CN108169858B - Multi-wavelength selection switch - Google Patents

Multi-wavelength selection switch Download PDF

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Publication number
CN108169858B
CN108169858B CN201810016439.1A CN201810016439A CN108169858B CN 108169858 B CN108169858 B CN 108169858B CN 201810016439 A CN201810016439 A CN 201810016439A CN 108169858 B CN108169858 B CN 108169858B
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China
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deflection
device
dimension
optical signal
sub
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CN201810016439.1A
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CN108169858A (en
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肖峰
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贝耐特光学科技(昆山)有限公司
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/35Optical coupling means having switching means
    • G02B6/354Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/3542Non-blocking switch, e.g. with multiple potential paths between multiple inputs and outputs, the establishment of one switching path not preventing the establishment of further switching paths

Abstract

The invention discloses a multi-wavelength selective switch. The multi-wavelength selective switch comprises an input/output device, a light beam adjusting device, a dispersion device, a multi-center deflection conversion device, a focusing device and a deflection device; wherein the input-output device comprises at least two groups of input-output arrays and is stacked along the deflection dimension of the optical signal; the multi-center deflection conversion device comprises at least two deflection conversion sub-devices, each deflection conversion sub-device comprises a deflection conversion device comprising at least one section, the section is vertical to the deflection dimension of the optical signal, and the sections of the two adjacent deflection conversion sub-devices are adjacently arranged on the deflection dimension of the optical signal; the number of deflection conversion sub-devices is the same as the number of input-output arrays. The multi-wavelength selective switch provided by the invention can realize a plurality of independent wavelength selective switches and has the advantages of simple structure and low cost.

Description

Multi-wavelength selection switch

Technical Field

The embodiment of the invention relates to the field of optical communication, in particular to a multi-wavelength selective switch.

Background

With the rapid development of mobile broadband, video, cloud service and the like, the global bandwidth demand is explosively increased, great pressure is brought to the bandwidth of a transmission network, the bandwidth is flexibly, quickly and intelligently changed into the direction of upgrading and evolution of an optical network, and a wavelength selection switch is a core component in the bandwidth. In general, one optical network node needs to configure a plurality of wavelength selective switches, which puts a great strain on the cost and the cabinet space of an operator.

The dual-wavelength selective switch is realized by adding a small number of components on the basis of a single wavelength selective switch component, and two sets of mutually independent wavelength selective switch components are realized. At present, the dual-wavelength selective switch technology mainly transforms two input optical signals into polarization states perpendicular to each other, and separates the two input optical signals by using different polarization states, so that the two input optical signals are located at different height positions of a deflection device, and the deflection device can independently process the two optical signals to realize the dual-wavelength selective switch.

The method needs to arrange an additional polarization processing module to convert input signals of two wavelength selection switches into two polarization states which are perpendicular to each other, and then separates the two input optical signals through a polarization splitting crystal, and generally requires a dispersion device to have high diffraction efficiency for the two polarization states at the same time, so that the structure is complex and the cost is high. Moreover, the input signal is converted into the optical signals in two polarization states perpendicular to each other, that is, the method is determined to be capable of realizing only a two-wavelength selective switch, and cannot realize a multi-wavelength selective switch.

Disclosure of Invention

The invention provides a multi-wavelength selective switch, which modifies a deflection conversion device on the basis of a single wavelength selective switch without changing the parameters and positions of other components and realizes a plurality of sets of mutually independent wavelength selective switch devices.

The embodiment of the invention provides a multi-wavelength selective switch, which comprises: the device comprises an input and output device, a light beam adjusting device, a dispersion device, a multi-center deflection conversion device, a focusing device and a deflection device;

the input and output device is used for inputting and outputting light beams; the input and output device comprises at least two groups of input and output arrays which are stacked along the deflection dimension of the optical signal; each set of the input-output arrays comprises at least one input port and at least one output port, the input ports and the output ports being arranged along the optical signal deflection dimension; the optical signal deflection dimension is the dimension of switching an optical signal from an input port to an output port;

the light beam adjusting device is used for adjusting the light beam incident through the input port;

the dispersion device is used for separating the light with different wavelengths in the light beam in an optical signal dispersion dimension, wherein the optical signal dispersion dimension is vertical to the optical signal deflection dimension;

the multi-center deflection conversion device is used for collimating the light beam in the optical signal deflection dimension; the multi-center deflection conversion device comprises at least two groups of deflection conversion sub-devices, each group of deflection conversion sub-devices comprises a deflection conversion device which is cut off in at least one cut-off surface, the cut-off surface is vertical to the deflection dimension of the optical signal, and the cut-off surfaces of two adjacent groups of deflection conversion sub-devices are adjacently arranged in the deflection dimension of the optical signal; the number of the deflection conversion sub-devices is the same as that of the input and output arrays;

the focusing device is used for focusing the light with different wavelengths separated in the optical signal dispersion dimension after passing through the chromatic dispersion device on the deflection device;

the deflection device is used for deflecting light with a set wavelength in the light beam at a preset angle in the optical signal deflection dimension;

optionally, in the optical signal deflection dimension, the optical center distance of the deflection converting sub-devices located at two ends of the multi-center deflection converting device is h;

the deflection means comprises a signal processing window having a size D in the optical signal deflection dimension;

the light spot size of the light beam on the signal processing window of the deflection device is d;

wherein (n-1) D is not less than h and not more than D-D, and n is the number of the neutron wavelength selective switches in the multi-wavelength selective switch.

Optionally, the multi-center deflection converting device includes a first deflection converting sub-device and a second deflection converting sub-device, and the first deflection converting sub-device and the second deflection converting sub-device are stacked in the optical signal deflection dimension;

said first deflection converting sub-means comprises a deflection converting means truncated at a first cross-sectional plane perpendicular to said optical signal deflection dimension; said second deflection converting sub-means comprises deflection converting means truncated at a second truncation plane perpendicular to said optical signal deflection dimension;

in the optical signal deflection dimension, the distance between the optical center of the first deflection conversion sub-device and the first cross-sectional plane is h 1; the distance between the optical center of the second deflection conversion sub-device and the second truncation surface is h 2; wherein h is h1+ h 2.

Optionally, the multi-center deflection converting device includes a first deflection converting sub-device, a second deflection converting sub-device, and a third deflection converting sub-device, and the first deflection converting sub-device, the third deflection converting sub-device, and the second deflection converting sub-device are stacked in the optical signal deflection dimension;

said first deflection converting sub-means comprises a deflection converting means truncated at a first cross-sectional plane perpendicular to said optical signal deflection dimension; said second deflection converting sub-means comprises deflection converting means truncated at a second truncation plane perpendicular to said optical signal deflection dimension; said third deflection converting sub-means comprises deflection converting means truncated at third and fourth truncation planes perpendicular to said optical signal deflection dimension;

in the optical signal deflection dimension, the distance between the optical center of the first deflection conversion sub-device and the first cross-sectional plane is h 1; the distance between the optical center of the second deflection conversion sub-device and the second truncation surface is h 2; the distance between the optical center of the third deflection conversion sub-device and the third section surface is h31, and the distance between the optical center of the third deflection conversion sub-device and the fourth section surface is h 32; wherein h is h1+ h2+ h31+ h 32.

Optionally, the input/output device at least includes a first input/output array and a second input/output array, and the multi-center deflection converting device at least includes a first deflection converting sub-device corresponding to the first input/output array and a second deflection converting sub-device corresponding to the second input/output array;

optionally, the deflection converting sub-device is at least one of a cylindrical lens, a cylindrical lens group, a cylindrical concave mirror, a lens and a lens group.

Optionally, the input port and the output port include an optical fiber and a lens located at a preset distance from the optical fiber port, the optical fiber is used for inputting and outputting light beams, and the lens is used for limiting the light beam divergence.

Optionally, the beam adjusting apparatus includes a polarization processing component and a beam shaping component;

the polarization processing assembly comprises a polarization beam splitting sub-assembly and a half-wave plate, and the polarization beam splitting sub-assembly is used for splitting the light beam into a first light beam and a second light beam with mutually perpendicular polarization directions; the half-wave plate is used for converting the polarization direction of the second light beam to be consistent with the polarization direction of the first light beam;

the beam shaping component is used for expanding and collimating the light beam in the optical signal dispersion dimension.

Optionally, the focusing means comprises at least one cylindrical lens having a refractive power direction in the optical signal dispersion dimension.

Optionally, the deflection device comprises liquid crystal on silicon, a spatial optical phase modulator, a liquid crystal or a micro-electromechanical system.

The multi-wavelength selective switch provided by the embodiment of the invention is characterized in that an input/output device comprises at least two groups of input/output arrays, a multi-center deflection conversion device comprises at least two groups of deflection conversion sub-devices, each group of deflection conversion sub-device comprises a deflection conversion device comprising at least one section, the section is vertical to the deflection dimension of an optical signal, the sections of two adjacent groups of deflection conversion sub-devices are adjacently arranged on the deflection dimension of the optical signal, each group of deflection conversion sub-devices is used for collimating the input and output light beams in the input/output arrays in the deflection dimension of the optical signal and converting the optical signal light beams deflected by the deflection device into parallel optical axes to be transmitted and coupled into an output port, parameters and positions of other components are not required to be changed, the number of wavelength selections is increased in the same device package, and a plurality of wavelength selective switches capable of independently working are realized, this multi-wavelength selective switch simple structure compares with traditional dual wavelength selective switch, does not need complicated polarization processing module, does not also require the chromatic dispersion device to all possess high diffraction efficiency to two polarizations, has reduced the degree of difficulty and cost, possesses better market application scene.

Drawings

Fig. 1 is a schematic structural diagram of a single wavelength selective switch provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure of the single wavelength selective switch optical signal of FIG. 1 in the deflection dimension;

FIG. 3 is a schematic diagram of the structure of the single wavelength selective switch optical signal of FIG. 1 in the dispersive dimension;

fig. 4 is a schematic structural diagram of a three-wavelength selective switch according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the dimensional relationship of the three wavelength selective switch of FIG. 4;

fig. 6 is a schematic structural diagram of a dual-wavelength selective switch provided in an embodiment of the present invention;

FIG. 7 is a schematic diagram of a method of forming the dual-center deflection switching device of FIG. 6;

FIG. 8 is a schematic diagram of a method of forming the tri-center deflection conversion device of FIG. 4;

fig. 9 is a schematic structural diagram of another dual-wavelength selective switch provided in the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a single wavelength selective switch according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of the single wavelength selective switch in fig. 1 in an optical signal deflection dimension, fig. 3 is a schematic structural diagram of the single wavelength selective switch in fig. 1 in an optical signal dispersion dimension, and the following briefly introduces a structure and an operation principle of the single wavelength selective switch with reference to fig. 1 to 3. As shown in fig. 1, the single wavelength selective switch includes an input/output device 11, an optical beam adjusting device 12, a dispersion device 13, a deflection conversion device 14, a focusing device 15, and a deflection device 16 arranged as shown in the figure, where the input/output device 11 includes an input port 111 and an output port 112, the input port 111 and the output port 112 are arranged along an optical signal deflection dimension, which is a dimension in which an optical signal is switched to the output port 112, such as a Y direction shown in fig. 1. An input port 111 of the input/output device 11 outputs a wavelength division multiplexed optical beam signal, which is adjusted to be linearly polarized in a single polarization state by an optical beam adjusting device 12, and is dispersed in an optical signal dispersion dimension by a dispersion device 13, that is, the wavelength division multiplexed optical beam is dispersed and propagated by optical signals of different wavelengths, wherein the optical signal dispersion dimension is perpendicular to the optical signal deflection dimension, for example, the Z direction shown in fig. 1, after passing through a deflection device 14, the optical signals of different wavelengths are collimated in the optical signal deflection dimension (not shown in the figure), and further, when the dispersed and propagated optical signals of different wavelengths are adjusted to be incident and reflected on different positions of the dispersion dimension of a deflection device 16 in parallel to each other in the optical signal dispersion dimension by a focusing device 15, and the deflection device 16 deflects light of a set wavelength in the optical signal deflection dimension at a corresponding position, and then the light of the set wavelength passes through the deflection conversion device 14, the direction of propagation is changed to be parallel to the optical axis of the original wavelength division multiplexed beam so that the light of the set wavelength is coupled into the target output port of the input-output device to achieve the selected output of the wavelength. The light beams with different wavelengths in the wavelength division multiplexing light beam can be deflected by the deflection device 16 at respective deflection angles and output.

The single wavelength selective switch shown in fig. 1 can realize the wavelength selective switching function of a single set of optical signals, on the basis of the single wavelength selective switch, an additional polarization processing module is arranged in the prior art to convert the input signals of two wavelength selective switches into two polarization states which are perpendicular to each other, and then the two input optical signals are separated and independently processed through a polarization splitting crystal, so that the dual wavelength selective switch is realized on the basis of adding a small number of components. One of the most direct approaches to multi-wavelength selective switches is to stack two or more single-wavelength selective switches one on top of the other, so that two or more original input/output devices are stacked one on top of the other at a certain distance, two or more original deflection converting devices are stacked one on top of the other, and the height of all other components is doubled, so as to realize a dual-wavelength selective switch or a multi-wavelength selective switch.

Based on this, the embodiment of the present invention provides a multi-wavelength selective switch, which includes an input/output device, a beam adjusting device, a dispersion device, a multi-center deflection converting device, a focusing device and a deflecting device; the input and output device is used for inputting and outputting light beams; the input and output device comprises at least two groups of input and output arrays which are stacked along the deflection dimension of the optical signal; each set of input-output arrays comprises at least one input port and at least one output port, the input ports and the output ports being arranged along an optical signal deflection dimension; the optical signal deflection dimension is the dimension of switching an optical signal from an input port to an output port; the light beam adjusting device is used for adjusting the light beam incident through the input port; the dispersion device is used for separating the light with different wavelengths in the light beam on an optical signal dispersion dimension, wherein the optical signal dispersion dimension is vertical to the optical signal deflection dimension; the multi-center deflection conversion device is used for collimating the light beam in the optical signal deflection dimension; the multi-center deflection conversion device comprises at least two deflection conversion sub-devices, each deflection conversion sub-device comprises a deflection conversion device with at least one truncated surface, the truncated surface is vertical to the deflection dimension of the optical signal, and the truncated surfaces of two adjacent deflection conversion sub-devices are adjacently arranged on the deflection dimension of the optical signal; the number of the deflection conversion sub-devices is the same as that of the input and output arrays and corresponds to that of the input and output arrays one by one; the focusing device is used for focusing the light with different wavelengths separated on the optical signal dispersion dimension after the light is dispersed on the deflection device; the deflection device is used for deflecting light with a set wavelength in the light beam at a preset angle in the deflection dimension of the optical signal. According to the technical scheme of the embodiment of the invention, parameters and positions of other components are not required to be changed, the number of the wavelength selective switches is increased in the same component package, and a plurality of sub-wavelength selective switches capable of working independently are realized, wherein each sub-wavelength selective switch can realize all functions of a single wavelength selective switch in the prior art. This multi-wavelength selective switch simple structure compares with traditional dual wavelength selective switch, does not need complicated polarization processing module, does not also require the chromatic dispersion device to all possess high diffraction efficiency to two polarizations, has reduced the degree of difficulty and cost, saves space simultaneously, possesses better market using value.

The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. Based on the embodiments of the present invention, those skilled in the art can obtain all other embodiments, such as embodiments that implement the same optical functions as those of the present invention, without making creative efforts, for example, reasonable changes to the optical devices and the contextual settings, and all embodiments are within the protection scope of the present invention.

Fig. 4 is a schematic structural diagram of a multi-wavelength selective switch according to an embodiment of the present invention, and fig. 4 illustrates a three-wavelength selective switch as an example. Referring to fig. 4, the three wavelength selective switch includes an input-output device 41, a beam adjusting device 42, a dispersion device 43, a three-center deflection converting device 44, a focusing device 45, and a deflecting device 46; wherein, the input/output device 41 is used for inputting and outputting light beams; the optical signal deflection circuit comprises three groups of input and output arrays 411, 413 and 412, wherein each group of input and output arrays corresponds to a sub-wavelength selection switch, and the three groups of input and output arrays 411, 413 and 412 are stacked along the deflection dimension of an optical signal, such as the Y direction shown in FIG. 4; each set of input-output arrays, e.g., 411, includes at least one input port 4111 and at least one output port 4112, the input port 4111 and the output port 4112 being arranged along an optical signal deflection dimension; the optical signal deflection dimension is the dimension in which an optical signal switches from an input port 4111 to an output port 4112; the beam adjusting device 42 is configured to adjust the beam incident to the input port 4111; the dispersion device 43 separates the different wavelengths of light in the optical beam in the optical signal dispersion dimension; a three-center deflection conversion device 44 for collimating the beam in the optical signal deflection dimension; the multi-center deflection converting means 44 comprises three sets of deflection converting sub-means 441, 443, 442, each set of deflection converting sub-means comprising a deflection converting means comprising at least one truncation of a truncation plane perpendicular to the optical signal deflection dimension, the truncation planes of two adjacent sets of deflection converting sub-means being adjacently arranged in the optical signal deflection dimension; the deflection conversion sub-devices 441, 443, 442 are in one-to-one correspondence with the input-output arrays 411, 413, 412; the focusing device 45 is used for focusing the light of different wavelengths separated in the optical signal dispersion dimension after passing through the dispersion device 43 on the deflection device 46; the deflection device 46 is used to deflect light of a set wavelength in the optical beam at a preset angle in the optical signal deflection dimension.

The deflection converting sub-device is generated by performing a truncation process on a conventional deflection converting device, wherein the truncation process is to shorten the optical center-to-center distances of the three deflection converting sub-devices, so that the signal processing window of the deflection device 46 can simultaneously accommodate the input optical signals of the three wavelength selective switches. Referring to fig. 4, in the optical signal deflection dimension, the adjacent arrangement of the cut-off surfaces of the three adjacent deflection converting sub-devices means that the cut-off surfaces of the adjacent deflection converting sub-devices are oppositely and closely arranged in the optical signal deflection dimension, so that the optical centers of the three deflection converting sub-devices are reasonably distributed in the deflection dimension, and thus, the light beams input from different sub-wavelength selective switches do not overlap or exceed the window range on the signal processing window of the deflection device.

As shown in fig. 4, the input/output device 41 includes three sets of input/output arrays 411, 413, 412, and correspondingly, the three-center deflection converting device 44 includes three sets of deflection converting sub-devices 441, 443, 442, the number of the deflection converting sub-devices is the same as that of the input/output arrays and corresponds to one another, so as to ensure that the three wavelength selective switches provided by the embodiment of the present invention can simultaneously implement three sets of independent wavelength selective switches; in the optical signal deflection dimension, the deflection conversion sub-devices are cut off, and then the cut-off surfaces of different deflection conversion sub-devices are arranged in a pasting manner, so that the three deflection conversion sub-devices are compactly arranged, and the wavelength division multiplexing light beams incident from the input and output arrays of the sub-wavelength selection switches are ensured not to overlap or exceed the signal processing window range of the deflection device 46 in the optical signal deflection dimension when reaching the deflection device 46. In summary, the embodiment of the invention modifies the deflection conversion device of the single wavelength selective switch into the three-center deflection conversion device on the basis of the single wavelength selective switch without changing the parameters and positions of other functional modules, and realizes three sets of independent wavelength selective switches under the same packaging size by sharing other functional modules, and the three-center deflection conversion device has the advantages of simple structure, low cost and better market application scene.

Fig. 5 is a schematic size relationship diagram of the three-wavelength selective switch shown in fig. 4, referring to fig. 5, in the optical signal deflection dimension, as shown in the Y direction in fig. 5, the distance between the optical centers 400 of the deflection converting sub-devices at the two ends of the three-center deflection converting device 44 is h, the deflection device 46 includes a signal processing window 460, the extension length of the signal processing window 460 in the optical signal deflection dimension is D, the spot size of the optical beam 100 at the signal processing window 460 in the optical signal deflection dimension is D, and in order to ensure that the two optical beams 100 at the two edge positions in the optical signal deflection dimension can be incident into the signal processing window 460 of the deflection device 46, the deflection converting sub-devices at the two ends of the three-center deflection converting device 44 are set to satisfy h + 2D/2 ≦ D. Besides, in order to ensure that the input light beams do not interfere with each other and do not overlap with each other, h ≧ (n-1) d is required to be satisfied, where n is the number of the deflection converting sub-devices. It should be noted that the embodiments of the present invention are described by taking an example in which the light beams passing through the different input/output arrays 411, 413, and 412 have light spots with the same size in the optical signal deflection dimension.

Fig. 6 is a schematic structural diagram of a dual-wavelength selective switch according to an embodiment of the present invention, and fig. 6 illustrates the dual-wavelength selective switch as an example; fig. 7 is a schematic diagram of a method of forming the dual-center deflection converting device of fig. 6, and referring to fig. 6-7, optionally, the dual-center deflection converting device includes a first deflection converting sub-device 641 and a second deflection converting sub-device 642, the first deflection converting sub-device 641 and the second deflection converting sub-device 642 being stacked in the optical signal deflection dimension; the first deflection converting sub-means 641 includes a deflection converting means truncated at a first cross-sectional plane perpendicular to the optical signal deflection dimension; second deflection conversion sub-means 642 comprises deflection conversion means truncated at a second truncation plane perpendicular to the optical signal deflection dimension; in the optical signal deflection dimension, the distance between the optical center of the first deflection converting sub-device 641 and the first cross-sectional plane is h 1; the distance between the optical center of the second deflection converting sub-device 642 and the second truncated surface is h 2; here, h is h1+ h2, that is, the first deflection converting sub-device 641 is truncated by the position h1 from the optical center of the original deflection converting device, the second deflection converting sub-device 642 is truncated by the position h2 from the optical center of the original deflection converting device, and the truncated surfaces of the first deflection converting sub-device 641 and the second deflection converting sub-device 642 are closely arranged to form the double-center deflection converting device 64.

Fig. 8 is a schematic diagram of a method for forming the three-centered deflection converting device in fig. 4, and referring to fig. 4 and 8, optionally, the three-centered deflection converting device 44 includes a first deflection converting sub-device 441, a second deflection converting sub-device 442 and a third deflection converting sub-device 443, and the first deflection converting sub-device 441, the third deflection converting sub-device 443 and the second deflection converting sub-device 442 are stacked in an optical signal deflection dimension; the first deflection converting sub-means 441 comprises a deflection converting means truncated at a first cross-sectional plane perpendicular to the optical signal deflection dimension; the second deflection conversion sub-means 442 comprises deflection conversion means truncated at a second truncation plane perpendicular to the optical signal deflection dimension; the third deflection converting sub-means 443 comprise deflection converting means truncated at a third and a fourth truncation plane perpendicular to the deflection dimension of the optical signal; the distance between the optical center of the first deflection converting sub-device 441 and the first cross-sectional plane in the optical signal deflection dimension is h 1; the distance between the optical center of the second deflection converting sub-device 442 and the second truncated surface is h 2; the distance between the optical center of the third deflection conversion sub-device and the third section surface is h31, and the distance between the optical center of the third deflection conversion sub-device and the fourth section surface is h 32; similarly, the three deflection conversion sub-devices in the three-center deflection conversion device are each formed by the deflection conversion device of the single wavelength selective switch by cutting a section surface at a certain distance from the optical center, and are stacked in the optical signal deflection dimension.

Fig. 9 is a schematic structural diagram of another multiple-dual wavelength selective switch provided in an embodiment of the present invention, and referring to fig. 9, for convenience, first, a light beam obtained by geometrically reflecting an input wavelength division multiplexing light beam along a deflection device 96 is referred to as a zero-order light beam, and it should be noted that when a certain set wavelength is deflected by the deflection device 96, the deflection of the certain set wavelength in an optical signal deflection dimension is relative to the zero-order light beam. In addition, for example, when the optical centers of the input port 9111 and the correspondingly disposed deflection converting sub-device 941 are at the same height in the deflection dimension, it is obvious that the zero-order beam will return along the original optical path. Alternatively, the input/output device 91 includes at least a first input/output array 911 and a second input/output array 912, and the bi-center deflection converting device 94 includes at least a first deflection converting sub-device 941 corresponding to the first input/output array 911 and a second deflection converting sub-device 942 corresponding to the second input/output array 912; in the optical signal deflection dimension, as shown in the Y direction in fig. 9, the input port 9111 in the first input/output array 911 is located on the side of the optical center of the first deflection conversion sub-device 941 close to the second deflection conversion sub-device 942, and most of the output ports 9112 in the first input/output array are located on the side of the optical center of the first deflection conversion sub-device 941 away from the second deflection conversion sub-device 942; in the optical signal deflection dimension, the input port 9121 in the second input-output array 912 is located on the side of the optical center of the second deflection conversion sub-device 942 close to the first deflection conversion sub-device 941, and most of the output ports 9122 in the second input-output array are located on the side of the optical center of the second deflection conversion sub-device 942 far from the first deflection conversion sub-device 941. The multi-wavelength selective switch provided by the embodiment of the invention can adjust the position of each zero-order light beam relative to the input/output port by respectively adjusting the relative height of the port position in the input/output array and the optical center of the corresponding deflection conversion sub-device, so as to optimize the performance parameters of the multi-wavelength selective switch, that is, the height position of the input port in the input/output array in the deflection dimension can be set at the upper side or the lower side of the optical center of the corresponding deflection conversion sub-device. It should be noted that, since the size of the signal processing window of the deflection device in the deflection dimension is limited, the light beams input from different input/output arrays can neither overlap nor exceed the window range on the signal processing window of the deflection device, so that the positions of the extended lines of the optical centers of the respective deflection converting sub-devices on the signal processing window need to be reasonably distributed.

Alternatively, with continued reference to fig. 4, the deflection converting sub-apparatus provided in the embodiment of the present invention may be at least one of a cylindrical lens, a cylindrical lens group, a cylindrical concave mirror, a lens, and a lens group.

Alternatively, the input port 411 and the output port 412 may be a combination of an optical fiber for inputting and outputting light beams and a lens for collimating the light beams, which are located at a set distance from the optical fiber port.

Alternatively, the beam modification device 42 may include a polarization processing component and a beam shaping component. The polarization processing assembly comprises a polarization beam splitting sub-assembly and a half-wave plate, the polarization beam splitting sub-assembly is used for splitting the light beam into a first light beam and a second light beam, the polarization directions of the first light beam and the second light beam are perpendicular to each other, and the polarization beam splitting assembly can be a birefringent crystal exemplarily; the half-wave plate is used for converting the polarization direction of the second light beam to be consistent with the polarization direction of the first light beam. The light beam can be expanded and collimated on the optical signal dispersion dimension through the light beam shaping assembly.

Alternatively, the focusing device 45 may include at least one of a cylindrical lens, a cylindrical lens group, and a lens group having at least one refractive power direction in the optical signal dispersion dimension. The deflection device 46 may be a liquid crystal on silicon, a spatial optical phase modulator, a liquid crystal or a micro-electromechanical system, etc.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A multi-wavelength selective switch, comprising: the device comprises an input and output device, a light beam adjusting device, a dispersion device, a multi-center deflection conversion device, a focusing device and a deflection device;
the input and output device is used for inputting and outputting light beams; the input and output device comprises at least two groups of input and output arrays which are stacked along the deflection dimension of the optical signal; each set of the input-output arrays comprises at least one input port and at least one output port, the input ports and the output ports being arranged along the optical signal deflection dimension; the optical signal deflection dimension is the dimension of switching an optical signal from an input port to an output port;
the light beam adjusting device is used for adjusting the light beam incident through the input port;
the dispersion device is used for separating the light with different wavelengths in the light beam in an optical signal dispersion dimension, wherein the optical signal dispersion dimension is vertical to the optical signal deflection dimension;
the multi-center deflection conversion device is used for collimating the light beam in the optical signal deflection dimension; the multi-center deflection conversion device comprises at least two groups of deflection conversion sub-devices, each group of deflection conversion sub-devices comprises a deflection conversion device comprising at least one section, the section is vertical to the deflection dimension of the optical signal, and the sections of two adjacent groups of deflection conversion sub-devices are adjacently arranged on the deflection dimension of the optical signal; the number of the deflection conversion sub-devices is the same as that of the input and output arrays;
the focusing device is used for focusing the light with different wavelengths separated in the optical signal dispersion dimension after passing through the chromatic dispersion device on the deflection device;
the deflection device is used for deflecting light with set wavelength in the light beam at a preset angle in the optical signal deflection dimension.
2. The multiwavelength select switch of claim 1, wherein the deflection switch sub-means at either end of the multi-center deflection switch means have an optical center distance h in the optical signal deflection dimension;
the deflection means comprises a signal processing window having a size D in the optical signal deflection dimension;
the size of the light spot of the light beam on the signal processing window of the deflection device in the deflection dimension of the optical signal is d;
wherein (n-1) D is not less than h and not more than D-D, and n is the number of the deflection conversion sub-devices.
3. The multiwavelength select switch of claim 2, wherein the multi-center deflection switch means comprises first and second deflection switch sub-means arranged in a stack in the optical signal deflection dimension;
said first deflection converting sub-means comprises a deflection converting means truncated at a first cross-sectional plane perpendicular to said optical signal deflection dimension; said second deflection converting sub-means comprises deflection converting means truncated at a second truncation plane perpendicular to said optical signal deflection dimension;
in the optical signal deflection dimension, the distance between the optical center of the first deflection conversion sub-device and the first cross-sectional plane is h 1; the distance between the optical center of the second deflection conversion sub-device and the second truncation surface is h 2; wherein h is h1+ h 2.
4. The multiwavelength select switch of claim 2, wherein the multi-center deflection switch means comprises a first deflection switch sub-means, a second deflection switch sub-means, and a third deflection switch sub-means, the first deflection switch sub-means, the third deflection switch sub-means, and the second deflection switch sub-means being arranged in a stack in the optical signal deflection dimension;
said first deflection converting sub-means comprises a deflection converting means truncated at a first cross-sectional plane perpendicular to said optical signal deflection dimension; said second deflection converting sub-means comprises deflection converting means truncated at a second truncation plane perpendicular to said optical signal deflection dimension; said third deflection converting sub-means comprises deflection converting means truncated at a third and a fourth truncation plane perpendicular to said optical signal deflection dimension;
in the optical signal deflection dimension, the distance between the optical center of the first deflection conversion sub-device and the first cross-sectional plane is h 1; the distance between the optical center of the second deflection conversion sub-device and the second truncation surface is h 2; the distance between the optical center of the third deflection conversion sub-device and the third section surface is h31, and the distance between the optical center of the third deflection conversion sub-device and the fourth section surface is h 32; wherein h is h1+ h2+ h31+ h 32.
5. The multiwavelength select switch of claim 1, wherein the input-output means comprises at least a first input-output array and a second input-output array, and wherein the multi-center deflection switch means comprises at least a first deflection switch subset corresponding to the first input-output array and a second deflection switch subset corresponding to the second input-output array.
6. The multiwavelength select switch of claim 1, wherein the deflection switch sub-means is at least one of a lens and a group of lenses.
7. The multiwavelength select switch of claim 1, wherein the input port and the output port comprise an optical fiber for inputting and outputting light beams and a lens at a set distance from the fiber port for limiting beam divergence.
8. The multiwavelength selection switch of claim 1, wherein the beam shaping means comprises a polarization processing component and a beam shaping component;
the polarization processing assembly comprises a polarization beam splitting sub-assembly and a half-wave plate, and the polarization beam splitting sub-assembly is used for splitting the light beam into a first light beam and a second light beam with mutually perpendicular polarization directions; the half-wave plate is used for converting the polarization direction of the second light beam to be consistent with the polarization direction of the first light beam;
the beam shaping component is used for expanding and collimating the light beam in the optical signal dispersion dimension.
9. The multiwavelength select switch of claim 1, wherein the focusing means comprises at least one cylindrical lens having a power direction in the optical signal dispersion dimension.
10. The multiwavelength select switch of claim 1, wherein the deflection means comprises liquid crystal on silicon, spatial optical phase modulator, liquid crystal, or micro-electromechanical system.
CN201810016439.1A 2018-01-08 2018-01-08 Multi-wavelength selection switch CN108169858B (en)

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US6625346B2 (en) * 2001-03-19 2003-09-23 Capella Photonics, Inc. Reconfigurable optical add-drop multiplexers with servo control and dynamic spectral power management capabilities
US8346084B2 (en) * 2007-03-08 2013-01-01 Oclaro (North America), Inc. Optical device with stable optical configuration
US8190025B2 (en) * 2008-02-28 2012-05-29 Olympus Corporation Wavelength selective switch having distinct planes of operation
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