An unbiased collimator

Abstract

This invention discloses an unbiased collimator, comprising an outer ceramic tube, a self-focusing lens at one end of the outer ceramic tube cavity, and an inner ceramic tube at the other end. An optical fiber is disposed within the cavity of the inner ceramic tube. The end face of the self-focusing lens away from the inner ceramic tube is a first plane, and the end face closer to the inner ceramic tube is a first inclined plane. The end face of the inner ceramic tube closer to the self-focusing lens is a second inclined plane, and the first and second inclined planes are parallel. This invention proposes an unbiased collimator that can reduce the power density of the mating end face and improve its power handling capability, thereby achieving the purpose of power handling capability.

Description

Technical Field

[0001] This invention relates to the field of collimator technology, and more particularly to an unbiased collimator. Background Technology

[0002] With the widespread application of optical links, the application environment for fiber optic connectors is becoming increasingly demanding. In high-power optical transmission, fiber optic connectors are currently a weak point. At present, high-power transmission links often use fusion splicing to connect devices. This method is not only complex, but also difficult to protect the fusion splice, making it a weak point in the entire optical link. Conventional fiber optic connectors have fiber endface power handling capabilities of less than 1W, which cannot meet the needs of current customers. Summary of the Invention

[0003] Based on the technical problems existing in the background art, the present invention proposes an unbiased collimator, which can reduce the power density of the docking end face and improve the power tolerance of the docking end face, thereby achieving the purpose of power tolerance.

[0004] An unbiased collimator includes an outer ceramic tube, a self-focusing lens at one end of the outer ceramic tube cavity and an inner ceramic tube at the other end, and an optical fiber inside the inner ceramic tube cavity; the end face of the self-focusing lens away from the inner ceramic tube is a first plane, the end face near the inner ceramic tube is a first inclined plane, and the end face of the inner ceramic tube near the self-focusing lens is a second inclined plane, with the first inclined plane and the second inclined plane being parallel.

[0005] Preferably, an end cap is provided at one end of the inner ceramic tube near the self-focusing lens. The end of the end cap near the self-focusing lens is flush with the second inclined surface, and the end away from the self-focusing lens is connected to the optical fiber. The end cap is an expanded core type optical fiber.

[0006] Preferably, the first inclined surface of the self-focusing lens and the second inclined surface of the inner ceramic tube are fixedly connected by a first ultraviolet adhesive.

[0007] Preferably, the outer diameter of the self-focusing lens is smaller than the inner diameter of the outer ceramic tube, and a second ultraviolet adhesive is provided in the gap between the self-focusing lens and the outer ceramic tube.

[0008] Preferably, the first plane and the first inclined plane of the self-focusing lens, as well as the second inclined plane of the inner ceramic tube, are all coated with an anti-reflection film.

[0009] Preferably, the end of the inner ceramic tube away from the self-focusing lens extends to the outside of the outer ceramic tube and is provided with a tail sleeve in an interference fit.

[0010] Preferably, the end of the optical fiber away from the end cap extends to the outside of the inner ceramic tube and is fitted with an optical fiber outer sheath, and the optical fiber outer sheath is fixedly connected to the inner wall of the tail tube by 353ND glue.

[0011] Beneficial effects of this invention:

[0012] This invention proposes an unbiased collimator. The end faces of the inner ceramic tube and the self-focusing lens are both designed with bevels, effectively improving the return loss of the product. An end cap is placed between the self-focusing lens and the optical fiber. The transmitted light spot enters the end cap from the optical fiber for initial amplification, and then passes through the self-focusing lens for further amplification of the output area. This reduces the power density at the mating end face and improves the power handling capability of the mating end face, thereby achieving the desired power handling capability. Applying this unbiased collimator to connectors enables a power handling capacity of 5W, significantly improving the power handling range of connector contacts. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 A schematic diagram of an unbiased collimator;

[0015] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0016] Figure 3 for Figure 2 A schematic diagram of the structure without UV adhesive is shown.

[0017] Figure 4 This is a schematic diagram of the structure of an unbiased collimator used in conjunction with a tail sleeve.

[0018] In the figure: 1-outer ceramic tube, 2-self-focusing lens, 21-first plane, 22-first inclined plane, 3-inner ceramic tube, 31-second inclined plane, 4-end cap, 5-optical fiber, 51-optical fiber outer sheath, 6-first UV adhesive, 7-second UV adhesive, 8-tail tube, 9-353ND adhesive. Detailed Implementation

[0019] The present invention will be further explained below with reference to specific embodiments.

[0020] Reference Figure 1-4An unbiased collimator includes an outer ceramic tube 1, a self-focusing lens 2 at one end of the cavity of the outer ceramic tube 1, and an inner ceramic tube 3 at the other end. An optical fiber 5 is disposed in the cavity of the inner ceramic tube 3. The end face of the self-focusing lens 2 away from the inner ceramic tube 3 is a first plane 21, and the end face of the self-focusing lens 2 close to the inner ceramic tube 3 is a first inclined plane 22. The end face of the inner ceramic tube 3 close to the self-focusing lens 2 is a second inclined plane 31. The first inclined plane 22 and the second inclined plane 31 are parallel.

[0021] An end cap 4 is provided at one end of the inner ceramic tube 3 near the self-focusing lens 2. The end of the end cap 4 near the self-focusing lens 2 is flush with the second inclined surface 31, and the end away from the self-focusing lens 2 is connected to the optical fiber 5. The end cap 4 is a core-expanding type optical fiber, which has the characteristic of expanding the light spot and the light spot distribution is uniform. The end cap 4 is fixed in the cavity of the inner ceramic tube 3 by fusion splicing and is fixedly connected to one end of the optical fiber 5.

[0022] The first inclined surface 22 of the self-focusing lens 2 and the second inclined surface 31 of the inner ceramic tube 3 are fixedly connected by a first ultraviolet adhesive 6. The outer diameter of the self-focusing lens 2 is smaller than the inner diameter of the outer ceramic tube 1, and a second ultraviolet adhesive 7 is provided in the gap between the self-focusing lens 2 and the outer ceramic tube 1.

[0023] Because the inner diameter of the outer ceramic tube 1 is larger than the outer diameter of the self-focusing lens 2, the self-focusing lens can be flexibly adjusted, ensuring the output light spot is collimated without deviation. During installation, the first UV adhesive 6 is used to pre-fix the self-focusing lens 2 and the inner ceramic tube 3. After confirming the collimation of the output light spot without deviation, the second UV adhesive 7 is squeezed into the gap between the self-focusing lens 2 and the outer ceramic tube 1. The first UV adhesive 6 requires a high viscosity, 35,000-50,000 cps, to ensure a gap between the self-focusing lens 2 and the inner ceramic tube 3 and to provide a pre-fixing effect. The second UV adhesive 7 requires a low viscosity coefficient, less than 600 cps, to generate capillary action in the pores, facilitating the fixation between the outer wall of the self-focusing lens 2 and the inner wall of the outer ceramic tube 1.

[0024] The first plane 21 and the first inclined plane 22 of the self-focusing lens 2, as well as the second inclined plane 31 of the inner ceramic tube 3, are all coated with anti-reflection films, which can reduce coupling loss during the coupling process.

[0025] The inner ceramic tube 3, at its end furthest from the self-focusing lens 2, extends to the outside of the outer ceramic tube 1 and is fitted with a tail sleeve 8 with an interference fit. The optical fiber 5, at its end furthest from the end cap 4, extends to the outside of the inner ceramic tube 3 and is fitted with an optical fiber outer sheath 51. The optical fiber outer sheath 51 is fixedly connected to the inner wall of the tail sleeve 8 by 353ND adhesive 9. The tail sleeve 8 provides better support and protection for the optical fiber end of the collimator.

[0026] This invention proposes an unbiased collimator. The end faces of the inner ceramic tube and the self-focusing lens are both designed with bevels, effectively improving the return loss of the product. An end cap is placed between the self-focusing lens and the optical fiber. The transmitted light spot enters the end cap from the optical fiber for initial amplification, and then passes through the self-focusing lens for further amplification of the output area. This reduces the power density at the mating end face and improves the power handling capability of the mating end face, thereby achieving the desired power handling capability. Applying this unbiased collimator to connectors enables a power handling capacity of 5W, significantly improving the power handling range of connector contacts.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A non-biased collimator, comprising an outer ceramic tube (1), characterized in that, The outer ceramic tube (1) has a self-focusing lens (2) at one end and an inner ceramic tube (3) at the other end. An optical fiber (5) is installed inside the cavity of the inner ceramic tube (3). The self-focusing lens (2) has a first plane (21) at one end away from the inner ceramic tube (3) and a first inclined plane (22) at one end near the inner ceramic tube (3). The inner ceramic tube (3) has a second inclined plane (31) at one end near the self-focusing lens (2). The first inclined plane (22) and the second inclined plane (31) are parallel. The first inclined plane (22) of the self-focusing lens (2) is parallel to the inner ceramic tube (3). The second inclined surfaces (31) of the tube (3) are fixedly connected by the first UV adhesive (6); the outer diameter of the self-focusing lens (2) is smaller than the inner diameter of the outer ceramic tube (1), and the gap between the self-focusing lens (2) and the outer ceramic tube (1) is provided with the second UV adhesive (7); the viscosity of the first UV adhesive (6) is 35000-50000cps, so that the self-focusing lens (2) and the inner ceramic tube (3) have a gap and produce a pre-fixing effect; the viscosity of the second UV adhesive (7) is less than 600cps, so that the capillary phenomenon is generated in the pores, and the outer wall of the self-focusing lens (2) is fixed to the inner wall of the outer ceramic tube (1).

2. The non-biased collimator according to claim 1, characterized in that, An end cap (4) is provided at one end of the inner ceramic tube (3) near the self-focusing lens (2). The end cap (4) near the self-focusing lens (2) is flush with the second inclined surface (31), and the end away from the self-focusing lens (2) is connected to the optical fiber (5). The end cap (4) is an expanded core type optical fiber.

3. The non-biased collimator according to claim 1, characterized in that, The first plane (21), the first inclined plane (22) of the self-focusing lens (2) and the second inclined plane (31) of the inner ceramic tube (3) are all coated with anti-reflection film.

4. The non-biased collimator according to claim 2, characterized in that, The inner ceramic tube (3) extends from one end away from the self-focusing lens (2) to the outside of the outer ceramic tube (1) and is provided with a tail sleeve (8) in an interference fit.

5. A non-biased collimator according to claim 4, characterized in that, The end of the optical fiber (5) away from the end cap (4) extends to the outside of the inner ceramic tube (3) and is fitted with an optical fiber outer sheath (51). The optical fiber outer sheath (51) is fixedly connected to the inner wall of the tail tube (8) by 353ND glue (9).

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