A rapid testing device and method for optical fiber assemblies

Abstract

This invention relates to the field of optical fiber testing technology. This application provides a rapid testing device for optical fiber components, comprising: a main chassis; a light source output module disposed within the main chassis for outputting a test signal with a target wavelength in response to a wavelength switching command; an optical power detection module disposed within the main chassis for receiving optical signals and converting them into corresponding electrical signals; a central control unit electrically connected to the light source output module and the optical power detection module respectively; a data acquisition and processing module; and a display driving module that, based on the comparison results, drives the display module to indicate "qualified" or "unqualified" states with different colors. This invention integrates insertion loss, return loss, and optical power testing functions into one unit. Through a wavelength linkage module, when the user switches the light source wavelength, the central control unit automatically and synchronously calibrates the wavelength of the optical power detection module, avoiding the tedious manual setting operation and eliminating repeated testing caused by wavelength mismatch.

Description

Technical Field

[0001] This invention relates to the field of optical fiber testing technology, and more specifically, to a rapid testing device and method for optical fiber components. Background Technology

[0002] In fiber optic communication systems, insertion loss (IL) and return loss (RL) of fiber optic components are key performance indicators. Traditional fiber optic component testing methods mainly rely on discrete equipment, such as using a light source and optical power meter to test insertion loss, and using an optical time domain reflectometer or a dedicated return loss meter to test return loss. This step-by-step testing method is cumbersome, requiring frequent insertion, removal, and switching of equipment, resulting in long testing times for single components and making it difficult to meet the high-efficiency testing requirements of mass production.

[0003] While existing integrated testing equipment incorporates multiple functions, it still suffers from significant drawbacks. Firstly, regarding wavelength switching, most devices require operators to manually set the wavelength separately on the light source and power meter. This is not only cumbersome but also prone to measurement errors due to inconsistent parameter settings (wavelength asynchrony). Secondly, the acceptance / failure of test results typically relies on manual reading and comparison with standard thresholds, which can lead to visual fatigue and subjective misjudgments over extended periods. Furthermore, existing equipment usually has fixed test interfaces, making cleaning inconvenient and incompatible with non-standard connectors. Data management also relies on manual recording and lacks intelligent processing.

[0004] Therefore, how to provide a rapid testing method and device for optical fiber components that is easy to operate, highly efficient, accurate, and capable of intelligent data management and result judgment has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid testing device and method for fiber optic components, addressing the aforementioned issues in wavelength switching. Currently, most devices require operators to manually set the wavelength on both the light source and the power meter, which is not only complex but also prone to measurement errors due to inconsistent parameter settings (wavelength asynchrony). Secondly, the acceptance / failure of test results typically relies on manual reading and comparison with standard thresholds, which can lead to visual fatigue and subjective misjudgment over long periods. Furthermore, existing equipment usually has fixed test interfaces, making cleaning inconvenient and incompatible with non-standard connectors. Data management also relies on manual recording, lacking intelligent features.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions: On one hand, embodiments of this application provide a rapid testing device for optical fiber components, including: The main chassis includes a light source output module, which is located inside the main chassis and is used to output a test signal with a target wavelength in response to a wavelength switching command; and an optical power detection module, which is located inside the main chassis and is used to receive optical signals and convert them into corresponding electrical signals. The central control unit is electrically connected to the light source output module and the optical power detection module, respectively. The central control unit includes: a wavelength linkage control module, which, in response to a wavelength switching command, synchronously controls the output wavelength of the light source output module and the calibration wavelength of the optical power detection module; a data acquisition and processing module, which acquires the reference optical power value P0 and the test optical power value P1 acquired by the optical power detection module, and calculates the insertion loss value according to the formula IL = P1 - P0; and acquires the noise floor signal value R0 and the reflected light signal value R1 acquired by the optical power detection module, and calculates the return loss value according to the formula RL = 14.8dB + (R1-R0); a threshold comparison and judgment module, which compares the calculated insertion loss value with a preset insertion loss threshold, or compares the calculated return loss value with a preset return loss threshold, and generates a comparison result; and a display driving module, which drives the display module to indicate the "qualified" or "unqualified" status with different colors according to the comparison result.

[0007] Optionally, the optical interfaces of the light source output module and the optical power detection module are both detachable movable connectors, which support quick replacement of FC, SC, and ST type adapters and φ2.5mm and φ1.25mm ferrules.

[0008] Optionally, the threshold comparison and determination module is specifically configured as follows: When the insertion loss value is less than or equal to the preset upper limit threshold or the return loss value is greater than or equal to the preset lower limit threshold, it is considered qualified; when the insertion loss value is greater than or equal to the preset upper limit threshold or the return loss value is less than or equal to the preset lower limit threshold, it is considered unqualified; the display driving module drives the color display screen to display the qualified result in green and the unqualified result in red.

[0009] Optionally, it also includes a USB data communication module and a foot switch interface connected to the central control unit; in response to the foot switch trigger signal, the central control unit automatically uploads the insertion loss value, return loss value, test wavelength and timestamp data of this test to an external computer through the USB data communication module.

[0010] Optionally, the central control unit further includes a mode control unit, which responds to a mode switching command and configures the device to operate in an integrated insertion and return loss test mode, an independent optical power meter mode, or a dual-wavelength parallel test mode. In the dual-wavelength parallel test mode, the central control unit controls the light source output module to output two optical signals of different wavelengths in sequence, and calculates and displays the insertion loss value and return loss value at the corresponding wavelengths respectively.

[0011] Optionally, the central control unit further includes a preheating determination module; the preheating determination module is used to monitor the output optical power fluctuation of the light source output module in real time after the device is powered on, and when the output optical power fluctuation is less than or equal to ±0.02dB / hour, it determines that the preheating is completed and outputs a ready signal; the display driving module responds to the ready signal and prompts on the display driving module that the test can be performed.

[0012] Optionally, the main chassis is provided with a physical button group, which includes a wavelength switching button, a return loss zeroing button, an insertion loss zeroing button, and a return loss calibration button; the central control unit is configured to: in response to a short press of the return loss zeroing button, perform the acquisition of the noise floor signal value R0; in response to a long press of the return loss calibration button for a duration of 5 seconds, perform the calibration of the standard reflection signal; and in response to a short press of the insertion loss zeroing button, perform the acquisition of the reference optical power value P0.

[0013] Secondly, this embodiment provides a rapid testing method for fiber optic components based on the aforementioned device, including the following steps executed by the central control unit: Step S1. In response to the insertion loss zeroing command, acquire and store the reference optical power value P0 input by the optical power detection module; Step S2: In response to the wavelength switching command, synchronously control the light source output module to switch wavelengths and calibrate the detection wavelength of the optical power detection module; Step S3: In response to the insertion loss test command, acquire and store the test optical power value P1 input by the optical power detection module after passing through the fiber optic component under test; Step S4: Calculate the insertion loss value according to the formula IL = P1 - P0, and output the color code to the display driver module according to the comparison result.

[0014] Optionally, a retracement test step is also included: Step S5: In response to the return loss zeroing command, acquire and store the noise floor signal value R0 input by the optical power detection module; Step S6: In response to the return loss calibration command, calibrate and store the standard reflection signal as a reference value of 14.8dB; Step S7: In response to the return loss test command, acquire and store the reflected light signal value R1 input by the optical power detection module and returned through the fiber optic component under test; Step S8: Calculate the return loss value according to the formula RL = 14.8dB + (R1-R0), and output the color code to the display driver module according to the comparison result.

[0015] Optionally, when the fiber optic assembly under test is a multimode fiber optic assembly, the method further includes a multimode testing step: the central control unit controls the light source output module to switch to the multimode light source wavelength; before performing the insertion loss zeroing operation, the test optical signal is controlled to be output to the test main line, and the test main line is wound with a round bar with a diameter of 12mm for mode scrambling, with a winding number of not less than 5 turns.

[0016] The beneficial effects of this invention are as follows: This invention integrates insertion loss, return loss, and optical power testing functions into one unit. Through a wavelength linkage module, when the user switches the light source wavelength, the central control unit automatically and synchronously calibrates the wavelength of the optical power detection module, avoiding the tedious manual setting and eliminating repeated testing caused by wavelength mismatch. Simultaneously, it supports simultaneous measurement of insertion loss / return loss and one-click zeroing / calibration, reducing the overall testing time for a single fiber optic assembly by more than 60%, perfectly adapting to industrial batch testing scenarios.

[0017] The central control unit incorporates a highly stable laser and a low-drift detection circuit, achieving an output stability of ±0.02dB / hour after preheating. In the return loss test, a standardized process of "zeroing (eliminating background noise) - calibration (establishing a 14.8dB standard) - testing," combined with a precision winding method, achieves high-precision measurement (return loss ±0.25dB, insertion loss ±0.02dB), effectively eliminating human error and system drift.

[0018] This invention uses a color recognition module to compare test results with preset thresholds in real time, displaying them directly on a color display screen as red (fail) / green (pass), greatly reducing operator eye fatigue and the risk of misjudgment. Furthermore, the USB data communication module enables automatic uploading and management of test data, facilitating quality traceability and statistical analysis.

[0019] The detachable connector design makes the test interface easy to clean and supports quick replacement of various adapters such as FC, SC, LC, and ST. It is also compatible with single-mode, multi-mode, and non-standard connector testing, which extends the service life of the instrument and reduces the cost of use.

[0020] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the internal structure of a rapid testing device for optical fiber components as described in an embodiment of the present invention; Figure 2 This is a schematic diagram of the panel structure of a rapid testing device for optical fiber components as described in an embodiment of the present invention; Figure 3 This is a schematic diagram of a rapid testing method for optical fiber components as described in an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals or letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Example 1

[0026] Firstly, such as Figure 1 and Figure 2As shown, this embodiment provides a rapid testing device for optical fiber components, including a metal-shielded environmentally friendly main chassis. The front panel is provided with a display screen mounting position, a light source output port, an optical power receiving port, and a button group opening; the rear panel is provided with a foot pedal interface, a USB interface, a cooling fan hole, a power socket, and a power switch; the interior is provided with a PCB fixing bracket and a module positioning slot.

[0027] The main chassis includes a light source output module, which is located inside the main chassis and is used to output a test signal with a target wavelength in response to a wavelength switching command; and an optical power detection module, which is located inside the main chassis and is used to receive optical signals and convert them into corresponding electrical signals. The central control unit is electrically connected to the light source output module and the optical power detection module, respectively. The central control unit includes: a wavelength linkage control module, which, in response to a wavelength switching command, synchronously controls the output wavelength of the light source output module and the calibration wavelength of the optical power detection module; a data acquisition and processing module, which acquires the reference optical power value P0 and the test optical power value P1 acquired by the optical power detection module, and calculates the insertion loss value according to the formula IL = P1 - P0; and acquires the noise floor signal value R0 and the reflected light signal value R1 acquired by the optical power detection module, and calculates the return loss value according to the formula RL = 14.8dB + (R1-R0); a threshold comparison and judgment module, which compares the calculated insertion loss value with a preset insertion loss threshold, or compares the calculated return loss value with a preset return loss threshold, and generates a comparison result; and a display driving module, which drives the display module to indicate the "qualified" or "unqualified" status with different colors according to the comparison result.

[0028] In this embodiment, the optical interfaces of the light source output module and the optical power detection module are both detachable movable connectors, which support quick replacement of FC, SC, and ST type adapters and φ2.5mm and φ1.25mm ferrules.

[0029] In this embodiment, the threshold comparison and determination module is specifically configured as follows: When the insertion loss value is less than or equal to the preset upper limit threshold or the return loss value is greater than or equal to the preset lower limit threshold, it is considered qualified; when the insertion loss value is greater than or equal to the preset upper limit threshold or the return loss value is less than or equal to the preset lower limit threshold, it is considered unqualified; the display driving module drives the color display screen to display the qualified result in green and the unqualified result in red.

[0030] In this embodiment, a USB data communication module and a foot switch interface connected to the central control unit are also included; in response to the foot switch trigger signal, the central control unit automatically uploads the insertion loss value, return loss value, test wavelength and timestamp data of this test to an external computer through the USB data communication module.

[0031] In this embodiment, the central control unit further includes a mode control unit. The mode control unit responds to the mode switching command and configures the device to operate in an integrated insertion and return loss test mode, an independent optical power meter mode, or a dual-wavelength parallel test mode. In the dual-wavelength parallel test mode, the central control unit controls the light source output module to output two optical signals of different wavelengths in sequence, and calculates and displays the insertion loss value and return loss value at the corresponding wavelengths respectively.

[0032] In this embodiment, the central control unit further includes a preheating determination module; the preheating determination module is used to monitor the output optical power fluctuation of the light source output module in real time after the device is powered on, and when the output optical power fluctuation is less than or equal to ±0.02dB / hour, it determines that the preheating is completed and outputs a ready signal; the display driving module responds to the ready signal and prompts on the display driving module that the test can be performed.

[0033] In this embodiment, the main chassis is provided with a physical button group, which includes a wavelength switching button, a return loss zeroing button, an insertion loss zeroing button, and a return loss calibration button. The central control unit is configured to: in response to a short press of the return loss zeroing button, perform the acquisition of the noise floor signal value R0; in response to a long press of the return loss calibration button for a duration of 5 seconds, perform the calibration of the standard reflection signal; and in response to a short press of the insertion loss zeroing button, perform the acquisition of the reference optical power value P0.

[0034] Connections: The internal components include a control motherboard (central control unit, light source output module, light power detection module) and a power supply module; the front panel houses a color display and interaction module; and the rear panel contains a data communication module, a foot pedal trigger module, a heat dissipation module, and a power interface.

[0035] • Application: Serves as the load-bearing and protective structure for the entire machine, shields against electromagnetic interference, ensures the stable operation of internal precision optoelectronic modules, and provides a standardized operating interface.

[0036] Light source output module structure: It consists of a high-stability laser, a wavelength switching unit, and a detachable optical interface; Single-mode / multi-mode integrated type: 850nm multi-mode laser + 1310 / 1550nm single-mode laser, multi-mode FC / UPC, single-mode FC / APC; • Connection relationship: The electrical end connects to the central control unit and the power module; the optical output end connects to the standard test jumper via the active interface; the wavelength switching unit is controlled by the central control unit to achieve synchronous wavelength switching.

[0037] Applications: Outputs stable, low-drift test optical signals to provide an optical excitation source for insertion loss and return loss testing.

[0038] Optical power detection module structure: It consists of a high-precision photodetector, a signal amplification circuit, and a detachable receiving interface; the detection surface diameter is 2mm, and it supports wavelength detection of 850 / 980 / 1300 / 1310 / 1490 / 1550 / 1625nm.

[0039] • Connection relationship: The optical receiver is connected to the output end of the fiber optic component under test to receive the test optical signal; the electrical end is connected to the central control unit to convert the optical signal into an electrical signal and transmit it.

[0040] • Application: Performs photoelectric conversion and signal amplification, providing raw data for insertion loss calculation, return loss calculation, and optical power measurement.

[0041] The central control unit consists of a microprocessor, a data processing unit, a storage unit, a wavelength linkage logic unit, a threshold judgment unit, a mode control unit, and an I / O interface unit.

[0042] • Connection relationships: Input end: connects to the color display interaction module, light power detection module, and foot trigger module; Output end: connects to the light source output module, color display interaction module, and data communication module; Storage end: saves threshold, time, language, and calibration parameters.

[0043] • Application: The core control and data processing center of the whole machine, realizing wavelength synchronization control, insertion loss / return loss calculation, qualification judgment, mode switching, data storage and transmission.

[0044] The color display interaction module structure consists of a 3.5-inch color LCD screen (320×240) and a physical button group, including: wavelength switching, zeroing the return loss, zeroing the dB insertion loss, calibrating the return loss, setting the settings, adjusting the + / - values, and confirming with Enter.

[0045] • Connection relationship: The button input connects to the central control unit; the display driver receives data and color instructions output by the central control unit.

[0046] • Purpose: To display test data, working status, and time in real time; to receive user operations; and to visually indicate pass / fail status using green / red colors.

[0047] Data communication module structure: USB communication unit and data transmission protocol.

[0048] Connection: One end connects to the central control unit, and the other end connects to an external computer via a USB cable.

[0049] Purpose: To enable automatic uploading, storage, and export of test data, and to support batch management and analysis on a computer.

[0050] Power module structure: Wide voltage AC-DC conversion circuit, input AC 90–260V.

[0051] Connections: Input is connected to AC power; output powers the light source output module, light power detection module, central control unit, display module, and heat dissipation module. A stable DC power supply is provided to ensure continuous operation of the entire unit for extended periods.

[0052] Cooling module structure: Silent cooling fan + ventilation holes. Connection relationship: Electrically connected to the power module, mechanically fixed to the rear of the chassis at the location of the corresponding heat-generating components. This reduces the temperature of the laser and control unit, improving long-term testing stability.

[0053] Example 2

[0054] Secondly, such as Figure 3 As shown, this embodiment provides a rapid testing method for fiber optic components based on the aforementioned device, including the following steps executed by the central control unit: Step S1. In response to the insertion loss zeroing command, acquire and store the reference optical power value P0 input by the optical power detection module; Step S2: In response to the wavelength switching command, synchronously control the light source output module to switch wavelengths and calibrate the detection wavelength of the optical power detection module; Step S3: In response to the insertion loss test command, acquire and store the test optical power value P1 input by the optical power detection module after passing through the fiber optic component under test; Step S4: Calculate the insertion loss value according to the formula IL = P1 - P0, and output the color code to the display driver module according to the comparison result.

[0055] In this embodiment, a return loss test step is also included: Step S5: In response to the return loss zeroing command, acquire and store the noise floor signal value R0 input by the optical power detection module; Step S6: In response to the return loss calibration command, calibrate and store the standard reflection signal as a reference value of 14.8dB; Step S7: In response to the return loss test command, acquire and store the reflected light signal value R1 input by the optical power detection module and returned through the fiber optic component under test; Step S8: Calculate the return loss value according to the formula RL = 14.8dB + (R1-R0), and output the color code to the display driver module according to the comparison result.

[0056] In this embodiment, when the fiber optic assembly under test is a multimode fiber optic assembly, the method further includes a multimode testing step: the central control unit controls the light source output module to switch to the multimode light source wavelength; before performing the insertion loss zeroing operation, the test light signal is controlled to be output to the test main line, and the test main line is wound with a 12mm diameter round bar for mode scrambling, with a winding number of not less than 5 turns.

[0057] A rapid testing method for fiber optic components based on the above-mentioned device Overall test process Power-on warm-up → System initialization → Mode and threshold settings → Insertion loss test → Return loss test → Multi-mode specialized test → Data upload and storage. The entire process is automatically completed by the central control unit, including data acquisition, processing, judgment, display, and transmission.

[0058] Power-on warm-up and system initialization 1. Connect the power supply and turn on the power switch. The device will automatically turn on and enter the insertion and return loss mode. 2. The central control unit initializes the light source, detector, display screen, and storage unit; 3. For routine tests, warm up for 10–15 minutes; for precision tests, warm up for 30 minutes. 4. The central control unit monitors the power of the light source in real time. When the fluctuation is ≤ ±0.02dB / hour, it is determined that the preheating is complete and the test is ready.

[0059] Insertion loss test method (insertion loss) 1. For standard jumper matching, use FC / APC jumpers for single-mode and FC / UPC jumpers for multi-mode; use APC-PC markings on the PC end face and APC-APC markings on the APC end face. For non-standard connectors, use non-standard dedicated LC / APC-non-standard PC jumpers.

[0060] 2. Zeroing insertion loss (establishing a baseline): Connect one end of the standard jumper to the light source output port and the other end to the optical power detection port; briefly press the [dB] key; the central control unit collects the current power and records it as the baseline value P0, and the display shows IL=0.00dB.

[0061] 3. Connect the test standard jumper to the input terminal of the component under test via a flange, and connect the output terminal of the component under test to the optical power detection port; the central control unit collects the power P1 in real time.

[0062] 4. Data processing logic insertion loss calculation formula: IL(dB) = P1(dBm) − P0(dBm) 5. Threshold determination logic: If IL ≤ the set insertion loss upper limit → the display shows green (qualified); if IL > the set insertion loss upper limit → the display shows red (unqualified).

[0063] Return loss test method (return loss) 1. Zeroing back loss (eliminating system error): Connect the standard jumper APC end to the light source output port, and tightly wrap the end with a φ3–5mm winding rod ≥5 turns; briefly press [Zero]; the central control unit collects the noise floor as R0, and displays RL=75dB.

[0064] 2. Return Loss Calibration (Standard Calibration): Connect the standard jumper to the optical power detection port on the PC end; press and hold [Ref] for 5 seconds; the central control unit will calibrate the standard reflection signal to 14.8dB, completing the reference calibration.

[0065] 3. Connect the test standard jumper to the PC end of the component under test, and wrap the jumper tightly around the input end of the component under test 5 times; the central control unit collects the reflected signal R1.

[0066] 4. Data processing logic backlash calculation formula: RL(dB) = 14.8dB + (R1− R0) 5. Threshold determination logic: If RL ≥ the set lower limit of return loss → the display shows green (qualified); if RL < the set lower limit of return loss → the display shows red (unqualified).

[0067] Automatic wavelength synchronization logic When the [λ] key is pressed to switch wavelengths, the central control unit synchronously controls the output wavelength of the light source and the optical power detection calibration wavelength, eliminating the need for separate settings and avoiding wavelength mismatch errors.

[0068] Multimode fiber optic component testing methods 1. Select a multimode light source (850 / 1300nm) and preheat for 10–15 minutes; 2. Connect the FC / UPC end of the multimode test main line to the light source output port, and wrap it with a φ12mm round bar for ≥5 turns to induce a mode disturbance; 3. Connect the optical power detection port at the end of the main line and briefly press [dB] to zero the insertion loss; 4. Connect the flange to the multi-mode component under test, read the IL value, and automatically determine the pass / fail status by color.

[0069] Smart settings and data upload 1. Press [Set] to enter the settings interface, where you can switch between insertion loss mode / power meter mode / dual wavelength mode; 2. Insertion loss threshold, return loss threshold, time, and language can be set, and factory settings can be restored; when connected to a computer via USB, the central control unit automatically uploads the test data (IL, RL, wavelength, time, serial number) to the computer via USB, enabling data archiving, analysis, and report output.

[0070] The central control unit integrates the following functional modules through internal embedded software and hardware collaboration: Wavelength-linked control module: The core of this module is a piece of embedded software code stored in memory. When the central control unit detects that the wavelength switching key has been pressed, this module simultaneously sends a wavelength selection signal to the light source driving circuit and writes the corresponding wavelength calibration coefficient to the calibration register of the optical power detection module, realizing "one-key dual control".

[0071] Data Acquisition and Calculation Module: This module reads the digital optical power value output by the analog-to-digital converter of the optical power detection module at a set sampling frequency. In the insertion loss zero state, multiple consecutive samples are taken, and the average value is recorded as the reference optical power value. In the insertion loss test state, multiple consecutive samples are taken, and the average value is recorded as the test optical power value. Then, a subtraction operation is performed to obtain the insertion loss value. In return loss mode, the noise floor signal value and the reflected light signal value are similarly acquired, and the return loss calculation formula is executed.

[0072] Threshold Comparison and Judgment Module: Users can access the threshold setting interface via the setting key, value adjustment key, and confirmation key to set the upper limit threshold for insertion loss and the lower limit threshold for return loss. This module compares the calculation result with the threshold and generates a Boolean judgment signal.

[0073] Display driver module: This module drives the color LCD screen based on the judgment signal. When the test is qualified, the test value is displayed in large green font; when it is unqualified, it is displayed in large red font. It also displays information such as the current wavelength, mode, and time.

[0074] Preheating determination module: After power-on, this module records the light source output power value at regular intervals and stores it in a cache. When the difference between the maximum and minimum power values ​​within a certain period is less than or equal to ±0.02 dB per hour, the preheating is determined to be complete, and the user is prompted to proceed with the test.

[0075] Mode control unit: Responds to the mode option in the setting key menu, switches between three working modes: insertion loss integrated test mode, independent optical power meter mode, and dual-wavelength parallel test mode.

[0076] When performing an insertion loss test, an operator first selects a standard test patch cord of the same type as the component to be tested, connects one end of the standard test patch cord to the light source output port, and connects the other end to the receiving port of an optical power meter. After the device is powered on and preheated, the required test wavelength is selected through the wavelength switching key. Briefly press the insertion loss zeroing key, the central control unit collects the current optical power value, stores it as a reference optical power value, and the insertion loss value on the display screen is reset to zero.

[0077] Subsequently, the operator keeps one end of the standard test patch cord connected to the light source output port unchanged, pulls out the other end of the standard test patch cord from the interface of the optical power meter, connects it to the input end of the tested optical fiber component through a flange, and then connects the output end of the component to be tested to the receiving port of the optical power meter. After the central control unit automatically detects that the optical power changes and stabilizes, it collects the current optical power value as the test optical power value, and calculates the insertion loss value according to the formula. The central control unit compares the calculated value with a preset upper threshold of insertion loss: if the calculated value is less than or equal to the upper threshold, the tested component is determined as qualified, and the value is displayed in green on the display screen; if the calculated value is greater than the upper threshold, it is determined as unqualified, and the value is displayed in red. After the operator reads the color and the numerical value, one insertion loss test is completed.

[0078] When performing a return loss test, an operator first prepares a standard test patch cord. Connects the first end of the patch cord (usually an APC end with an oblique angle) to the light source output port. On the second end of the patch cord (usually a flat PC end), tightly wind more than five turns around a winding rod with a diameter of 3 to 5 millimeters, and then connect the end to the receiving port of the optical power meter. Briefly press the return loss zeroing key, the central control unit collects the optical power value at this time, records it as a background noise signal value, and the display screen shows a large return loss value (representing that the measured background noise is extremely small).

[0079] Subsequently, keeping the first end of the standard patch cord connected to the light source output port unchanged, remove the tight winding on the second end, and directly connect the second end to the receiving port of the optical power meter (or place it in the air), at this time, about 4% Fresnel reflection is generated on the end fiber end face. Long press the return loss calibration key for 5 seconds, the central control unit collects the reflected signal at this time, calibrates it as a reference value of 14.8 decibels, and the display screen shows that calibration is successful.

[0080] Finally, keeping the first end of the standard patch cord connected to the light source output port, pull out the second end of the standard patch cord from the optical power meter, and connect it to one end of the tested optical fiber component through a flange. Tightly wind more than five turns with a winding rod at the position of the tested component close to the connection to eliminate back-end reflection. The central control unit collects the current reflected signal, calculates the return loss value according to the formula, and compares the calculated value with a preset lower threshold of return loss: if the calculated value is greater than or equal to the lower threshold, the tested component is determined as qualified and the value is displayed in green; if the calculated value is less than the lower threshold, it is determined as unqualified and the value is displayed in red.

[0081] When the component under test is a multimode fiber optic assembly, the operator first switches the device to multimode mode using the setting key. The central control unit then controls the light source output module to switch to a multimode wavelength (e.g., 850 nm). A multimode test mainline is selected, and one end is connected to the light source output port. The middle section of the mainline is tightly wound at least five times around a 12 mm diameter rod to perform mode scrambling and eliminate higher-order mode interference. The end of the mainline is connected to the optical power meter receiver, and the insertion loss is zeroed by briefly pressing the zeroing button. The multimode component under test is connected to the end of the mainline and the power meter via a flange. The insertion loss value is read, and the color is automatically used to determine whether it passes or fails.

[0082] Connect the USB data cable to the USB port on the rear panel of the device to an external computer, and install the accompanying host computer software on the computer. After completing an insertion loss and return loss test on the device, the operator presses the foot switch connected to the foot switch interface. The central control unit detects the foot switch trigger signal and immediately sends the data such as the insertion loss value, return loss value, test wavelength, test date and time, and device serial number to the external computer via the USB communication module. After receiving the data, the host computer software can automatically store it in a database, fill it into a spreadsheet, or generate a QR code label to achieve quality traceability and batch data analysis.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rapid testing device for optical fiber components, characterized in that, include: Main chassis; The light source output module, located inside the main chassis, is used to output a test signal with the target wavelength in response to a wavelength switching command. An optical power detection module, located inside the main chassis, is used to receive optical signals and convert them into corresponding electrical signals; The central control unit is electrically connected to both the light source output module and the optical power detection module. The central control unit includes: The wavelength linkage control module, in response to the wavelength switching command, synchronously controls the output wavelength of the light source output module and the calibration wavelength of the optical power detection module; The data acquisition and processing module acquires the reference optical power value P0 and the test optical power value P1 acquired by the optical power detection module, and calculates the insertion loss value according to the formula IL = P1 - P0; and acquires the noise floor signal value R0 and the reflected light signal value R1 acquired by the optical power detection module, and calculates the return loss value according to the formula RL = 14.8dB + (R1-R0). The threshold comparison and judgment module compares the calculated insertion loss value with the preset insertion loss threshold, or compares the calculated return loss value with the preset return loss threshold, and generates the comparison result. The display driver module, based on the comparison result, drives the display module to indicate the qualified or unqualified status with different colors.

2. The rapid testing device for optical fiber components according to claim 1, characterized in that, The optical interfaces of the light source output module and the optical power detection module are both detachable connectors, which support quick replacement of FC, SC, and ST type adapters and φ2.5mm and φ1.25mm ferrules.

3. The rapid testing device for optical fiber components according to claim 1, characterized in that, The threshold comparison and determination module is specifically configured as follows: When the insertion loss value is less than or equal to the preset upper limit threshold or the return loss value is greater than or equal to the preset lower limit threshold, it is considered qualified; when the insertion loss value is greater than or equal to the preset upper limit threshold or the return loss value is less than or equal to the preset lower limit threshold, it is considered unqualified; the display driving module drives the color display screen to display the qualified result in green and the unqualified result in red.

4. The rapid testing device for optical fiber components according to claim 3, characterized in that, It also includes a USB data communication module and a foot switch interface connected to the central control unit; in response to the foot switch trigger signal, the central control unit automatically uploads the insertion loss value, return loss value, test wavelength and timestamp data of this test to an external computer through the USB data communication module.

5. The rapid testing device for optical fiber assemblies according to any one of claims 1-4, characterized in that, The central control unit also includes a mode control unit. The mode control unit responds to the mode switching command and configures the device to operate in the insertion loss and return loss integrated test mode, the independent optical power meter mode, or the dual-wavelength parallel test mode. In the dual-wavelength parallel test mode, the central control unit controls the light source output module to output two optical signals of different wavelengths in sequence, and calculates and displays the insertion loss value and return loss value at the corresponding wavelengths respectively.

6. The rapid testing device for optical fiber components according to claim 5, characterized in that, The central control unit also includes a preheating determination module; the preheating determination module is used to monitor the output optical power fluctuation of the light source output module in real time after the device is powered on. When the output optical power fluctuation is less than or equal to ±0.02dB / hour, the preheating is determined to be complete and a ready signal is output; the display driver module responds to the ready signal and prompts on the display driver module that the test can be performed.

7. The rapid testing device for optical fiber components according to claim 6, characterized in that, The main chassis is equipped with a physical button group, which includes a wavelength switching button, a return loss zeroing button, an insertion loss zeroing button, and a return loss calibration button. The central control unit is configured to: in response to a short press of the return loss zeroing button, perform the acquisition of the noise floor signal value R0; in response to a long press of the return loss calibration button for a duration of 5 seconds, perform the calibration of the standard reflection signal. In response to a short press of the insertion loss zeroing key, the reference optical power value P0 is acquired.

8. A rapid testing method for optical fiber components based on the device of claim 7, characterized in that, The following steps are performed by the central control unit: Step S1. In response to the insertion loss zeroing command, acquire and store the reference optical power value P0 input by the optical power detection module; Step S2: In response to the wavelength switching command, synchronously control the light source output module to switch wavelengths and calibrate the detection wavelength of the optical power detection module; Step S3: In response to the insertion loss test command, acquire and store the test optical power value P1 input by the optical power detection module after passing through the fiber optic component under test; Step S4: Calculate the insertion loss value according to the formula IL = P1 - P0, and output the color code to the display driver module according to the comparison result.

9. The rapid testing method for optical fiber components according to claim 8, characterized in that, It also includes a retracement test step: Step S5: In response to the return loss zeroing command, acquire and store the noise floor signal value R0 input by the optical power detection module; Step S6: In response to the return loss calibration command, calibrate and store the standard reflection signal as a reference value of 14.8dB; Step S7: In response to the return loss test command, acquire and store the reflected light signal value R1 input by the optical power detection module and returned through the fiber optic component under test; Step S8: Calculate the return loss value according to the formula RL = 14.8dB + (R1-R0), and output the color code to the display driver module according to the comparison result.

10. The rapid testing method for optical fiber components according to claim 9, characterized in that, When the fiber optic assembly under test is a multimode fiber optic assembly, the method further includes a multimode testing step: the central control unit controls the light source output module to switch to the multimode light source wavelength; before performing the insertion loss zeroing operation, the test optical signal is controlled to be output to the test main line, and the test main line is wound with a 12mm diameter round bar for mode scrambling, with a winding number of not less than 5 turns.

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