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Optical receiving circuit, optical receiver, optical terminating apparatus and optical communication system

A technology of optical receiving circuit and optical receiver, which is applied in the field of optical communication system, can solve problems such as the inability to reduce the influence of wiring inductance components, and achieve the effect of suppressing oscillation

Pending Publication Date: 2021-02-26
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is a problem that the influence of the inductance component of the wiring on the base substrate cannot be reduced even if the wiring can be made shorter.

Method used

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  • Optical receiving circuit, optical receiver, optical terminating apparatus and optical communication system
  • Optical receiving circuit, optical receiver, optical terminating apparatus and optical communication system
  • Optical receiving circuit, optical receiver, optical terminating apparatus and optical communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] figure 1 It is a diagram showing a configuration example of the optical communication system 10 according to Embodiment 1 of the present invention. The optical communication system 10 includes an OLT (Optical Line Terminal, Optical Line Terminal) 7 and an ONU (Optical Network Unit, Optical Network Unit) 8 . The optical communication system 10 is a system in which the OLT 7 and the ONU 8 communicate by transmitting and receiving optical signals through the transmission path 9 . The OLT 7 is an optical terminal installed on the side of a station (station) that provides services. The ONU 8 is an optical terminal installed in a home or the like that receives service provision. The transmission path 9 is a transmission path for transmitting and receiving optical signals, and is, for example, an optical fiber. In addition, in figure 1 In the illustrated optical communication system 10 , a case where the OLT 7 communicates with one ONU 8 is shown, but this is only an examp...

Embodiment approach 2

[0034] In Embodiment 2, a configuration in which the light receiving circuit 1 does not include the filter circuit 12 will be described.

[0035] Image 6 It is a diagram showing an example of the circuit configuration of the light receiving circuit 1 according to the second embodiment. The light receiving circuit 1 includes a light receiving element 11 , a base substrate 13 , and a capacitor 16 . The light receiving element 11 is mounted on a base substrate 13 . The anode pad 111 of the light receiving element 11 is connected to the input terminal 20 of the preamplifier 2 via the wiring 131 and the wire 41 on the base substrate 13 . The wiring 134 on the base substrate 13 is connected to the capacitor 16 via the wire 43 . The wiring 134 is a fourth wiring connected to the resistor 14 and the resistor 15 on the base substrate 13 . The resistor 15 is a second resistor element connected to the wiring 132 on the base substrate 13 . A filter circuit is configured by combining...

Embodiment approach 3

[0040] In Embodiment 3, a configuration different from Embodiment 2 in a case where the light receiving circuit 1 does not include the filter circuit 12 will be described.

[0041] Figure 8 It is a diagram showing an example of the circuit configuration of the light receiving circuit 1 according to the third embodiment. The light receiving circuit 1 includes a light receiving element 11 , a base substrate 13 , and a capacitor 16 . The light receiving element 11 is mounted on a base substrate 13 . The anode pad 111 of the light receiving element 11 is connected to the input terminal 20 of the preamplifier 2 via the wiring 131 and the wire 41 on the base substrate 13 . The wiring 135 on the base substrate 13 is connected to the capacitor 16 via the wire 43 . The wiring 135 is a fifth wiring connected to the three-terminal resistor 17 on the base substrate 13 . An external bias voltage is applied to the wiring 132 on the base substrate 13 . The bias voltage is applied to th...

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PUM

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Abstract

The present invention is provided with a light receiving element (11) which converts an optical signal into a current signal; a submount substrate (13) on which the light receiving element (11) is mounted; an interconnect (131) connected to an anode pad (111) of the light receiving element (11) and a wire (41) connected to a preamplifier (2) on the submount substrate (13); an interconnect (132) towhich a bias voltage is applied on the submount substrate (13); an interconnect (133) connected to a cathode pad (112) of the light receiving element (11) on the submount substrate (13); and a resistance (14) which is connected to the interconnect (133) on the submount substrate (13), and serves as a path when the bias voltage is applied to the light receiving element (11) via the interconnect (132). A resistance value of the resistance (14) is determined such that a peak of resonance between the preamplifier (2) and a ground is suppressed, and oscillation in the preamplifier (2) is suppressed.

Description

technical field [0001] The present invention relates to an optical receiving circuit, an optical receiver, an optical terminal device and an optical communication system for receiving optical signals. Background technique [0002] In an optical communication system, an optical terminal device that transmits and receives an optical signal includes an optical receiver that converts an optical signal into an electrical signal. The optical receiver includes: an optical receiving circuit, including a light-receiving element that converts an optical signal sent from a transmission path such as an optical fiber into a current signal; a preamplifier that converts the current signal into a voltage signal, a so-called electrical signal, and amplifies it; and A limiting amplifier amplifies an electrical signal and limits it to a desired amplitude. As a preamplifier, a negative feedback amplifier circuit in which a feedback resistor is inserted between the input and output of an invert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/69
CPCH04B10/69H05K1/181H05K2201/10121H05K2201/10022H05K2201/1006H05K2201/10166H03H7/06H04B10/60
Inventor 三田大介
Owner MITSUBISHI ELECTRIC CORP