Single module bi-directional optical transmitting and receiving system

Patent metadata

Field	Value
Publication number	US-9906301-B2
Application number	US-201615209399-A
Country	US
Kind code	B2
Filing date	Jul 13, 2016
Priority date	Nov 4, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

Provided herein is a single module bi-directional optical transmitting and receiving system including a transmitter transmitting an optical signal by converting a down-signal, and obtaining an up-signal by converting y the optical signal that is received, and a receiver transmitting the optical signal by converting the up-signal, and obtaining the down-signal by converting the optical signal that is received, wherein the transmitter and the receiver include a single optical transmitting module including a monitor receiving module, transmit the optical signal through the single optical transmitting module, and receive the optical signal through the monitor receiving module.

First claim

What is claimed is:

1. A single module bi-directional optical transmitting and receiving system, comprising:
a transmitter transmitting an optical down-signal by converting an input down-signal, and obtaining an up-signal by converting an optical up-signal that is received; and
a receiver transmitting the optical up-signal by converting an input up-signal, and obtaining a down-signal by converting the optical down-signal that is received,
wherein the transmitter and the receiver include a single optical transmitting module including a monitor receiving module, transmit the optical signal through the single optical transmitting module, and receive the optical signal through the monitor receiving module;
wherein the transmitter further includes
a multiplier converting a frequency by calculating an electrical signal corresponding to the down-signal and a predetermined frequency signal; and
a driver converting an electrical signal including the frequency that is converted into the optical signal, wherein the single optical transmitting module transmits the optical signal that is converted and output from the driver.

2. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the optical transmitting module is one of a vertical cavity surface emitting laser (VCSEL), a fabrey perot laser diode (FP-LD), a reflective semiconductor optical amplifier (RSOA), and a distributed feedback laser diode (DFB-LD).

3. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the monitor receiving module is a monitor photo diode (mPD).

4. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the transmitter and the receiver further comprise a driver converting an electrical signal corresponding to the input down-signal or the input up-signal into the corresponding optical signal, wherein the single optical transmitting module transmits the corresponding optical signal that is converted and output from the driver.

5. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the transmitter and the receiver further comprise:
a trans impedance amplifier (TIA) amplifying the corresponding optical signal received through the monitor receiving module and converting the corresponding optical signal to a voltage signal; and
a limiting amplifier (LA) converting the voltage signal converted in the TIA into a digital signal.

6. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the transmitter and the receiver further comprise a switch for alternately controlling transmission of the corresponding optical signal and reception of the corresponding optical signal.

7. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the transmitter further comprises:
a TIA amplifying the optical signal received through the monitor receiving module and converting the optical signal into a voltage signal;
a filter filtering the voltage signal converted in the TIA to a predetermined frequency band for the up-signal; and
a LA converting the voltage signal that is filtered to a digital signal.

8. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the receiver comprises:
a TIA amplifying the optical signal received through the monitor receiving module and converting the optical signal into a voltage signal;
a first filter filtering the voltage signal converted in the TIA to a predetermined frequency band for the down-signal;
the multiplier converting the frequency by calculating the voltage signal that is filtered in the first filter and the predetermined frequency signal;
a second filter filtering the voltage signal including the frequency that is converted; and
a LA converting the voltage signal that is filtered in the second filter into a digital signal.

9. The single module bi-directional optical transmitting and receiving system according to claim 1 , wherein the transmitter and the receiver further comprise a cross-spectrum calculating unit removing noise by applying cross-spectrum with respect to the optical signal received through the monitor receiving module and the optical signal received through the single optical transmitting module.

10. The single module bi-directional optical transmitting and receiving system according to claim 9 , wherein the transmitter and the receiver comprise:
a TIA amplifying the optical signal received through the monitor receiving module and converting the optical signal into a voltage signal;
a first LA converting the voltage signal converted in the TIA into a digital signal; and
a second LA converting the optical signal received through the single optical transmitting module into the digital signal,
wherein the cross-spectrum calculating unit applies the cross spectrum with respect to the digital signal that is converted in the first LS and the second LA.

11. The single module bi-directional optical transmitting and receiving system according to claim 9 , wherein the transmitter comprises:
a TIA amplifying the optical signal received through the monitor receiving module and converting the optical signal into the voltage signal;
a first filter filtering the voltage signal converted in the TIA to a predetermined frequency band for the up-signal;
a first LA converting the voltage signal filtered in the first filter into a digital signal;
a second filter filtering the optical signal received through the single optical transmitting module to the predetermined frequency band for the up-signal; and
a second LA converting the optical signal filtered in the second filter into the digital signal,
wherein the cross-spectrum calculating unit applies the cross-spectrum with respect to the digital signal converted in the first LA and the second LA.

12. The single module bi-directional optical transmitting and receiving system according to claim 10 , wherein the receiver comprises:
the TIA amplifying the optical signal received through the monitor receiving module and converting the optical signal into the voltage signal;
a first filter filtering the voltage signal converted in the TIA to a predetermined frequency band for the down-signal;
a first multiplier converting a frequency by calculating the voltage signal filtered in the first filter and a predetermined frequency signal;
a second filter filtering the voltage signal including the frequency that is converted in the first multiplier;
the first LA converting the voltage signal filtered in the second filter to the digital signal;
a third filter filtering the optical signal received through the single optical transmitting module to the predetermined frequency band for the down-signal;
a second multiplier converting the frequency by calculating the optical signal filtered in the third filter with the predetermined frequency signal;
a fourth filter filtering the optical signal including the frequency is converted in the second multiplier; and
the second LA converting the optical signal filtered in the fourth filter into the digital signal,
wherein the cross-spectrum calculating unit applies the cross-spectrum with respect to the digital signal converted in the first LA and the second LA.

13. The single module bi-directional optical transmitting and receiving system according to claim 1 , further comprising an optical fiber connecting the transmitter to the receiver.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Jung Soo Yong
• Lee Jong Jin
• Kang Hyun Seo
• Lee Sei Hyoung
• Kim Hee Seung

Classifications

• H04B10/43 Primary

  using a single component as both light source and receiver, e.g. using a photoemitter as a photoreceiver · CPC title

• H04B10/2589 Primary

  Bidirectional transmission · CPC title

• H04B10/503

  Laser transmitters · CPC title

• H04B10/40

  Transceivers · CPC title

• H04B10/2503 Primary

  Electricity · mapped topic