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公开(公告)号：USRE48654E1
公开(公告)日：2021-07-20
申请号：US16211533
申请日：2018-12-06
Applicant: Elenion Technologies, LLC
Inventor： Yi Zhang , Shuyu Yang , Kishore Padmaraju , Michael J. Hochberg
Abstract: An optical device that includes means for thermal stabilization and control is described. The optical device can be a ring resonator, or another device that requires accurate control of the phase of the optical signal. In an example involving an optical resonator, a thermal stabilization system includes a temperature sensor, a control circuit, and a heater local to the resonator. The temperature sensor can be a bandgap temperature sensor formed of a pair of matched p/n junctions biased in operation at different junction currents.
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公开(公告)号：US20210159659A1
公开(公告)日：2021-05-27
申请号：US16693328
申请日：2019-11-24
Applicant: Elenion Technologies, LLC
Inventor： Saumil Bandyopadhyay , Michael J. Hochberg
Abstract: Photonic chip includes an external cavity (EC) optical circuit to provide wavelength-selective optical feedback to a length of active optical fiber. Light generated in the active optical fiber may be coupled from the EC circuit to a light processing circuit of the photonic chip, such as an optical modulator or an optical mixer. The EC circuits may include single-frequency and multi-frequency optical filters, which may include ring resonators, dual-ring resonators, and optical modulators to support multi-frequency lasers. The EC circuits may further include pump combiners and optical isolators.
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公开(公告)号：US11002992B2
公开(公告)日：2021-05-11
申请号：US16682303
申请日：2019-11-13
Applicant: Elenion Technologies, LLC
Inventor： Bernd-Harald Horst Jurgen Rohde
IPC: G02F1/01 , G02F1/225 , H04B10/556 , H04L27/20 , H04B10/079 , H04B10/50 , G02F1/21
Abstract: An optical IQ modulator with automatic bias control is disclosed. A dither signal is applied to the modulator bias and its signature detected in light tapped from an output of the modulator using a phase sensitive dither detector such as a lock-in amplifier. The detected signal is processed using pre-recorded information defining the direction of the detected signal change relative to a change in the modulator bias, and the bias is adjusted in the direction determined using the information. The IQ phase bias is controlled by dithering I and Q optical signals in quadrature to produce opposite-sign single subband modulation of output light at two different dither frequencies, and detecting an oscillation at a difference frequency using a lock-in detector.
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公开(公告)号：US10756690B2
公开(公告)日：2020-08-25
申请号：US16807631
申请日：2020-03-03
Applicant: Elenion Technologies, LLC
Inventor： Mostafa Ahmed , Alexander Rylyakov
Abstract: In conventional optical receivers the dynamic range is obtained by using variable gain amplifiers (VGA) with a fixed trans-impedance amplifier (TIA) gain. To overcome the SNR problems inherent in conventional receivers an improved optical receiver comprises an automatic gain control loop for generating at least one gain control signal for controlling gain of both the VGA and the TIA. Ideally, both the resistance and the gain of the TIA are controlled by a gain control signal.
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公开(公告)号：US10742324B1
公开(公告)日：2020-08-11
申请号：US16417788
申请日：2019-05-21
Applicant: Elenion Technologies, LLC
Inventor： Kishore Padmaraju , Ruizhi Shi , Yangjin Ma , Matthew Streshinsky
Abstract: A semiconductor-based Mach-Zehnder modulator (MZM) is configured for push-pull bias dithering to control the MZM bias at a desired set point. When two such MZM modulators are connected in parallel to form an IQ modulator, bias settings for both MZMs and the IQ bias may be controlled from an output of the IQ modulator to minimize both the IQ offset and the quadrature error of the output signal constellation even for non-ideal MZMs with low extinction ratios.
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Patent Agency Ranking
公开(公告)号：US20200249540A1
公开(公告)日：2020-08-06
申请号：US16265496
申请日：2019-02-01
Applicant: Elenion Technologies, LLC
Inventor： Daihyun Lim , Alexander Rylyakov , Yangjin Ma
IPC: G02F1/225
Abstract: A photonic chip including an integrated optoelectronic device is flip-chip mounted to a carrier. The optoelectronic device is provided with a 3D ground cage as a shield for stray EM radiation. The 3D ground cage is formed by a device ground electrode partially enclosing the optoelectronic device on a face of the chip, a carrier ground electrode disposed opposite to the device ground electrode, and a plurality of metal pillars therebetween at least partially surrounding the optoelectronic device. The optoelectronic device may be an OE converter of an integrated optical receiver. The optoelectronic device may also be an EO converter of an integrated optical transmitter.
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公开(公告)号：US20200232878A1
公开(公告)日：2020-07-23
申请号：US16250002
申请日：2019-01-17
Applicant: Elenion Technologies, LLC
Inventor： Yangjin Ma , Ruizhi Shi , Noam Ophir , Ran Ding
Abstract: A method and structure are provided for testing photonic circuits with integrated optical mixers having idle ports. A test port is provided for coupling test light into one or more idle ports of the mixer. Light exiting output ports of the mixer may be measured with photodetectors. Phase errors of optical hybrids may be determined by using waveguides of different lengths to inject test light into two input ports of the mixer and scanning the test wavelength. The method and structure may be used for on-wafer and off-wafer measurements of integrated photonic circuits implementing coherent optical receivers.
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公开(公告)号：US10680410B2
公开(公告)日：2020-06-09
申请号：US16665206
申请日：2019-10-28
Applicant: Elenion Technologies, LLC
Inventor： Yangjin Ma , Yang Liu , Ruizhi Shi , Thomas Wetteland Baehr-Jones , Saeed Fathololoumi
IPC: H01S5/14 , H01S5/068 , H01S3/083 , H01S5/10 , H01S3/13 , H01S5/02 , H01S5/40 , H01S5/028 , H01S3/106
Abstract: Practical silicon-based light sources are still missing, despite the progress in germanium lasers, because both silicon and germanium are indirect-band semiconductors and inefficient at light generation. A tunable and single mode external cavity laser comprising: a gain medium for generating light between a reflective surface at one end of the gain medium; and a wavelength selective reflector at the other end of a laser cavity. A splitter disposed in the laser cavity includes an input port optically coupled to the gain medium, an input/output port optically coupled to the wavelength selective reflector, and an output port for outputting laser light at selected wavelengths. The wavelength selective reflector reflects light of one or more selected periodic wavelengths back to the gain medium via the input/output port, and passes light of non-selected wavelengths out of the laser cavity.
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公开(公告)号：US20200150343A1
公开(公告)日：2020-05-14
申请号：US16711765
申请日：2019-12-12
Applicant: Elenion Technologies, LLC
Inventor： Yangjin Ma , Michael J. Hochberg , Ruizhi Shi , Yang Liu
Abstract: A low loss high extinction ratio on-chip polarizer is disclosed. The polarizer is formed of a mode convertor followed by a mode squeezer and a dump waveguide, and may be configured to pass a desired waveguide mode and reject undesired modes. An embodiment is described that transmits a TE0 mode while blocking a TM0 mode by converting it into a higher-order TEn mode in a waveguide taper, squeezing out the TEn mode in a second waveguide taper to lessen its confinement, and then dumping the TEn mode in a waveguide bend that is configured to pass the TE0 mode.
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10.发明申请公开(公告)号：US20200099452A1
公开(公告)日：2020-03-26
申请号：US16585700
申请日：2019-09-27
Applicant: Elenion Technologies, LLC
Inventor： Guido Saathoff , Matthew Akio Streshinsky , Robert Palmer , Torsten Wuth
Abstract: A transceiver having an improved transmitter optical signal to noise ratio, and methods of making and using the same.
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