Small-size optical receiver assembly

Abstract

The utility model discloses a small-size optical receiver assembly comprising an optical fiber end collimating lens which is arranged at the incident end of a light beam; a reflective element; the wavelength division demultiplexing module is used for decomposing the light beams reflected by the reflecting element and transmitting the light beams to the wavelength division end collimating lens; the wavelength division end collimating lens is used for receiving the light beams decomposed by the wavelength division multiplexing module; and the side surface of the reflecting prism is obliquely arranged at the receiving end of the wavelength division end collimating lens. A reflecting element is additionally arranged between a lens and a wavelength division multiplexing module, light beams are folded back through the reflecting element and enter the wavelength division multiplexing module on the side edge, and the side-by-side stacking mode is beneficial to improving the integration level of the elements, reducing the occupied space in the length direction of the assembly and achieving wavelength division propagation of the light beams.

Description

Technical Field

[0001] The utility model relates to the technical field of application of high-speed transmission wavelength division multiplexing (WDM) of optical communication optical modules, in particular to a small-size optical receiver component. Background Art

[0002] The de-wavelength division multiplexing optical receiver components in the prior art usually use a lens and a de-wavelength division multiplexing module (Demux, Z-block) to be placed flush to achieve axial linear transmission of the light beam. Its main disadvantage is that the component occupies a large volume, has low space utilization, and is long in size, which is not conducive to integrated and miniaturized applications.

[0003] To this end, the utility model provides a small-size optical receiver component to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that the wavelength division multiplexing optical receiver component occupies a large volume, has low space utilization, is long in size, and is not conducive to integrated and miniaturized applications.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A small size optical receiver assembly, comprising:

[0007] An optical fiber end collimating lens, wherein the optical fiber end collimating lens is arranged at the incident end of the light beam;

[0008] Reflective element;

[0009] A wavelength division demultiplexing module, the wavelength division demultiplexing module is used to decompose the light beam reflected by the reflective element and transmit it to the wavelength division end collimating lens;

[0010] A wavelength division end collimating lens, wherein the wavelength division end collimating lens is used to receive the light beam decomposed by the wavelength division demultiplexing module;

[0011] A reflecting prism, the side surface of which is inclined, is arranged at the receiving end of the wavelength division end collimating lens.

[0012] Furthermore, the wavelength division demultiplexing module includes:

[0013] Prism;

[0014] WDM filters, wherein at least four WDM filters are arranged on the light exit surface of the prism;

[0015] A light-permeable block is arranged at the lower end of the prism.

[0016] Furthermore, the reflective surface of the reflective element is polished and coated with a high-reflective film.

[0017] Furthermore, the light-transmitting surface of the light-transmitting block is polished and coated with an anti-reflection film.

[0018] Furthermore, the wavelength division end collimating lens is an array lens or a single lens arranged side by side.

[0019] Furthermore, the inclined surface of the reflecting prism is a reflecting surface, and a layer of high-reflection film is coated on the surface.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] By adding a reflective element between the lens and the de-wavelength division multiplexing module, the light beam is reflected back through the reflective element and enters the de-wavelength division multiplexing module on the side. The side-by-side stacking method is beneficial to improving the integration of components, reducing the occupied space in the length direction of the component, and realizing the wavelength division propagation of the light beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a top view of the utility model.

[0024] In the figure: 1. collimating lens at the end of optical fiber; 2. reflecting element; 301. prism; 302. WDM filter; 303. light-transmitting block; 4. collimating lens at the end of wavelength division; 5. reflecting prism; 6. optical fiber. DETAILED DESCRIPTION

[0025] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0026] The applicant believes that the wavelength division multiplexing optical receiver components in the prior art occupy a large volume, have low space utilization, and are relatively long, which is not conducive to integrated and miniaturized applications.

[0027] To this end, the applicant designed Figure 1-2A small-size optical receiver component is shown, comprising: a fiber end collimating lens 1, which is arranged at the incident end of the light beam; a reflective element 2; a demultiplexing module, which is used to decompose the light beam reflected by the reflective element 2 and transmit it to the wavelength division end collimating lens 4; a wavelength division end collimating lens 4, which is used to receive the light beam decomposed by the demultiplexing module; a reflecting prism 5, the side of which is inclined and arranged at the receiving end of the wavelength division end collimating lens 4. By adding a reflective element 2 between the fiber end collimating lens 1 and the demultiplexing module, the light beam is turned back through the reflective element 2 and enters the demultiplexing module on the side. After being decomposed by the demultiplexing module, the light beam is transmitted to the wavelength division end collimating lens 4. The wavelength division end collimating lens 4 adopts an array lens or a single lens arranged side by side. The side-by-side stacking of the fiber end collimating lens 1 and the demultiplexing module is conducive to improving the component integration and reducing the occupied space in the length direction of the component.

[0028] The small-size optical receiver component of this embodiment, the demultiplexing module includes: a prism 301; a WDM filter 302, at least four of which are arranged on the light emitting surface of the prism 301; a light-transmitting block 303, which is arranged at the lower end of the prism 301; WDM is the abbreviation of Wavelength Division Multiplexing, which is a transmission technology used to increase the bandwidth on the existing optical fiber backbone network.

[0029] In the small-sized optical receiver assembly of this embodiment, the reflective surface of the reflective element 2 is polished and coated with a high-reflection film to reduce the refraction loss of the light beam; the light-transmitting surface of the light-transmitting block 303 is polished and coated with an anti-reflection film. After the light beam reaches the light-transmitting block 303, it needs to enter the prism 301. The anti-reflection film can avoid the reflection loss of the light beam on the surface of the light-transmitting block 303; the wavelength division end collimating lens 4 is an array lens or a single lens arranged side by side; the inclined surface of the reflecting prism 5 is a reflective surface, and a layer of high-reflection film is coated on the surface.

[0030] In the small-size optical receiver assembly of this embodiment, the reflective element 2 is a reflective mirror, a reflective prism or other reflective components.

[0031] Working principle: Figure 2 The lower left end shown is the optical fiber end. The light beam is transmitted to the surface of the reflective element 2 through the collimating lens, and then passes through the transparent block 303 at the lower end of the de-wavelength division multiplexing module. After being separated into four light beams of different wavelengths by the de-wavelength division multiplexing module, the component light beam is received after passing through the wavelength division end collimating lens 4 and the reflecting prism 5.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A small size optical receiver assembly, characterized in that: include: An optical fiber end collimating lens, wherein the optical fiber end collimating lens is arranged at the incident end of the light beam; Reflective element; A wavelength division demultiplexing module, the wavelength division demultiplexing module is used to decompose the light beam reflected by the reflective element and transmit it to the wavelength division end collimating lens; A wavelength division end collimating lens, wherein the wavelength division end collimating lens is used to receive the light beam decomposed by the wavelength division demultiplexing module; A reflecting prism, the side surface of which is inclined, is arranged at the receiving end of the wavelength division end collimating lens.

2. A small-size optical receiver assembly according to claim 1, characterized in that: The demultiplexing module comprises: Prism; WDM filters, wherein at least four WDM filters are arranged on the light exit surface of the prism; A light-transmitting block is arranged at the lower end of the prism.

3. A small-size optical receiver assembly according to claim 1, characterized in that: The reflective surface of the reflective element is polished and coated with a high-reflective film.

4. A small-size optical receiver assembly according to claim 2, characterized in that: The light-transmitting square block has a polished light-transmitting surface and is coated with an anti-reflection film.

5. A small-size optical receiver assembly according to claim 1, characterized in that: The wavelength division end collimating lens is an array lens or a single lens arranged side by side.

6. A small-size optical receiver assembly according to claim 1, characterized in that: The inclined surface of the reflecting prism is a reflecting surface, and a layer of high-reflection film is coated on the surface.

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