An optical assembly, optical module and communication device

Abstract

The application provides an optical assembly, an optical module and a communication device, comprising a base, a light splitting structure, a first filter and a collimating lens arranged on the base; a first optical signal of a first path is incident on a light splitting surface of the first filter via an access light port; the light splitting surface of the first filter reflects the first optical signal to the collimating lens along a second path; the collimating lens arranged on the second path is used for converting the first optical signal of the second path into parallel light; the first optical signal contains at least one kind of signal, and the light splitting structure is arranged on an exit path after the first optical signal passes through the collimating lens, so as to output the first optical signal adjusted by the collimating lens according to the wavelength category. The application directly passes the first filter after emitting the first optical signal at the plug-in end, and separates at least two optical signals included in the first optical signal from the main light path, so as to avoid the complex structure of the optical assembly caused by separating the optical signals of the first wavelength and the second wavelength included in the first optical signal in the main light path.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication technology, and in particular to an optical assembly, an optical module and a communication device. BACKGROUND

[0002] The demand for network throughput capacity in modern society is increasing. Optical communication is the mainstream of modern communication solutions, and the optical communication network mainly exists in the form of PON (Passive Optical Network). The communication device is mainly composed of an optical module and a single board and a frame (OLT) on which the optical module is placed. Each optical module corresponds to an optical distribution network (ODN) and serves a certain number of users (each ONU represents a user). As a key component of the optical network, the optical module in the OLT and ONU device is responsible for the optical-electric conversion and transmission of network signals, and is the basis for the normal communication of the entire network.

[0003] The most important component in the optical module is the optical transceiver assembly (BOSA), which realizes the transmission and reception of optical signals. The optical transceiver assembly is generally packaged in a coaxial TO-CAN form to realize the hermetic packaging of the chip. The cap on the TO-CAN is used to complete the spatial optical coupling of the chip to the optical fiber optical path. A GPON assembly is generally composed of a transmitting TO and a receiving TO. According to the standard, transmission and reception use different wavelengths, and a WDM filter is used to realize beam combining and splitting.

[0004] With the upgrading of network bandwidth, GPON networks are facing the upgrading of GPON to 10GPON. In order to consider compatibility, both need to exist in the same ODN network. There are currently two ways for coexistence: one is the external WDM1r scheme, GPON and 10GPON are independent optical modules, and the two are combined by an external WDM1r to access the ODN network to form coexistence. The other is to integrate 10GPON and GPON components in one optical module, combining GPON optical modules and 10GPON optical modules into one optical module, i.e. Combo PON4 optical module. Since the Combo PON4 optical module scheme has the advantages of saving valuable machine room resources, theoretically has lower insertion loss, provides larger power budget, etc., it is more popular with operators, and has become the mainstream of 10GPON, and has become a research hotspot of various manufacturers.

[0005] According to ITU PON standards, GPON uses 1490nm for transmission and 1310nm for reception, while XGPON uses 1577nm for transmission and 1270nm for reception. Therefore, in a combo module, these two receive and transmit wavelengths, totaling four wavelengths, must share a single fiber port. Furthermore, since each receive wavelength band has a specific spectral width—for example, GPON receives at 1290-1330nm and 10GPON receives at 1260-1280nm—the wavelength difference between the GPON and 10GPON receive wavelengths in the module is only 10nm. Furthermore, the standard protocol requires optical isolation of at least 30dB, which theoretically requires the use of collimated light at a small angle. Currently, common combo PON optical modules utilize a collimated optical path. A collimating lens is placed at the front end of the fiber core. The first filter performs a small-angle splitting operation, separating the 1270nm wavelength. A second 45° filter in the main optical path further separates the remaining 1310nm wavelength. A collimating lens is also required in the transmit optical path to couple with the fiber core. However, existing GPON and 10GPON compatible networks have disadvantages such as a large number of optical path components and devices, a complex coupling process, and a large size of the entire component. Summary of the Invention

[0006] In response to the above technical problems, the present application provides an optical component, an optical module and a communication device, which can separate and transmit multiple uplink signals and multiple downlink signals using a simpler structure.

[0007] This application is implemented by the following methods:

[0008] In a first aspect, a specific embodiment of the present application provides an optical assembly, comprising a base and a light splitting structure, a first filter, and a collimating lens disposed on the base;

[0009] The base is provided with a light inlet and outlet, a splitting surface of the first filter is arranged toward the light inlet and outlet, and the first light signal of the first path is incident on the splitting surface of the first filter via the light inlet and outlet;

[0010] The beam splitting surface of the first filter reflects the first light signal along a second path to the collimating lens, the first path and the second path do not overlap, the collimating lens is arranged on the second path, and the collimating lens is used to convert the first light signal of the second path into parallel light;

[0011] The first optical signal contains at least one type of optical signal wavelength. The optical splitting structure is arranged on the output path of the first optical signal after passing through the collimating lens, and is used to output the first optical signal adjusted by the collimating lens according to the wavelength type.

[0012] The first light signal (downlink signal, including the first wavelength light signal and the second wavelength light signal) is separated from the main light path at the same time by setting the first filter after the first light signal is emitted from the plug-in end, so that the complex structure of the optical assembly caused by separating the first wavelength light signal and the second wavelength light signal included in the first light signal in the main light path is avoided.

[0013] In a possible design, the first light signal includes a first wavelength light signal and a second wavelength light signal, the first wavelength light signal and the second wavelength light signal have different wavelengths, and the light splitting structure includes a fifth filter and a sixth filter.

[0014] The fifth filter is arranged on an exit path of the first wavelength light signal and the second wavelength light signal passing through the collimating lens, the fifth filter transmits the first wavelength light signal and reflects the second wavelength light signal along a third path, and the third path is not coincident with the second path.

[0015] The sixth filter is arranged on the third path, the sixth filter reflects the second wavelength light signal along a fourth path, and the fourth path is not coincident with the third path.

[0016] The base is further provided with a first light outlet and a second light outlet, the first light outlet is arranged on a transmission path of the first wavelength light signal transmitted by the fifth filter, and the first light outlet is used for passing the first wavelength light signal, and the second light outlet is arranged on the fourth path, and the second light outlet is used for passing the second wavelength light signal.

[0017] The application separates and outputs at least two signals separated from the main pipeline through a light splitting structure.

[0018] In a possible design, the optical assembly further includes a first light receiver and a second light receiver, the first light receiver is arranged on an exit path of the first light outlet to receive the first wavelength light signal, and the second light receiver is arranged on an exit path of the second light outlet to receive the second wavelength light signal.

[0019] The application receives the light signals output by different light outlets through different light receivers.

[0020] In a possible design, the second path is parallel to the fourth path.

[0021] In the present application, the second path of the output first wavelength optical signal and the fourth path of the second wavelength optical signal are parallel, so that the first optical receiver receiving the first wavelength optical signal and the second optical receiver receiving the second wavelength optical signal can be arranged parallel to each other, thereby achieving the purpose of more simple structure.

[0022] In a possible design, the light splitting structure further comprises a seventh filter, which is arranged on the fourth path between the sixth filter and the second light outlet, and the seventh filter transmits the second wavelength optical signal.

[0023] By arranging the seventh filter on the fourth path between the sixth filter and the second light outlet, and filtering the second wavelength optical signal through the seventh filter, the second receiver can avoid receiving signals other than the second wavelength optical signal.

[0024] In a possible design, the optical assembly further comprises a third filter arranged on the base, and the base is provided with at least one light inlet; the optical signal passes through each light inlet and irradiates the third filter, the third filter reflects or transmits the optical signal passing through each light inlet and irradiates the light inlet and outlet; the wavelengths of the optical signals passing through each light inlet are different.

[0025] In the present application, the device emitting the uplink signal is arranged on the light inlet, so that the uplink signal and the downlink signal of the entire device can be transmitted at the same time.

[0026] In a possible design, the number of light inlets arranged on the base is two, which are a first light inlet and a second light inlet, the first light inlet is arranged opposite to the light inlet and outlet, and the third optical signal of the fifth path passes through the first light inlet and irradiates the light inlet and outlet.

[0027] The light splitting surface of the third filter is arranged towards the second light inlet, the fourth optical signal of the sixth path irradiates the light splitting surface of the third filter through the second light inlet, and the third filter reflects the fourth optical signal along the seventh path and irradiates the light inlet and outlet.

[0028] By arranging two light inlets of the uplink signal, the light inlet of the optical assembly meets the transmission of the uplink signal of GPON and compatible 10GPON.

[0029] In a possible design, the base comprises a connecting tube and a support arranged on the connecting tube, the support comprises a first support, the first support is used for fixing the first filter and the collimating lens, and the light inlet / outlet port is arranged on the first support; the connecting tube is used for fixing the third filter, and the first light outlet port, the second light outlet port and the at least one light inlet port are arranged on the connecting tube.

[0030] By arranging the first support and arranging the optical device for separating the downlink signal from the main light path on the first support, the arrangement of the optical device in the optical assembly is more convenient.

[0031] In a possible design, the collimating lens is integrally injection molded with the first support.

[0032] By integrally injection molding the first support, the first support is installed as a whole, and the structure is more simple.

[0033] In a possible design, the support further comprises a second support, and the second support is used for fixing the light splitting structure.

[0034] By arranging the second support and arranging the light splitting structure on the second support, the first support is prevented from being too complex, and the arrangement of the optical device on the support is prevented from being troublesome.

[0035] In a possible design, the optical assembly further comprises a first converging lens arranged on the second path and a second converging lens arranged on the fourth path, and the second support is used for fixing the first converging lens and the second converging lens.

[0036] By arranging the converging lens on the second support, the first light receiver and the second light receiver are prevented from being provided with the converging lens, and the structure of the first light receiver and the second light receiver is more simple.

[0037] In a possible design, the first converging lens is integrally injection molded with the second support, and the second converging lens is integrally injection molded with the second support.

[0038] By integrally injection molding the converging lens and the second support, the position of the converging lens on the support is more accurate, and the trouble of disassembly is avoided.

[0039] In a possible design, the first support is integrally injection molded with the second support.

[0040] By integrally injection molding the first support and the second support, the structure of the support in the whole optical assembly is more simple.

[0041] In a possible design of the present application, the optical assembly further includes a ferrule and a plug, the plug is internally provided with a ferrule hole, the ferrule is fixed in the ferrule hole, and one end of the ferrule protrudes from the plug, and the end of the ferrule protruding from the plug is arranged in the light inlet / outlet port to position the ferrule by the light inlet / outlet port.

[0042] The ferrule of the plug-in end is positioned by being arranged in the light inlet / outlet port, and is fixed by the plug and the support, so that the connection position of the plug-in end and the support is more accurate, and the connection is more stable.

[0043] In a possible design of the present application, the optical assembly further includes a combiner and emitter device arranged on the base, and the combiner and emitter device is arranged opposite to the light inlet / outlet port; the combiner and emitter device emits third and fourth optical signals of a fifth path, and the third and fourth optical signals of the fifth path are emitted to the light inlet / outlet port.

[0044] The present application emits a plurality of uplink signals by the combiner and emitter device, so that the structure for emitting uplink signals arranged on the base is more simple.

[0045] In the second aspect, the embodiments of the present application provide an optical module, which includes the optical assembly of any one of the first aspect.

[0046] In the third aspect, the embodiments of the present application provide a communication device, which includes the optical module of the second aspect. The communication device can be an OLT, or an ONU, or other electronic devices. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 The present application provides a passive optical network access network compatible with GPON and 10GPON;

[0048] Figure 2 The present application provides a structure diagram of a four-way optical assembly;

[0049] Figure 3 The present application provides a splitting structure;

[0050] Figure 4 The present application provides another structure diagram of a four-way optical assembly;

[0051] Figure 5 The present application provides a third optical emitter;

[0052] Figure 6 The present application provides a structure diagram of an optical assembly;

[0053] Figure 7A schematic view of a support provided for the embodiments of the present application is shown in the following.

[0054] Figure 8 A second support provided for the embodiments of the present application is shown in the following.

[0055] Figure 9 A schematic view of a support provided for the embodiments of the present application is shown in the following. DETAILED DESCRIPTION

[0056] The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0057] The optical assembly provided by the embodiments of the present application separates multiple uplink signals and / or multiple downlink signals from a main optical path. Thus, the multiple uplink signals and the multiple downlink signals are prevented from being transmitted on the main optical path at the same time, thereby avoiding the situation that the main optical path has more devices and is more costly. Meanwhile, the optical assembly of the present application further includes a base, and multiple optical devices included in the optical assembly are arranged on the base, thereby making the arrangement of the optical assembly more convenient.

[0058] The number of the multiple uplink signals and the multiple downlink signals can be determined according to specific scenarios, which is not limited in the present application. Of course, the number of the multiple uplink signals and the multiple downlink signals can be the same or different. In the following, the passive optical network access network compatible with GPON and 10GPON is taken as an example for description. Of course, the optical assembly of the multiple uplink signals and the multiple downlink signals can also be applied to other scenarios, which is not limited in the present application.

[0059] Figure 1 A passive optical network access network compatible with GPON and 10GPON provided by the embodiments of the present application is shown in the following. Figure 1 As shown in the figure, the passive optical network access network compatible with GPON and 10GPON includes an optical line terminal (OLT) and multiple optical distribution network (ODN) devices. The optical line terminal is connected with the multiple optical distribution network devices, and converts the received electrical signals into optical signals and transmits the optical signals to the optical distribution network devices. Meanwhile, the OLT can also be used to realize the functions of control, management, ranging, etc. of the ONU. The ODN device is used to connect with the ONU at the user end and transmit data signals (optical signals) to the optical network unit (ONU) device at the user end.

[0060] In the embodiments of the present application, the passive optical network access network is a passive optical network access network compatible with GPON and 10GPON. Therefore, the signals sent by the OLT to the ODN include both optical signals of GPON and optical signals of 10GPON. The ODN device provides different ONUs with data services satisfying GPON or 10GPON according to different ONU types (the network bandwidth purchased by the users corresponding to the ONUs).

[0061] The ONU device converts the downlink signals sent by the ODN from optical signals to electrical signals to provide network services for the users. And converts the uplink signals and the downlink signals sent by the users to the ONU device from electrical signals to optical signals and sends them to the OLT through the ODN.

[0062] According to the standards of the International Telecommunication Union (ITU) in the field of passive optical networks (PON), GPON uses 1490 (1480-1500) nm wavelength optical signals to send uplink signals and uses 1310 nm wavelength optical signals to send downlink signals, and XGPON uses 1577 (1575-1580) nm wavelength optical signals to send uplink and downlink signals and uses 1270 nm wavelength optical signals to send uplink and downlink signals. That is, the wavelength interval difference between the GPON receiving and the 10GPON receiving in the assembly is only 10 nm. Therefore, in the 4-way optical assembly, the two sets of received and sent optical signals, a total of four optical signals, need to share one optical fiber port for transmission.

[0063] The OLT in the embodiments of the present application also includes a four-way optical module. Through the four-way optical module, the OLT receives the 1490 nm uplink signals of GPON and the 1577 nm uplink signals of XGPON. And, through the four-way optical module, the OLT transmits the 1270 nm downlink signals of GPON and the 1310 nm downlink signals of XGPON to the ONUs.

[0064] The structure of the optical device of the four-way optical signal for transmitting the two uplink optical signals and the two downlink optical signals will be described below.

[0065] Figure 2 A structure diagram of a four-way optical assembly provided in the embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, it includes a base and a light splitting structure, a first filter, a collimating lens, a second filter and a third filter arranged on the base. Figure 2

[0066] ​The base is also provided with an in-out light port, a first in-light port, a second in-light port, a first out-light port and a second out-light port. The in-out light port is also provided with a plug-in end, which emits a first wavelength light signal and / or a second wavelength light signal (first light signal) and receives a third light signal and a fourth light signal. The first in-light port and the second in-light port are also respectively provided with a first light emitter and a second light emitter, the first light emitter emits the third light signal, and the second light emitter emits the fourth light signal. The first out-light port and the second out-light port are also respectively provided with a first light receiver and a second light receiver, the first light receiver receives the first wavelength light signal emitted by the in-out light port, and the second light receiver receives the second wavelength light signal emitted by the in-out light port.

[0067] In one example, the plug-in end includes a first light signal for sending, the first light signal including a first wavelength light signal and a second wavelength light signal. The first wavelength light signal is a downstream signal meeting the requirements of GPON, and the first wavelength light signal is a light signal in the frequency band of 1260nm-1280nm. The second wavelength light signal is a downstream signal meeting the requirements of 10GPON, and the second wavelength light signal is a light signal in the frequency band of 1300nm-1320nm. Of course, the first wavelength light signal can also be referred to as a 1270nm light signal, and the second wavelength light signal can also be referred to as a 1310nm light signal. The third light signal emitted by the first light emitter is an upstream signal meeting the requirements of GPON, and the third light signal is a light signal in the frequency band of 1480nm-1500nm. The fourth light signal emitted by the second light emitter is an upstream signal meeting the requirements of 10GPON, and the fourth light signal is a light signal in the frequency band of 1575nm-1580nm. Of course, the first wavelength light signal can also be a 1310nm light signal, the second wavelength light signal can also be a 1270nm light signal, the third light signal can also be a 1490nm light signal, and the fourth light signal can also be a 1577nm light signal.

[0068] The first light signal emitted by the plug-in end is a first path first light signal, and the first path first light signal is emitted through the in-out light port. The first light signal includes a first wavelength light signal and a second wavelength light signal, and the first wavelength light signal and the second wavelength light signal are divergent light signals.

[0069] One of the light splitting surfaces of the first filter is arranged towards the in-out light port, and the first light signal passing through the in-out light port can irradiate the light splitting surface of the first filter. The first filter reflects the first light signal (the first wavelength light signal and the second wavelength light signal). That is, the first filter reflects the light signal in the frequency band (wavelength) of 1260nm-1320nm.

[0070] The first filter reflects the first light signal to a second path, and the second path is not coincident with the first path. Specifically, the first light signal is reflected by the first filter to ensure that the first light signal does not pass through the light inlet and outlet in the first path in the reverse direction.

[0071] The second path of the first light signal reflected by the first filter further comprises a collimating lens. The first light signal of the second path reflected by the first filter irradiates the collimating lens. The collimating lens is a lens that converts non-parallel light signals into parallel light signals. The first light signal irradiated on the collimating lens passes through the collimating lens, and the light signal included in the first light signal after passing through the collimating lens is a parallel light signal.

[0072] The emission direction of the first light signal after passing through the collimating lens is further provided with a light splitting structure. The light splitting structure is used to output the first wavelength light signal and the second wavelength light signal included in the parallel first light signal through different light outlets respectively. The light splitting structure can adopt various forms, which are not limited in the present application.

[0073] Optionally, a second filter can be further arranged between the collimating lens and the light splitting structure. The second filter can transmit light signals in the frequency band of 1260nm-1320nm. The second filter is used to filter light signals in other frequency bands except the light signals in the frequency band of 1260nm-1320nm passing through the collimating lens, so as to avoid that the light signals entering the light splitting structure through the second filter include light signals in other frequency bands except the light signals in the frequency band of 1260nm-1320nm.

[0074] The first light inlet is arranged on the side of the base away from the light inlet and outlet. The first filter comprises the light inlet and outlet and the first light inlet on the two sides thereof. The first light inlet is further provided with a first light emitter. The first light emitter arranged on the first light inlet emits a third light signal. The path of the third light signal is the first A path. The third light signal is a converging light signal. The third light signal of the first A path passes through the first filter to emit to the light inlet and outlet, so that the plug-in end can receive the third light signal. In a specific example, the phase difference between the first path and the first A path is 180°.

[0075] The second light inlet is arranged between the first filter and the first light inlet. The second light inlet is further provided with a second light emitter. The second light emitter arranged on the second light inlet emits a fourth light signal. The fourth light signal is a light signal of the first B path. The fourth light signal of the first B path passes through the third light signal of the first A path. The fourth light signal is a converging light signal.

[0076] The third filter is arranged at the position where the first B path and the first A path intersect. In an example, if the third light signal is a horizontal light signal, the fourth light signal passes through the third light signal vertically.

[0077] The third filter reflects the fourth optical signal and transmits the third optical signal. One light splitting surface of the third filter is arranged towards the second light inlet. The fourth optical signal of the path B is incident to the light splitting surface of the third filter, and the third filter reflects the fourth optical signal along a path C. The fourth optical signal of the path C reflected by the third filter is emitted towards the light inlet and outlet, so that the fourth optical signal can be received by the plug end.

[0078] Optionally, a fourth filter is arranged on the base of the path A between the first light inlet and the second filter, and the fourth filter transmits the third optical signal.

[0079] In the embodiments of the present application, each filter is only one specific embodiment of the present application, and the optical assembly of the present application can also increase other filters on the basis of the embodiments of the present application according to the functional needs.

[0080] It should be noted that the cross-sectional shape of each filter of the present application is rectangular, which is only a specific example of the present application and cannot be used to limit the present application. The cross-sectional shape of the filter in the present application can also be set to trapezoidal or any other arbitrary shape. As long as it can be used to reflect optical signals of specific wavelengths, the present application does not limit it. In one example, when the cross-sectional shape of the filter is trapezoidal, the inclined edge of the trapezoid is a reflecting surface of the filter.

[0081] The present application directly separates the first optical signal (downlink signal, including the first wavelength optical signal and the second wavelength optical signal) from the main light path through the first filter after emitting the first optical signal from the plug end. Thus, the problem of complex optical assembly structure and excessive use of collimating lenses caused by separating the first wavelength optical signal and the second wavelength optical signal included in the first optical signal in the main light path is avoided, achieving the purpose of reducing the structure of the optical assembly and reducing the cost of the optical assembly.

[0082] Figure 3 A light splitting structure is provided for the specific embodiments of the present application. As shown in Figure 3 The light splitting structure is used to separate the first optical signal transmitted by the collimating lens, which includes the first wavelength optical signal and the second wavelength optical signal, into the first wavelength optical signal and the second wavelength optical signal and output through different light outlets. As shown in Figure 3 The light splitting structure includes a fifth filter, a sixth filter and a seventh filter.

[0083] The optical signal transmitted through the collimating lens includes the first wavelength optical signal and the second wavelength optical signal, and the first wavelength optical signal and the second wavelength optical signal are parallel optical signals, respectively.

[0084] The direction of the first light signal passing through the collimating lens is also provided with a fifth filter. The fifth filter is used to reflect the light signal of the first wavelength and transmit the light signal of the second wavelength, or the fifth filter is used to reflect the light signal of the second wavelength and transmit the light signal of the first wavelength. That is, the fifth filter can be used to filter the light signal of the first wavelength or the light signal of the second wavelength, which is not limited in the application.

[0085] Next, the fifth filter reflects the light signal of the second wavelength and transmits the light signal of the first wavelength as an example for specific description. One light splitting surface of the fifth filter is not perpendicular to the light splitting surface passing through the fifth filter, so as to avoid the fifth filter reflecting the light signal of the second wavelength to the opposite direction of the second path.

[0086] The base corresponding to the light splitting structure is also provided with a first light outlet and a second light outlet.

[0087] The first light outlet is arranged on the base in the emission direction of the light signal of the first wavelength passing through the fifth filter. The first light outlet is provided with a first light receiver, which receives the light signal of the first wavelength and transmits the light signal of the first wavelength to the user end.

[0088] Optionally, the first light outlet and the fifth filter further comprise a converging lens, which is used to convert the parallel light of the light signal of the first wavelength passing through the fifth filter into converging light.

[0089] The fifth filter reflects the light signal of the second wavelength along the third path. The direction of the fifth filter reflecting the light signal of the second wavelength along the third path is also provided with a sixth filter, and the sixth filter reflects the light signal of the second wavelength. The sixth filter reflects the light signal of the second wavelength along the fourth path, and the fourth path is not coincident with the third path.

[0090] In one example, the fifth filter and the sixth filter are arranged in parallel with each other. When the fifth filter and the sixth filter are parallel, the direction of reflecting the light signal of the second wavelength is the same as and parallel to the direction of the first light signal passing through the collimating lens.

[0091] The second light outlet is arranged on the fourth path reflected by the sixth filter. The second light outlet comprises a second light receiver arranged therein, which is used to receive the light signal of the second wavelength and transmit the light signal of the second wavelength to the corresponding user end.

[0092] Optionally, the second light outlet and the sixth filter further comprise a converging lens and a seventh filter, and the second wavelength light signal transmits through the converging lens and the seventh filter. The seventh filter and the converging lens are arranged in an overlapping manner. The seventh filter is used to filter other light signals except the second wavelength light signal, so as to reduce the other mixed signals received by the second light receiver. The converging lens is used to convert the parallel light of the second wavelength light signal reflected by the sixth filter into converging light, so as to facilitate the signal receiving of the second light receiver.

[0093] In the embodiments of the present application, the first light emitter and the second light emitter can be an independent structure. The following will be specifically described through embodiments.

[0094] It should be noted that the light splitting structure comprising the converging lens is only an example in the embodiments of the present application. In the embodiments of the present application, the light splitting structure can also not comprise the converging lens. When the light splitting structure does not comprise the converging lens, the first light receiver and the second light receiver arranged in the first light outlet and the second light outlet respectively comprise the converging lens, so as to convert the parallel light of the first wavelength light signal passing through the fifth filter into converging light, and convert the parallel light of the second wavelength light signal reflected by the sixth filter into converging light.

[0095] Figure 4 Another four-way light assembly structure schematic diagram is provided for the embodiments of the present application. As shown in Figure 4 , the four-way light assembly structure schematic diagram is improved based on the structure of the four-way light assembly shown in Figure 2 . The four-way light assembly structure schematic diagram comprises a base, a light splitting structure arranged on the base, a first filter, a second filter, a fourth filter and a collimating lens. In the example shown in Figure 4 , the base further comprises a light inlet, a first light outlet and a second light outlet. The light inlet, the first light outlet and the second light outlet arranged on the base, and the first filter, the collimating lens, the second filter, the light splitting structure and the fourth filter arranged on the base are the same as the structures, positions and functions corresponding to those in Figure 2 and Figure 3 , and the present application will not be described in detail.

[0096] The light inlet arranged on the base is arranged at the same position as the second light inlet shown in Figure 2 . The light inlet shown in Figure 4 further comprises a third light emitter, and the third light emitter is used to emit a third light signal and a fourth light signal. The third light signal and the fourth light signal can be the same as those shown in Figure 2 , and the present application will not be described in detail.

[0097] Figure 5 A third light emitter is provided for the embodiments of the present application. As shown in Figure 5As shown, the 4-way optical module includes a 1557 laser signal transmitter, a 1490 laser signal transmitter, and a wavelength division multiplexing filter (WDM filter). The wavelength division multiplexing filter (wavelength division multiplexing chip (WDM) and the laser signal transmitter. The 1557 laser signal transmitter is configured to transmit a 1577nm laser signal, and the 1577 laser signal transmitter is electrically connected to the wavelength division multiplexing chip. The 1490 laser signal transmitter is configured to transmit a 1490nm laser signal, and the 1490 laser signal transmitter is electrically connected to the wavelength division multiplexing chip. The wavelength division multiplexing chip is configured to modulate a third optical signal and a fourth optical signal according to the signals output by the 1557 laser signal transmitter and the 1490 laser signal transmitter. The laser signal transmitter is connected to the wavelength division multiplexing chip and transmits corresponding laser signals. The third optical signal and the fourth optical signal output by the laser signal transmitter are output through the light inlet.

[0098] Optionally, the signal output interface of the 1577 laser signal transmitter and the signal output interface of the 1490 laser signal transmitter are further connected to a backlight detection device. The backlight detection device is configured to determine the light intensity of each signal according to the acquired signals output by the 1577 laser signal transmitter and the 1490 laser signal transmitter. When the backlight detection device determines that the light intensity of the light signal output by each laser signal transmitter is less than a predetermined threshold, the backlight detection device further sends information to the corresponding laser signal transmitter, and the information is used to instruct the laser signal transmitter to enhance the light intensity of the output light signal.

[0099] In the above embodiments of the present application, the third optical signal and / or the fourth optical signal are transmitted by a third optical transmitter. Since the optical module uses fewer devices to achieve the same effect, the structure of the 4-way optical module is more simple.

[0100] In a specific example, the backlight detection device includes a storage device for the light intensity threshold corresponding to the 1490 laser signal transmitter and the light intensity threshold corresponding to the 1577 laser signal transmitter. The backlight detection device obtains the intensity of the light signal emitted by the 1577 laser signal transmitter based on the signal output interface of the 1577 laser signal transmitter. The backlight detection device compares the intensity of the light signal emitted by the 1577 laser signal transmitter with the stored light intensity threshold corresponding to the 1577 laser signal transmitter. If the intensity of the light signal emitted by the 1577 laser signal transmitter is within the range of the light intensity threshold, the backlight detection device does not perform any processing; if the intensity of the light signal emitted by the 1577 laser signal transmitter is greater than or less than the range of the light intensity threshold, the backlight detection device transmits an indication information to the 1577 laser signal transmitter. The 1577 laser signal transmitter adjusts the light intensity of the emitted light signal according to the indication information.

[0101] Optionally, the third optical transmitter further includes a converging lens (tube cap), which is disposed on the path of the third optical signal and the fourth optical signal combined and transmitted by the laser transmitter. The converging lens can be disposed on either the packaging structure of the third optical transmitter or on the base, and this application does not limit this.

[0102] The base is described in detail below through specific embodiments.

[0103] Figure 6 This is a schematic diagram of an optical component structure provided in a specific embodiment of the present application. Figure 6 As shown, it includes a base, an optical device and a plug-in end 603 arranged on the base. The optical device includes Figures 2 to 5 The first filter, the second filter, the third filter, the fourth filter, the light splitting structure and the collimating lens, etc.

[0104] The base includes a bracket 601 and a connecting tube body 602 , and the bracket 601 is disposed in the connecting tube body 602 .

[0105] In a specific embodiment of the present application, the collimating lens, the first filter and the plug-in end 603 are arranged on the bracket 601 , and the light splitting structure and the third filter are arranged on the connecting tube body 602 .

[0106] The following describes in detail the structures of the bracket 601 and the collimating lens, the first filter, and the plug-in end 603 provided on the bracket 601 .

[0107] Figure 7 This is a schematic diagram of the structure of the bracket provided in the specific embodiment of this application. Figure 7 As shown, it includes a bracket 601 and a collimating lens 701, a first filter 702 and a plug-in end 603 arranged on the bracket 601.

[0108] The one side of the support 601 comprises a first connecting hole 703, which is used to set the plug-in end 603. The shape and size of the first connecting hole 703 match the plug-in end 603. The plug-in end 603 is used to input / output optical signals. In the embodiment of the present application, the plug-in end 603 can emit the first optical signal of the first path, which comprises the optical signal of the first wavelength and the optical signal of the second wavelength. The optical signal of the first wavelength and the optical signal of the second wavelength can be the same as shown in the following formula (1) and (2). Figure 1 and Figure 2

[0109] The other side of the support 601 opposite to the first connecting hole 703 also comprises a first filter mounting position 704, in which the first filter 702 can be set.

[0110] The support 601 further comprises a first light transmission hole 705 penetrating the support 601. One side of the first light transmission hole 705 penetrates the first connecting hole 703, and the other side of the first light transmission hole 705 penetrates the first filter mounting position 704. Optionally, the first light transmission hole 705 also coincides with the first path, so as to avoid the interference of the first signal to the inner wall of the first light transmission hole 705 when the first signal is irradiated to the inner wall.

[0111] The optical signal of the first wavelength and the optical signal of the second wavelength output by the plug-in end 603 are irradiated to the first filter 702 set on the first filter mounting position 704 through the first light transmission hole 705.

[0112] In one example, if the cross sections of the first light transmission hole 705 and the first filter mounting position 704 are cylindrical, the angle between the axis of the first light transmission hole 705 and the end face of the first filter mounting position 704 is not equal to 90 degrees. That is, the first filter mounting position 704 is set obliquely relative to the axis of the first light transmission hole 705. The first filter 702 set in the first filter mounting position 704 reflects the first optical signal along the second path. The first path does not coincide with the second path. The second path of the support 601, in which the first filter 702 reflects the first signal, further comprises a second light transmission hole 706, which penetrates the first light transmission hole 705.

[0113] The second light transmission hole 706 comprises a collimating lens 701 set therein. The first optical signal reflected by the first filter 702 along the second path passes through the collimating lens 701. The collimating lens 701 is used to convert the divergent first signal reflected by the first filter 702 into the parallel first optical signal output. That is, the first optical signal input into the collimating lens 701 is the divergent optical signal, and the first optical signal output by the collimating lens 701 is the parallel optical signal.

[0114] ​Optionally, the bracket 601 can be processed by injection molding process. The first filter 702 can be directly placed on the first filter mounting position 704 of the injection molded bracket 601. The first filter 702 can also be placed in the corresponding position of the injection molding model during the injection molding process of the bracket 601, so that the injection molded bracket 601 and the first filter 702 form an integral whole. The collimating lens 701 can be placed in the corresponding position of the injection molding model during the injection molding process of the bracket 601, so that the injection molded bracket 601 and the collimating lens 701 form an integral whole.

[0115] The first light signal passing through the collimating lens 701 is output through the light outlet provided on the connecting pipe body 602, and the first wavelength light signal and the second wavelength light signal are output through the first light outlet and the second light outlet, respectively.

[0116] The connecting pipe body 602 is a middle-through shell structure, including a shell 604 and a through hole 605.

[0117] The bracket 601 is arranged on one side of the through hole 605. The first connecting hole 703 of the bracket 601 is close to the end face of the connecting pipe body 602, and the first filter mounting position 604 of the bracket 601 is away from the end face of the connecting pipe body 602. The first light signal passing through the collimating lens 701 is received by the first light receiver and the second light receiver arranged on the shell 604 of the connecting pipe body 602, and the first wavelength light signal and the second wavelength light signal passing through the collimating lens are received by the first light receiver and the second light receiver.

[0118] The light splitting structure and the plurality of light receivers. The light splitting structure is used to output the first wavelength light signal and the second wavelength light signal included in the first light signal through different light outlets. The plurality of light receivers are arranged in different light outlets, and each light outlet is provided with a light receiver. The receiving end structure can be as shown in Figure 3 , and the present application will not be described here.

[0119] The other side of the through hole 605 without the bracket 601 is provided with a first light emitter, and the first light emitter emits a third light signal along a first A path to the bracket 601. The third light signal of the first A path passes through the first light passing hole 705 and the light inlet and outlet 703 of the bracket 601, so that the plug-in end 603 receives the third light signal.

[0120] Optionally, the through hole 605 between the bracket 601 and the first light emitter further includes a fourth filter. The fourth filter is used to transmit the third light signal.

[0121] The shell 604 between the support 601 and the first light emitter further comprises a second light emitter arranged therein, and the second light emitter emits a fourth light signal along a B path to the support 601, and the B path passes through the through hole 605. The B path intersects with the through hole 605, and the through hole 605 further comprises a third filter arranged therein. The fourth light signal emitted by the second light emitter irradiates to a light splitting surface of the third filter, and the third filter reflects the fourth light signal along a C path. The fourth light signal of the C path passes through the first light transmission hole 705 of the support 601 and the light inlet and outlet 703, so that the plug end 603 receives the fourth light signal.

[0122] The plug end 603 comprises a plug pin 606, and the plug pin 606 comprises a plug hole 607. The plug hole 607 on the side of the plug end 603 connected with the support 601 further comprises a plug core 608 arranged therein, and the plug core 608 is used for receiving or transmitting a corresponding signal. The plug hole 607 on the side of the plug end 603 away from the support 601 further comprises an optical fiber arranged therein, and the optical fiber is used for transmitting the received or transmitted signal.

[0123] Optionally, the plug core 608 is arranged in the first connecting hole 703, and the first connecting hole 703 is used for positioning the plug end 603 and the plug core 608. When the plug core 608 is arranged in the first connecting hole 703, the plug pin 606 is in contact with and connected to the end surface of the support 601 where the first connecting hole 703 is located.

[0124] In the specific embodiments of the present application, the support 601 can further comprise a light splitting structure Figure 4 The light outlet shown in the figure is used for replacing the first light outlet and the second light outlet on the connecting pipe body. The light outlet is arranged on the connecting pipe body in the same way as the second light outlet, and details are not repeated herein.

[0125] In the specific embodiments of the present application, the support 601 described above does not comprise a light splitting structure, which is only an example of the present application. The support 601 can further comprise a light splitting structure, and when the support 601 comprises the light splitting structure, the light outlet does not comprise the light splitting structure.

[0126] In the specific embodiments of the present application, the support can comprise a first support and a second support. The first support can be the support 601 shown in the figures of Figure 6 and Figure 7 The second support can be used for arranging a light splitting structure. In the following, the second support provided in the specific embodiments of the present application is described in detail.

[0127] Figure 8 The second support provided in the specific embodiments of the present application. As shown in the figure Figure 8As shown, the second support 801 in the direction of the first light signal (including the first wavelength light signal and the second wavelength light signal) passing through the collimating lens further comprises a fifth filter mounting position 802, and a fifth filter is arranged in the fifth filter mounting position 802. The first light signal passing through the collimating lens irradiates the fifth filter arranged in the fifth filter mounting position 802. The fifth filter transmits the first wavelength light signal and reflects the second wavelength light signal along a third path.

[0128] When the cross section of the fifth filter is rectangular, the fifth filter arranged in the fifth filter mounting position 802 has an angle with the first light signal. In an example, the end surface of the fifth filter mounting position 802 has an angle with the first light signal passing through the fifth filter, which is not equal to 90 degrees. That is, the first light signal does not irradiate the fifth filter perpendicularly. The angle between the end surface of the fifth filter mounting position 802 and the first light signal passing through the fifth filter is set according to the specific positions of various structures in the second support 801, which is not limited in the present application.

[0129] The second support 801 in the direction of the first wavelength light signal passing through the fifth filter further comprises a first converging lens mounting position 806, and the first converging lens mounting position 806 comprises a first converging lens. The first converging lens arranged in the first converging lens mounting position 806 converts the first wavelength light signal irradiating the first converging lens from parallel light into converging light. The first light receiver is further arranged on the first light outlet of the connecting pipe body 602 corresponding to the first converging lens mounting position 806, and the first light receiver is used to receive the first wavelength light signal.

[0130] The second support 801 in the direction of the second wavelength light signal reflected by the fifth filter further comprises a sixth filter mounting position 803, and the sixth filter mounting position 803 comprises a sixth filter. The sixth filter arranged in the sixth filter mounting position 803 reflects the second wavelength light signal along a fourth path, and the fourth path does not coincide with the third path. The specific position of the fourth path is set according to actual needs, which is not limited in the present application.

[0131] Optionally, the second support 801 in the direction of the second wavelength light signal reflected by the sixth filter further comprises a seventh filter mounting position 804, and the seventh filter mounting position 804 comprises a seventh filter. The seventh filter is a filter for filtering light signals of other wavelengths except the second wavelength light signal. One reflecting surface of the seventh filter arranged in the seventh filter mounting position 804 is perpendicular to the second wavelength light signal reflected by the sixth filter.

[0132] The second bracket 801, which directs the second wavelength optical signal through the seventh filter, also includes a second converging lens mounting position 807. This second converging lens is mounted on this second converging lens mounting position 807. This second converging lens converts the second wavelength optical signal incident on the second converging lens from parallel light to converged light. The connecting tube 602 corresponding to this second converging lens mounting position 807 also includes a second optical receiver for receiving the second wavelength optical signal that has passed through the converging lens.

[0133] Optionally, the sixth filter mounting position 803 is parallel to the fifth filter mounting position 802, the sixth filter 805 disposed in the sixth filter mounting position 803 is parallel to the fifth filter disposed in the fifth filter mounting position 802, and the optical signal of the first wavelength passing through the fifth filter is parallel to the optical signal of the second wavelength reflected by the sixth filter 805. The optical signal of the first wavelength passing through the fifth filter is parallel to the optical signal of the second wavelength reflected by the sixth filter 805, thereby enabling the first converging lens 806 and the second converging lens 807, and the first optical receiver and the second optical receiver to be disposed in parallel.

[0134] exist Figure 8 The schematic diagram of the structure of the second bracket shown may also not include the first converging lens mounting position, the second converging lens mounting position, and the converging lenses provided on each converging lens mounting position. When the second bracket 801 does not include each converging lens mounting position and the converging lenses, the first light receiver and the second light receiver or the light receiver will include a converging lens.

[0135] Alternatively, the bracket 601 and the second bracket 801 may be two separate injection-molded parts, each disposed within the connecting tube 602. Alternatively, the bracket 601 and the second bracket 801 may be integrally formed. Alternatively, the bracket 601 and the second bracket 801 may be integrally formed, including the bracket 601 and the second bracket 801 being injection-molded together, or the bracket 601 and the second bracket 801 may be injection-molded separately and then connected to form a single unit.

[0136] This application utilizes an integrally formed bracket and a fixed connecting tube, and positions the bracket within the connecting tube, simplifying the structure of the optical assembly. Furthermore, the individual optical components are positioned within the base formed by the bracket and the connecting tube, making the setup and placement of the optical assembly more convenient. Furthermore, the collimating lens is integrally injection-molded with the bracket, ensuring a more precise positioning of the collimating lens relative to the optical path.

[0137] Figure 9 This is a schematic diagram of a bracket provided in a specific embodiment of the present application. Figure 9 As shown, the bracket 901 includes Figure 7 The bracket 601 andFigure 8 The second support 801 is integrated with the support 601 and the second support 801. The structure of the support is the same as that of the support 601 Figure 7 and Figure 8 The same as the above will not be described herein.

[0138] Of course, the above Figures 7 to 9 The base, the support and the connecting pipe body included in the base are only examples in the embodiments of the present application, and cannot be used to limit the present application. In the embodiments of the present application, as long as the base, the support and the connecting pipe body are integrated through a specific connecting structure, they are all the base in the embodiments of the present application. Figures 2 to 6 The structure is integrated through a specific connecting structure, and is all the base in the embodiments of the present application.

[0139] The embodiments of the present application can also be applied to an optical module, which can include an optical assembly as shown in the embodiments of the present application. Figures 2-9 The embodiments of the present application can also be applied to a communication device, which can include the optical module.

[0140] The embodiments of the present application can also be applied to a communication device, which can include the optical module. The communication device can be an OLT or an ONU. It can also be any electronic device to which the optical module is applied.

[0141] It should be noted that the embodiments provided in the present application are only optional embodiments introduced in the present application, and those skilled in the art can design more embodiments on the basis of the embodiments, and therefore, the embodiments will not be described herein.

[0142] The optical devices described as separate components can or can not be physically separated, and part or all of the structures can be selected according to actual needs to achieve the purpose of the embodiments.

[0143] In addition, the optical devices in each embodiment of the present application can be integrated into a whole structure, or each optical device can exist physically alone, or two or more optical devices can be integrated into one unit.

[0144] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical component, characterized in that: It includes a base, a light splitting structure, a first filter and a collimating lens arranged on the base; The base is provided with a light inlet and outlet, a splitting surface of the first filter is arranged toward the light inlet and outlet, and the first light signal of the first path is incident on the splitting surface of the first filter via the light inlet and outlet; The beam splitting surface of the first filter reflects the first light signal along a second path to the collimating lens, the first path and the second path do not overlap, and the first light signal of the first path is convergent light; The collimating lens is provided on the second path, and is used for converting the first optical signal of the second path into parallel light; The first optical signal contains at least one type of optical signal wavelength; The base is provided with a second light hole, and the second light hole is used to set the collimating lens; The light splitting structure is provided on an exit path of the first light signal after passing through the collimating lens, and is configured to output the first light signal adjusted by the collimating lens as a light signal of a first wavelength and a light signal of a second wavelength according to wavelength types, wherein the light signal of the first wavelength and the light signal of the second wavelength have different wavelengths; The optical component further includes an optical receiver, the optical receiver being configured to receive the optical signal of the first wavelength and the optical signal of the second wavelength emitted by the optical splitting structure; The optical component also includes a third filter arranged on the base, and the base is provided with a first light inlet and a second light inlet, the first light inlet is arranged opposite to the inlet and outlet light ports, and the splitting surface of the third filter is arranged toward the second light inlet, the optical signal passes through the first light inlet and the second light inlet and is irradiated by the third filter, the third filter reflects the optical signal passing through the second light inlet or transmits the optical signal passing through the first light inlet and emits it toward the inlet and outlet light ports; the wavelengths of the optical signals passing through the first light inlet and the second light inlet are different, the converged optical signal emitted through the first light inlet is directly focused after passing through the third filter and the first filter, and is coupled into the optical fiber of the inlet and outlet light ports, and the converged optical signal emitted through the second light inlet is directly focused after being reflected by the third filter and transmitted through the first filter, and is coupled into the optical fiber of the inlet and outlet light ports.

2. The optical assembly according to claim 1, wherein: The second light inlet is arranged between the first filter and the first light inlet, and the second light inlet and the light splitting structure are located on two opposite sides of the optical component.

3. The optical assembly according to claim 1, wherein: The first optical signal includes an optical signal of the first wavelength and an optical signal of the second wavelength, and the optical splitting structure includes a fifth filter and a sixth filter; The fifth filter is disposed on an exit path of the optical signal of the first wavelength and the optical signal of the second wavelength through the collimating lens, the fifth filter transmits the optical signal of the first wavelength and reflects the optical signal of the second wavelength along a third path, wherein the third path does not overlap with the second path; The sixth filter is disposed on the third path, and the sixth filter reflects the optical signal of the second wavelength along a fourth path, and the fourth path does not overlap with the third path; The base is further provided with a first light outlet and a second light outlet. The first light outlet is arranged on a transmission path of the optical signal of the first wavelength transmitted by the fifth filter, and the first light outlet is used for allowing the optical signal of the first wavelength to pass through. The second light outlet is arranged on the fourth path, and the second light outlet is used for allowing the optical signal of the second wavelength to pass through.

4. The optical assembly according to claim 3, wherein: The optical component further includes a first optical receiver and a second optical receiver, wherein the first optical receiver is arranged on the outgoing path of the first optical outlet to receive the optical signal of the first wavelength, and the second optical receiver is arranged on the outgoing path of the second optical outlet to receive the optical signal of the second wavelength.

5. The optical assembly according to claim 3, wherein: The second path is parallel to the fourth path.

6. The optical assembly according to claim 3, wherein: The light splitting structure further includes a seventh filter, which is disposed on the fourth path between the sixth filter and the second light outlet, and transmits the optical signal of the second wavelength.

7. The optical assembly according to any one of claims 3 to 6, characterized in that: The base includes a connecting tube body and a bracket arranged on the connecting tube body. The bracket includes a first bracket. The first bracket is used to fix the first filter and the collimating lens, and the light inlet and outlet are opened on the first bracket.

8. The optical assembly according to claim 7, wherein: The collimating lens and the first bracket are integrally injection-molded.

9. The optical assembly according to claim 8, wherein: The bracket further includes a second bracket, and the second bracket is used to fix the light splitting structure.

10. The optical assembly according to claim 9, wherein: The optical assembly further includes a first converging lens disposed on the second path and a second converging lens disposed on the fourth path, and the second bracket is further used to fix the first converging lens and the second converging lens.

11. The optical assembly according to claim 10, wherein: The first converging lens and the second bracket are integrally injection-molded, and the second converging lens and the second bracket are integrally injection-molded.

12. The optical assembly according to claim 11, wherein: The first bracket and the second bracket are integrally injection-molded.

13. The optical assembly according to any one of claims 1 to 6, characterized in that: The optical component also includes a pin and a core. A core hole is provided inside the pin. The core is fixed in the core hole, and one end of the core protrudes from the pin. The end of the core protruding from the pin is arranged in the light inlet and outlet port, and the core is positioned by the light inlet and outlet port.

14. The optical assembly according to any one of claims 1 to 6, characterized in that: The optical component further includes a wave combining and transmitting device arranged on the base, and the wave combining and transmitting device is arranged opposite to the optical inlet and outlet; the wave combining and transmitting device transmits a third optical signal and a fourth optical signal, and the third optical signal and the fourth optical signal are transmitted toward the optical inlet and outlet.

15. An optical module, characterized in that: The optical module comprises the optical component according to any one of claims 1 to 14.

16. A communication device, characterized in that: The communication device comprises the optical module according to claim 15.

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