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1. 再颁专利

USRE48654E1 Photonic integrated circuit incorporating a bandgap temperature sensor 有权
公开(公告)号：USRE48654E1
公开(公告)日：2021-07-20
申请号：US16211533
申请日：2018-12-06
申请人： Elenion Technologies, LLC
发明人： Yi Zhang , Shuyu Yang , Kishore Padmaraju , Michael J. Hochberg
IPC分类号： G02F1/225 , G02B6/26 , G02B6/134 , G02B6/122 , G02B6/12 , G02B6/293
摘要： 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.

2. 发明申请

US20210159659A1 PHOTONIC CHIP INTEGRATED WITH A FIBER LASER 有权
公开(公告)号：US20210159659A1
公开(公告)日：2021-05-27
申请号：US16693328
申请日：2019-11-24
申请人： Elenion Technologies, LLC
发明人： Saumil Bandyopadhyay , Michael J. Hochberg
IPC分类号： H01S3/067 , H01S3/00 , H01S3/091 , G02B6/293 , G02B6/12 , H01S3/094
摘要： 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.

3. 发明授权

US11002992B2 Bias control of optical modulators 有权
公开(公告)号：US11002992B2
公开(公告)日：2021-05-11
申请号：US16682303
申请日：2019-11-13
申请人： Elenion Technologies, LLC
发明人： Bernd-Harald Horst Jurgen Rohde
IPC分类号： G02F1/01 , G02F1/225 , H04B10/556 , H04L27/20 , H04B10/079 , H04B10/50 , G02F1/21
摘要： 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.

4. 发明授权

US10756690B2 Automatic gain control loop 有权
公开(公告)号：US10756690B2
公开(公告)日：2020-08-25
申请号：US16807631
申请日：2020-03-03
申请人： Elenion Technologies, LLC
发明人： Mostafa Ahmed , Alexander Rylyakov
IPC分类号： H03F3/08 , H03G3/30 , H04B10/69 , H03G1/00 , H03F3/68 , H03F3/16
摘要： 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.

5. 发明授权

US10742324B1 Bias control of optical modulators 有权
公开(公告)号：US10742324B1
公开(公告)日：2020-08-11
申请号：US16417788
申请日：2019-05-21
申请人： Elenion Technologies, LLC
发明人： Kishore Padmaraju , Ruizhi Shi , Yangjin Ma , Matthew Streshinsky
IPC分类号： H04B10/50 , G02F1/01
摘要： 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.

6. 发明授权

US10680410B2 External cavity laser 有权
公开(公告)号：US10680410B2
公开(公告)日：2020-06-09
申请号：US16665206
申请日：2019-10-28
申请人： Elenion Technologies, LLC
发明人： Yangjin Ma , Yang Liu , Ruizhi Shi , Thomas Wetteland Baehr-Jones , Saeed Fathololoumi
IPC分类号： H01S5/14 , H01S5/068 , H01S3/083 , H01S5/10 , H01S3/13 , H01S5/02 , H01S5/40 , H01S5/028 , H01S3/106
摘要： 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.

7. 发明授权

US10530487B2 Distributed travelling-wave mach-zehnder modulator driver 有权
公开(公告)号：US10530487B2
公开(公告)日：2020-01-07
申请号：US16398422
申请日：2019-04-30
申请人： Elenion Technologies, LLC
发明人： Ran Ding , Thomas Wetteland Baehr-Jones , Michael J. Hochberg , Alexander Rylyakov
IPC分类号： H04B10/04 , H04B10/556 , G02F1/225 , H04B10/50 , G02F1/01 , G02F1/025 , H04B10/516 , H04B10/54 , G02F1/21
摘要： A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.

8. 发明授权

US10530485B2 Optical link architecture based on wireline equalization techniques 有权
公开(公告)号：US10530485B2
公开(公告)日：2020-01-07
申请号：US16260425
申请日：2019-01-29
申请人： Elenion Technologies, LLC
发明人： Alexander Rylyakov , Richard Younce , Ran Ding , Peter D. Magill , Hao Li , Michael J. Hochberg
IPC分类号： H04B10/58 , H04B10/524 , H04L25/03 , H04B10/54 , H04B10/69 , H04B10/50 , H04L27/06
摘要： A high data rate, high sensitivity, low power optical link using low-bandwidth components and low-bandwidth E/O drivers and receivers and method of building same. The method is based on the idea of making the optical part of the link look like a bandwidth limited lossy electrical channel, so that the powerful equalization methods used in the wireline electrical links can be applied to recover the transmitted data in a situation with low bandwidth and/or high loss and strong inter-symbol interference. Linear and non-linear optical channel components, E/O drivers and receivers can benefit from the apparatus and the methods of the invention.

9. 发明授权

US10527793B1 Dump terminator 有权
公开(公告)号：US10527793B1
公开(公告)日：2020-01-07
申请号：US16255971
申请日：2019-01-24
申请人： Elenion Technologies, LLC
发明人： Yang Liu , Ruizhi Shi , Tal Galfsky
IPC分类号： G02B6/24
摘要： When routing light on photonic integrated circuit (PIC) chips optical back-reflection and scattering can be highly detrimental to the desired application. Unused ports of optical devices, such as MMI, DC, Y-junction, PD, etc. are a cause for back-reflection and scattering, whereby the scattered light could get picked up by adjacent components, e.g. photodetectors. Management of stray light on the PIC is needed to prevent the undesired coupling between various components and to reduce noise. A dump taper may be used to guide and scatter stray light away from sensitive components or fully absorb the light while maintaining very low reflection from the taper. A doped dump taper may be used to passively absorb light reaching the unused port, thereby eliminating unwanted reflection and scattering. Alternatively, an undoped taper may be used to scatter light away from sensitive components while maintaining very low back-reflection.

10. 发明授权

US10444451B2 Shielded photonic integrated circuit 有权
公开(公告)号：US10444451B2
公开(公告)日：2019-10-15
申请号：US16238692
申请日：2019-01-03
申请人： Elenion Technologies, LLC
发明人： Ruizhi Shi , Yang Liu , Ari Novack , Yangjin Ma , Kishore Padmaraju , Michael J. Hochberg
IPC分类号： G02B6/42 , G02B6/12 , G02B6/122
摘要： A light shield may be formed in photonic integrated circuit between integrated optical devices of the photonic integrated circuit. The light shield may be built by using materials already present in the photonic integrated circuit, for example the light shield may include metal walls and doped semiconductor regions. Light-emitting or light-sensitive integrated optical devices or modules of a photonic integrated circuit may be constructed with light shields integrally built in.

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