Optical module

Abstract

The invention provides an optical module comprising a circuit board provided with a laser driving chip; a tube socket; the pin is arranged on the tube seat; comprising a cathode pin and an anode pin and is electrically connected with the laser driving chip; the ceramic substrate is arranged on the tube socket; the surface of the ceramic substrate comprises a negative electrode metal area, a positive electrode metal area and a chip metal area; a cathode is arranged at the bottom of the laser chip, an anode is arranged at the top of the laser chip, and the bottom of the laser chip is arranged on the surface of the chip metal area to realize electric connection between the cathode and the chip metal area; the anode is connected with the anode metal area through a wire; the positive electrode metal area is electrically connected with the positive electrode pin; the negative electrode metal region comprises a first conductive region, a first thin-film resistor and a second conductive region; the first thin-film resistor is communicated with the first conductive region and the second conductive region; the first conductive region is also electrically connected with the negative electrode pin; and the chip metal region is electrically connected with the first conductive region or the second conductive region through a wire so as to meet the impedance matching requirement of the chip.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to an optical module. Background technique [0002] Due to the higher and higher requirements for communication bandwidth in the field of optical fiber communication, the global optical communication is in a period of rapid development. In the field of high-speed data communication, in order to ensure long-distance and high-speed transmission of data, optical modules are usually used in the field to transmit and receive light of different wavelengths. [0003] The existing optical module usually refers to an integrated module for photoelectric conversion. For optical signal transmission, a laser chip is usually used to convert the electrical signal from the host computer into an optical signal. In order to provide a flat optical bearing surface for the laser chip, the laser chip is usually arranged on a ceramic substrate, the surface of the ceramic substrate...

AI Technical Summary

Problems solved by technology

Usually the output impedance of the laser driver chip is a fixed value, but the resistance of the laser is 5~10Ω, which is not a constant value. There will be a problem of poor impedance matching between the laser driver chip and the laser chip, which will affect the high frequency performance.

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