Dual-wavelength parallel light emission structure TOCAN
Through the dual LD-emitting parallel light COC structure, light of different wavelengths is combined and emitted by using collimating lenses and special-shaped collimating lenses, solving the complex and large optical path problems of existing TOCAN devices, and achieving efficient emission and modular design of dual-wavelength signals.
Patent Information
- Application Number
- CN202422600091.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-28
AI Technical Summary
Existing TOCAN devices can only support single-wavelength light source signals, which have problems such as complex optical paths, sensitive external influences, large device size, and multi-optical path design that leads to reduced coupling yield and high process costs.
The dual LD emits parallel light COC structure is adopted, and light of different wavelengths is collimated by using a collimation lens and a special-shaped collimation lens and combined with waves through a 45° inclined converged light slide to achieve the combined emission of the dual-wavelength signal.
The optical path system is simplified, the device volume is reduced, the coupling yield is improved, the process cost is reduced, and the modular combination of multi-wavelength signals is supported.
Smart Images
Figure CN223193221U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of optical signals, in particular to a dual-wavelength parallel light emitting structure TOCAN. Background Art
[0002] Existing transmitting TOCANs only support single-wavelength optical signals, meaning they can only transmit and process information from a single signal source. However, with the development of optical devices and technological advancements, there is a need for a single optical device to simultaneously transmit multiple wavelengths. For example, a COMBO PON system uses two transmitting TO56 TOCANs. However, existing technologies for detecting dual-wavelength signals still face several challenges. These include complex optical paths, which are sensitive to external influences; the bulky transmitter leads to larger device sizes, leaving limited space for module design; and the multiple optical paths reduce coupling yield and increase manufacturing costs. To address these issues, the following solution is proposed. Utility Model Content
[0003] The purpose of the utility model is to provide a dual-wavelength parallel light emitting structure TOCAN, which has the advantages of streamlining the device optical path and reducing the complexity of the optical path system.
[0004] The above technical objectives of the present invention are achieved through the following technical solutions:
[0005] A dual-wavelength parallel light emitting structure TOCAN, comprising a dual-LD emitting parallel light COC, wherein the dual-LD emitting parallel light COC is provided with a light source 1 and a light source 2, wherein the light source 2 is located obliquely below the light source 1, and the dual-LD emitting parallel light COC is further provided with a collimating lens, a special-shaped collimating lens and a light-collecting glass, wherein the light-collecting glass is inclined at 45°, the light source 1 and the light source 2 are both arranged horizontally, the collimating lens is located on the light-emitting side of the light source 1, and the collimating lens is located between the light source 1 and the light-collecting glass, and the collimating lens is located between the light source 1 and the light-collecting glass. The lens is used to collimate the light ray emitted by light source one so that the light ray is captured in a horizontal state onto the light-collecting glass slide. The special-shaped collimating lens is located on the light-emitting side of light source two, and the special-shaped collimating lens is located below the light-collecting glass slide. The end of the special-shaped collimating lens away from light source two is inclined at 45°. The special-shaped collimating lens is used to collimate the light ray emitted by light source two into parallel light in the horizontal direction, and then reflect the light ray into parallel light pointing vertically upward. The light ray passing through the special-shaped collimating lens is emitted into the light-collecting glass slide from below.
[0006] Preferably, the end of the collimating lens close to the light source is in the shape of an arc protruding outward, and the rest of the collimating lens is in the shape of a rectangular parallelepiped. The midline of the arc-shaped portion of the collimating lens is located on the same horizontal line as the light source. The arc-shaped portion of the collimating lens is used to gather the light emitted by the light source and make it parallel in the horizontal direction.
[0007] Preferably, the special-shaped collimating lens is provided with a focusing portion on the side close to the second light source, and the focusing portion is in an outwardly protruding arc shape. The midline of the focusing portion is located on the same horizontal line as the second light source, and the second focusing portion is used to focus the second light emitted by the second light source and make it parallel in the horizontal direction.
[0008] Preferably, the special-shaped collimating lens is provided with a focusing portion on the side close to the second light source, and the focusing portion is in an outwardly protruding arc shape. The midline of the focusing portion is located on the same horizontal line as the second light source, and the second focusing portion is used to focus the second light emitted by the second light source and make it parallel in the horizontal direction.
[0009] Preferably, the light-collecting glass is a one-way transmission glass, the second light is transmitted through the lower end surface of the light-collecting glass, and the first light is reflected through the upper end surface of the light-collecting glass.
[0010] Preferably, an MPD COC is further provided on one side of the dual LD emitting parallel light COC, and the MPD COC is used to receive light intensity information and provide feedback.
[0011] The beneficial effects of the utility model are:
[0012] 1. Through the special-shaped collimating lens and the 45-degree focusing glass, two different wavelength signals are combined, so there is no need for two TOs to transmit different wavelength signals separately;
[0013] 2. Reduce the complexity of the optical path system, streamline the device optical path, and improve the process yield;
[0014] 3. Reduce the complexity of the optical path system and reduce the size of the device;
[0015] 4. The light source adopts COC modular solution, which can be recombined to add new functions as needed. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural diagram of an embodiment;
[0017] Figure 2 This is a schematic diagram of the structure of the dual LD emitting parallel light COC in the embodiment;
[0018] Figure 3 Schematic diagram of the structure of MPD COC in Example;
[0019] Figure 4 Schematic diagram of the structure of combining light in the embodiment.
[0020] Reference numerals: 1. Dual LD emitting parallel light COC; 2. Light source one; 3. Light source two; 4. Collimating lens; 5. Special-shaped collimating lens; 6. Light-collecting glass; 7. MPD COC. DETAILED DESCRIPTION
[0021] The following is only a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions under the concept of the present invention should fall within the scope of protection of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.
[0022] like Figures 1 to 4 As shown, a dual-wavelength parallel light emitting structure TOCAN includes a dual-LD parallel light emitting COC1 and an MPD COC7. The dual-LD parallel light emitting COC1 is provided with a light source 1 2 and a light source 2 3. Light sources 1 2 and 2 3 respectively emit signals of different wavelengths, which are collimated on the dual-LD parallel light emitting COC1 and then combined. Finally, the light intensity information is received by the MPD COC7 and fed back.
[0023] Light source 1-2 is horizontally arranged at a position slightly above the dual LD emitting parallel light COC1. In this design, the light output end of light source 1-2 is arranged toward the left. A collimating lens 4 and a light collecting glass 6 are provided on the dual LD emitting parallel light COC1. The collimating lens 4 and the light collecting glass 6 are both located on the left side of light source 1-2, and the collimating lens 4 is located between the light collecting glass 6 and light source 1-2. The right side of the collimating lens 4 is in an arc shape protruding to the right, and the rest of the part is a rectangular parallelepiped. The midline of the arc portion of the collimating lens 4 is on the same horizontal line as light source 1-2. The light emitted by light source 1-2 will first contact the arc portion on the right side of the collimating lens 4. The arc portion of the collimating lens 4 will collimate the divergent light, so that the light remains parallel and irradiates horizontally to the left.
[0024] The light-collecting glass 6 is tilted at a 45° angle. In this design, the 45° tilt refers to a 45° tilt to the left. That is, in a rectangular coordinate system with the lower end of the light-collecting glass 6 as the origin, the light-collecting glass 6 is located in the second quadrant, and the angle between the light-collecting glass 6 and the positive direction of the X-axis is 135°. After being collimated by the collimating lens 4, the light 1 will be irradiated to the right side of the light-collecting glass 6, which will reflect the light 1 so that the light 1 will be irradiated vertically upward.
[0025] The dual-LD parallel light emitter COC1 is also equipped with a shaped collimating lens 5. A light-collecting portion, protruding outward in an arc, is located on the side of the shaped collimating lens 5 near the second light source 3. The second light source 3 is located to the lower left of the first light source 2. The shaped collimating lens 5 is located below the light-collecting glass 6, with the centerline of the light-collecting portion aligned with the second light source 3. The second light source 3 emits a diverging light beam 2, which, upon striking the light-collecting portion, is collimated into a horizontal, leftward-facing light beam 2.
[0026] The end of the shaped collimating lens 5, away from the second light source 3, is a reflective portion, tilted at a 45° angle. This 45° angle corresponds to the tilt angle of the light-collecting glass 6 mentioned above. Light beams 2, collimated by the focusing portion, enter the shaped collimating lens 5 and are reflected by the reflective portion. The reflected light beams 2 then shine vertically upward.
[0027] The height of the focusing section corresponds to the middle height of the reflective section. Horizontally parallel light ray 2, gathered by the focusing section, strikes the middle portion of the reflective section. Light ray 2, reflected at this location, is just below the location where light ray 1 was reflected by light-collecting glass 6. Light-collecting glass 6 is a one-way transmission glass, a conventional 45-degree glass used in conventional BOSAs. Light ray 2 can be transmitted from the bottom end of light-collecting glass 6, allowing it to overlap upward with light ray 1. Light ray 1 and light ray 2 are ultimately combined and converged into light along the same path. Finally, the MPD COC 7 receives the intensity information of the combined light and provides feedback.
[0028] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A dual-wavelength parallel light emitting structure TOCAN, comprising dual LDs emitting parallel light COC (1), characterized in that: The dual LD emitting parallel light COC (1) is provided with a light source 1 (2) and a light source 2 (3), the light source 2 (3) is located obliquely below the light source 1 (2), and the dual LD emitting parallel light COC (1) is also provided with a collimating lens (4), a special-shaped collimating lens (5) and a light-collecting glass (6), the light-collecting glass (6) is arranged at a 45° tilt, the light source 1 (2) and the light source 2 (3) are both arranged horizontally, the collimating lens (4) is located on the light-emitting side of the light source 1 (2), and the collimating lens (4) is located between the light source 1 (2) and the light-collecting glass (6), and the collimating lens (4) is used to collimate the light source The special-shaped collimating lens (5) is located on the light-emitting side of the second light source (3), and the special-shaped collimating lens (5) is located below the light-collecting glass (6). The special-shaped collimating lens (5) is inclined at 45 degrees at one end away from the second light source (3). The special-shaped collimating lens (5) is used to collimate the second light source (3) into parallel light in the horizontal direction, and then reflect the second light into parallel light pointing vertically upward. The second light source (5) passing through the special-shaped collimating lens (5) is incident on the light-collecting glass (6) from below.
2. The dual-wavelength parallel light emitting structure TOCAN according to claim 1, characterized in that: The end of the collimating lens (4) close to the light source (2) is in the shape of an arc that protrudes outward, and the rest of the collimating lens (4) is in the shape of a rectangular parallelepiped. The midline of the arc portion of the collimating lens (4) is located on the same horizontal line as the light source (2). The arc portion of the collimating lens (4) is used to gather the light emitted by the light source (2) and make it parallel in the horizontal direction.
3. The dual-wavelength parallel light emitting structure TOCAN according to claim 2, characterized in that: The special-shaped collimating lens (5) is provided with a focusing portion on a side close to the second light source (3). The focusing portion is in an outwardly protruding arc shape. The centerline of the focusing portion is located on the same horizontal line as the second light source (3). The second focusing portion is used to focus the second light emitted by the second light source (3) and make it parallel in the horizontal direction.
4. The dual-wavelength parallel light emitting structure TOCAN according to claim 3, characterized in that: The inclined surface of the special-shaped collimating lens (5) away from the second light source (3) is a reflective portion, and the height of the focusing portion corresponds to the height of the middle position of the reflective portion. The second horizontally parallel light beam gathered by the focusing portion is irradiated on the middle part of the reflective portion.
5. The dual-wavelength parallel light emitting structure TOCAN according to claim 1, characterized in that: The light-gathering glass (6) is a one-way transmission glass, the second light is transmitted at the lower end surface of the light-gathering glass (6), and the first light is reflected at the upper end surface of the light-gathering glass (6).
6. The dual-wavelength parallel light emitting structure TOCAN according to claim 1, characterized in that: An MPD COC (7) is also provided on one side of the dual-LD parallel light emitting COC (1), and the MPD COC (7) is used to receive light intensity information and provide feedback.