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Optical Receivers and Optical Transmission Systems

An optical receiver and optical transmission technology, which is applied in the field of optical transmission systems, can solve the problems of large power loss and low output current amplitude, and achieve the effects of reducing noise, improving precision, and reducing noise components

Inactive Publication Date: 2011-12-21
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In communication from an optical transmitter (TX) to an optical receiver (RX), in some cases, the power loss at the connecting portion of the optical fiber and in the electrical / optical conversion and optical / electrical conversion is large, and the output of the PD current has a significantly lower amplitude

Method used

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  • Optical Receivers and Optical Transmission Systems
  • Optical Receivers and Optical Transmission Systems
  • Optical Receivers and Optical Transmission Systems

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0051] 1. First Embodiment (First Configuration Example of Optical Receiver)

[0052] 2. Second Embodiment (Second Configuration Example of Optical Receiver)

no. 3 example

[0053] 3. Third Embodiment (Third Configuration Example of Optical Receiver)

no. 4 example

[0054] 4. Fourth Embodiment (Fourth Configuration Example of Optical Receiver)

[0055] Figure 5 is a diagram showing a basic configuration of an optical transmission system according to an embodiment of the present invention.

[0056] This communication system 100 is configured with an optical signal transmitting device 200 , an optical signal receiving device 300 and an optical transmission line 400 .

[0057] The optical signal transmission device 200 includes an optical transmitter 210, and an electrical signal output from the transmitter 210 is converted into an optical signal by an electro-optical conversion element, LD, or VCSEL.

[0058] The optical signal is transmitted in the optical transmission line 400 formed of optical fibers, and undergoes photoelectric conversion performed by the PD of the optical receiver (RX) 310 of the optical signal receiving device 300 .

[0059] A specific description will be made below regarding the configuration and function of the o...

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Abstract

Disclosed herein is an optical receiver including: a light receiving element configured to have an anode and a cathode and generate a photocurrent dependent on received signal light; a current-voltage conversion circuit configured to be connected to the anode of the light receiving element and convert the photocurrent to a voltage signal; and a capacitive passive element configured to have a first electrode and a second electrode. The cathode of the light receiving element is connected to the first electrode of the capacitive passive element, and the second electrode of the capacitive passive element is connected to a reference potential of the current-voltage conversion circuit and the second electrode is not coupled to objects other than a reference potential terminal of the current-voltage conversion circuit.

Description

technical field [0001] The present invention relates to an optical receiver applied to an optical transmission system and an optical transmission system. Background technique [0002] Transimpedance amplifiers (TIAs) that convert current to voltage are used in optical transmission systems. [0003] The optical transmission system refers to a system in which data originating from optical conversion of electrical signals is transmitted from an optical transmitter (TX), and optical data received by an optical receiver (RX) is converted into electrical signals. [0004] A photodiode (PD) converts optical data transmitted from an optical transmitter (TX) into a current, and the current is converted into a differential voltage using a TIA. [0005] An electrical signal output from a driver of the optical transmitter (TX) is converted into an optical signal through a photoelectric conversion element, a laser diode (LD), or a vertical cavity surface emitting laser (VCSEL). The opt...

Claims

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Application Information

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IPC IPC(8): H04B10/06H04B10/24H04L25/02H04B10/40H01L31/10H04B10/50H04B10/60H04B10/69
CPCH04B10/6973
Inventor 森田宽铃木秀幸花冈克史近藤绚哉
Owner SONY CORP