Receiver optical sub-assembly, bi-directional optical sub-assembly, optical module, and optical network device

A bi-directional optical sub-assembly comprising a receiver optical sub-assembly, wherein the receiver optical sub-assembly comprises a photodiode, a trans-impedance amplifier, a first filter component, and a second filter component, wherein:

• the photodiode is configured to convert an optical signal into an electrical signal, a positive electrode of the photodiode is connected to an input terminal of the trans-impedance amplifier, and a negative electrode of the photodiode is connected to a first power supply;
• the trans-impedance amplifier is configured to amplify the electrical signal output by the photodiode, a power terminal of the trans-impedance amplifier is connected to a second power supply, and a first ground terminal of the trans-impedance amplifier is connected to an external ground;
• a second ground terminal of the trans-impedance amplifier is connected to the external ground by using the first filter component;
• and
• a first terminal of the second filter component is connected to the negative electrode of the photodiode, and a second terminal of the second filter component is connected to the first terminal of the first filter component.

An optical sub-assembly comprising a bi-directional optical sub-assembly, wherein the bi-directional optical sub-assembly comprises a receiver optical sub-assembly, wherein the receiver optical sub-assembly comprises a photodiode, a trans-impedance amplifier, a first filter component, and a second filter component, wherein:

• the photodiode is configured to convert an optical signal into an electrical signal, a positive electrode of the photodiode is connected to an input terminal of the trans-impedance amplifier, and a negative electrode of the photodiode is connected to a first power supply;
• the trans-impedance amplifier is configured to amplify the electrical signal output by the photodiode, a power terminal of the trans-impedance amplifier is connected to a second power supply, and a first ground terminal of the trans-impedance amplifier is connected to an external ground;
• a second ground terminal of the trans-impedance amplifier is connected to the external ground by using the first filter component;
• and
• a first terminal of the second filter component is connected to the negative electrode of the photodiode, and a second terminal of the second filter component is connected to the first terminal of the first filter component.

An optical network device comprising an optical sub-assembly, wherein the optical sub-assembly comprises a bi-directional optical sub-assembly, wherein the bi-directional optical sub-assembly comprises a receiver optical sub-assembly, wherein the receiver optical sub-assembly comprises a photodiode, a trans-impedance amplifier, a first filter component, and a second filter component, wherein:

• the photodiode is configured to convert an optical signal into an electrical signal, a positive electrode of the photodiode is connected to an input terminal of the trans-impedance amplifier, and a negative electrode of the photodiode is connected to a first power supply;
• the trans-impedance amplifier is configured to amplify the electrical signal output by the photodiode, a power terminal of the trans-impedance amplifier is connected to a second power supply, and a first ground terminal of the trans-impedance amplifier is connected to an external ground;
• a second ground terminal of the trans-impedance amplifier is connected to the external ground by using the first filter component;
• and
• a first terminal of the second filter component is connected to the negative electrode of the photodiode, and a second terminal of the second filter component is connected to the first terminal of the first filter component.