CN-121984588-A - Optical module

CN121984588ACN 121984588 ACN121984588 ACN 121984588ACN-121984588-A

Abstract

The optical module provided by the disclosure comprises a circuit board, a CDR chip, a laser driving chip, a laser chip and an MCU. The laser driving chip internally comprises a first register and a second register. The first register stores a register value, and the register value in the first register is used for representing the working state of the CDR chip. And when the MCU responds to the register value which is used for representing that the CDR chip is in the unlocking state in the first register, writing the register value into a second register value, wherein the register value in the second register is used for adjusting the output of the laser driving chip to the CDR chip. The laser driving chip responds to the register value in the second register and outputs a control instruction to the CDR chip, so that the phase of a clock signal output by the CDR chip is adjusted until the phase of the clock signal output by the CDR chip and the phase of an electric signal input to the CDR chip accord with a preset relation, locking and recovering of the electric signal are achieved, and the CDR chip is adjusted to be in a locking state.

Inventors

WU TANGMENG
LIU SHU
LI ZHENDONG
SHI LIANG

Assignees

广东海信宽带科技有限公司

Dates

Publication Date: 20260505
Application Date: 20241030

Claims (10)

1. An optical module, comprising: The surface of the circuit board is provided with a golden finger; The CDR chip is electrically connected with the circuit board and is configured to receive the electric signals output by the golden finger and output clock signals and data signals; the laser driving chip is electrically connected with the CDR chip and is configured to receive data signals output by the CDR chip and convert the data signals into driving signals, and the laser driving chip comprises: The first register is electrically connected with the CDR chip, and a register value is stored in the first register and used for representing the working state of the CDR chip, wherein the working state comprises a locking state or an unlocking state; A second register electrically connected to the CDR chip; the laser chip is electrically connected with the laser driving chip and is configured to receive a driving signal output by the laser driving chip and convert the driving signal into an optical signal; and an MCU electrically connected with the laser driving chip and configured to: reading a register value in the first register; When the first register is a register value representing that the CDR chip is in an unlocking state, writing the register value into the second register, wherein the register value in the second register is used for adjusting the output of the laser driving chip to the CDR chip so as to enable the phase of a clock signal output by the CDR chip and the phase of an electric signal input to the CDR chip to accord with a preset relation.
2. The optical module of claim 1, wherein the laser driver chip is configured to: And responding to the register value in the second register, outputting a control instruction to the CDR chip so as to adjust the phase of the clock signal output by the CDR chip and enable the phase of the clock signal output by the CDR chip and the phase of the electric signal input to the CDR chip to accord with a preset relation.
3. The optical module of claim 1, wherein the CDR chip comprises: the phase comparator is electrically connected with the golden finger and is used for receiving the electric signal output by the golden finger and comparing the phase difference between the electric signal output by the golden finger and the clock signal output by the CDR chip so as to generate a control signal corresponding to the phase difference; The charge pump is electrically connected with the phase comparator and is used for generating a current signal according to the control signal; The loop filter capacitor is electrically connected with the charge pump and is used for receiving a current signal output by the charge pump and converting the current signal into a voltage signal; The voltage-controlled oscillator is electrically connected with the loop filter capacitor and is used for adjusting the frequency and the phase of the output electric signal according to the voltage signal so as to generate a clock signal.
4. The optical module of claim 2, wherein the CDR chip includes a charge pump, and wherein the laser driver chip outputs a control command to the charge pump in response to a register value in the second register to adjust a switching frequency of the charge pump, thereby adjusting a current signal output by the charge pump until a phase of a clock signal output by the CDR chip and a phase of an electrical signal input to the CDR chip satisfy a predetermined relationship.
5. The optical module of claim 1, wherein the CDR chip is configured to: The CDR chip internally generates a reference clock signal, and the phase of the reference clock signal has a preset relation with the phase of an electric signal input to the CDR chip; judging whether the phase of the reference clock signal and the phase of the clock signal accord with a preset relation or not; If the phase of the reference clock signal and the phase of the clock signal do not accord with a preset relation, writing a first register value into the first register, wherein the first register value is used for representing that the CDR chip is in an unlocking state; If the phase of the reference clock signal and the phase of the clock signal accord with a preset relation, writing a second register value into the first register, wherein the second register value is used for representing that the CDR chip is in a locking state.
6. An optical module, comprising: The surface of the circuit board is provided with a golden finger; The matching chip is electrically connected with the circuit board, and the matching chip comprises: The CDR chip is electrically connected with the circuit board and is configured to receive the electric signal output by the golden finger and output a clock signal and a data signal, and the CDR chip comprises a charge pump which is configured to generate a current signal which can be used for adjusting the phase of the clock signal output by the CDR chip; the laser driving chip is electrically connected with the CDR chip and is configured to receive data signals output by the CDR chip and convert the data signals into driving signals, and the laser driving chip comprises: The first register is electrically connected with the CDR chip, and a register value is stored in the first register and used for representing the working state of the CDR chip, wherein the working state comprises a locking state or an unlocking state; a second register electrically connected to the charge pump; the laser chip is electrically connected with the laser driving chip and is configured to receive a driving signal output by the laser driving chip and convert the driving signal into an optical signal; and an MCU electrically connected with the laser driving chip and configured to: when the first register is a register value representing that the CDR chip is in an unlocking state, writing the register value into the second register, wherein the register value in the second register is used for adjusting the output of the laser driving chip to the charge pump so as to adjust a current signal output by the charge pump, and therefore the phase of a clock signal output by the CDR chip and the phase of an electric signal input to the CDR chip accord with a preset relation.
7. The optical module of claim 6, wherein the laser driver chip is configured to: And responding to a register value in the second register, outputting a control instruction to the charge pump so as to adjust the switching frequency of the charge pump, and further adjusting a current signal output by the charge pump until the phase of a clock signal output by the CDR chip and the phase of an electric signal input to the CDR chip accord with a preset relation.
8. The optical module of claim 6, wherein the CDR chip is configured to: The method comprises the steps of generating a reference clock signal in the CDR chip, wherein the phase of the reference clock signal has a preset relation with the phase of an electric signal input to the CDR chip; If the phase of the reference clock signal and the phase of the clock signal do not accord with a preset relation, writing a first register value into the first register to represent that the CDR chip is in an unlocking state; If the phase of the reference clock signal and the phase of the clock signal accord with a preset relation, writing a second register value into the first register to represent that the CDR chip is in a locking state.
9. The optical module of claim 6, wherein the CDR chip comprises: the phase comparator is electrically connected with the golden finger and is used for receiving the electric signal output by the golden finger and comparing the phase difference between the electric signal output by the golden finger and the clock signal output by the CDR chip so as to generate a control signal corresponding to the phase difference; the charge pump is electrically connected with the phase comparator and is used for generating a current signal according to the control signal; The loop filter capacitor is electrically connected with the charge pump and is used for receiving a current signal output by the charge pump and converting the current signal into a voltage signal; The voltage-controlled oscillator is electrically connected with the loop filter capacitor and is used for adjusting the frequency and the phase of the output electric signal according to the voltage signal so as to generate a clock signal.
10. The optical module of claim 9, wherein the clock signal generated by the CDR chip is split into two paths, one path is fed back to the phase comparator and the other path is transmitted to the laser driving chip.

Description

Optical module Technical Field The disclosure relates to the technical field of optical communication, and in particular relates to an optical module. Background With the development of new business and application modes such as cloud computing, mobile internet, video and the like, the progress of optical communication technology is becoming more important. In the development of optical communication technology, the optical module is required to be continuously improved in data transmission rate as one of key devices in optical communication equipment, so that photoelectric signal conversion can be realized. Disclosure of Invention The optical module provided by some embodiments can adjust the working state of the CDR chip, thereby ensuring the performance of the CDR chip. Some embodiments provide an optical module comprising: The surface of the circuit board is provided with a golden finger; The CDR chip is electrically connected with the circuit board and is configured to receive the electric signals output by the golden finger and output clock signals and data signals; the laser driving chip is electrically connected with the CDR chip and is configured to receive data signals output by the CDR chip and convert the data signals into driving signals, and the laser driving chip comprises: The first register is electrically connected with the CDR chip, and a register value is stored in the first register and used for representing the working state of the CDR chip, wherein the working state comprises a locking state or an unlocking state; A second register electrically connected to the CDR chip; the laser chip is electrically connected with the laser driving chip and is configured to receive a driving signal output by the laser driving chip and convert the driving signal into an optical signal; and an MCU electrically connected with the laser driving chip and configured to: reading a register value in the first register; When the first register is a register value representing that the CDR chip is in an unlocking state, writing the register value into the second register, wherein the register value in the second register is used for adjusting the output of the laser driving chip to the CDR chip so as to enable the phase of a clock signal output by the CDR chip and the phase of an electric signal input to the CDR chip to accord with a preset relation. The optical module has the following advantages or beneficial effects that the optical module comprises a circuit board, a CDR chip, a laser driving chip, a laser chip and an MCU. The CDR chip can extract a clock signal from the electric signal output by the golden finger and recover a data signal according to the clock signal. The data signals recovered by the CDR chip are transmitted to a laser driving chip, and the laser driving chip receives the data signals and converts the data signals into driving signals. The laser driving chip transmits the generated driving signal to the laser chip, and the laser chip converts the driving signal into an optical signal according to the received driving signal. The laser driving chip internally comprises a first register and a second register. The first register stores a register value, and the register value in the first register is used for representing the working state of the CDR chip, wherein the working state comprises that the CDR chip is in a locking state or the CDR chip is in an unlocking state. The second register is electrically connected with the CDR chip. And when the MCU responds to the register value which is used for representing that the CDR chip is in the unlocking state in the first register, writing the register value into a second register value, wherein the register value in the second register is used for adjusting the output of the laser driving chip to the CDR chip. The laser driving chip responds to the register value in the second register and outputs a control instruction to the CDR chip, so that the phase of the clock signal output by the CDR chip is adjusted until the phase of the clock signal output by the CDR chip and the phase of the electric signal input to the CDR chip accord with a preset relation, locking and recovering of the electric signal are achieved, and the CDR chip is adjusted to be in a locking state. In some embodiments, the laser driver chip is configured to: And responding to the register value in the second register, outputting a control instruction to the CDR chip so as to adjust the phase of the clock signal output by the CDR chip and enable the phase of the clock signal output by the CDR chip and the phase of the electric signal input to the CDR chip to accord with a preset relation. The technical scheme has the advantages that the laser driving chip responds to the register value in the second register and adjusts the control instruction output to the CDR chip. The CDR chip responds to the received control instruction, an internal mechanism is adjusted, and then the p