Automatic optical power measuring device

Abstract

According to the optical power automatic measuring device provided by the invention, the beam splitter is arranged behind the optical fiber insertion interface, and the light source transmitted from the optical fiber insertion interface is separated by the beam splitter based on the optical wavelength, so that the sub-light sources with different wavelengths are obtained, and then the optical power of the sub-light sources with different wavelengths is measured by the detector. The light sources with different wavelengths and the corresponding optical power are displayed at the same time through the displayer, manual switching is not needed when the optical power of the light with different wavelengths needs to be measured, automatic and simultaneous measurement of the optical power of the light with different wavelengths is achieved, and the optical power measurement efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of optical power detection, and in particular to an automatic optical power measurement device. Background Art

[0002] Optical fiber communication has been widely used in various fields. With the development of PON (Passive Optical Network) optical communication technology, different optical fiber access methods have appeared on the market to meet different technical requirements. For example, FTTH (Fibre (Fiber) To The Home) and FTTR (Fibre (Fiber) To The Room) are currently supported. Among them, FTTH refers to the installation of optical network units at home users or corporate users, and FTTR refers to the laying of optical fibers to remote nodes.

[0003] In order to ensure the stability and reliability of optical fiber communication, it is usually necessary to adjust the optical power, and the basis for adjusting the optical power is to accurately measure the optical power. With the increase in optical fiber access methods, the number of optical fiber interfaces has also gradually increased. Therefore, it is very important to measure the optical power of light transmitted by different optical fiber interfaces. The light transmitted by different optical fiber interfaces may have different wavelengths. Therefore, how to measure the optical power of light with different wavelengths has become an important issue.

[0004] In the related art, the optical power of optical signals transmitted by different optical fibers is usually measured by an optical power meter. When using an optical power meter to measure the power of different optical fibers, it is usually necessary to manually switch the measurement frequency of the optical power meter to achieve the optical power measurement of different frequency lights. This method is very time-consuming and labor-intensive, resulting in low optical power measurement efficiency. Utility Model Content

[0005] In view of this, an embodiment of the present application provides an automatic optical power measurement device to automatically measure the optical power of lights of different wavelengths, thereby improving the optical power measurement efficiency.

[0006] According to one aspect of the present application, there is provided an automatic optical power measurement device, the device comprising: an optical fiber insertion interface, a beam splitter, a detector, and a display;

[0007] The optical fiber insertion interface is used to receive a light source input by an optical fiber;

[0008] The beam splitter is used to split the light source into sub-light sources with different wavelengths, and send the sub-light sources with different wavelengths to the detector;

[0009] The detector is used to calculate the optical power of the sub-light sources of different wavelengths, and send the optical power corresponding to the sub-light sources of different wavelengths to the display;

[0010] The display is used to display the optical powers corresponding to the sub-light sources of different wavelengths.

[0011] In a possible embodiment, a thin film of preset thickness is coated on the surface of the beam splitter.

[0012] In a possible embodiment, the beam splitter is a cubic beam splitter, which includes two right-angle prisms, and a thin film of a preset thickness is coated on the inclined surface of any of the right-angle prisms.

[0013] In a possible embodiment, the light source is incident on the cube beam splitter at an incident angle of 0°.

[0014] In a possible embodiment, there are a plurality of cubic beam splitters, thin films of different thicknesses are coated on the plurality of cubic beam splitters, and the cubic beam splitters are connected in parallel.

[0015] In a possible embodiment, the detector is used to measure the optical power of light within a preset wavelength range.

[0016] In a possible embodiment, there are multiple detectors, and the multiple detectors are used to measure the optical power of light within different wavelength ranges.

[0017] In a possible embodiment, the detector is used to send the optical power corresponding to the sub-light sources of different wavelengths to the display in the form of an electrical signal; the electrical signal is a current signal or a voltage signal;

[0018] The device further comprises: an amplifier, which is used to amplify the electrical signal output by the detector and send the amplified electrical signal to the display.

[0019] In a possible embodiment, the display is used to display the optical powers corresponding to the sub-light sources of different wavelengths through an analog signal or a digital signal.

[0020] According to another aspect of the present application, an optical power meter is provided, comprising the structure of any of the above-mentioned automatic optical power measurement devices.

[0021] One or more technical solutions provided in the embodiments of the present application are provided with a beam splitter after the optical fiber is inserted into the interface, and the light source transmitted through the optical fiber insertion interface is separated by the beam splitter based on the light wavelength, thereby obtaining sub-light sources of different wavelengths, and then the optical power of the sub-light sources of different wavelengths is measured by a detector, and the light sources of different wavelengths and the corresponding optical power are simultaneously displayed on a display. When it is necessary to measure the optical power of light of different wavelengths, there is no need for manual switching, and automatic and simultaneous measurement of the optical power of light of different wavelengths is achieved, thereby improving the efficiency of optical power measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Further details, features and advantages of the present application are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of the structure of an automatic optical power measurement device provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a stereo beam splitter in the optical power automatic measurement device provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of another structure of the automatic optical power measurement device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0027] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0028] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0029] The names of the messages or information exchanged between multiple devices in the embodiments of the present application are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0030] In order to achieve simultaneous measurement of the optical power of light of different wavelengths, thereby improving the optical power measurement efficiency, an embodiment of the present application provides an automatic optical power measurement device. The automatic optical power measurement device is an external independent device. Specifically, an optical fiber can be connected to the automatic optical power measurement device, and the automatic optical power measurement device measures the optical power in the optical fiber. The scheme of the present application is described below with reference to the accompanying drawings:

[0031] Figure 1 A schematic diagram of the structure of an optical power measurement device provided in an embodiment of the present application, the device 100 may include: an optical fiber insertion interface 101, a beam splitter 102, a detector 103 and a display 104;

[0032] The optical fiber insertion interface 101 is used to receive the light source input by the optical fiber;

[0033] The beam splitter 102 is used to split the light source into sub-light sources with different wavelengths, and send the sub-light sources with different wavelengths to the detector;

[0034] The detector 103 is used to calculate the optical power of the sub-light sources of different wavelengths and send the optical power corresponding to the sub-light sources of different wavelengths to the display;

[0035] The display 104 is used to display the optical powers corresponding to the sub-light sources of different wavelengths.

[0036] By applying the embodiments of the present application, a beam splitter is set after the optical fiber is inserted into the interface, and the light source transmitted through the optical fiber insertion interface is separated based on the light wavelength by the beam splitter, thereby obtaining sub-light sources of different wavelengths. The optical power of the sub-light sources of different wavelengths is then measured by a detector, and the light sources of different wavelengths and the corresponding optical powers are simultaneously displayed on a display. When it is necessary to measure the optical power of light of different wavelengths, there is no need for manual switching, and automatic and simultaneous measurement of the optical power of light of different wavelengths is achieved, thereby improving the efficiency of optical power measurement.

[0037] The optical power automatic measuring device provided in the embodiment of the present application can be of any size, can be a handheld form, or can be a device placed in a fixed position. The optical power automatic measuring device includes at least one optical fiber insertion interface, which can be a common SC (Square Connector) interface in the PON network, or an FC (Ferrule Connector), ST (Stab & Twist, insert rotary connector), etc. The specific type and number of the optical fiber insertion interface can be flexibly selected according to the actual business scenario, and the embodiment of the present application does not specifically limit this.

[0038] After the optical fiber is inserted into the interface, a beam splitter is provided. The beam splitter is a coated glass, that is, one or more layers of thin film are coated on the surface of the optical glass, and the thin film can be a nitrocellulose film. The beam splitter has the same transmittance / reflectivity ratio for light within a certain wavelength range. Therefore, in order to ensure the beam splitting effect of the beam splitter, the surface of the beam splitter used in the embodiment of the present application is coated with a thin film of preset thickness. The thickness of the thin film can be determined according to the specific application scenario of the optical power automatic measurement device provided in the embodiment of the present application. For example, the coating thickness can be set for the PON light wavelength range, or the coating thickness can be set for the LED light wavelength range.

[0039] By using a beam splitter to refract and transmit light, the light can be divided into two or more beams. Light of different wavelengths has different refractive indices on the same medium. Therefore, by refracting and transmitting the light source transmitted from the optical fiber insertion interface through the beam splitter, light of different wavelengths can be separated. For the sake of ease of description, in the embodiments of the present application, the transmitted light obtained by splitting the light source through the beam splitter is referred to as a sub-light source.

[0040] In a possible embodiment, the beam splitter may be a cubic beam splitter, which includes two right-angle prisms, and a thin film of a preset thickness is coated on the inclined surface of any of the right-angle prisms. Figure 2 As shown, Figure 2 A schematic diagram of the structure of a cubic beam splitter provided in an embodiment of the present application. The cubic beam splitter is a glued cube formed by coating a film layer on the inclined surface of a 45° right-angle prism and then gluing a prism of the same shape with optical glue. The cubic beam splitter is coated with an anti-reflection film around it to reduce the attenuation of the light signal. Figure 2 As shown, the gluing method is to glue the inclined surfaces of the two right-angle prisms. The above optical glue can be selected and used according to the actual application scenario. For example, the optical glue is easy to fail in high-power scenarios. Therefore, in high-power application scenarios, optical glue may not be used.

[0041] In a possible embodiment, the light source sent from the optical fiber insertion interface to the cube beam splitter is incident from the 0° incident angle of the cube beam splitter, such as Figure 2 As shown in the figure, the incident light is incident from the 0° incident angle of the cube beam splitter, and the reflected light is perpendicular to the incident light and perpendicular to the surface of the cube beam splitter. In this way, the transmitted light and the optical axis of the cube beam splitter are on the same straight line, and the reflected light is deflected by 90°, which can basically eliminate the deviation of the transmitted light and reduce ghosting together with the incident and exit surfaces coated with anti-reflection coatings.

[0042] In a possible embodiment, there may be a plurality of the above-mentioned cubic beam splitters, and the beam splitting films in the plurality of cubic beam splitters have different thicknesses, thereby being able to separate light sources of different wavelengths in more wavelength ranges. The plurality of cubic beam splitters may be connected in parallel, that is, the optical fiber insertion interface may simultaneously send the light source to the plurality of cubic beam splitters.

[0043] In the embodiment of the present application, a cube beam splitter can simultaneously output multiple groups of optical signal information for mixed input light sources, such as 1310nm and 1490nm wavelength inputs. The two groups of optical signals can be decomposed at the same time through back-end circuit analysis and amplification, and the display can also display the information of the two groups of optical signals at the same time without manual switching. And by adding multiple cube beam splitters, multiple mixed light source inputs with different wavelengths can be added to achieve multiple groups of optical signal information output, such as adding 1270nm and 1577nm wavelength inputs, so as to superimpose and complete the optical signal separation output with different needs.

[0044] The sub-light source output by the beam splitter is input to the detector for processing, and the detector can convert the received light signal into an electrical signal and calculate the power of the light signal. The detector can be a component such as a photodiode that can convert light signals into electrical signals.

[0045] Taking photodiodes as an example, photodiodes of different materials usually have good response performance and measurement accuracy within a certain wavelength range. Therefore, the material of the photodiode used in the embodiment of the present application can be determined according to the specific application scenario and used to measure the optical power of light within a preset wavelength range. Specifically, the material of the photodiode can be determined according to the wavelength range that needs to be measured using the optical power automatic measurement device. Exemplarily, the detector can be an avalanche photodiode of silicon material, a photodiode of indium gallium arsenide (InGaAs), gallium phosphide (GaP) or germanium (Ge) material, and the like.

[0046] In a possible embodiment, in order to meet the optical power measurement requirements of different wavelength ranges, the above-mentioned optical power automatic measurement device may include multiple detectors, each detector is used to measure the optical power of light in a different wavelength range, that is, each detector has a better use effect in a different wavelength range. Exemplarily, the detector type and material can be selected for the PON light wavelength range, so that the detector has a better use effect in the PON light wavelength range, wherein the PON light wavelength range can be selected according to actual needs, but the wavelength range must include the PON working wavelength, and the PON light working wavelength includes 1310nm, 1490nm, 1550nm, etc. The detector type and material are selected for LED light, so that the detector has a better use effect in the LED light wavelength range, wherein the LED light wavelength range can be selected according to actual needs, and can be ultraviolet light wavelength to infrared light wavelength.

[0047] The above-mentioned multiple detectors can be connected in parallel, that is, the beam splitter can send the sub-light source to any detector, or to multiple detectors.

[0048] The detector can send an electrical signal to a display for display, and the electrical signal can be a voltage or current value of the optical power corresponding to different wavelengths. In a possible embodiment, a conversion relationship between optical power and voltage or optical power and current signal can be preset. After calculating the optical power for the sub-light source, the detector can determine the voltage or current value corresponding to the optical power based on the conversion relationship and output it to the display.

[0049] In a possible embodiment, the wavelength that the detector can measure can be preset. After the detector detects the sub-light source of the corresponding wavelength and calculates the optical power for the sub-light source, the wavelength matching the sub-light source and the corresponding optical power can be sent to the display in the form of an electrical signal. In a possible embodiment, different channels can be set for different wavelengths, and the detector can send an electrical signal corresponding to the optical power through the channel corresponding to the wavelength of the sub-light source.

[0050] As a possible implementation, the display can display the different wavelengths sent by the detector in correspondence with the optical power. Specifically, the wavelength and optical power can be displayed correspondingly through digital signals or analog signals. For example, "1310nm power 1", "1490nm power 2" can be displayed from top to bottom in the display screen, or the change of optical power with wavelength can be displayed in the form of a waveform on the display screen.

[0051] In one possible embodiment, based on Figure 1 ,like Figure 3As shown, the above-mentioned automatic optical power measurement device may further include an amplifier 304, which can amplify the electrical signal sent by the detector and send the amplified electrical signal to the display to meet the transmission power requirement of the display.

[0052] The amplifier can be a linear amplifier or a nonlinear amplifier, and can be flexibly selected according to the actual application scenario, and this application does not make any specific limitations on this.

[0053] By applying the embodiments of the present application, different wavelength light sources are split by a beam splitter, so that the optical power of lights of different wavelengths can be automatically measured, reducing the manpower cost. The required multiple optical power signal information can be displayed without manual switching.

[0054] Furthermore, in the related art, different optical power measurement devices are required for different application scenarios, and different optical power measurement devices are required for XGPON (10-Gigabit-capable Passive Optical Network) and GPON (Gigabit-capable Passive Optical Network) light, respectively. By applying the embodiments of the present application, it is possible to achieve simultaneous measurement of the optical power of these two types of light, and the light sources of two devices can be mixed and input at the same time on one interface and the corresponding information can be displayed on one display, thereby reducing the cost of the equipment.

[0055] At present, the development of PON optical communication is still growing rapidly. If products with different light source wavelengths appear, they can be adapted to light source inputs of different wavelengths by adding cubic beam splitters. This is relatively simple to implement and has good compatibility and scalability.

[0056] In addition, the propagation speed of light in the same medium is the same, and wavelength = wave speed / frequency, so the frequencies of light of different wavelengths are also different. Accordingly, the embodiment of the present application can also measure the optical power of light of different frequencies at the same time. The process of measuring the optical power of light of different frequencies is the same as that of measuring the optical power of light of different wavelengths, which will not be repeated here.

[0057] An exemplary embodiment of the present application further provides an optical power meter, which includes the structure of any of the above-mentioned automatic optical power measurement devices.

Claims

1. An automatic optical power measurement device, characterized in that: The device comprises: an optical fiber insertion interface, a beam splitter, a detector and a display; The optical fiber insertion interface is used to receive a light source input by an optical fiber; The beam splitter is used to split the light source into sub-light sources with different wavelengths, and send the sub-light sources with different wavelengths to the detector; The detector is used to calculate the optical power of the sub-light sources of different wavelengths, and send the optical power corresponding to the sub-light sources of different wavelengths to the display; The display is used to display the optical powers corresponding to the sub-light sources of different wavelengths.

2. The device according to claim 1, characterized in that The surface of the beam splitter is coated with a thin film of preset thickness.

3. The device according to claim 1, characterized in that The beam splitter is a cubic beam splitter, which includes two right-angle prisms, and a thin film with a preset thickness is plated on the inclined surface of any of the right-angle prisms.

4. The device according to claim 3, characterized in that The light source is incident from the cube beam splitter at an incident angle of 0°.

5. The device according to claim 3, characterized in that There are a plurality of cubic beam splitters, and thin films of different thicknesses are plated on the plurality of cubic beam splitters, and the cubic beam splitters are connected in parallel.

6. The device according to claim 1, characterized in that The detector is used to measure the optical power of light within a preset wavelength range.

7. The device according to claim 1, characterized in that There are multiple detectors, and the multiple detectors are used to measure the optical power of light in different wavelength ranges.

8. The device according to claim 1, characterized in that The detector is used to send the optical power corresponding to the sub-light sources of different wavelengths to the display in the form of an electrical signal; the electrical signal is a current signal or a voltage signal; The device further comprises: an amplifier, which is used to amplify the electrical signal output by the detector and send the amplified electrical signal to the display.

9. The device according to claim 1, characterized in that The display is used to display the optical powers corresponding to the sub-light sources of different wavelengths through analog signals or digital signals.

10. An optical power meter, characterized in that: The invention comprises the structure of the automatic optical power measuring device as described in any one of claims 1 to 9.

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