Future Wei Technologies, Inc.

Huawei Technologies Co., Limited

Yangjing Wen

Yu Sheng Bai

Xiao Andy Shen

YuSheng Bai

Yan Cui

Hongzhen Wei

Xueyan Zheng

Fei Zhu

Chunlei Liao

An Li

Yusheng Bai

A method comprising: receiving a multiplexed optical signal comprising optical channels for N wavelengths, N being a positive integer greater than or equal to two; and separating the multiplexed optical signal into a first multiplexed light and a second multiplexed light, each of the first multiplexed light and the second multiplexed light having the same polarization, and each of the first multiplexed light and the second multiplexed light having N wavelengths; separating the first multiplexed light into a plurality of first lights, each having a different wavelength; separating the second multiplexed light into a plurality of second lights simultaneous with separating the first multiplexed light into the first lights, each of the second lights having a different wavelength; and generating optical parameters for each optical channel in the N wavelengths using the first light and the second light for each wavelength.

Wavelength division multiplexed optical parameter detection receiver

An apparatus comprising a polarization beam splitter optically coupled to a first light path and a second light path and configured to receive a CW light having a plurality of wavelengths, forward a first light beam of the CW light along the first light path, and forward a second light beam of the CW light along the second light path. A first multiplexer coupled to the first light path and configured to de-multiplex the first light beam into a first plurality of channels each corresponding to one of the plurality of wavelengths. A second multiplexer coupled to the second light path and configured to de-multiplex the second light beam into a second plurality of channels each corresponding to one of the plurality of wavelengths. A modulator coupled to the first multiplexer and the second multiplexer and configured to modulate the first plurality of channels and the second plurality of channels.

Wavelength division multiplexed polarization independent reflective modulators

Narrow linewidth multi-wavelength (MW) light sources and related methods are disclosed. Such a light source includes gain chips coupled to a wavelength combiner and reflection chip that includes phase control sections (PCSs), a wavelength division multiplexer (WDM), and a micro-ring resonator (MRR) based reflector. The WDM combines light beams received from the gain chips, via the PCSs, into a combined light beam. The MRR based reflector receives the combined light beam and generates both a reflection MW light beam and a transmission MW light beam. The WDM receives the reflection MW light beam, separates it into different wavelengths, and provides each different wavelength of light via a respective one of the PCSs to a respective one of the gain chips to self seed an internal laser cavity thereof. The transmission MW light beam is, or is used to produce, the narrow linewidth MW light produced by the light source.

Narrow linewidth multi-wavelength light sources

An optical modulator for generating quadrature amplitude modulation (nQAM) and phase-shift keying (nPSK) signals with tunable modulation efficiency. The modulator includes a controlling circuit for adjusting the modulation efficiency or modulation depth of the modulator by controlling the direct current (DC) bias.

Optical N-level quadrature amplitude modulation (NQAM) generation based on phase modulator

A transmission-type polarization insensitive modulator implemented as a polarization insensitive micro ring modulator (PIMRM) includes a first polarization splitter-rotator (PSR) configured to generate a first light beam and a second light beam having a common polarization from an input, a micro ring configured to modulate the first light beam with data to generate a first output signal, and modulate the second light beam with data to generate a second output signal, and a second PSR configured to combine the first output signal and the second output signal to form a modulated output signal, wherein the micro ring is disposed in between the first PSR and the second PSR.

Polarization insensitive micro ring modulator

A wavelength-division multiplexed (WDM) polarization-independent transmissive modulator (PITM) that receives a multi-wavelength continuous wave (CW) light of indeterminate polarization, splits the multi-wavelength CW light into two transverse electric (TE) polarized components, demultiplexer the polarized components into single-wavelength CW lights, modulates the single-wavelength CW lights using four-port cross-state or bypass-state modulators, multiplexes the modulated output of the four-port modulators (FPM) into two polarized modulated components, and combines the two polarized modulated components into a multi-wavelength modulated output signal.

Wavelength-division multiplexed polarization-insensitive transmissive modulator

A method of modulation implemented by a polarization insensitive integrated optical modulator (PIIOM). The method includes receiving, at an input, a continuous wave (CW) light, splitting, by a first polarization splitter-rotator (PSR), the CW light into a first light beam having a transverse electric (TE) polarization and a second light beam having a transverse magnetic (TM) polarization, rotating, by the first PSR, the second light beam having the TM polarization to generate a third light beam having the TE polarization, modulating, with a multiport modulator, the first light beam with data to generate a first output signal and the third light beam with data to generate a second output signal, combining, by a second PSR, the first output signal and the second output signal to form a modulated output CW light, and transmitting, at an output separate from the input, the modulated output CW light to an optical receiving device.

Polarization insensitive integrated optical modulator

A system comprises: a polarization state aligner (PSA) comprising: an input port; a first polarization beam splitter (PBS) coupled to the input port; a first phase shifter (PS) coupled to the first PBS; a first polarization rotator (PR) coupled to the first PBS; a first beam splitter (BS) coupled to the first PS and the first PR; a first output port coupled to the first BS; and a second output port coupled to the first BS.

Polarization state aligner (PSA)

Methods and apparatus for directly detected optical system based on gapped CAP modulation and DSP Methods for generation and reconstruction of gapped CAP signal are disclosed. An apparatus for direct detection transmission for CAP modulated signal with two unbalanced optical sidebands separated by gaps is disclosed, in which a gapped CAP signal is generated, converted, and passed to an optical filter for unbalanced sidebands generation and wavelength locking before being transmitted over an optical link. Direct detection is performed on the optical signal and passed to gapped matching filters. Channel equalization is performed and the signal information is decoded to binary data.

Method and apparatus for directly detected optical transmission systems based on carrierless amplitude-phase modulation

An apparatus comprising a transmitter configured to generate an optical signal comprising a carrier modulated with at least two sidebands modulated with information, wherein the information introduces a separation gap in a frequency domain between the sidebands and the carrier, wherein one of the sidebands is an undesired sideband and another one of the sidebands is a desired sideband with a higher power intensity than the undesired sideband. A method comprising receiving an optical carrier from a light source and modulating the optical carrier with at least two sidebands modulated with information, wherein the information introduces a separation gap in a frequency domain between the sidebands and the optical carrier, wherein one of the sidebands is an undesired sideband and another one of the sidebands is a desired sideband having a higher power intensity than the undesired sideband.

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Cupertino, CA, United States of America

Yangjing Wen