Wavelength-division multiplexing device with a unified passband

Patent metadata

Field	Value
Publication number	US-11057145-B2
Application number	US-202017028090-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Mar 29, 2018
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

Disclosed herein is a wavelength-division multiplexing device with a unified passband. In particular, disclosed is a wavelength-division multiplexing (WDM) device with at least a common port, a channel port, and a WDM filter. The common port is configured for optical communication of a multiplexed signal to the WDM filter. A demultiplexed signal of the multiplexed signal includes a first secondary demultiplexed signal within a first wavelength range and a second secondary demultiplexed signal within a second wavelength range, which are separated from each other by a third wavelength range. The first WDM filter has a single unified passband including the first wavelength range, the second wavelength range, and the third wavelength range, such that the first WDM filter is configured to pass the first secondary demultiplexed signal and the second secondary demultiplexed signal to the first channel port.

First claim

What is claimed is:

1. A wavelength-division multiplexing (WDM) device, comprising:
a first common port configured for optical communication of a first multiplexed signal comprising a first primary demultiplexed signal, a second primary demultiplexed signal, a third primary demultiplexed signal, a fourth primary demultiplexed signal, and a fifth primary demultiplexed signal, the first primary demultiplexed signal comprising a first secondary demultiplexed signal within a first wavelength range and a second secondary demultiplexed signal within a second wavelength range, the first wavelength range and the second wavelength range separated from each other by the third wavelength range;
a first channel port configured for optical communication of the first primary demultiplexed signal;
a second channel port configured for optical communication of the second primary demultiplexed signal;
a third channel port configured for optical communication of the third primary demultiplexed signal;
a fourth channel port configured for optical communication of the fourth primary demultiplexed signal;
a fifth channel port configured for optical communication of the fifth primary demultiplexed signal;
a first WDM filter having a first single unified passband comprising the first wavelength range, the second wavelength range, and the third wavelength range, the first WDM filter configured to pass the first secondary demultiplexed signal and the second secondary demultiplexed signal to the first channel port and to pass the second primary demultiplexed signal to the second channel port;
a second WDM filter having a second passband, the second WDM filter configured to pass the second primary demultiplexed signal to the second channel port;
a third WDM filter having a third passband, the third WDM filter configured to pass the third primary demultiplexed signal to the third channel port;
a fourth WDM filter having a fourth passband, the fourth WDM filter configured to pass the fourth primary demultiplexed signal to the fourth channel port; and
a fifth WDM filter having a fifth passband, the fifth WDM filter configured to pass the fifth primary demultiplexed signal to the fifth channel port;
wherein:
the first primary demultiplexed signal comprises a GPON signal;
the second primary demultiplexed signal comprises an XGS-PON signal;
the third primary demultiplexed signal comprises an NG-PON2 signal;
the fourth primary demultiplexed signal comprises a radio frequency (RF) signal; and
the fifth primary demultiplexed signal comprises an optical time-domain reflectometer (OTDR) signal.

2. The WDM device of claim 1 , wherein the first common port comprises a first common collimator, the first channel port comprises a first channel collimator, and the second channel port comprises a second channel collimator.

3. A method for wavelength-division multiplexing (WDM) routing, comprising:
transmitting a first multiplexed signal from a first common port, the first multiplexed signal comprising a first primary demultiplexed signal and a second primary demultiplexed signal, the first primary demultiplexed signal comprising a first secondary demultiplexed signal within a first wavelength range and a second secondary demultiplexed signal within a second wavelength range, the first wavelength range and the second wavelength range separated from each other by a third wavelength range;
routing the first primary demultiplexed signal to a first channel port by passing the first secondary demultiplexed signal and the second secondary demultiplexed signal through a first WDM filter having a first single unified passband comprising the first wavelength range, the second wavelength range, and the third wavelength range;
routing the second primary demultiplexed signal to a second channel port by reflection of the first WDM filter;
routing the second primary demultiplexed signal of the first multiplexed signal to the second channel port by passing the second primary demultiplexed signal through a second WDM filter having a second passband;
routing a third primary demultiplexed signal of the first multiplexed signal to a third channel port by passing the third primary demultiplexed signal through a third WDM filter having a third passband; and
routing a fourth primary demultiplexed signal of the first multiplexed signal to a fourth channel port by passing the fourth primary demultiplexed signal through a fourth WDM filter having a fourth passband;
wherein:
the first primary demultiplexed signal comprises a GPON signal;
the second primary demultiplexed signal comprises an XGS-PON signal;
the third primary demultiplexed signal comprises an NG-PON2 signal;
the fourth primary demultiplexed signal comprises a radio frequency (RF) signal; and
the fifth primary demultiplexed signal comprises an optical time-domain reflectometer (OTDR) signal.

4. The method of any of claim 3 , wherein the first common port comprises a first common collimator, the first channel port comprises a first channel collimator, and the second channel port comprises a second channel collimator.

5. A wavelength-division multiplexing (WDM) system, comprising:
a source, a first WDM device, a second WDM device and a destination in optical communication with the source via the first WDM device and the second WDM device;
wherein the first WDM device comprises:
a first common port configured for receiving a multiplexed signal from the source, wherein the multiplexed signal comprises a first primary demultiplexed signal and a second primary demultiplexed signal, the first primary demultiplexed signal comprising a first secondary demultiplexed signal within a first wavelength range and a second secondary demultiplexed signal within a second wavelength range, the first wavelength range and the second wavelength range separated from each other by a third wavelength range;
a first channel port configured for optical communication of the first primary demultiplexed signal;
a second channel port configured for optical communication of the second primary demultiplexed signal; and
a first WDM filter having a first single unified passband comprising the first wavelength range, the second wavelength range, and the third wavelength range, the first WDM filter configured to pass the first secondary demultiplexed signal and the second secondary demultiplexed signal to the first channel port and to pass the second primary demultiplexed signal to the second channel port; and

wherein the second WDM device comprises:
a second common port configured for receiving the first primary demultiplexed signal from the first channel port;
a third channel port configured for optical communication of the first secondary demultiplexed signal;
a fourth channel port configured for optical communication of the second secondary demultiplexed signal; and
a second WDM filter having a second passband, the second WDM filter configured to pass the first secondary demultiplexed signal to the third channel port and the destination.

6. The WDM system of claim 5 , wherein the first primary demultiplexed signal comprises a GPON signal.

7. The WDM system of claim 5 , wherein the second primary demultiplexed signal comprises an XGS-PON signal.

8. The WDM system of claim 5 , wherein the second primary demultiplexed signal comprises an NG-PON2 signal.

9. The WDM device of claim 5 , wherein the first primary demultiplexed signal comprises a GPON signal, the second primary demultiplexed signal comprises either an XGS-PON signal or an NG-PON2 signal.

Assignees

• Alliance Fiber Optics Prod Inc

Inventors

• Gui Dong
• Li Yao
• Xiao Shudong
• Zhou Andy Fenglei

Classifications

• H04J14/0213

  Groups of channels or wave bands arrangements · CPC title

• H04J14/0267 Primary

  Optical signaling or routing · CPC title

• H04J14/0209 Primary

  Multi-stage arrangements, e.g. by cascading multiplexers or demultiplexers · CPC title

• H04J14/0239

  in WDM-PON sharing multiple downstream wavelengths for groups of optical network units [ONU], e.g. multicasting wavelengths · CPC title

• H04J14/0216

  Bidirectional architectures · CPC title