Optical fiber subscriber network

An optical fiber subscriber network, comprising:

• a central office for allocating a combination of optical wavelengths to a subscriber upon receipt of a service request signal from said subscriber, and for transmitting the wavelength division multiplexed optical wavelength through an optical fiber, said central office comprising:
• an exchange for allocating the combination of the optical wavelengths to said subscriber upon receipt of the service request signal from said subscriber,
• a plurality of optical transmitters for converting electric signals output from said exchange to optical signals of unique wavelengths,
• a wavelength division multiplexer for wavelength division multiplexing the optical signals output from said optical transmitters, and for transmitting the wavelength division multiplexed optical signals through the optical fiber, and
• an optical amplifier for amplifying the wavelength division multiplexed optical signals to compensate for transmission loss for transmission to the subscriber through the optical fiber;
• and
• a plurality of optical subscriber devices for optically distributing the wavelength division multiplexed optical signals received through the optical fiber to select optical wavelengths allocated thereto, and for outputting the selected optical wavelengths to corresponding subscriber terminals;
• wherein each said optical subscriber device comprises:
• an optical distributor for distributing the wavelength division multiplexed optical signals received through an incoming optical fiber to internal optical fibers;
• an optical receiver module for converting distributed optical signals from said optical distributor to electrical signals;
• a concentrator for switching and concentrating the electrical signals from said optical receiver module to provide outputs to multimedia terminals connected to output ports of said optical subscriber device;
• a fixed optical filter for filtering a wavelength group allocated from the wavelength division multiplexed optical signals to receive an optical wavelength group pre-allocated in said central office and to output corresponding optical signals to said optical distributor;
• and
• an electronic signal converter for converting the outputs of said concentrator so as to connect the multimedia terminals to said concentrator.

An optical fiber subscriber network, comprising:

• a central office for allocating a combination of optical wavelengths to a subscriber upon receipt of a service request signal from said subscriber, for wavelength division multiplexing requested information together with a combined optical wavelength, and for transmitting wavelength division multiplexed optical signals through an optical fiber;
• and
• a plurality of optical subscriber devices for optically distributing, filtering and combining said wavelength division multiplexed optical signals received through the optical fiber to select optical wavelengths allocated thereto and for outputting the selected optical wavelengths to corresponding subscriber terminals;
• wherein each said optical subscriber device comprises:
• an optical distributor for distributing the wavelength division multiplexed optical signals received through an incoming optical fiber to internal optical fibers;
• a fixed optical filter for filtering a wavelength group allocated from the wavelength division multiplexed optical signals to receive an optical wavelength group pre-allocated in said central office and to output corresponding optical signals;
• an optical receiver module connected to an output of said fixed optical filter for converting the corresponding optical signals output from said fixed optical filter to electric signals;
• a concentrator for switching and concentrating the electrical signals from said optical receiver module to provide outputs to multimedia terminals connected to output ports of said optical subscriber device;
• and
• an electronic signal converter for converting the outputs of said concentrator so as to connect the multimedia terminals to said concentrator.

An optical fiber subscriber network, comprising:

• a central office for allocating respective optical wavelength groups to respective subscribers, for wavelength division multiplexing requested information together with the optical wavelength groups, and for transmitting wavelength division multiplexed optical signals through an optical fiber;
• and
• a plurality of optical subscriber devices for receiving said wavelength division multiplexed optical signals through the optical fiber, for selecting an optical wavelength group allocated thereto, and for outputting the selected optical wavelength group to corresponding subscriber terminals;
• wherein said wavelength division multiplexed optical signals transmitted by said central office to each of said optical subscriber devices include all wavelength groups for all of said optical subscribers, and each said optical subscriber device receives and filters the wavelength division multiplexed optical signals, including all wavelength groups, in order to select its respective allocated optical wavelength group and to output corresponding optical signals;
• and
• wherein each said optical subscriber device comprises a concentrator for switching and concentrating the electrical signals from said optical receiver module to provide outputs to multimedia terminals connected to output ports of said optical subscriber device, and an electronic signal converter for converting the outputs of said concentrator so as to connect the multimedia terminals to said concentrator.