CN116560016A - Free space integrated device - Google Patents
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- CN116560016A CN116560016A CN202310386933.8A CN202310386933A CN116560016A CN 116560016 A CN116560016 A CN 116560016A CN 202310386933 A CN202310386933 A CN 202310386933A CN 116560016 A CN116560016 A CN 116560016A
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
- G02B6/4208—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4213—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being polarisation selective optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4286—Optical modules with optical power monitoring
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to the technical field of communication, and provides a free space integrated device. Wherein the device comprises a first collimating assembly, a second collimating assembly, a first reflecting assembly, and a wavelength adjusting assembly; the first collimation component, the attenuation adjustment component, the wavelength adjustment component and the second collimation component are sequentially coupled in an optical path; the first collimation component is used for collimating incident light; the second collimation component is used for collimating emergent light; the first reflection assembly is used for adjusting the coupling degree of the whole light path by adjusting the self placement angle, so that the light attenuation adjustment of emergent light is realized; the wavelength adjusting component is used for adjusting the wavelength of the emergent light. The invention realizes light attenuation adjustment through the position adjustment of the reflecting component, thereby realizing a high-integration device with free space, and further obtains a filtering component through the integration of the grating component and the reflecting component, thereby realizing an integration device with adjustable wavelength and adjustable attenuation.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a free space integrated device.
Background
With explosive development of applications such as big data cloud computing, artificial intelligence, 5G everything interconnection and the like, the network scale of the data center is continuously expanded, and the internal flow is rapidly increased. It is predicted that data center traffic doubles every three years, and accordingly, the bandwidth of the data center optical module must also double every three years. The current mainstream optical transceiver module in the market consists of a four-channel optical emission component and a four-channel optical detection component, namely, the optical emission component comprises 4 lasers for emitting four channels of light, each light is called a channel, the speed of each channel can reach 100Gb/s, such an optical transceiver module is generally called a 400G optical module, with the continuous development of network technology, the network scale is also continuously expanded, and the channels required to be supported by the optical module are also required to support more channels, such as an 800G optical module which is expected to rapidly increase in the coming years and become the mainstream of the market.
Similarly, with the upgrading iteration of the communication coherence technology, the packaging mode of the optical module is gradually derived from CFP2 to QSFP-DD (Quad Small Form Factor Pluggable-Double resolution), and the passive device requirements of a new generation with smaller size and higher integration level are induced. In the CFP2 module, there is a space for placing discrete devices, for example, independent pump lasers, erbium fibers, optical Isolators (ISO), tunable filters (TOF), tunable attenuators (VOA), spectroscopic detectors (TAPPD) and the like, but the integration level of the combination mode of the discrete devices in the prior art is not high, and the requirement of high integration level of the QSFP-DD module cannot be met.
In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art.
Disclosure of Invention
The invention aims to solve the technical problems that the integration level of the form of packaging of each discrete device in the prior art is not high, and the requirement of high integration level cannot be met.
The invention adopts the following technical scheme:
the invention provides a free space integrated device, which comprises a first collimation component 1, a second collimation component 2, a first reflection component 3 and a wavelength adjusting component 4;
the first collimation component 1, the first reflection component 3, the wavelength adjusting component 4 and the second collimation component 2 are sequentially in optical path coupling;
the first collimation component 1 is used for collimating incident light; the second collimation component 2 is used for collimating emergent light;
the first reflection assembly 3 is used for adjusting the coupling degree of the whole light path by adjusting the self placement angle so as to realize the light attenuation adjustment of emergent light;
the wavelength adjusting component 4 is used for adjusting the wavelength of the emergent light.
Preferably, the wavelength adjustment component 4 includes a first grating component 41, a second reflection component 42, and a second grating component 43;
the first grating assembly 41, the second reflection assembly 42 and the second grating assembly 43 are arranged in sequence;
the first grating assembly 41 is configured to diffract and split the passing light to obtain diffracted light with multiple wavelengths;
the second reflection component 42 is configured to adjust the angle at which the diffracted light enters the second grating component 43 by adjusting its placement angle;
the second grating element 43 is configured to filter light with a corresponding wavelength according to the angle at which the diffracted light is incident.
Preferably, the device further comprises an isolation assembly 5;
the isolation component 5 is disposed between the first collimating component 1 and the first reflecting component 3, and is used for optically isolating light opposite to the incident light.
Preferably, the isolation assembly 5 includes a magnetic ring 51, a first polarization detector 52, a second polarization detector 53, and an optical rotation medium 54 disposed in the magnetic ring 51;
the optical rotation medium 54 is disposed between the first polarization detector 52 and the second polarization detector 53;
the first polarization detector 52 and the second polarization detector 53 are used for selectively allowing light to pass or preventing light from passing according to the polarization direction of the light;
the magnetic ring 51 is used to provide an external magnetic field to the optically active medium 54, so that the light passing through the optically active medium 54 generates a magneto-optical effect, thereby changing the polarization direction of the light, and the incident light can pass through the second polarization detector 53, but the light opposite to the incident light cannot propagate to the first collimating component 1 through the first polarization detector 52, thereby realizing light isolation.
Preferably, the device further comprises a light detection assembly 6;
the light detection component 6 is disposed between the wavelength adjustment component 4 and the second collimation component 2, and is used for performing spectral detection on the emergent light so as to detect the light attenuation.
Preferably, the light detection assembly 6 includes a light splitting assembly 61 and a light detector 62;
the light splitting component 61 is configured to split the outgoing light to obtain a detection light, and the light detector 62 is configured to detect the size of the detection light, so as to obtain the size of the outgoing light according to the size of the detection light, thereby detecting the size of the attenuation amount of the light.
Preferably, the device further comprises a sealing assembly 7, and the first collimating assembly 1, the second collimating assembly 2, the first reflecting assembly 3 and the wavelength adjusting assembly 4 are all encapsulated inside the sealing assembly 7;
the sealing assembly 7 is provided with an input port for incident light to enter the first collimator assembly 1 and an output port for outgoing light to exit.
Preferably, the material of the sealing component 7 is metal or ceramic.
Preferably, the first alignment assembly 1 comprises a fixation sleeve 11, an optical fiber 12 arranged in the fixation sleeve 11, a capillary 13 and a lens 14;
one end of the optical fiber 12 is arranged at the outer end of the fixed sleeve 11, and the other end is inserted into the capillary 13;
the capillary 13 is butt-coupled with the lens 14, thereby forming an optical transmission channel between the optical fiber 12 and the lens 14.
Preferably, the first collimating assembly 1 and the second collimating assembly 2 are mode field matched.
Compared with the prior art, the invention has the beneficial effects that: the invention realizes the light attenuation adjustment through the position adjustment of the reflecting component by the mutual coordination of the collimating component and the reflecting component, thereby realizing a free space high-integration device, and in the preferred embodiment of the invention, the wavelength selection component is further obtained through the integration of the grating component and the reflecting component, thereby realizing the integration device with adjustable wavelength and adjustable attenuation.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first free-space integrated device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first alignment feature in a free-space integrated device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a second free-space integrated device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a third free-space integrated device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a isolation assembly in a free-space integrated device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a fourth free-space integrated device according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a free-space integrated device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a seal assembly in a free-space integrated device according to an embodiment of the present invention.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein:
1. a first alignment assembly; 11. fixing the sleeve; 12. an optical fiber; 13. a capillary tube; 14. a lens; 2. a second collimation assembly; 3. a first reflective component; 4. a wavelength adjustment assembly; 41. a first grating assembly; 42. a second reflective component; 43. a second grating assembly; 5. an isolation assembly; 51. a magnetic ring; 52. a first polarization detector; 53. a second polarization detector; 54. an optically active medium; 6. a light detection assembly; 61. a light splitting component; 62. a photodetector; 7. a seal assembly; 71. a main case; 72. a first case; 73. and a second case.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1:
with the development of communication technology, the optical module packaging requirement of higher integration is promoted, but the integration degree of the form of each discrete device package in the prior art is not high, and the requirement of high integration degree cannot be met, in order to solve the problem, embodiment 1 of the present invention provides a free-space integrated device, as shown in fig. 1, which comprises a first collimating component 1, a second collimating component 2, a first reflecting component 3 and a wavelength adjusting component 4; the first collimation component 1, the first reflection component 3, the wavelength adjusting component 4 and the second collimation component 2 are sequentially in optical path coupling; the first collimation component 1 is used for collimating incident light; the second collimation component 2 is used for collimating emergent light; the first reflection assembly 3 is used for adjusting the coupling degree of the whole light path by adjusting the self placement angle so as to realize the light attenuation adjustment of emergent light; the wavelength adjusting component 4 is used for adjusting the wavelength of the emergent light.
In actual use, the first collimating assembly 1 and the second collimating assembly 2 may be collimators, or as shown in fig. 2, the first collimating assembly 1 comprises a stationary sleeve 11, an optical fiber 12 arranged in the stationary sleeve 11, a capillary 13 and a lens 14; one end of the optical fiber 12 is arranged at the outer end of the fixed sleeve 11, and the other end is inserted into the capillary 13; the capillary 13 is butt-coupled with the lens 14, thereby forming an optical transmission channel between the optical fiber 12 and the lens 14; the first collimating assembly 1 and the second collimating assembly 2 are mode field matched.
Likewise, the second collimating assembly 2 comprises a stationary sleeve, an optical fiber disposed in the stationary sleeve, a capillary tube, and a lens; one end of the optical fiber is arranged at the outer end of the fixed sleeve, and the other end of the optical fiber is inserted into the capillary tube; the capillary tube is in butt joint coupling with the lens, so that an optical transmission channel between the optical fiber and the lens is formed, and light collimation is achieved.
The first collimating component 1 and the second collimating component 2 may be disposed on the same side, and the first reflecting component 3 and the wavelength adjusting component 4 are further configured to deflect the passing light, so that the outgoing light and the incoming light are emitted from the same side, that is, the outgoing light is emitted from the second collimating component 2. The figures of the present embodiment are presented in such a way that the first collimator assembly 1 and the second collimator assembly 2 may be arranged on the same side.
The first reflecting component 3 may be a mirror. The coupling degree of the whole light path (namely, a part of the light path between the first collimating component 1 and the second collimating component 2) is adjusted, namely, the placement angle of the first reflecting component 3 is adjusted, so that the reflection angle of the incident light passing through the reflecting mirror is adjusted, the whole light path is offset relative to the initial maximum coupling position, so that part of the light can be emitted through the second collimating component 2, and the other part of the light deviates from the coupling light path and cannot be output from the second collimating component 2, thereby realizing light attenuation. The maximum coupling position is obtained by a person skilled in the art from experiments or empirical analysis and is obtained by setting the angle of placement of the components.
According to the embodiment, the collimation component and the reflection component are matched with each other, so that the light attenuation adjustment can be realized through the position adjustment of the reflection component, and a high-integration device in free space is realized.
In order to further improve the integration level of the device, there is an alternative embodiment, as shown in fig. 3, specifically including: the wavelength tuning assembly 4 comprises a first grating assembly 41, a second reflection assembly 42 and a second grating assembly 43; the first grating assembly 41, the second reflection assembly 42 and the second grating assembly 43 are arranged in sequence; the first grating assembly 41 is configured to diffract and split the passing light (i.e., the reflected light obtained by reflecting the incident light by the first reflecting assembly 3) to obtain diffracted light with multiple wavelengths; the second reflection component 42 is configured to adjust the angle at which the diffracted light enters the second grating component 43 by adjusting its placement angle; the second grating element 43 is configured to filter light with a corresponding wavelength according to the angle at which the diffracted light is incident.
In a specific application scenario, the first grating element 41 and the second grating element 43 may be transmissive gratings, the second reflecting element 42 may be a reflecting mirror, the incident light collimated by the first collimating element 1 passes through the first reflecting element 3 to form reflected light, the reflected light is incident to the first grating element 41 from a first angle, and the first angle is determined by a placement angle of the first reflecting element 3; the first grating assembly 41 diffracts the reflected light to separate the light with each wavelength to obtain diffracted light with multiple wavelengths, the diffracted light with multiple wavelengths is reflected by the second reflecting assembly 42 and is injected into the second grating assembly 43 at a second angle, the second angle is determined by the placement angle of the second reflecting assembly 42, the second grating assembly 43 filters the diffracted light with multiple wavelengths according to the placement angle to obtain light with corresponding wavelengths, the placement angle of the second reflecting assembly 42 is adjusted to obtain corresponding wavelengths, and the placement angle of the first reflecting assembly 3 is adjusted to adjust corresponding light attenuation. The placement angle of the first reflecting component 3 and the second reflecting component 42 is adjustable. According to the optical path arrangement device, wavelength adjustment is achieved through the grating component and the reflection component, so that flexibility of optical path arrangement is achieved, and on the other hand, the integration level of the device is further improved.
In actual use, as shown in fig. 4, the device further comprises an isolation assembly 5; the isolation component 5 is disposed between the first collimating component 1 and the first reflecting component 3, and is used for optically isolating light opposite to the incident light. The isolation assembly 5 is shown in fig. 5, and comprises a magnetic ring 51, a first polarization detector 52, a second polarization detector 53 and an optical rotation medium 54, wherein the first polarization detector 52, the second polarization detector 53 and the optical rotation medium 54 are arranged in the magnetic ring 51; the optical rotation medium 54 is disposed between the first polarization detector 52 and the second polarization detector 53; the first polarization detector 52 and the second polarization detector 53 are used for selectively allowing light to pass or preventing light from passing according to the polarization direction of the light; the magnetic ring 51 is used to provide an external magnetic field to the optically active medium 54, so that the light passing through the optically active medium 54 generates a magneto-optical effect, thereby changing the polarization direction of the light, and the incident light can pass through the second polarization detector 53, but the light opposite to the incident light cannot propagate to the first collimating component 1 through the first polarization detector 52, thereby realizing light isolation.
The first polarization detector 52 and the second polarization detector 53 may be crystal wedge angle plates, or the first polarization detector 52 is a polarizer, the second polarization detector 53 is an analyzer, and the optical rotation medium 54 may be a faraday rotation plate.
When the first polarization detector 52 and the second polarization detector 53 are crystal wedge angles, the two birefringent crystal wedge angles clamp the optical rotation medium 54, and the light passing or blocking of the selected light is based on the polarization direction of the light and the propagation direction of the light, so that the light outgoing direction opposite to the incident light is deflected, and cannot reach the first collimating component 1.
When the first polarization detector 52 is a polarizer and the second polarization detector 53 is an analyzer, the selection or blocking of light is based on the polarization direction of the light, and the selection or blocking of light is based on the polarization direction of the light. While selecting pass or stop, different isolation can be set for different wavelength light.
The first polarization detector 52 and the second polarization detector 53 may be devices with the same structure or devices with different structures, and when the same structure device is used, if all the polarizers are adopted, the polarization direction of light allowed to pass through the polarizers is changed by setting the placement direction of the polarizers. The polarizing plate functions on the principle that light having a predetermined polarization direction is allowed to pass therethrough and light other than the predetermined polarization direction is prevented from passing therethrough. The gyromagnetic medium is used for changing the polarization direction of light under the action of an external magnetic field, so that light can only be transmitted unidirectionally from the first polarization detector 52 side to the second polarization detector 53 side.
In practical use, in order to quantify the light attenuation, the light detection assembly 6 is also used to perform light detection on the outgoing light, i.e. as shown in fig. 6, the device further comprises the light detection assembly 6; the light detection component 6 is disposed between the wavelength adjustment component 4 and the second collimation component 2, and is used for performing spectral detection on the emergent light so as to detect the light attenuation. Wherein, the incident light and the emergent light are corresponding descriptions of the light entering the device in different propagation stages, namely, the light transmitted between the first collimating component 1 and the first reflecting component 3 is taken as the incident light, and the light passing through the attenuation adjusting component and the wavelength adjusting component 4 is taken as the emergent light.
The light detection assembly 6 comprises a light splitting assembly 61 and a light detector 62; the beam-splitting assembly 61 may be a beam-splitting prism. The light splitting component 61 is configured to split the outgoing light to obtain a detection light, and the light detector 62 is configured to detect the size of the detection light, so as to obtain the size of the outgoing light according to the size of the detection light, thereby detecting the size of the attenuation amount of the light. The probe light obtained by the beam splitter 61 by splitting the outgoing light is usually a very small part of the outgoing light, and has a negligible effect on the outgoing power of the outgoing light.
In order to improve the detection accuracy, the photodetector 62 includes a condensing lens and a PD (Photo Detector) chip, and the condensing lens is disposed between the beam splitter 61 and the PD chip, and is configured to condense the detection light, so as to facilitate the perception detection of the PD chip. The light power of the outgoing light can be calculated reversely by the light splitting ratio of the light splitting assembly 61, so as to calculate the light attenuation.
Example 2:
the invention is based on the embodiments in the embodiment 1, and combines specific application scenes, and the implementation process in the characteristic scene of the invention is described by the technical expression in the relevant scene.
The embodiment of the invention provides a free-space high-integration device, as shown in fig. 6, which comprises a first collimation component 1, a second collimation component 2, a first reflection component 3, a first grating component 41, a second reflection component 42, a second grating component 43, an isolation component 5, a light splitting component 61 and a light detector 62; the arrangement sequence of each component on the whole light path is as follows: a first collimating component 1, an isolating component 5, a first reflecting component 3, a first grating component 41, a second reflecting component 42, a second grating component 43, a beam splitting component 61 and a second collimating component 2; the first output end of the beam splitter 61 is located on the overall optical path, and the photodetector 62 is disposed at the second output end of the beam splitter 61.
In a specific use scenario, the first collimating component 1, the isolation component 5, the first reflecting component 3, the first grating component 41, the second reflecting component 42, the second grating component 43, the light splitting component 61, and the second collimating component 2 are sequentially: an entrance collimator, an isolator core, a first MEMS (Micro-Electro-Mechanical System, microelectromechanical system technology) mirror, a first transmission grating, a second MEMS mirror, a second transmission grating, a TAP beam splitting prism, and an exit collimator.
The entrance collimator and the exit collimator are a pair of single-core collimators matched with the mode field, the collimators comprise optical fibers 12, capillary tubes 13, lenses 14 and fixed sleeves 11, and the lenses 14, the optical fibers 12, the capillary tubes 13 and the fixed sleeves 11 can be designed at will and only need to meet the mode field matching and working distance.
The isolator core is a set of optical components including a pair of crystal wedge angle pieces, a faraday rotation piece and a magnetic ring 51, and may be a primary component or a bipolar component.
The first MEMS reflector is a large-incidence angle turning mirror MEMS, and when the MEMS reflector rotates, a Variable Optical Attenuation (VOA) function is realized.
The first transmission grating and the second transmission grating are grating pairs with the same optical index and structure.
The second MEMS mirror is a large-incidence angle turning mirror MEMS, and when the MEMS mirror rotates, the first and second transmission gratings together realize a Tunable Optical Filter (TOF) function.
The TAP beam splitting prism is a partial reflection prism and a partial transmission prism, and the beam splitting ratio of the reflected light and the transmitted light can be defined according to the requirements of customers.
The photodetector 62 includes a condenser lens and a PD chip.
The light source is injected through the optical fiber of the entrance collimator, the light enters the isolator core after being collimated by the entrance collimator, the output light of the isolator core enters the first MEMS reflector, and the reflected light enters the transmission grating after passing through the first MEMS reflector; the light output by the transmission grating enters the second MEMS reflector, after passing through the second MEMS reflector, the reflected light enters the transmission grating, the light output by the transmission grating enters the TAP beam splitting prism for splitting, the reflected light enters the light detector 62, and the transmitted light is coupled and received by the output collimator.
The first MEMS reflector rotates under the control of the circuit and rotates for different angles, and the optical power received by the coupling of the collimator is different, so that adjustable optical attenuation is realized; the light passing through the transmission grating and the light is split, and when the second MEMS reflecting mirror rotates for different angles, the light wavelength received by the coupling of the collimator is different, so that the tunable optical filtering is realized.
The first MEMS reflector and the second MEMS reflector are used for making incident light with large angles, and the incident light is different from the small angle light incidence of the independent device.
Example 3:
in order to solve the problem that the highly integrated devices with high degree of freedom composed of components are provided in embodiments 1 and 2, but due to the flexibility caused by the direct use of the integration of the individual components, the devices may be displaced during the assembly process, resulting in the failure of the optical paths of the devices to be coupled normally, the preferred embodiment provides a preferred embodiment, as shown in fig. 7, wherein the devices further comprise a sealing component 7, and the first collimating component 1, the second collimating component 2, the first reflecting component 3 and the wavelength adjusting component 4 are all encapsulated inside the sealing component 7;
the sealing assembly 7 is provided with an input port for incident light to enter the first collimator assembly 1 and an output port for outgoing light to exit. The material of the seal assembly 7 may be metal or ceramic.
It should be noted that, since the first collimating component 1, the second collimating component 2, the first reflecting component 3 and the wavelength adjusting component 4 are all disposed in the sealing component 7, they are not hidden from view by the sealing component 7 in fig. 7, and are not represented by the absence of these components.
In order to further improve the integration level of the assembly, as shown in fig. 8, the sealing assembly 7 includes a main box 71, and a first box 72 and a second box 73 that are disposed on the same surface of the main box 71 and are in communication with the main box 71, the input port is disposed on a side of the first box 72 opposite to the main box 71, the output port is disposed on a side of the second box 73 opposite to the main box 71, in actual use, the first box 72 and the second box 73 may be configured as a cylinder, one end of the cylinder is in communication with the main box 71, and the other end is configured as an output port or an input port.
In combination with each preferred embodiment of embodiment 1, when the device includes the first collimating component 1, the second collimating component 2, the first reflecting component 3, the first grating component 41, the second reflecting component 42, the second grating component 43, the isolating component 5, the light splitting component 61 and the light detector 62, the first reflecting component 3 and the isolating component 5 are disposed in the first box 72, the second reflecting component 42, the light splitting component 61 and the light detector 62 are disposed in the second box 73, the first reflecting component 3, the first grating component 41, the second reflecting component 42 and the second grating component 43 are disposed in the main box 71, and an included angle of approximately 90 ° is formed between the reflecting surfaces of the first reflecting component 3 and the second reflecting component 42, so that the incident light passes through the reflecting action of the first reflecting component 3 and the second reflecting component 42 in the transmission process, the direction of the incident light is modulated, and the incident light is emitted from the same direction out of the sealing component 7 (the incident light is emitted from the light output port and the input port).
Since the first grating element 41 and the second grating element 43 also have a certain deflection effect on light, as shown in fig. 6, the reflecting surface of the second reflecting element 42 faces upward and rightward, and the second reflecting element 42 is disposed at the lower left position of the first grating element 41 and the second grating element 43.
The sealing assembly 7 is further provided with a corresponding fixing structure, so that each assembly is kept fixed, for example, a fixing adhesive is used for fixing each assembly at a corresponding position in the sealing assembly 7, wherein a space for allowing the first reflecting assembly 3 and the second reflecting assembly 42 to rotate to adjust a placement angle can be reserved while the first reflecting assembly 3 and the second reflecting assembly 42 are fixed, for example, a rotating shaft is used for clamping the first reflecting assembly and the second reflecting assembly 42, and the rotating shaft is controlled by a motor, so that the angle adjustment of the first reflecting assembly 3 and the second reflecting assembly 42 is realized by controlling the rotation of the rotating shaft.
The present embodiment improves the transportation safety of the device by packaging the components using the sealing assembly, and ensures the miniaturization, airtight packaging and high reliability of the device.
On the basis of embodiment 1 and embodiment 2, this embodiment also provides an optical module, which uses the free-space integrated device described in embodiment 1 or embodiment 2, for example, the optical module includes a pump laser, an erbium-doped fiber, and the free-space integrated device described in embodiment 1 or embodiment 2, and may also be implemented using a QSFP-DD package.
In the embodiments of the present invention, the first, second, etc. are not meant to be specific sequential meanings, but are merely defined for convenience in describing two or more different objects in the same class and should not be construed to further limit the meaning.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. A free-space integrated device comprising a first collimating component (1), a second collimating component (2), a first reflecting component (3) and a wavelength adjusting component (4);
the first collimation component (1), the first reflection component (3), the wavelength adjusting component (4) and the second collimation component (2) are sequentially coupled in an optical path;
the first collimation component (1) is used for collimating incident light; the second collimation component (2) is used for collimating emergent light;
the first reflection assembly (3) is used for adjusting the coupling degree of the whole light path by adjusting the self placement angle so as to realize the light attenuation adjustment of emergent light;
the wavelength adjustment assembly (4) is used for adjusting the wavelength of the outgoing light.
2. The free-space integrated device of claim 1, wherein the wavelength tuning component (4) comprises a first grating component (41), a second reflection component (42) and a second grating component (43);
the first grating component (41), the second reflection component (42) and the second grating component (43) are sequentially arranged;
the first grating component (41) is used for carrying out wave division on the passing light to obtain multi-wavelength diffracted light;
the second reflection assembly (42) is used for adjusting the angle of incidence of the diffracted light into the second grating assembly (43) by adjusting the placement angle of the second reflection assembly;
the second grating component (43) is used for filtering according to the incidence angle of the diffracted light to obtain light with a corresponding wavelength.
3. The free-space integrated device according to claim 1, characterized in that the device further comprises an isolation component (5);
the isolation component (5) is arranged between the first alignment component (1) and the first reflection component (3) and is used for carrying out optical isolation on light opposite to the incident light.
4. -the free-space integrated device according to claim 3, characterized in that the isolation assembly (5) comprises a magnetic ring (51), a first polarization detector (52), a second polarization detector (53) and an optical rotation medium (54) arranged in the magnetic ring (51);
the optical rotation medium (54) is arranged between the first polarization detector (52) and the second polarization detector (53);
the first polarization detector (52) and the second polarization detector (53) are used for selectively allowing light to pass or preventing light from passing according to the polarization direction of the light;
the magnetic ring (51) is used for providing an external magnetic field for the optical rotation medium (54), so that the light passing through the optical rotation medium (54) generates a magneto-optical effect, thereby changing the polarization direction of light, enabling incident light to pass through the second polarization detector (53), and enabling light opposite to the incident light not to propagate to the first alignment assembly (1) through the first polarization detector (52), thereby realizing light isolation.
5. The free-space integrated device according to claim 1, characterized in that the device further comprises a light detection assembly (6);
the light detection component (6) is arranged between the wavelength adjusting component (4) and the second collimation component (2) and is used for carrying out light splitting detection on emergent light so as to detect the light attenuation.
6. The free-space integrated device of claim 5, wherein the light detection assembly (6) comprises a light splitting assembly (61) and a light detector (62);
the light splitting assembly (61) is used for splitting the emergent light to obtain detection light, and the light detector (62) is used for detecting the size of the detection light so as to obtain the size of the emergent light according to the size of the detection light, thereby detecting the attenuation amount of the light.
7. The free-space integrated device of claim 1, further comprising a sealing assembly (7), wherein the first collimating assembly (1), the second collimating assembly (2), the first reflecting assembly (3) and the wavelength adjusting assembly (4) are all enclosed inside the sealing assembly (7);
the sealing assembly (7) is provided with an input port for incident light to enter the first collimation assembly (1) and an output port for emergent light to exit.
8. The free-space integrated device according to claim 7, characterized in that the material of the sealing component (7) is metal or ceramic.
9. The free-space integrated device according to claim 1, characterized in that the first alignment assembly (1) comprises a fixation sleeve (11), an optical fiber (12) arranged in the fixation sleeve (11), a capillary (13) and a lens (14);
one end of the optical fiber (12) is arranged at the outer end of the fixed sleeve (11), and the other end of the optical fiber is inserted into the capillary tube (13);
the capillary (13) is butt-coupled with the lens (14) so as to form an optical transmission channel between the optical fiber (12) and the lens (14).
10. The free-space integrated device according to claim 1, characterized in that the first collimating component (1) and the second collimating component (2) are mode field matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310386933.8A CN116560016A (en) | 2023-04-07 | 2023-04-07 | Free space integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310386933.8A CN116560016A (en) | 2023-04-07 | 2023-04-07 | Free space integrated device |
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| Publication Number | Publication Date |
|---|---|
| CN116560016A true CN116560016A (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310386933.8A Pending CN116560016A (en) | 2023-04-07 | 2023-04-07 | Free space integrated device |
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| Country | Link |
|---|---|
| CN (1) | CN116560016A (en) |
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2023
- 2023-04-07 CN CN202310386933.8A patent/CN116560016A/en active Pending
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