阅读说明：本技术 一种可以增强光吸收的光探测器 (Photodetector capable of enhancing light absorption ) 是由 顾昌锋 彭应全 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种可以增强光吸收的光探测器,包括吸收直管,其特征在于,所述吸收直管呈圆筒状设置,所述吸收直管的一端固定连接有进光管,所述进光管的内部环形侧壁上固定连接有第一透明镜,所述第一透明镜位于进光管的开口较大的一端,所述进光管内部固定连接有光隔离器,所述吸收直管的环形内圈侧壁上固定连接有第一凹面镜和第二凹面镜,所述第一凹面镜与第二凹面镜均为一面呈平面光滑设置一面呈内凹设置,所述第一凹面镜与第二凹面镜呈相互对称设置,所述第一凹面镜与第二凹面镜之间设有谐振腔。本发明设计合理,构思巧妙,通过光的谐振大大增加了光探测器对光的吸收率,提高了探测器响应速度。(The invention discloses an optical detector capable of enhancing light absorption, which comprises an absorption straight pipe and is characterized in that the absorption straight pipe is arranged in a cylindrical shape, one end of the absorption straight pipe is fixedly connected with a light inlet pipe, a first transparent mirror is fixedly connected to the inner annular side wall of the light inlet pipe, the first transparent mirror is positioned at one end of the light inlet pipe with a larger opening, an optical isolator is fixedly connected to the inside of the light inlet pipe, a first concave mirror and a second concave mirror are fixedly connected to the inner annular side wall of the absorption straight pipe, the first concave mirror and the second concave mirror are both smoothly arranged on the same plane and are arranged in an inwards concave manner, the first concave mirror and the second concave mirror are symmetrically arranged, and a resonant cavity is arranged between the first concave mirror and the second concave mirror. The invention has reasonable design and ingenious conception, greatly increases the light absorption rate of the optical detector through the light resonance, and improves the response speed of the detector.)

1. The utility model provides a can strengthen light absorption's light detector, includes absorption straight tube (4), its characterized in that, absorption straight tube (4) are cylindric setting, the one end fixedly connected with of absorption straight tube (4) advances fluorescent tube (3), fixedly connected with first transparent mirror (1) on the inside annular lateral wall of advancing fluorescent tube (3), first transparent mirror (1) is located the great one end of opening of advancing fluorescent tube (3), advance fluorescent tube (3) inside fixedly connected with optical isolator (2), first concave mirror (6) and second concave mirror (7) of fixedly connected with on the annular inner circle lateral wall of absorption straight tube (2), first concave mirror (6) and second concave mirror (7) are the one side and are the smooth setting of plane and personally submit the indent setting, first concave mirror (6) are mutual symmetry setting with second concave mirror (7), a resonant cavity (9) is arranged between the first concave mirror (6) and the second concave mirror (7), a second transparent mirror (8) is fixedly connected to the side wall of the annular inner ring of the absorption straight pipe (4), and a photoelectric conversion device is arranged inside one end, deviating from the light inlet pipe (3), of the absorption straight pipe (4).

2. The photodetector as claimed in claim 1, wherein the photoelectric conversion device comprises a substrate (10), a first electrode (11) is disposed on a sidewall of the substrate (10), a light absorption layer (12) is disposed on a side of the first electrode (11) away from the substrate (10), a second electrode (13) is disposed on a side of the light absorption layer (12) away from the first electrode (11), and the substrate (10), the first electrode (11), the light absorption layer (12) and the second electrode (13) are horizontally disposed on the second transparent mirror (8).

3. A photodetector according to claim 2, characterised in that the substrate (10) is an InP-based material, and the thickness of the substrate (10) is five to fifty nanometres.

4. A photodetector according to claim 2, characterized in that the first electrode (11) is made of Ag, and the thickness of the first electrode (11) is five to fifty nanometers.

5. A photodetector according to claim 2, characterized in that the light absorbing layer (12) is CH (NH)₂)₂PbI₃A material, the light absorbing layer (12) having a thickness of fifty to one hundred nanometers.

6. A photodetector according to claim 2, characterized in that the second electrode (13) is made of Cu, and the thickness of the first electrode (11) is five to fifty nanometers.

7. An optical detector according to claim 1, characterized in that an isolation metal mesh layer (5) is fixedly connected to the outer side of the absorption straight tube (4), and the isolation metal mesh layer (5) is cylindrically disposed.

8. A photodetector with enhanced light absorption according to claim 1, characterized in that the first transparent mirror (1) and the second transparent mirror (8) are each arranged as a convex lens.

9. A photodetector according to claim 1, characterized in that the interior of the resonator (9) is evacuated.

10. A photodetector with enhanced light absorption as claimed in claim 1, characterized in that the area of the inner diameter of the light inlet pipe (3) is larger than the area of the inner diameter of the light inlet pipe (4).

Technical Field

The invention relates to the technical field of optical detectors, in particular to an optical detector capable of enhancing light absorption.

Background

The optical detector, also called "optical detector", is the first part of the optical receiver, and the optical detector is an important part of the optical fiber sensor, and its performance index will directly affect the performance of the sensor. The optical power incident on the surface thereof can be detected and the change in this optical power converted into a corresponding current. The performance requirements of optical detectors are high due to the loss and distortion of the optical signal in the optical fiber. The most important requirements are higher sensitivity, less noise in the wavelength range of the light source used, and fast response speed and adaptive transmission rate.

A larger light absorption is required for the photodetector, because more carriers can be generated only by increasing the light absorption, but the problems of lower light absorption rate and slower response speed of the photodetector still exist in the prior art.

Disclosure of Invention

The invention provides a photodetector capable of enhancing light absorption, which aims to solve the problems that the photodetector needs larger light absorption in the background art, and more carriers can be generated only by enhancing the light absorption, but the photodetector still has lower light absorption rate and slower response speed of the detector in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a light detector capable of enhancing light absorption comprises an absorption straight pipe and is characterized in that the absorption straight pipe is cylindrically arranged, one end of the absorption straight pipe is fixedly connected with a light inlet pipe, a first transparent mirror is fixedly connected on the inner annular side wall of the light inlet pipe and is positioned at one end of the light inlet pipe with a larger opening, an optical isolator is fixedly connected inside the light inlet pipe, a first concave mirror and a second concave mirror are fixedly connected on the annular inner ring side wall of the absorption straight pipe, the first concave mirror and the second concave mirror are both smoothly arranged on a plane and are arranged inwards, the first concave mirror and the second concave mirror are symmetrically arranged, a resonant cavity is arranged between the first concave mirror and the second concave mirror, and a second transparent mirror is fixedly connected on the annular inner ring side wall of the absorption straight pipe, and a photoelectric conversion device is arranged in one end of the absorption straight pipe, which is far away from the light inlet pipe.

As a further improvement scheme of the technical scheme: the photoelectric conversion device comprises a substrate, a first electrode is arranged on the side wall of the substrate, a light absorption layer is arranged on one side, away from the substrate, of the first electrode, a second electrode is arranged on one side, away from the first electrode, of the light absorption layer, and the substrate, the first electrode, the light absorption layer and the second electrode are all located on the second transparent mirror and are arranged horizontally.

As a further improvement scheme of the technical scheme: the substrate is made of InP base materials, and the thickness of the substrate is five to fifty nanometers.

As a further improvement scheme of the technical scheme: the first electrode is made of Ag, and the thickness of the first electrode is five to fifty nanometers.

As a further improvement scheme of the technical scheme: the light absorption layer adopts CH (NH)₂)₂PbI₃And (3) manufacturing a material, wherein the thickness of the light absorption layer is fifty to one hundred nanometers.

As a further improvement scheme of the technical scheme: the second electrode is made of Cu, and the thickness of the first electrode is five to fifty nanometers.

As a further improvement scheme of the technical scheme: the outer side of the absorption straight pipe is fixedly connected with an isolation metal mesh layer, and the isolation metal mesh layer is arranged in a cylindrical shape.

As a further improvement scheme of the technical scheme: the first transparent mirror and the second transparent mirror are both arranged in a convex lens mode.

As a further improvement scheme of the technical scheme: the interior of the resonant cavity is arranged in vacuum.

As a further improvement scheme of the technical scheme: the inner diameter area of the light inlet pipe is larger than that of the light inlet pipe.

Compared with the prior art, the invention has the beneficial effects that:

the inner diameter area of the light inlet tube is larger than that of the light inlet tube, so that more light rays can be contacted with the first transparent mirror, an external light source can enter the light inlet tube through the first transparent mirror, the external light rays pass through the first transparent mirror and then become parallel light rays, then pass through the optical isolator, the optical isolator only allows the light to be transmitted from the first transparent mirror to the first concave mirror in a single direction, the light rays can enter the resonant cavity between the first concave mirror and the second concave mirror after reaching the first concave mirror, the cambered surface reflectivity of the first concave mirror is percent reflectivity, the cambered surface reflectivity of the second concave mirror is part reflectivity, and through setting the distance between the first concave mirror and the second concave mirror, when the optical path difference generated by one circle of light transmitted in the resonant cavity is integral multiple of the wavelength, the light waves can be interfered with the light waves newly entering the resonant cavity to form resonance, and then improve the feedback energy of light, last light can penetrate the second concave mirror through a plurality of reflections and directly penetrate into the second transparent mirror, the second transparent mirror focuses on light to photosensitive material's light absorption layer again, through the absorptive intensity of reinforcing light absorption layer, and then improve the speed that the light signal conversion is the signal of telecommunication, the device reasonable in design, think about ingeniously, through the resonance greatly increased optical detector absorption rate to the light of light, detector response speed has been improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to be implemented according to the content of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to a lesser extent. In the drawings:

FIG. 1 is a schematic diagram of a front cross-sectional structure of a photodetector capable of enhancing light absorption according to the present invention;

fig. 2 is a schematic perspective view of a light detector capable of enhancing light absorption according to the present invention;

FIG. 3 is a schematic view of a three-dimensional structure of an isolation metal mesh in a photodetector capable of enhancing light absorption according to the present invention;

fig. 4 is a schematic structural diagram of a photoelectric conversion device in a photodetector capable of enhancing light absorption according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1 a first transparent mirror, 2 an optical isolator, 3 a light inlet tube, 4 an absorption straight tube, 5 an isolation metal mesh layer, 6 a first concave mirror, 7 a second concave mirror, 8 a second transparent mirror, 9 a resonant cavity, 10 a substrate, 11 a first electrode, 12 a light absorption layer and 13 a second electrode.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is more particularly described in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, in an embodiment of the present invention, an optical detector capable of enhancing light absorption includes an absorption straight tube 4, the absorption straight tube 4 is disposed in a cylindrical shape, one end of the absorption straight tube 4 is fixedly connected with a light inlet tube 3, a first transparent mirror 1 is fixedly connected to an inner annular sidewall of the light inlet tube 3, the first transparent mirror 1 is located at one end of the light inlet tube 3 with a larger opening, an optical isolator 2 is fixedly connected to the inside of the light inlet tube 3, a first concave mirror 6 and a second concave mirror 7 are fixedly connected to an inner annular sidewall of the absorption straight tube 2, the first concave mirror 6 and the second concave mirror 7 are both disposed in a plane and are disposed in a concave manner, the first concave mirror 6 and the second concave mirror 7 are disposed in a symmetrical manner, a resonant cavity 9 is disposed between the first concave mirror 6 and the second concave mirror 7, a second transparent mirror 8 is fixedly connected to an inner annular sidewall of the absorption straight tube 4, and a photoelectric conversion device is arranged in one end of the absorption straight tube 4, which is away from the light inlet tube 3.

Referring to fig. 1 and 4, the photoelectric conversion device includes a substrate 10, a first electrode 11 is disposed on a sidewall of the substrate 10, a light absorption layer 12 is disposed on a side of the first electrode 11 away from the substrate 10, a second electrode 13 is disposed on a side of the light absorption layer 12 away from the first electrode 11, and the substrate 10, the first electrode 11, the light absorption layer 12 and the second electrode 13 are disposed horizontally on the second transparent mirror 8.

Referring to fig. 4, the substrate 10 is an InP-based material, and the thickness of the substrate 10 is five to fifty nanometers.

Referring to fig. 4, the first electrode 11 is made of Ag, and the thickness of the first electrode 11 is five to fifty nanometers.

Referring to FIG. 4, the light absorption layer 12 is CH (NH)₂)₂PbI₃The light absorbing layer 12 is made of a material having a thickness of fifty to one hundred nanometers.

Referring to fig. 4, the second electrode 13 is made of Cu, and the thickness of the first electrode 11 is five to fifty nanometers.

Referring to fig. 1 and 3, an isolation metal mesh layer 5 is fixedly connected to an outer side of the absorption straight tube 4, the isolation metal mesh layer 5 is disposed in a cylindrical shape, and the cylindrical isolation metal mesh layer 5 can shield a magnetic field generated inside the absorption straight tube 4, thereby preventing a zeeman effect from being generated by light rays inside the absorption straight tube 4, and avoiding a phenomenon that a spectrum line is split in the magnetic field.

Referring to fig. 1, the first transparent mirror 1 and the second transparent mirror 8 are both convex lenses.

Referring to fig. 1, the inside of the resonant cavity 9 is vacuum, and the vacuum prevents the dust in the resonant cavity 9 from scattering light, thereby further improving the reflection intensity of light in the resonant cavity 9.

Referring to fig. 1, the inner diameter area of the light inlet pipe 3 is larger than that of the light inlet pipe 4, so that more light is in contact with the first transparent mirror 1.

The working principle of the invention is as follows:

the inner diameter area of the light inlet tube 3 is larger than that of the light inlet tube 4, so that more light rays can be in contact with the first transparent mirror 1, an external light source can enter the light inlet tube 3 through the first transparent mirror 1, the external light rays pass through the first transparent mirror 1 to become parallel light rays and then pass through the optical isolator 2, the optical isolator 2 only allows the light to be transmitted from the first transparent mirror 1 to the first concave mirror 6 in a single direction, the light rays can enter the resonant cavity 9 between the first concave mirror 6 and the second concave mirror 7 after reaching the first concave mirror 6, the cambered surface reflectivity of the first concave mirror 6 is a percent reflectivity, the cambered surface reflectivity of the second concave mirror 6 is a partial reflectivity, and by setting the distance between the first concave mirror 6 and the second concave mirror 7, when the optical path difference generated by the light transmitting in a circle in the resonant cavity 9 is an integral multiple of the wavelength, the light waves can be longer in interference with the light waves newly entering the resonant cavity, resonance is formed, so that the feedback energy of light is improved, finally, the light can be transmitted through the second concave mirror 7 through a plurality of reflections and directly enters the second transparent mirror 8, the second transparent mirror 8 focuses the light on the light absorption layer 12 made of photosensitive materials, and the speed of converting the optical signals into electric signals is improved by enhancing the intensity of the light absorbed by the light absorption layer 12.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.