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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：US20190212483A1
公开(公告)日：2019-07-11
申请号：US16231726
申请日：2018-12-24
Applicant: Elenion Technologies, LLC
Inventor： Tal Galfsky , Saeed Fathololoumi , Thomas Baehr-Jones , Matthew Streshinsky , Yury Dziashko
Abstract: An on-chip optical filter including three different arm sections comprised of three different types of waveguides, e.g. shape, material or polarization, can achieve the same performance quality as external commercially available solutions with no addition costs of fabrication of the photonic integrated chip (PIC) and a footprint several orders of magnitude smaller than any of the conventional filters.
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公开(公告)号：US20190199062A1
公开(公告)日：2019-06-27
申请号：US15855328
申请日：2017-12-27
Applicant: Elenion Technologies, LLC
Inventor： Yangjin Ma , Yang Liu , Ruizhi Shi , Thomas Wetteland Baehr-Jones , Saeed Fathololoumi
CPC classification number: H01S5/141 , H01S3/083 , H01S3/106 , H01S3/1307 , H01S5/021 , H01S5/0287 , H01S5/06821 , H01S5/1003 , H01S5/1014 , H01S5/1025 , H01S5/142 , H01S5/4025 , H01S5/4062 , H01S5/4087
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：US10942315B2
公开(公告)日：2021-03-09
申请号：US16530179
申请日：2019-08-02
Applicant: Elenion Technologies, LLC
Inventor： Saeed Fathololoumi , Yang Liu , Yaojia Chen
IPC: H01L31/18 , G02B6/32 , G02B6/12 , H01L31/0232 , G02B6/42
Abstract: The back reflection in photodiodes is caused by an abrupt index contrast between the input waveguide and the composite waveguide/light absorbing material. In order to improve the back reflection, it is proposed to introduce an angle between the waveguide and the leading edge of the light absorbing material. The angle will result in gradually changing the effective index between the index of the waveguide and the index of the composite section, and consequently lower the amount of light reflecting back.
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公开(公告)号：US20200272019A1
公开(公告)日：2020-08-27
申请号：US16872703
申请日：2020-05-12
Applicant: Elenion Technologies, LLC
Inventor： Yang Liu , Yangjin Ma , Ran Ding , Thomas Wetteland Baehr-Jones , Saeed Fathololoumi , Kishore Padmaraju
Abstract: Conventionally, wavelength locking and monitoring has been achieved used various components, including calibrated etalon filters, gratings, and arrays of color filters, which offer fairly bulky solutions that require complicated controls. An improved on-chip wavelength monitor comprises: a combination comb filter comprising a plurality of comb filters, each for receiving a test beams, and each comb filter including a substantially different FSR, e.g. 10× to 20× the next closest FSR. A controller dithers a phase tuning section of each comb filter to generate a maximum or minimum output in a corresponding photodetector indicative of the wavelength of the test signal.
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Patent Agency Ranking
公开(公告)号：US20190212498A1
公开(公告)日：2019-07-11
申请号：US15864714
申请日：2018-01-08
Applicant: Elenion Technologies, LLC
Inventor： Saeed Fathololoumi , Yang Liu , Yaojia Chen
IPC: G02B6/32 , G02B6/12 , H01L31/0232 , H01L31/18
CPC classification number: G02B6/327 , G02B6/12 , G02B2006/12126 , G02B2006/12176 , H01L31/02327 , H01L31/18
Abstract: The back reflection in photodiodes is caused by an abrupt index contrast between the input waveguide and the composite waveguide/light absorbing material. In order to improve the back reflection, it is proposed to introduce an angle between the waveguide and the leading edge of the light absorbing material. The angle will result in gradually changing the effective index between the index of the waveguide and the index of the composite section, and consequently lower the amount of light reflecting back.
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公开(公告)号：US10816740B2
公开(公告)日：2020-10-27
申请号：US16265198
申请日：2019-02-01
Applicant: ELENION TECHNOLOGIES, LLC
Inventor： Ari Novack , Saeed Fathololoumi , Michael Caverley
Abstract: Conventional hybrid photonic integrated circuits (PIC) combine one type of semiconductor platform for the main PIC, and a different type of semiconductor platform for a secondary chip. Conventional mounting processes include forming a recess in the main PIC, and mating electrical connectors from the secondary chip and the main PIC within the recess. Mating the first and second electrical connectors in the recess increases the complexity of forming the main PIC, and hampers heat dissipation from secondary chip through oxide layers in the main PIC. Providing a conductive, e.g. redistribution, layer from the first electrode along the bottom and sides of the recess eliminates the complexity in forming the main PIC, and enables the first electrical connector to be mounted directly onto a more thermally conductive substrate material.
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公开(公告)号：US20200067276A1
公开(公告)日：2020-02-27
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
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：US10409005B2
公开(公告)日：2019-09-10
申请号：US15864714
申请日：2018-01-08
Applicant: Elenion Technologies, LLC
Inventor： Saeed Fathololoumi , Yang Liu , Yaojia Chen
IPC: H01L31/18 , G02B6/32 , G02B6/12 , H01L31/0232
Abstract: The back reflection in photodiodes is caused by an abrupt index contrast between the input waveguide and the composite waveguide/light absorbing material. In order to improve the back reflection, it is proposed to introduce an angle between the waveguide and the leading edge of the light absorbing material. The angle will result in gradually changing the effective index between the index of the waveguide and the index of the composite section, and consequently lower the amount of light reflecting back.
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公开(公告)号：US11070033B2
公开(公告)日：2021-07-20
申请号：US16289133
申请日：2019-02-28
Applicant: Elenion Technologies, LLC
Inventor： Thomas Wetteland Baehr-Jones , Saeed Fathololoumi , Yangjin Ma
Abstract: Conventional integrated optical amplifiers, which combine different types of platforms, e.g. silicon photonic integrated circuit for the device layer, and a Group III-V material for the gain medium, typically include a curved waveguide extending through the gain medium coupled to waveguides in the main device layer. Unfortunately, the radius of curvature of the curved waveguide becomes a limiting factor for both size and amplification. Accordingly, an optical amplifier which eliminates the need for the curved waveguide by including a coupler for splitting an input optical signal into two sub-beams, for passage through the gain medium, and a reflector, such as a U-turn, for reflecting or redirecting the two sub-beams back through the gain medium to the coupler for recombination, would be a welcome improvement. A phase tuner may also be provided to ensure coherence cancellation between the two sub-beams to maximize output and minimize back reflection without requiring an isolator.
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