Optical module

Abstract

The invention discloses an optical module. The optical module comprises a light emitting chip, a photoelectric detector, a control chip and a light emitting chip, and the control chip converts the electric signal of the photoelectric detector into the current optical power. And when the current optical power is 0, the degradation count is reset. The current optical power is not 0, the current optical power is larger than a second limit threshold value, the output bias current is not the second bias current, and the degradation count is reset. The current optical power is not 0, the current optical power is less than or equal to a second limit threshold, and 1 is added to the degradation count; when the degradation count is larger than or equal to the preset value, the bias current is set to be second bias current, and the second bias current is larger than the working current of the light emitting chip. And if the current optical power is not 0 and the current optical power is less than or equal to a second limit threshold, outputting an optical power alarm signal. According to the optical module provided by the invention, the magnitude of the bias current of the degraded light emitting chip can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an optical module. Background Art

[0002] Optical communication technology has gradually entered thousands of households. Optical modules, which perform photoelectric conversion, are core components in optical communication systems and are used in a variety of network devices within these systems. Before leaving the factory and being installed in an optical communication system, optical modules undergo a commissioning process. This commissioning process is performed on the manufacturer's commissioning production line to ensure that the optical power emitted by the optical module (referring to the optical power output by the optical module's laser) is within an appropriate range. Therefore, the performance of the optical module directly affects the operating status of network equipment and ultimately affects the user's daily network experience.

[0003] In related technologies, a commonly used method for adjusting the optical power of an optical module is to set a target optical power point for the optical module, detect the optical power output by the optical module laser, and adjust the bias current of the input laser according to the detected optical power until the optical power output by the optical module laser reaches the target optical power point.

[0004] When the optical power output by the laser in the optical module is lower than a preset value, an alarm or optical power alarm signal will be reported. Summary of the Invention

[0005] The present application provides an optical module, which increases the optical power of the optical module when the optical module sends an optical power alarm signal.

[0006] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0007] In one aspect, an embodiment of the present application discloses an optical module, comprising:

[0008] an optical transmitter chip configured to transmit an optical signal;

[0009] a photodetector configured to convert the optical power of the emitted optical signal into an electrical signal;

[0010] A control chip connected to the photodetector and the light emitting chip;

[0011] The control chip is configured as follows:

[0012] Converting the electrical signal into current optical power;

[0013] The current optical power is 0, and the degradation count is reset to zero;

[0014] If the current optical power is not 0, the current optical power is greater than the second limit threshold, and the output bias current is not the second bias current, the degradation count is cleared.

[0015] If the current optical power is not 0 and is less than or equal to the second limit threshold, the degradation count is incremented by 1.

[0016] When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current, wherein the second bias current makes the bias current greater than an operating current of the light emitting chip;

[0017] If the current optical power is not 0 and is less than or equal to the second limit threshold, an optical power alarm signal is output.

[0018] In a second aspect, an embodiment of the present application discloses an optical module, comprising: an optical transmitting chip configured to transmit an optical signal;

[0019] a photodetector configured to convert the optical power of the emitted optical signal into an electrical signal;

[0020] A control chip connected to the photodetector and the light emitting chip;

[0021] The control chip is configured as follows:

[0022] Converting the electrical signal into current optical power;

[0023] The calibration value is the same as the preset calibration coefficient, and the degradation count is reset to zero;

[0024] If the calibration value is different from the preset calibration coefficient and the current optical power is 0, the degradation count is reset;

[0025] If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, the current optical power is greater than the second limit threshold, or the output bias current is not the second bias current, the degradation count is reset.

[0026] If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to the second limit threshold, the degradation count is incremented by 1.

[0027] When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current, and the second bias current makes the bias current greater than the operating current of the light emitting chip.

[0028] In a third aspect, an embodiment of the present application discloses an optical module, comprising:

[0029] a photodetector configured to convert the optical power of the emitted optical signal into an electrical signal;

[0030] A control chip connected to the photodetector and the light emitting chip;

[0031] The control chip is configured as follows:

[0032] Converting the electrical signal into current optical power;

[0033] The current optical power is 0, and the degradation count is reset to zero;

[0034] If the current optical power is greater than the second limit threshold and the output bias current is not the second bias current, the degradation count is reset.

[0035] If the current optical power is not 0 and is less than or equal to the second limit threshold, the degradation count is incremented by 1.

[0036] When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current, wherein the second bias current makes the bias current greater than an operating current of the light emitting chip;

[0037] If the current optical power is not 0 and is less than or equal to the second limit threshold, an optical power alarm signal is output;

[0038] The current optical power is greater than or equal to the first limit threshold, and the bias current is adjusted to make the optical power of the light emitting chip reach the target optical power.

[0039] In a fourth aspect, an embodiment of the present application discloses an optical module, comprising: a photodetector configured to convert the optical power of the transmitted optical signal into an electrical signal;

[0040] A control chip connected to the photodetector and the light emitting chip

[0041] The control chip is configured as follows:

[0042] Converting the electrical signal into current optical power;

[0043] The calibration value is the same as the preset calibration coefficient, and the degradation count is reset to zero;

[0044] If the calibration value is different from the preset calibration coefficient and the current optical power is 0, the degradation count is reset;

[0045] If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, the current optical power is greater than the second limit threshold, or the output bias current is not the second bias current, the degradation count is reset.

[0046] If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to the second limit threshold, the degradation count is incremented by 1.

[0047] When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current, wherein the second bias current makes the bias current greater than an operating current of the light emitting chip;

[0048] If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to the second limit threshold, an optical power alarm signal is output;

[0049] The current optical power is greater than or equal to the first limit threshold, and the bias current is adjusted to make the optical power of the light emitting chip reach the target optical power.

[0050] Compared with the prior art, the present invention has the following advantages:

[0051] This application discloses an optical module, comprising: a light emitting chip for emitting an optical signal; a photodetector for converting the optical power of the emitted optical signal into an electrical signal; and a control chip for converting the electrical signal into the current optical power. When the current optical power is 0, a degradation counter is reset to zero, preventing misjudgments in the event of a light-off condition. If the current optical power is not 0, greater than a second threshold, or the output bias current is not the second bias current, the degradation counter is reset to zero, eliminating any discontinuous occurrences of the current optical power falling below the second threshold. If the current optical power is not 0 or less than or equal to the second threshold, the degradation counter is incremented by one. If the degradation counter is greater than or equal to a preset value, the bias current is set to the second bias current, which ensures that the bias current of the driver circuit exceeds the operating current of the light emitting chip. If the current optical power is not 0 or less than or equal to the second threshold, an optical power alarm signal is output. This application identifies a situation in which the current optical power falls below the second threshold for a preset number of consecutive times as light emitting chip degradation. The bias current of the light emitting chip is increased after degradation, ensuring continued light emission, thereby extending the product lifecycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0053] Figure 1 is a partial architecture diagram of an optical communication system according to some embodiments;

[0054] Figure 2 is a partial structural diagram of a host computer according to some embodiments;

[0055] Figure 3 is a structural diagram of an optical module according to some embodiments;

[0056] Figure 4 is an exploded view of an optical module according to some embodiments;

[0057] Figure 5 A schematic diagram of a partial structure of an optical module provided according to some embodiments of the present disclosure;

[0058] Figure 6 A schematic diagram of a partial structure of an optical module provided according to some embodiments of the present disclosure;

[0059] Figure 7 A schematic diagram of a method for controlling transmitted optical power according to some embodiments of the present disclosure;

[0060] Figure 8 A method for controlling the transmitted optical power according to some embodiments of the present disclosure is provided. Figure 1 ;

[0061] Figure 9 A method for controlling the transmitted optical power according to some embodiments of the present disclosure is provided. Figure 2 ;

[0062] Figure 10 A method for controlling the transmitted optical power according to some embodiments of the present disclosure is provided. Figure 3 . DETAILED DESCRIPTION

[0063] Optical communication technology enables information transmission between information processing devices. It loads information onto light and uses the propagation of light to achieve this transmission. Light loaded with information is an optical signal. The propagation of optical signals within information transmission equipment reduces optical power loss, enabling high-speed, long-distance, and low-cost information transmission. The information processed by information processing equipment exists in the form of electrical signals. Optical network terminals / gateways, routers, switches, mobile phones, computers, servers, tablets, and televisions are common information processing devices, and optical fibers and optical waveguides are common information transmission devices.

[0064] The conversion of optical signals and electrical signals between information processing equipment and information transmission equipment is achieved through optical modules. For example, an optical fiber is connected to the optical signal input end and / or optical signal output end of the optical module, and an optical network terminal is connected to the electrical signal input end and / or electrical signal output end of the optical module. A first optical signal from the optical fiber is transmitted into the optical module, and the optical module converts the first optical signal into a first electrical signal, which is then transmitted into the optical network terminal. A second electrical signal from the optical network terminal is transmitted into the optical module, and the optical module converts the second electrical signal into a second optical signal, which is then transmitted into the optical fiber. Since information processing devices can be connected to each other through an electrical signal network, at least one type of information processing device needs to be directly connected to the optical module, and not all types of information processing devices need to be directly connected to the optical module. The information processing device directly connected to the optical module is called the host computer of the optical module.

[0065] Figure 1 FIG. 1 is a partial architecture diagram of an optical communication system according to some embodiments. Figure 1 As shown, a part of the optical communication system is presented as a remote information processing device 1000 , a local information processing device 2000 , a host computer 100 , an optical module 200 , an optical fiber 101 and a network cable 103 .

[0066] One end of optical fiber 101 extends toward remote information processing device 1000, and the other end connects to the optical interface of optical module 200. Optical signals can undergo total internal reflection within optical fiber 101, maintaining nearly their original optical power as they propagate in the direction of total internal reflection. Multiple total internal reflections within optical fiber 101 transmit optical signals from the direction of remote information processing device 1000 into optical module 200, or transmit light from optical module 200 toward remote information processing device 1000, enabling long-distance, low-power information transmission.

[0067] The number of optical fibers 101 may be one or more (two or more); the optical fiber 101 and the optical module 200 may be connected in a pluggable movable manner or in a fixed manner.

[0068] The host computer 100 has an optical module interface 102, which is configured to connect to the optical module 200, so that the host computer 100 establishes a unidirectional / bidirectional electrical signal connection with the optical module 200; the host computer 100 is configured to provide data signals to the optical module 200, or receive data signals from the optical module 200, or monitor and control the working status of the optical module 200.

[0069] The host computer 100 has an external electrical interface, such as a Universal Serial Bus (USB) interface and a network cable interface 104, which can be connected to an electrical signal network. For example, the network cable interface 104 is configured to connect to a network cable 103, thereby establishing a unidirectional / bidirectional electrical signal connection between the host computer 100 and the network cable 103.

[0070] Optical Network Unit (ONU), Optical Line Terminal (OLT), Optical Network Equipment (ONT) and data center servers are common host computers.

[0071] One end of the network cable 103 is connected to the local information processing device 2000 , and the other end is connected to the host computer 100 . The network cable 103 establishes an electrical signal connection between the local information processing device 2000 and the host computer 100 .

[0072] For example, the third electrical signal emitted by the local information processing device 2000 is transmitted to the host computer 100 through the network cable 103. The host computer 100 generates a second electrical signal based on the third electrical signal. The second electrical signal from the host computer 100 is transmitted into the optical module 200. The optical module 200 converts the second electrical signal into a second optical signal. The optical module 200 transmits the second optical signal into the optical fiber 101. The second optical signal is transmitted to the remote information processing device 1000 in the optical fiber 101.

[0073] For example, a first optical signal from the direction of the remote information processing device 1000 propagates through the optical fiber 101, and the first optical signal from the optical fiber 101 is transmitted into the optical module 200. The optical module 200 converts the first optical signal into a first electrical signal. The optical module 200 transmits the first electrical signal into the host computer 100. The host computer 100 generates a fourth electrical signal based on the first electrical signal, and the host computer 100 transmits the fourth electrical signal to the local information processing device 2000.

[0074] Optical modules are tools for converting optical signals into electrical signals. During this conversion process, the information remains unchanged, but the encoding and decoding methods of the information can change.

[0075] Figure 2 FIG1 is a partial structural diagram of a host computer according to some embodiments. In order to clearly show the connection relationship between the optical module 200 and the host computer 100, Figure 2 Only the structures related to the host computer 100 and the optical module 200 are shown. Figure 2As shown, the host computer 100 also includes a PCB circuit board 105 arranged in the shell, a cage 106 arranged on the surface of the PCB circuit board 105, a heat sink 107 arranged on the cage 106, and an electrical connector (not shown in the figure) arranged inside the cage 106. The heat sink 107 has a protruding structure that increases the heat dissipation area, and a fin-shaped structure is a common protruding structure.

[0076] Optical module 200 is inserted into cage 106 of host computer 100. Cage 106 secures optical module 200, and heat generated by optical module 200 is transferred to cage 106 and then dissipated through heat sink 107. After optical module 200 is inserted into cage 106, the electrical interface of optical module 200 connects to the electrical connector inside cage 106.

[0077] Figure 3 is a structural diagram of an optical module according to some embodiments. Figure 4 FIG. 1 is an exploded view of an optical module according to some embodiments. Figure 3 and Figure 4 As shown, the optical module 200 includes a housing, a circuit board 300 disposed in the housing, a light emitting component 400, and a light receiving component 500. However, the present disclosure is not limited thereto. In some embodiments, the optical module 200 includes one of the light emitting component 400 and the light receiving component 500.

[0078] The housing includes an upper housing 201 and a lower housing 202 . The upper housing 201 covers the lower housing 202 to form the housing having two openings 204 and 205 . The outer contour of the housing is generally a square.

[0079] In some embodiments, the lower shell 202 includes a base plate 2021 and two lower side plates 2022 located on both sides of the base plate 2021 and arranged perpendicular to the base plate 2021; the upper shell 201 includes a cover plate 2011, and the cover plate 2011 covers the two lower side plates 2022 of the lower shell 202 to form the above-mentioned shell.

[0080] In some embodiments, the lower shell 202 includes a base plate 2021 and two lower side plates 2022 located on both sides of the base plate 2021 and arranged perpendicularly to the base plate 2021; the upper shell 201 includes a cover plate 2011 and two upper side plates located on both sides of the cover plate 2011 and arranged perpendicularly to the cover plate 2011. The two upper side plates are combined with the two lower side plates 2022 to achieve the upper shell 201 covering the lower shell 202.

[0081] The direction of the line connecting the two openings 204 and 205 may be consistent with the length direction of the optical module 200, or may be inconsistent with the length direction of the optical module 200. For example, the opening 204 is located at the end of the optical module 200 ( Figure 3The opening 205 is also located at the end of the optical module 200 ( Figure 3 Alternatively, opening 204 is located at the end of optical module 200, while opening 205 is located on the side of optical module 200. Opening 204 is an electrical interface, through which the gold finger 301 of circuit board 300 extends and is inserted into the electrical connector of the host computer; opening 205 is an optical port, configured to receive optical fiber 101, thereby connecting optical fiber 101 to the optical emitting component 400 and / or optical receiving component 500 in optical module 200.

[0082] The combined assembly of the upper and lower housings 201 and 202 facilitates the installation of components such as the circuit board 300, light emitting component 400, and light receiving component 500 within the housings. These components are encapsulated and protected by the upper and lower housings 201 and 202. Furthermore, during assembly of the circuit board 300, light emitting component 400, and light receiving component 500, positioning components, heat dissipation components, and electromagnetic shielding components are easily positioned, facilitating automated production.

[0083] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials, which facilitates electromagnetic shielding and heat dissipation.

[0084] In some embodiments, the optical module 200 further includes an unlocking component 600 located outside its housing. The unlocking component 600 is configured to achieve a fixed connection between the optical module 200 and the host computer, or to release the fixed connection between the optical module 200 and the host computer.

[0085] For example, the unlocking member 600 is located on the outside of the two lower side panels 2022 of the lower housing 202 and includes engaging components that mate with the cage 106 of the host computer. When the optical module 200 is inserted into the cage 106, the engaging components of the unlocking member 600 secure the optical module 200 within the cage 106. When the unlocking member 600 is pulled, the engaging components of the unlocking member 600 move accordingly, thereby changing the connection between the engaging components and the host computer, thereby releasing the fixed engagement between the optical module 200 and the host computer, allowing the optical module 200 to be removed from the cage 106.

[0086] The circuit board 300 includes circuit traces, electronic components, and chips. The electronic components and chips are connected together according to the circuit design through the circuit traces to achieve functions such as power supply, electrical signal transmission, and grounding. Electronic components may include, for example, capacitors, resistors, transistors, and metal-oxide-semiconductor field-effect transistors (MOSFETs). Chips may include, for example, microcontroller units (MCUs), laser driver chips, transimpedance amplifiers (TIAs), limiting amplifiers, clock and data recovery chips (CDRs), power management chips, and digital signal processing (DSP) chips.

[0087] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the load-bearing function. For example, the rigid circuit board can stably carry the above-mentioned electronic components and chips; the rigid circuit board is also easy to insert into the electrical connector in the upper computer cage.

[0088] The circuit board 300 further includes a gold finger 301 formed on its end surface. The gold finger 301 is composed of a plurality of independent pins. The circuit board 300 is inserted into the cage 106, and the gold finger 301 is connected to the electrical connector in the cage 106. The gold finger 301 can be provided on only one side of the circuit board 300 (for example, Figure 4 The gold finger 301 is configured to establish an electrical connection with the host computer to achieve power supply, grounding, I2C signal transmission, data signal transmission, etc.

[0089] Of course, flexible circuit boards are also used in some optical modules. Flexible circuit boards are generally used in conjunction with rigid circuit boards to supplement rigid circuit boards.

[0090] The light emitting component 400 and / or the light receiving component 500 are located on the side of the circuit board 300 away from the gold finger 301; in some embodiments, the light emitting component 400 and the light receiving component 500 are physically separated from the circuit board 300, and then electrically connected to the circuit board 300 through corresponding flexible circuit boards or electrical connectors; in some embodiments, the light emitting component and / or the light receiving component can be directly set on the circuit board 300, can be set on the surface of the circuit board, and can also be set on the side of the circuit board.

[0091] Figure 5FIG. 1 is a schematic diagram of a partial structure of an optical module according to some embodiments of the present disclosure. Figure 5 As shown, in some embodiments, the optical transmission component 400 may include: an optical transmission chip 410, which can be used to transmit optical signals.

[0092] The light emitting component 400 may include a photodetector 420 for detecting the magnitude of the optical power of the light emitting chip 410 .

[0093] The light emitting component 400 may include a control chip 440, which is connected to the photodetector and the light emitting chip 410. The control chip receives an electrical signal from the photodetector and calculates the current optical power of the light emitting chip based on the electrical signal.

[0094] The control chip 440 can control the magnitude of the output bias current according to the current optical power.

[0095] In some embodiments, a lookup table is stored in the control chip 440 , and the control chip 440 can control the magnitude of the output bias current according to the lookup table.

[0096] In some embodiments, the lookup table may be a mapping relationship between temperature and bias current magnitude.

[0097] The photodetector can convert the received emission light into an emission electrical signal and send the emission electrical signal to the control chip 440. The control chip 440 can convert the emission electrical signal into a data value and control the magnitude of the bias current according to the data value and the lookup table.

[0098] The control chip 440 can control the magnitude of the bias current according to the current optical power value and the lookup table. The bias current obtained by the control chip 440 according to the lookup table is called a normal compensation current.

[0099] In some embodiments, the lookup table includes a correspondence between optical power values ​​and compensation currents, wherein the optical power values ​​include a first limit threshold. When the current optical power value is greater than or equal to the first limit threshold, the control chip 440 controls the magnitude of the compensation current according to the lookup table to compensate for the current optical power.

[0100] In some embodiments, the control chip 440 can preset a target optical power. When the current optical power is greater than the target optical power, the bias current is increased; when the current optical power is less than the target optical power, the bias current is decreased; and when the current optical power is equal to the target optical power, the bias current remains unchanged.

[0101] The control chip 440 may adjust the bias current according to the target optical power so that the current optical power is equal to the target optical power.

[0102] The control chip 440 may store a second limit threshold. When the current optical power is less than or equal to the second limit threshold, the control chip 440 outputs an optical power alarm signal to the gold finger. The alarm signal may be transmitted to the host computer via the gold finger.

[0103] Typically, when the current optical power of the optical module is less than or equal to the second limit threshold, the optical power of the optical module exceeds the normal range, the optical transmitting chip degrades, and the control chip 440 outputs an optical power alarm signal to the gold finger. The alarm signal can be transmitted to the host computer via the gold finger, and the degradation information is reported to the host computer.

[0104] Figure 6 FIG. 1 is a schematic diagram of a partial structure of an optical module according to some embodiments of the present disclosure. Figure 6 As shown, the gold finger 301 includes a warning gold finger 3011 . The warning gold finger 3011 is connected to the control chip 440 .

[0105] For the convenience of description, when the optical power value is the first limit threshold, the bias current output by the control chip 440 is the first bias current.

[0106] In some embodiments, a second bias current is preset in the control chip 440 of the optical module. When the current optical power is less than or equal to the second limit threshold, the control chip 440 outputs the second bias current to the driving circuit to increase the magnitude of the bias current of the driving circuit. When the current optical power is less than or equal to the second limit threshold, the performance of the optical emission chip deteriorates.

[0107] For the convenience of description, when the optical power value is less than or equal to the second limit threshold, the voltage output by the control chip 440 is the second bias current.

[0108] The control chip 440 may be configured to output a second bias current when the current optical power is less than or equal to a second limit threshold, so as to increase the bias current to the second bias current.

[0109] In some embodiments, due to an interruption or light-off during signal transmission, the optical power value of the optical emitting chip is 0 at a certain moment. However, at this time, the performance of the optical emitting chip in the optical module has not deteriorated, and degradation compensation is not required. The control chip 440 can be configured as follows: when the current optical power is less than or equal to the second limit threshold, the degradation count is increased by one. When the degradation count is greater than or equal to the preset value, the control chip 440 outputs a second bias current to the driving circuit. When the current optical power is 0, the degradation count is cleared. After the optical power value is 0, indicating that the signal is interrupted or the light is turned off, the optical module restarts normally, and the degradation count is cleared to avoid degradation compensation for the normal optical module.

[0110] In some embodiments, if the current optical power is less than or equal to the second limit threshold and is not zero, the degradation count is incremented by one. If the degradation count is greater than or equal to a preset value, the control chip 440 outputs a second bias current. If the current optical power remains less than or equal to the second limit threshold, it indicates that the optical transmitter chip of the optical module is continuously degraded. The control chip 440 outputs the second bias current.

[0111] In some embodiments, the second bias current may be greater than the first bias current. The first bias current is the bias current applied to the light emitting chip when the light emitting chip is operating normally, and the second bias current is the bias current applied to the light emitting chip after the light emitting chip degrades.

[0112] In some embodiments, the second bias current may be 10 to 20 times greater than the first bias current.

[0113] In some embodiments, the second bias current may be 10 times the first bias current, 13.5 times the first bias current, or 20 times the first bias current.

[0114] The second bias current is greater than the normal operating current of the light emitting chip, and can drive the degraded light emitting chip so that the degraded light emitting chip can continue to work.

[0115] In some embodiments, when the optical module is not degraded, the bias current is approximately 10-40 mA; when the optical module is degraded, the bias current is approximately 100-800 mA.

[0116] In some embodiments, the control chip 440 may determine whether degradation compensation has been currently performed.

[0117] The control chip 440 can obtain the output bias current. If the output bias current is the second bias current, it indicates that degradation compensation is currently in progress. If degradation compensation is currently in progress, the degradation counter is incremented by one. If degradation compensation is not currently in progress, the degradation counter is reset to zero. Even if the current optical power exceeds the second limit threshold while in degradation compensation mode, this indicates that degradation has occurred on the optical transmitter chip and degradation compensation should continue.

[0118] In some embodiments, the control chip 440 can be configured to: reset the degradation count when the current optical power is 0; reset the degradation count when the current optical power is not 0, the current optical power is greater than the second limit threshold, and the output bias current is not the second bias current; and increment the degradation count by 1 when the current optical power is not 0, the current optical power is less than or equal to the second limit threshold. When the degradation count is greater than or equal to a preset value, the output bias current is set to the second bias current.

[0119] In some examples, the current optical power of 0 can be the optical power value detected by the photodetector. In some examples, the current optical power of 0 can be the light-off signal received from the host computer. In some examples, the current optical power of 0 can be

[0120] If the current optical power is 0, it indicates that an interruption or optical shutdown occurred during signal transmission. However, the performance of the optical transmitter chip in the optical module has not degraded, and degradation compensation is not required. If the output bias current is not the second bias current, degradation compensation has not been performed on the optical transmitter chip. If the current optical power is not 0 or is greater than the second limit threshold, the optical power of the optical transmitter chip can still meet the requirements. If the current optical power is not 0 or is greater than the second limit threshold, and the output bias current is not the second bias current, the degradation counter is cleared, clearing records that are not in a continuous degradation state. This allows degradation compensation to be performed after the degradation state persists for the preset value, extending the lifecycle of the optical module.

[0121] The control chip 440 can be configured to output a control voltage according to the lookup table when the current optical power is greater than or equal to the first limit threshold, and output a first bias current when the current optical power is less than the first limit threshold or greater than the second limit threshold.

[0122] The control chip 440 may be configured to modulate the bias current according to the magnitude of the control voltage output from the lookup table when the current optical power is greater than the second limit threshold.

[0123] The control chip 440 may be configured to: when the current optical power is greater than the second limit threshold, output a control voltage according to the target optical power value and modulate the bias current.

[0124] For the convenience of description, the compensation current when the current optical power is greater than the second limit threshold, that is, when the optical emission chip is not degraded, is defined as the normal bias current.

[0125] In some embodiments, the optical transmitter chip can use a lookup table to output a bias current to compensate for the optical power of the optical transmitter chip. When the optical power continuously falls below a second limit threshold, an optical power alarm signal is output, and the voltage output to the control chip 440 is set to the second bias current. This allows the degraded optical transmitter chip to transmit again, extending the lifecycle of the optical module.

[0126] Degradation is detected by recording degradation counts. If the count exceeds a threshold, the degradation state is determined to be stable. The bias current is adjusted upward within a certain range to return the transmitted optical power to normal.

[0127] In some embodiments, the control chip 440 may be configured to obtain a calibration value and compare the calibration value with a preset calibration coefficient. If the calibration value is different from the preset calibration coefficient, it indicates that the optical module has been calibrated for transmit optical power, and the next step is performed.

[0128] If the calibration value is the same as the preset calibration coefficient, the optical module has not been calibrated for transmit optical power, and the degradation counter is reset to 0. After the optical module is calibrated, the calibration value is stored in the preset location.

[0129] In some embodiments, the transmitted optical power usually needs to be calibrated. Before the optical power is calibrated, the optical power of the module is inaccurate. Therefore, before the optical power is calibrated, the degradation count is reset to zero and no degradation judgment is performed.

[0130] In some embodiments, the control chip 440 may be configured to:

[0131] Get the calibration value. If the calibration value is the same as the preset calibration coefficient, the degradation count is reset to zero.

[0132] If the calibration value is different from the preset calibration coefficient and the current optical power is 0, the degradation count is reset;

[0133] If the calibration value is different from the preset calibration coefficient, the current optical power is greater than the second limit threshold, and the output bias current is not the second bias current, the degradation count is reset;

[0134] If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to the second limit threshold, the degradation count is incremented by 1.

[0135] When the degradation count is greater than or equal to a preset value, the output is a second bias current.

[0136] After the emission optical power is calibrated and the number of times the continuous optical power is less than or equal to the second limit threshold reaches a preset value, the control chip 440 compensates for the degradation of the optical emission chip to extend the life cycle of the optical module.

[0137] In some embodiments, degradation determination of a transmitting chip is generally related to module characteristics, and a low power warning threshold may be used as a degradation determination threshold.

[0138] In some embodiments, the calibration value is different from the preset calibration coefficient, the current optical power is greater than the second limit threshold, and the output bias current is not the second bias current, indicating that the optical module has been calibrated. The current optical power is greater than the second limit threshold, and the output bias current is not the second bias current, indicating that degradation compensation has not been performed and the optical emission chip has not degraded.

[0139] Figure 7Schematic diagram of a method for controlling the transmitted optical power according to some embodiments of the present disclosure. In some embodiments, a method for controlling the transmitted optical power of an optical module is also provided, such as Figure 7 As shown, the method for controlling the transmitted optical power may include: S100: obtaining a calibration value. The transmitted optical power usually needs to be calibrated, and the calibration value is stored in a preset location.

[0140] The method for controlling transmitted optical power may include: S200: Obtaining current optical power and current bias current. The current optical power is the optical power of the optical emitting component detected by the photodetector. The control chip 440 may convert the electrical signal from the photodetector into an analog value. The control chip 440 may also obtain the bias current of the control chip 440.

[0141] The method for controlling the transmitted optical power may include: S300: the calibration value is the same as the preset calibration coefficient, and the degradation count is cleared. If the calibration value is the same as the preset calibration coefficient, it means that the optical module has not been calibrated for the transmitted optical power, and the degradation count is cleared.

[0142] The method for controlling transmitted optical power may include: S400: when the calibration value differs from a preset calibration coefficient and the current optical power is 0, a degradation counter is reset. The current optical power being 0 indicates an interruption or light shutoff during signal transmission, but the performance of the optical transmitter chip in the optical module is not necessarily degraded, and degradation compensation is not required.

[0143] The method for controlling transmitted optical power may include: S500: if the calibration value differs from a preset calibration coefficient, the current optical power is greater than a second limit threshold, and the output bias current is not the second bias current, the degradation count is cleared. If the current optical power is not zero, the current optical power is greater than the second limit threshold, and the output bias current is not the second bias current, the degradation count is cleared, and records of non-continuous degradation states are cleared.

[0144] The method for controlling the transmitted optical power may include: S600: if the calibration value is different from a preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to a second limit threshold, the degradation count is increased by 1.

[0145] In some embodiments, if the calibration value is different from the preset calibration coefficient, the current optical power is not 0, the current optical power is greater than the second limit threshold, and the bias current is the second bias current, the degradation count is incremented by 1. The degradation count is continuously incremented during the degradation compensation period.

[0146] The method for controlling transmitted optical power may include: S700: When the degradation count is greater than or equal to a preset value, setting the bias current to a second bias current. After the transmitted optical power is calibrated and the number of times the optical power is continuously less than or equal to the second limit threshold reaches a preset value, the control chip 440 performs degradation compensation on the optical transmitter chip to extend the lifecycle of the optical module.

[0147] In some embodiments, when the degradation count is greater than or equal to a preset value, the magnitude of the bias current may be controlled according to a degradation compensation table.

[0148] For example, the bias current in the degradation compensation table includes: a second bias current and a normal compensation current value.

[0149] When the degradation count is greater than or equal to a preset value, the output bias current is the sum of the second bias current and the normal compensation current value.

[0150] In some embodiments, when the degradation count is greater than or equal to a preset value, the current temperature value is obtained, and the conventional compensation current value corresponding to the current temperature value is searched according to the lookup table, and the output bias current is the sum of the second bias current and the conventional compensation current value.

[0151] The method for controlling transmitted optical power may include: S800: if the calibration value is different from the preset calibration coefficient and the current optical power is greater than the second limit threshold, compensating the optical power according to the lookup table. Compensating the optical power according to the lookup table may include adjusting the bias current according to the lookup table.

[0152] In some embodiments, the bias current corresponding to the second bias current is greater than the operating current of the light emitting chip.

[0153] In some embodiments, the method for controlling the transmitted optical power may include: S900: outputting an optical power alarm signal if the calibration value is different from a preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to a second limit threshold.

[0154] Some embodiments of the present application can maintain the transmitted optical power of the optical module within a certain range during normal use. When degradation occurs, the optical power will drop, and an alarm or warning will be reported. By increasing the bias current, degradation compensation is performed after the degradation state continues to a preset value, thereby extending the life cycle of the optical module.

[0155] In some embodiments, the preset value may be 100. The preset value may be 200. The preset value may be 300. The preset value may be any natural number greater than 2, and may be set according to actual needs.

[0156] Figure 8 A method for controlling the transmitted optical power according to some embodiments of the present disclosure is provided. Figure 1 .like Figure 8 As shown, the method for controlling transmitted optical power may include: S200: Obtaining current optical power and bias current. The current optical power is the optical power of the optical emitting component detected by the photodetector. The control chip 440 may convert the electrical signal of the photodetector into an analog value. The control chip 440 may also obtain the bias current of the control chip 440.

[0157] The control method for transmitting optical power may include: T400: Current optical power is 0, and degradation counter is cleared. The current optical power of 0 indicates that there is an interruption or light shutoff during signal transmission, but the performance of the optical transmitter chip in the optical module is not necessarily degraded at this time, and degradation compensation is not required in this case.

[0158] The method for controlling the transmitted optical power may include: T500: if the current optical power is not zero, the current optical power is greater than the second limit threshold, and the bias current is not the second bias current, the degradation count is cleared. If the current optical power is not zero, the current optical power is greater than the second limit threshold, and the bias current is not the second bias current, the degradation count is cleared, and records of non-continuous degradation states are cleared.

[0159] The method for controlling the transmitted optical power may include: T600: the current optical power is not 0, the current optical power is less than or equal to the second limit threshold, the bias current is the second bias current, and the degradation count is increased by 1.

[0160] The method for controlling transmitted optical power may include: S700: When the degradation count is greater than or equal to a preset value, setting the bias current to a second bias current. After the transmitted optical power is calibrated and the number of times the optical power is continuously less than or equal to the second limit threshold reaches a preset value, the control chip 440 performs degradation compensation on the optical transmitter chip to extend the lifecycle of the optical module.

[0161] The method for controlling the transmitted optical power may include: T800: if the current optical power is greater than or equal to a first limit threshold, the optical power is compensated according to a lookup table.

[0162] In some embodiments, the first limit threshold is greater than the second limit threshold. The bias current corresponding to the second bias current is greater than the operating current of the light emitting chip.

[0163] In some embodiments, the method for controlling the transmitted optical power may include: T900: if the current optical power is not 0 and the current optical power is less than or equal to a second limit threshold, an optical power alarm signal is output.

[0164] Some embodiments of the present application can maintain the transmitted optical power of the optical module within a certain range during normal use. When degradation occurs, the optical power will drop, and the module will report an alarm or warning; and by increasing the bias current, degradation compensation is performed after the degradation state continues for a preset value, thereby extending the life cycle of the optical module.

[0165] Figure 9 A method for controlling the transmitted optical power according to some embodiments of the present disclosure is provided. Figure 2 .like Figure 9As shown, in some embodiments, the method for controlling the transmitted optical power may include: T100: when the current optical power is greater than or equal to the first limit threshold and the current optical power is not equal to the target optical power, adjusting the bias current to make the current optical power equal to the target optical power.

[0166] In the embodiment of the present application, the current optical power is compared with the target optical power. When the current optical power is greater than the target optical power, the bias current is increased; when the current optical power is less than the target optical power, the bias current is reduced; when the current optical power is equal to the target optical power, the bias current remains unchanged.

[0167] The control chip 440 may adjust the bias current according to the target optical power so that the current optical power is equal to the target optical power.

[0168] Figure 10 A method for controlling the transmitted optical power according to some embodiments of the present disclosure is provided. Figure 3 .like Figure 10 As shown, in some embodiments, the method for controlling the transmitted optical power may include: S100: obtaining a calibration value. The transmitted optical power usually needs to be calibrated, and the calibration value is stored in a preset location.

[0169] The method for controlling transmitted optical power may include: S200: obtaining current optical power and bias current. The current optical power is the optical power of the optical emitting component detected by the photodetector. The control chip 440 may convert the electrical signal from the photodetector into an analog value. The control chip 440 may also obtain the bias current of the control chip 440.

[0170] The method for controlling the transmitted optical power may include: S300: the calibration value is the same as the preset calibration coefficient, and the degradation count is cleared. If the calibration value is the same as the preset calibration coefficient, it means that the optical module has not been calibrated for the transmitted optical power, and the degradation count is cleared.

[0171] The method for controlling transmitted optical power may include: S400: when the calibration value differs from a preset calibration coefficient and the current optical power is 0, a degradation counter is reset. The current optical power being 0 indicates an interruption or light shutoff during signal transmission, but the performance of the optical transmitter chip in the optical module is not necessarily degraded, and degradation compensation is not required.

[0172] The method for controlling transmitted optical power may include: S500: if the calibration value differs from a preset calibration coefficient, the current optical power is greater than a second limit threshold, and the bias current is not the second bias current, the degradation count is reset. If the current optical power is greater than the second limit threshold, the bias current is not the second bias current, the degradation count is reset, and records of non-continuous degradation states are cleared.

[0173] The method for controlling the transmitted optical power may include: S600: if the calibration value is different from the preset calibration coefficient and the current optical power is less than or equal to the second limit threshold, the degradation count is increased by 1.

[0174] In some embodiments, the bias current being the second bias current indicates that degradation compensation has been performed, and degradation counting is no longer required, and the system remains in a degradation compensation state.

[0175] In some embodiments, when the degradation count is equal to a preset value, the bias current is modified to a second bias current. After the degradation count is equal to the preset value, the control chip controls the bias current to be the second bias current.

[0176] In some embodiments, when the degradation count is equal to a preset value, the bias current is modified to a second bias current. After the degradation count is equal to the preset value, the control chip controls the bias current to be the sum of the second bias current and a normal compensation current value.

[0177] The method for controlling transmitted optical power may include: S700: When the degradation count is greater than or equal to a preset value, setting the bias current to a second bias current. After the transmitted optical power is calibrated and the number of times the optical power is continuously less than or equal to the second limit threshold reaches a preset value, the control chip 440 performs degradation compensation on the optical transmitter chip to extend the lifecycle of the optical module.

[0178] The control method for the transmitted optical power may include: A800: the calibration value is different from the preset calibration coefficient, the current optical power is greater than or equal to the first limit threshold, the current optical power is not equal to the target optical power, and the bias current is adjusted to make the current optical power equal to the target optical power.

[0179] In some embodiments, the first limit threshold is greater than the second limit threshold. The bias current corresponding to the second bias current is greater than the operating current of the light emitting chip.

[0180] In some embodiments, the method for controlling the transmitted optical power may include: S900: outputting an optical power alarm signal if the calibration value is different from a preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to a second limit threshold.

[0181] Some embodiments of the present application can maintain the transmitted optical power of the optical module within a certain range during normal use. When degradation occurs, the optical power will drop, and an alarm or warning will be reported. By increasing the bias current, degradation compensation is performed after the degradation state continues to a preset value, thereby extending the life cycle of the optical module.

[0182] Since the above embodiments are all described by reference in combination with other embodiments, different embodiments have the same parts, and the same and similar parts between the various embodiments in this specification can be referred to each other. No further detailed explanation is given here.

[0183] It should be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a circuit structure, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such circuit structure, article or device. In the absence of further restrictions, the presence of an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the circuit structure, article or device comprising the element.

[0184] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure of this application. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present application are indicated by the claims.

[0185] The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. An optical module, characterized in that: include: an optical transmitter chip configured to transmit an optical signal; a photodetector configured to convert the optical power of the emitted optical signal into an electrical signal; A control chip connected to the photodetector and the light emitting chip; The control chip is configured as follows: Converting the electrical signal into current optical power; The current optical power is 0, and the degradation count is reset; If the current optical power is not 0, the current optical power is greater than the second limit threshold, and the output bias current is not the second bias current, the degradation count is cleared. If the current optical power is not 0 and is less than or equal to the second limit threshold, the degradation count is incremented by 1. When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current, and the second bias current is greater than the operating current of the light emitting chip; If the current optical power is not 0 and is less than or equal to the second limit threshold, an optical power alarm signal is output.

2. The optical module according to claim 1, wherein The control chip is configured as follows: If the current optical power is greater than or equal to a first limit threshold, the bias current is adjusted according to the lookup table; The first limit threshold is greater than the second limit threshold.

3. The optical module according to claim 1, wherein: The control chip is configured to: when the current optical power is a first limit threshold, the bias current is a first bias current; When the current optical power is less than or equal to the second limit threshold, the bias current is the second bias current; The second bias current is 10 to 20 times the first bias current.

4. An optical module, characterized in that: include: an optical transmitter chip configured to transmit an optical signal; a photodetector configured to convert the optical power of the emitted optical signal into an electrical signal; A control chip connected to the photodetector and the light emitting chip; The control chip is configured as follows: Converting the electrical signal into current optical power; The calibration value is the same as the preset calibration coefficient, and the degradation count is reset to zero; If the calibration value is different from the preset calibration coefficient and the current optical power is 0, the degradation count is reset; If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, the current optical power is greater than the second limit threshold, or the output bias current is not the second bias current, the degradation count is reset. If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to the second limit threshold, the degradation count is incremented by 1. When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current, and the second bias current is greater than the operating current of the light emitting chip; If the calibration value is different from the preset calibration coefficient and the current optical power is greater than or equal to the first limit threshold, the bias current is adjusted according to the lookup table; The first limit threshold is greater than the second limit threshold.

5. The optical module according to claim 4, wherein: The control chip is configured to output an optical power alarm signal when the calibration value is different from a preset calibration coefficient, the current optical power is not 0, and the current optical power is less than or equal to a second limit threshold.

6. An optical module, characterized in that: include: an optical transmitter chip configured to transmit an optical signal; a photodetector configured to convert the optical power of the emitted optical signal into an electrical signal; A control chip connected to the photodetector and the light emitting chip; The control chip is configured as follows: Converting the electrical signal into current optical power; The current optical power is 0, and the degradation count is reset to zero; If the current optical power is greater than the second limit threshold and the output bias current is not the second bias current, the degradation count is reset. If the current optical power is not 0 and is less than or equal to the second limit threshold, the degradation count is incremented by 1. When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current; If the current optical power is not 0 and is less than or equal to the second limit threshold, an optical power alarm signal is output; The current optical power is greater than or equal to the first limit threshold, and the bias current is adjusted to make the optical power of the light emitting chip reach the target optical power.

7. The optical module according to claim 6, wherein: The control chip is configured as follows: If the calibration value is different from the preset calibration coefficient and the current optical power is greater than or equal to the first limit threshold, the bias current is adjusted according to the lookup table; The first limit threshold is greater than the second limit threshold.

8. The optical module according to claim 6, wherein: The control chip is configured to: when the current optical power is a first limit threshold, the bias current is a first bias current; When the current optical power is less than or equal to the second limit threshold, the bias current is the second bias current; The second bias current is 10 to 20 times the first bias current.

9. An optical module, characterized in that: include: an optical transmitter chip configured to transmit an optical signal; a photodetector configured to convert the optical power of the emitted optical signal into an electrical signal; A control chip connected to the photodetector and the light emitting chip The control chip is configured as follows: Converting the electrical signal into current optical power; The calibration value is the same as the preset calibration coefficient, and the degradation count is reset to zero; If the calibration value is different from the preset calibration coefficient and the current optical power is 0, the degradation count is reset; If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, the current optical power is greater than the second limit threshold, or the output bias current is not the second bias current, the degradation count is reset. If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to the second limit threshold, the degradation count is incremented by 1. When the degradation count is greater than or equal to a preset value, the bias current is set to a second bias current, wherein the second bias current makes the bias current greater than an operating current of the light emitting chip; If the calibration value is different from the preset calibration coefficient, the current optical power is not 0, or the current optical power is less than or equal to the second limit threshold, an optical power alarm signal is output; The current optical power is greater than or equal to the first limit threshold, and the bias current is adjusted to make the optical power of the light emitting chip reach the target optical power.

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