CN211148975U

CN211148975U - High-reliability adjustable optical attenuator integrating TAP (TAP) -PD (Passive optical network)

Info

Publication number: CN211148975U
Application number: CN202020090166.8U
Authority: CN
Inventors: 宋智华; 贾春艳; 肖鹏; 华金娥
Original assignee: Fuzhou Gaoyi Communication Co Ltd
Current assignee: Fuzhou Gaoyi Communication Co Ltd; Photop Technologies Inc
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-07-31
Anticipated expiration: 2030-01-16

Abstract

The utility model discloses a high reliability integrated TAP-PD adjustable optical attenuator, which comprises an outer sealing tube, an insulating base, an optical fiber collimator and an optical detector; the optical fiber collimator and the optical detector are sequentially arranged in the outer sealing tube, and the optical detector is fixed on the end face of the inner side of the insulating base; the optical fiber collimator is fixedly connected with the insulating base through a structural member, and the structural member is arranged inside the outer sealing pipe. The utility model discloses an use special design's structure, the material that makes the adjustable optical attenuator of integrated TAP-PD is few, and the encapsulation size is little, assembly process is simple, low cost.

Description

High-reliability adjustable optical attenuator integrating TAP (TAP) -PD (Passive optical network)

Technical Field

The utility model relates to an optical fiber communication field especially relates to a high reliability integrated TAP-PD's variable optical attenuator.

Background

In an optical fiber communication network which is continuously developed, along with the continuous improvement of transmission rate, the requirements on miniaturization and integration of communication equipment and an optical module are more and more obvious, an optical attenuator is used as a common optical passive device, and the integration of size and function greatly helps to save the space of the module.

The driving modes of the variable attenuator commonly seen in the market are a MEMS rotating mirror type and a MEMS baffle type, and the size of the device is mainly limited by the size of a MEMS chip. The MEMS mirror-rotating chip is relatively small in size, but requires complicated processing of the optical path if it is integrated.

As shown in fig. 1a and 1b, the complete optical path composition of the variable optical attenuator of the MEMS barrier integrated TAP-PD includes: the device comprises a double-core collimator (comprising a double-core optical fiber head 1, an input optical fiber 2 and an output optical fiber 3), a light blocking chip 4, a self-focusing lens 5, a light splitting device 6 and a light detection chip 7. Wherein, one end surface of the double-core collimator and the self-focusing lens 5 is a wedge angle surface with a fixed angle, and is coated with an antireflection film layer.

Incident light passes through the light blocking chip from the input optical fiber line 2, passes through the self-focusing lens 5, and after the collimation effect of the self-focusing lens 5, part of collimated light is reflected by the light splitting device 6, and the light splitting device 6 can be directly coated on the end face of the self-focusing lens 5 by adopting a light splitting film layer. Is coupled back to the output optical fiber line 3 through the self-focusing lens 5, and collimated light transmitted through the light splitting device 6 is received by the light detector 7 and converted into photocurrent.

Under the drive of no external energy, the blocking sheet of the light blocking type chip is in an initial state, and the edge of the blocking sheet is tangent to the outer diameter of a light spot emergent from the input optical fiber in the initial state. When the external energy drive is gradually enhanced, the displacement of the baffle plate is gradually increased to shield the light spot emitted by the input optical fiber, and the increase of the displacement of the baffle plate is accompanied with the decrease of the energy which can be coupled into the self-focusing lens. Since the attenuated energy is distributed in equal proportion by the light splitting device, the photocurrent received at the photodetector end can indirectly feed back the energy of the light coupled back to the output optical fiber.

The MEMS barrier chip and the VOA manufactured by the MEMS barrier chip are large in size, but the TAP-PD function can be integrated on the premise that the complexity is basically unchanged.

Disclosure of Invention

In order to meet the technical requirement, the utility model provides a compact structure, the assembly is simple, and thermal stability is with low costs, is fit for the variable optical attenuator of the integrated TAP-PD of high reliability that requires high to the space.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-reliability adjustable optical attenuator integrating TAP-PD comprises an outer sealing tube, an insulating base, an optical fiber collimator and an optical detector, wherein the insulating base is fixed at one end of the outer sealing tube, and the other end of the outer sealing tube is provided with a fiber guide hole; the optical fiber collimator and the optical detector are sequentially arranged in the outer sealing tube, and the optical detector is fixed on the end face of the inner side of the insulating base; the optical fiber collimator sequentially comprises a double-core optical fiber head, a light blocking type chip and a self-focusing lens, wherein the double-core optical fiber head is at least provided with an input optical fiber and an output optical fiber, one end of the self-focusing lens, which faces to the optical detector, is provided with a light splitting device, and the optical detector is used for receiving light transmitted by the light splitting device and converting photoelectric signals of the light; two first pin feet and two second pin feet are fixedly connected to the outer end face of the insulating base, the two first pin feet are respectively connected and conducted with two pad feet of the optical detector, and the two second pin feet are respectively connected and conducted with two pad feet of the light blocking type chip; the optical fiber collimator is fixedly connected with the insulating base through a structural member, and the structural member is arranged inside the outer sealing pipe.

Preferably, the end face of the double-core optical fiber head facing the light blocking chip and the end face of the self-focusing lens facing the light blocking chip are both wedge-angle surfaces and are respectively plated with an antireflection film layer.

Preferably, the light blocking chip is a chip with an electrically driven barrier for generating displacement.

Preferably, the light splitting device is directly plated on the end face of the self-focusing lens facing the light detector as a film layer.

Preferably, the double-core optical fiber head, the light blocking chip and the self-focusing lens are fixedly connected in sequence through end face gluing.

Preferably, the double-core optical fiber head, the light blocking chip and the self-focusing lens are sequentially fixed in a sleeve through adhesive sleeve.

Preferably, the structural member is a positioning groove on the inner end face of the insulating base, and the self-focusing lens is fixed in the positioning groove in an adhesive manner.

Preferably, the structural member is a connecting pipe, the self-focusing lens is glued and fixedly sleeved in one end of the connecting pipe, and the other end of the connecting pipe is glued and fixedly connected with the inner end face of the insulating base.

Preferably, the structural member positioning seat and the positioning seat are fixed in the outer sealing tube in an adhesive manner, the double-core optical fiber head is fixed on the positioning seat in an adhesive manner, the two second pin legs respectively penetrate through corresponding guide holes in the insulating base and are fixedly connected with the positioning seat, and the guide holes are filled and sealed with glue or metal solder.

Preferably, the fiber guide holes are filled and sealed by glue or metal solder.

The utility model adopts the above technique, have following technological effect: by using the specially designed structural member, the variable optical attenuator integrated with the TAP-PD has the advantages of less materials, small packaging size, simple assembly process and low cost. Meanwhile, the sensitivity of the light blocking chip and the collimator is considered, the sensitive position is opened as far as possible in the assembling process, and the high temperature stability and long-term reliable performance of the device can be guaranteed.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments;

FIG. 1a is a side view of a prior art TAP-PD variable optical attenuator;

FIG. 1b is a top view of a prior art TAP-PD variable optical attenuator;

fig. 2 is a schematic view of embodiment 1 of the present invention;

fig. 3 is a schematic view of embodiment 2 of the present invention;

fig. 4 is a schematic view of embodiment 3 of the present invention;

fig. 5 is a schematic view of embodiment 4 of the present invention.

Detailed Description

As shown in one of fig. 2-5, the utility model relates to an integrated TAP-PD's of high reliability adjustable optical attenuator, including outer envelope 1, insulating base 2, fiber collimator and light detector 3, insulating base 2 fixes in the one end of outer envelope 1, has the guide fiber hole on the other end of outer envelope 1, and is preferred, and the guide fiber is downthehole to be filled through glue or metallic solder and is sealed.

The optical fiber collimator and the optical detector 3 are sequentially arranged inside the outer sealing tube 1, and the optical detector 3 is fixed on the end face of the inner side of the insulating base 2; the optical fiber collimator sequentially comprises a double-core optical fiber head 4, a light blocking chip 5 and a self-focusing lens 6, wherein the double-core optical fiber head 4 is at least provided with an input optical fiber and an output optical fiber, one end of the self-focusing lens 6 facing to the optical detector 3 is provided with an optical splitting device 7, and the optical detector 3 is used for receiving light transmitted from the optical splitting device 7 and converting photoelectric signals of the light; the optical fiber collimator is fixedly connected with the insulating base 2 through a structural part 8, and the structural part 8 is arranged inside the outer sealing tube 1.

Two first pin pins 9 and two second pin pins 10 are fixedly connected to the outer end face of the insulating base 2. The two pad pins of the optical detector 3 can be connected and conducted with the two first pin pins 9 through conductive adhesive and gold wires; the two pad pins of the light blocking chip 5 can be connected and conducted with the two second pin pins 10 through a traditional enameled wire, a gold wire or a flexible circuit board.

The utility model discloses in, two core optical fiber head 4 orientation is wedge angle face towards the terminal surface of the formula chip 5 that is in the light and the terminal surface of the formula chip 5 that is in the light of self-focusing lens 6 orientation to anti-reflection rete has been plated respectively. The light blocking chip 5 is a chip with an electrically driven blocking piece generating displacement. The beam splitter 7 is directly coated as a film on the end face of the self-focusing lens 6 facing the light detector 3.

Example 1

As shown in fig. 2, the dual-core optical fiber head 4, the light-blocking chip 5 and the self-focusing lens 6 are sequentially and fixedly connected by end face gluing. The structural member 8 is a positioning groove on the inner end face of the insulating base 2, and the self-focusing lens 6 is fixed in the positioning groove in an adhesive mode, so that the optical fiber collimator and the insulating base 2 are connected and fixed.

Example 2

As shown in fig. 3, the dual-core optical fiber head 4, the light-blocking chip 5 and the self-focusing lens 6 are sequentially and fixedly connected by end face gluing. The structural part 8 is a connecting pipe which can be a glass pipe or a metal pipe, the self-focusing lens 6 is fixedly sleeved in one end of the connecting pipe in an adhesive mode, and the other end of the connecting pipe is fixedly adhered to the inner end face of the insulating base 2, so that the optical fiber collimator is fixedly connected with the insulating base 2.

Example 3

As shown in fig. 4, the dual-core optical fiber head 4, the light-blocking chip 5 and the self-focusing lens 6 are sequentially fixed in a sleeve by adhesive sleeve, the sleeve may be a glass tube or a metal tube, and a through hole through which a conductive material passes is formed on the wall of the sleeve. The structural member 8 is a positioning groove on the inner end face of the insulating base 2, and the self-focusing lens 6 is fixed in the positioning groove in an adhesive mode, so that the optical fiber collimator and the insulating base 2 are connected and fixed.

Example 4

As shown in fig. 5, the dual-core optical fiber head 4, the light-blocking chip 5 and the self-focusing lens 6 are sequentially and fixedly connected by end face gluing. 8 positioning seats of the structural member, the positioning seats are fixed in the outer sealing tube 1 in an adhesive manner, the double-core optical fiber head 4 is fixed on the positioning seats in an adhesive manner, two second pin pins 10 respectively penetrate through corresponding guide holes in the insulating base 2 and are fixedly connected with the positioning seats, and glue or metal solder is filled in the guide holes for sealing, so that the optical fiber collimator is fixedly connected with the insulating base 2.

The practice of the present invention has been described with reference to the accompanying drawings, but the invention is not limited to the embodiments described above, which are illustrative rather than limiting, and it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A high-reliability adjustable optical attenuator integrating TAP-PD comprises an outer sealing tube, an insulating base, an optical fiber collimator and an optical detector, wherein the insulating base is fixed at one end of the outer sealing tube, and the other end of the outer sealing tube is provided with a fiber guide hole; the optical fiber collimator and the optical detector are sequentially arranged in the outer sealing tube, and the optical detector is fixed on the end face of the inner side of the insulating base; the optical fiber collimator sequentially comprises a double-core optical fiber head, a light blocking type chip and a self-focusing lens, wherein the double-core optical fiber head is at least provided with an input optical fiber and an output optical fiber, one end of the self-focusing lens, which faces to the optical detector, is provided with a light splitting device, and the optical detector is used for receiving light transmitted by the light splitting device and converting photoelectric signals of the light; two first pin feet and two second pin feet are fixedly connected to the outer end face of the insulating base, the two first pin feet are respectively connected and conducted with two pad feet of the optical detector, and the two second pin feet are respectively connected and conducted with two pad feet of the light blocking type chip; the method is characterized in that: the optical fiber collimator is fixedly connected with the insulating base through a structural member, and the structural member is arranged inside the outer sealing pipe.

2. The variable optical attenuator of high reliability integrated TAP-PD according to claim 1, wherein: the end face of the double-core optical fiber head facing the light blocking chip and the end face of the self-focusing lens facing the light blocking chip are both wedge-angle surfaces and are respectively plated with an antireflection film layer.

3. The variable optical attenuator of high reliability integrated TAP-PD according to claim 1, wherein: the light blocking chip is electrically driven by the blocking piece to generate displacement.

4. The variable optical attenuator of high reliability integrated TAP-PD according to claim 1, wherein: the light splitting device is directly plated on the end face of the self-focusing lens facing the optical detector as a film layer.

5. The variable optical attenuator of high reliability integrated TAP-PD according to claim 1, wherein: the double-core optical fiber head, the light blocking chip and the self-focusing lens are fixedly connected in sequence through end face gluing.

6. The variable optical attenuator of high reliability integrated TAP-PD according to claim 1, wherein: the double-core optical fiber head, the light blocking chip and the self-focusing lens are sequentially fixed in a sleeve through adhesive sleeve joint.

7. The tunable optical attenuator of a high reliability integrated TAP-PD of claim 5 or 6, wherein: the structural member is a positioning groove on the inner end face of the insulating base, and the self-focusing lens is fixed in the positioning groove in an adhesive mode.

8. The variable optical attenuator of high reliability integrated TAP-PD of claim 5, wherein: the structural part is a connecting pipe, the self-focusing lens is glued and fixedly sleeved in one end of the connecting pipe, and the other end of the connecting pipe is glued and fixed with the inner end face of the insulating base.

9. The variable optical attenuator of high reliability integrated TAP-PD of claim 5, wherein: the structural member is a positioning seat, the positioning seat is fixedly adhered in the outer sealing tube, the double-core optical fiber head is fixedly adhered on the positioning seat, the two second PIN feet respectively penetrate through corresponding guide holes in the insulating base and are fixedly connected with the positioning seat, and the guide holes are filled and sealed with glue or metal solder.

10. The variable optical attenuator of high reliability integrated TAP-PD according to claim 1, wherein: and the fiber guide holes are filled and sealed by glue or metal solder.