Wavelength-division multiplexing device with a unified passband

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.

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.