Optical module

Abstract

The embodiment of the invention discloses an optical module, comprising a gold finger, a laser drive chip, a laser and a variable resistor. The gold finger is equipped with a signal interface and is used for outputting a current signal. The laser drive chip is equipped with a signal receiving end and a drive signal output end. The signal receiving end is connected with the signal interface. The drive signal output end is connected with the laser and is used for driving the laser to transmit an optical signal. The signal receiving end and one end of the variable resistor are connected with the signal interface. The other end of the variable resistor is grounded. When the duty cycle of the current single is overhigh, the variable resistor is adjusted, the resistance value of the variable resistor is reduced, the current input to the laser drive chip is reduced, a voltage signal amplitude is reduced, a high level part in the voltage signal is pulled down, the duty cycle is reduced, and an intersection in an optical eye diagram moves towards the middle position of the optical eye diagram. When the duty cycle of the input electric signal is changed, other resistance and capacitance in the optical module are not modified, so that jitter of the optical eye diagram is not influenced.

Description

technical field [0001] Embodiments of the present invention relate to the field of optical communications, and in particular, to an optical module. Background technique [0002] In the field of optical communication, an optical module is a device that realizes photoelectric conversion. The optical module transmits the converted optical signal to the receiving end through the optical fiber. If the quality of the optical signal transmitted by the optical module is poor, the probability of bit errors or data loss at the receiving end will increase. Therefore, in actual engineering, in order to confirm the quality of the optical signal emitted by the optical module, the quality of the optical signal will be tested. [0003] The current optical signal detection method usually uses a bit error detector to simulate the actual application environment, converts the electrical signal generated by the bit error detector into an optical signal through an optical module, and inputs the...

AI Technical Summary

Problems solved by technology

Since the jitter of the optical eye diagram is associated with the internal resistance and capacitance of the optical module, forcibly modifying the internal resistance and capacitance of the optical module will cause the jitter of the optical eye diagram in the optical module to increase

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