Zte Corporation

Xi'an Zhongxing New Software Co., Ltd.

Hisense USA Corporation

Hisense International Co., Ltd.

Hisense Broadband Multimedia Technologies, Ltd.

Songlin Zhu

Dan Geng

Yongjia Yin

Dezhi Zhang

Zian He

Li Zhang

Weiliang Zhang

Hai Liu

Liquan Yuan

Yong Guo

Jie Su

Yang Gao

Liang Cheng

Xingang Huang

Sigeng Yang

Qisheng Zhao

Qiang Zhang

Dawei Wang

Dengshan Xue

Biao Chen

Sui Xiao

Wu Chen

Guanjun Zeng

Weifeng Tong

Deming Liu

Minming Zhang

Changjian Ke

Provided are transmitting, receiving and communication systems of an optical network and a method for modulating a signal. The transmitting system includes: first Passive Optical Network (PON) equipment, configured to output a binary digital signal; and an M-order digital modulator, configured to modulate the binary digital signal into an M-order digital signal, and output the M-order digital signal, wherein each transmission symbol in the M-order digital signal carries information of N=logbits, where N is a natural number greater than 1 and M is a natural number. By the disclosure, the problems in the related art is solved, the bandwidths required by transmission are further reduced, and the actual cost of the optical transceiver modules is lowered.

Transmitting, receiving and communication systems of optical network and method for modulating signal

An optical module and an optical device applicable to the optical module, wherein the optical module includes a laser emission unit, a laser reception unit, a video detector and an optical assembly, the optical assembly including: a band-pass device Fwith a small-angle incidence filter sheet, wherein among optical signals transmitted to Fvia a common port of F, the optical signal in a first optical wavelength band is passed by the small-angle incidence filter sheet and output to the video detector via the passing port thereof; and the optical signals in other bands are reflected by the small-angle incidence filter sheet and output via the reflection port thereof; a filter sheet Fconfigured to pass the optical signal emitted by the laser emission unit to the reflection port of Fand to reflect the optical signal, received by the laser reception unit, output via the reflection port of F

Optical module and optical device applicable to optical module

Disclosed are a method and device for transmitting optical signals. The method comprises: if there is Raman crosstalk between a first optical network system and a coexistence system, an upstream wavelength band of the first optical network system is set outside a range with an upstream wavelength band of the coexistence system being a center and with an impact intensity of the Raman crosstalk being a radius, and a downstream wavelength band of the first optical network system is set outside a range with the downstream wavelength band of the coexistence system being a center and with the impact intensity of the Raman crosstalk being a radius; and optical signals are transmitted by using the upstream wavelength band of the first optical network system and the downstream wavelength band of the first optical network system. The disclosure can avoid interference and improve signal quality.

Method and device for transmitting optical signals

A method for amplifying and dynamically adjusting an optical signal is provided in the present invention, which includes: a first optical tap splitting out a small part of the optical signal, which is converted into an electric signal via a first optical detector and is then output to a high speed gain control circuit, in proportion from an uplink burst optical signal, and outputting a remainder of the optical signal to an optical amplifier; the high speed gain control circuit dynamically adjusting the control signal loaded on the optical amplifier according to the input electric signal which varies with uplink burst slots; and the optical amplifier dynamically adjusting a gain value according to the loaded control signal to make peak powers of the output uplink optical signals in different burst slots equal, thus achieving output power equalization.

Method and apparatus for amplifying and dynamically adjusting optical signal

The disclosure provides an optical network system, an Optical Line Terminal (OLT), an Optical Network Unit (ONU) and an Optical Distribution Network (ODN) apparatus. The system includes: an OLT configured to modulate and encode at least one line of time-division-multiplexed downlink signals, synthesize the downlink signals encoded into one line and then output it, receive uplink signals, and decode the uplink signals received and then output them; an ODN configured to separate the downlink signals received into multiple lines and then output them, synthesize the uplink signals received into one line, and then output it to the OLT; and ONUs configured to receive the downlink signals output from the ODN, decode the downlink signals received and output them, encode one line of time-division-multiplexed uplink signals, and output the uplink signals encoded to the ODN. Decoding of the downlink signals and encoding of the uplink signals can further be implemented by the ODN. By means of the solution of the disclosure, a hybrid Passive Optical Network (PON) system based on a Time Division Multiplexing (TDM) technology and an Optical Code Division Multiple Access (OCDMA) technology.

Optical network system, optical line terminal, optical network unit and optical distribution network apparatus

A wavelength division multiplexer is provided by the present invention, which implements the wavelength division multiplexing and de-multiplexing of the optical signals in the basic and upgrade bands by reasonably arranging the filters and selecting the spectral properties of the filters, so that the existing time division multiplexing passive optical network (TDM-PON) can transmit the next generation passive optical network (NG-PON) simultaneously and the existing TDM-PON can be smoothly upgraded to the NG-PON, meanwhile, it provides the deployed TDM-PON with the subsequent network compatibility. The wavelength division multiplexer provided in the present invention can meet the high isolation requirement of the optical signals in working band with low cost, and takes both the isolation requirement and the optical network insertion loss requirement into account, thus it has high reliability, is easy to use and for system upgrade.

Wavelength division multiplexer compatible with two types of passive optical networks

A wavelength division and time division hybrid multiplexing passive optical network system, terminals and a signal transmission method are disclosed in the present invention. The system comprises: a plurality of optical modules at the optical line terminal side connecting to an office all-optical wavelength conversion unit, the all-optical wavelength conversion unit connecting with a subscriber all-optical wavelength conversion unit via a fiber, and the subscriber all-optical wavelength conversion unit connecting with a plurality of optical couplers, and each optical couplers connecting with a plurality of optical network units respectively; the present invention facilitates full use of the existing source of access network and ensures a smooth transition from the time division multiplexing passive optical network to the optical access network of the next generation without changing the structure of the current time division passive optical network.

Wavelength division and time division multiplex mixing passive optical network system, terminal and signal transmission method

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Shenzhen, China

Songlin Zhu