed waveguide grating (11) and a second NxN arrayed waveguide grating (12), the first NxN arrayed waveguide grating (11) and the second NxN arrayed waveguide grating (12) each includes 2N connection ports (111, 121). In addition, two of the first NxN arrayed waveguide gratings (11) are connected to each other (111) as In/Out, and the order of the above NxN is four. Above the order, and the In/Out埠 of the first NxN arrayed waveguide grating (1) has a symmetrical characteristic of bidirectional output and input.

A fiber grating module (2) having 2 (N-1) adjustable fiber grating columns (21), the adjustable fiber grating columns (21) each comprising a plurality of adjustable fiber gratings (211), the above adjustable The complex tunable fiber grating (211) columns of the fiber grating array (21) are both Bragg fiber gratings.

A first photoreceiver module (3) has 2 (N-1) four-turn photoreactors (31), and the four-turn photoreactor (31) includes four connection ports (311), each of which Two connecting 埠 (311) of the two four-turn ejector (31) are connected to the two adjustable fiber grating columns (21), and the other two connecting 埠 (311) are respectively connected to the first NxN array waveguide grating (11) And a corresponding connection 埠 (111, 121) of the second NxN arrayed waveguide grating (12).

A second photoreceiver module (4) has two three-turn photoreactors (41), and the three-turn photoreactor (41) includes three connecting ports (411), two of which are connected to each other (411). The 埠 and the Drop are respectively taken out, and the other 埠 (411) is connected to the connection 埠 (121) of the second NxN arrayed waveguide grating (12).

The specific feasible implementation methods and theoretical contents are detailed as follows:

The two-way reconfigurable optical signal plug-in multiplexer shown in the first figure is composed of a pair of 4x4 arrayed waveguide gratings (including a first NxN (N=4) arrayed waveguide grating (11) and a second NxN (N=4). Array waveguide grating (12)], combining three sets of four-turn photoreactors (31), two three-turn photoreactors (41) and a plurality of multi-adjustable Bragg fiber gratings (ie, fiber grating modules (2) The tunable fiber grating column (21) is combined. When the wavelength signals λ ₁ , λ ₂ , ... λ _{N are} input from In1/Out2, the first NxN (N=4) arrayed waveguide grating is above ( 11) Wavelength multiplexing is performed first, that is, R1 obtains wavelength signals λ ₁ , λ ₅ , λ ₉ ..., and R2 obtains wavelength signals λ ₂ , λ ₆ , λ ₁₀ ..., and R3 obtains wavelength signals λ ₃ , λ ₇ , λ ₁₁ ..., R4 obtains the wavelength signals λ ₄ , λ ₈ , λ ₁₂ ..., and the wavelength routing rule of the NxN arrayed waveguide grating module (1) is shown in the fourth figure.

After the NxN arrayed waveguide grating module (1) performs the wavelength multiplexing task, each pair of pairs [L2-R2, L3-R3 and L4-R4] is connected through two four-turn photoreactors (31). Two tunable fiber grating rows (21) of multiple Bragg fiber gratings, in other words, two four-turn photoreactors (31) between R2 and L2 and their relative to λ ₂ , λ ₆ , λ ₁₀ ... An adjustable fiber grating array (21), two four-turn photoreactors (31) between R3 and L3, and two adjustable fiber grating columns (21), R4 with respect to λ ₃ , λ ₇ , λ ₁₁ ... Two four-turn photoreactors are placed between L4 and three adjustable fiber grating rows (21) with respect to λ ₄ , λ ₈ , λ ₁₂ ... via respective 埠 [L2, L3 and L4 or R2, R3 and R4 Wavelength-demultiplexed wavelength signal enters the corresponding multi-adjustable Bragg fiber grating tunable fiber grating column (21) via a four-turn photoreactor (31) to determine whether to reflect the wavelength signal for the removal mechanism. To extract the wavelength signal, the tunable fiber grating column (21) through the Bragg fiber grating reflects the wavelength signal to the second NxN (N=4) arrayed waveguide grating (12) below, and from the second NxN ( N=4) The wavelength signal input to the right of the arrayed waveguide grating (12), through the routing rule of the NxN arrayed waveguide grating module (1) [as shown in the fourth figure], performs the wavelength multiplexing mechanism with the corresponding wavelength input. We can get the wavelength signal from Drop1. At this time, we can input this 埠 from the same wavelength as the input Add from Add1埠, and the wavelength input by Add1埠 also passes through the second NxN below (N=4 The arrayed waveguide grating (12) performs a wavelength demultiplexing task, which is then reflected by the four-turn photoreactor (31) to the corresponding Bragg fiber grating tunable fiber grating column (21), and then reflected The wavelength signal will go to the first NxN (N=4) arrayed waveguide grating (11). The routing rule of the NxN arrayed waveguide grating module (1) is used to perform the wavelength multiplexing mechanism with the corresponding wavelength input. We can get from In1. /Out2 gets the wavelength signal added by Add1. However, if we do not take out the wavelength signal input from In1/Out2, then the Bragg fiber grating adjustable fiber grating column (21) should not be adjusted to the corresponding wavelength signal. Wavelength to avoid reflection The long signal allows the wavelength signal to pass directly through the tunable fiber grating column (21) to the left of the first NxN (N=4) arrayed waveguide grating (11) to perform the wavelength multiplex mechanism as the joining mechanism. Similarly, via the routing rules of the NxN arrayed waveguide grating module (1), the wavelength multiplexing algorithm is performed with the corresponding wavelength input. We can get the wavelength signal input by In1/Out2 from In2/Out1, and from In2/Out1. The input wavelength signal is the same as the Add-Drop take-out principle of the wavelength signal from In1/Out2.

The two-way reconfigurable optical signal plug-in multiplexer shown in the second figure can allow white light wavelength signals, but cannot manage wavelength signals λ ₁ , λ ₅ , λ ₉ ... etc., but can be appropriately Different combinations of 来 allow to manage wavelength signals λ ₁ , λ ₅ , λ ₉ ... etc., as shown in the third figure, but the architecture shown in the third figure cannot manage the wavelength signals λ ₄ , λ ₈ , λ ₁₂ ... etc. After connecting the second and third diagrams in series, all wavelength signals can be managed.

In view of the above, the present invention is directed to a bidirectional all-optical full-frequency optical wavelength configuration routing device application technology, in particular, comprising an NxN array waveguide grating module (1), a fiber grating module (2), A bidirectional all-optical full-frequency optical wavelength configuration routing device of a first photoreceiver module (3) and a second photoreceiver module (4) is connected to the first by an NxN array waveguide grating module (1) a returning light module (3) and a second light returning module (4), and the first light returning module (3) is coupled to the fiber grating module (2), using only a pair of NxN arrayed waveguide gratings and Under the condition of multiple adjustable Bragg fiber gratings, a bidirectional configuration wavelength routing mechanism is achieved.

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

(1). . . NxN array waveguide grating module

(11). . . First NxN array waveguide grating

(111). . . Link

(12). . . Second NxN array waveguide grating

(121). . . Link

(2). . . Fiber grating module

(twenty one). . . Adjustable fiber grating column

(211). . . Adjustable fiber grating

(3). . . First light return module

(31). . . Four-turn light return

(311). . . Link

(4). . . Second light return module

(41). . . Three-turn photoreactor

(411). . . Link

First: A schematic diagram of a connection architecture of a bidirectional all-optical full-frequency optical wavelength configuration configuration routing device according to an embodiment of the present invention.

The second figure is a schematic diagram of the connection of the first single-group bidirectional all-optical full-frequency optical wavelength configuration configuration routing device according to an embodiment of the present invention.

The third figure is a schematic diagram of the connection of the second single-group bidirectional all-optical full-frequency optical wavelength configuration configuration routing device according to an embodiment of the present invention.

The fourth figure is a schematic diagram of the filter wavelength corresponding to the input chirp and the output chirp of the NxN array waveguide grating of the present invention.

(1). . . NxN array waveguide grating module

(11). . . First NxN array waveguide grating

(111). . . Link

(12). . . Second NxN array waveguide grating

(121). . . Link

(2). . . Fiber grating module

(twenty one). . . Adjustable fiber grating column

(211). . . Adjustable fiber grating

(3). . . First light return module

(31). . . Four-turn light return

(311). . . Link

(4). . . Second light return module

(41). . . Three-turn photoreactor

(411). . . Link

Claims (4)

A bidirectional all-optical full-frequency optical wavelength configuration routing device g4, comprising:
An NxN arrayed waveguide grating module has a first NxN arrayed waveguide grating and a second NxN arrayed waveguide grating, the first NxN arrayed waveguide grating and the second NxN arrayed waveguide grating each comprising 2N connected ports, and the first Two of the NxN arrayed waveguide gratings are connected as In/Out埠;
A fiber grating module having 2 (N-1) adjustable fiber grating columns, the adjustable fiber grating columns each comprising a plurality of adjustable fiber gratings;
A first photoreceiver module has 2 (N-1) four-turn photoreactors, and the four-turn photoreactor comprises four connecting ports, and two of the two four-turn photoreactors are connected. Interconnecting two adjustable fiber grating columns, and the other two connecting wires are respectively connected to corresponding links of the first NxN arrayed waveguide grating and the second NxN arrayed waveguide grating;
A second photoreceiver module has two three-turn photoreactors, and the three-turn photoreactor comprises three interlocking ports, two of which are respectively an Add埠 and a Drop埠, and the other is a link Connected to the second NxN arrayed waveguide grating. The bidirectional all-optical full-frequency optical wavelength configuration routing device according to claim 1, wherein the order of the NxN is more than four orders. The bidirectional all-optical full-frequency optical wavelength configuration routing device according to claim 1, wherein the In/Out埠 of the first NxN arrayed waveguide grating has a symmetrical characteristic of bidirectional output and input. The bidirectional all-optical full-frequency optical wavelength configuration routing device according to claim 1, wherein the plurality of adjustable fiber grating columns of the adjustable fiber grating column are Bragg fiber gratings.