Tunable optical filter, tunable optical component, and multi-wavelength passive optical network system

An optical receive component, comprising an optical fiber adapter, a tunable optical filter, and an optical receive sub-module, wherein:

• the tunable optical filter is configured to perform a wavelength selection for an optical signal that is input from an optical fiber connected to the optical fiber adapter, and provide the optical receive sub-module with an optical signal that is obtained after the wavelength selection;
• and
• the tunable optical filter comprises:
• a substrate, a tunable filter unit, a temperature control unit, and an enclosure, wherein:
• the substrate, the tunable filter unit, and the temperature control unit are placed inside the enclosure, wherein the enclosure comprises a light incidence window and a light emergence window,
• the substrate is disposed adjacent to the light incidence window or the light emergence window, and configured to support the tunable filter unit,
• the temperature control unit is disposed on a surface of the tunable filter unit, and configured to adjust a channel wavelength of the tunable filter unit by means of temperature control, and
• an optical path of the light incidence window, an optical path of the tunable filter unit and an optical path of the light emergence window are aligned,
• wherein the optical receive sub-module is fastened on the tunable optical filter by using a metal ring, and the metal ring is partially set on the tunable optical filter and is partially set on the optical receive sub-module.

An optical transceiver component, comprising an optical fiber adapter, a tunable optical filter, an optical receive sub-module, an optical transmit sub-module, and a substrate base, wherein:

• the substrate base is configured to provide transmitted light of the optical transmit sub-module for an optical fiber connected to the optical fiber adapter, and provide the tunable optical filter with received light that is input by the optical fiber;
• and
• the tunable optical filter is configured to perform wavelength selection for the received light, and provide the optical receive sub-module with the received light that is obtained after the wavelength selection,
• wherein the tunable optical filter is disposed between the substrate base and the optical receive sub-module.

A multi-wavelength passive optical network system, comprising at least one optical line terminal (OLT) and multiple optical network units (ONUs), wherein the at least one OLT is connected to the multiple ONUs by using an optical distribution network in a point-to-multipoint manner, and at least one of the ONUs comprise a tunable optical filter comprising:

• a substrate, a tunable filter unit, a temperature control unit, and an enclosure, wherein:
• the substrate, the tunable filter unit, and the temperature control unit are placed inside the enclosure, wherein the enclosure comprises a light incidence window and a light emergence window;
• the substrate is disposed adjacent to the light incidence window or the light emergence window, and configured to support the tunable filter unit;
• the temperature control unit is disposed on a surface of the tunable filter unit, and configured to adjust a channel wavelength of the tunable filter unit by means of temperature control;
• and
• an optical path of the light incidence window, an optical path of the tunable filter unit and an optical path of the light emergence window are aligned,
• wherein the tunable optical filter further comprises a temperature sensor that is disposed at a bottom of the substrate, connected to the temperature control unit by using a conducting wire, and configured to control, according to detected temperature of the tunable filter unit, the temperature control unit to perform wavelength adjustment or locking on the tunable filter unit.