Patents by Inventor Tsung-Yang Liow

Tsung-Yang Liow has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10598878
    Abstract: A scavenging photodetection device (10) is provided. The scavenging photodetection device (10) includes an optical coupling portion (12) and a scavenging photodetection portion (14). The optical coupling portion (12) includes an optical coupler (16) configured to receive light from a light source, a plurality of light absorbers (18) arranged to absorb the light from the light source that is not collected by the optical coupler (16), and at least one primary input waveguide (20) optically coupled to the optical coupler (16) and configured to direct collected light to a photonic integrated circuit. The scavenging photodetection portion (14) includes a primary photodetector (22) configured to collect uncollected light from the optical coupling portion (12) to determine an alignment position of the photonic integrated circuit.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: March 24, 2020
    Assignee: Rain Tree Photonics Pte. Ltd.
    Inventors: Tsung-Yang Liow, Ying Huang
  • Patent number: 10514497
    Abstract: A photonics packaging method is provided. The photonics packaging method includes providing a substrate (10) and attaching a first optical device (12) to the substrate (10). The first optical device (12) includes a first mode converter (14) optically coupled to a first integrated photonics chip (16). A second optical device (32) is also attached to the substrate (10). The second optical device (32) includes a second mode converter (34) optically coupled to a second integrated photonics chip (36). The second optical device (32) is of a greater height than the first optical device (12). An index-matching material (56) is disposed in a space between the first and second optical devices (12) and (32) and a force is applied on the second optical device (32) to cause the second optical mode converter (34) to align with the first optical mode converter (14). The index-matching material (56) is subsequently cured.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: December 24, 2019
    Assignee: Rain Tree Photonics PTE. LTD.
    Inventors: Ying Huang, Tsung-Yang Liow
  • Publication number: 20190219761
    Abstract: A photonics packaging method is provided. The photonics packaging method includes providing a substrate (10) and attaching a first optical device (12) to the substrate (10). The first optical device (12) includes a first mode converter (14) optically coupled to a first integrated photonics chip (16). A second optical device (32) is also attached to the substrate (10). The second optical device (32) includes a second mode converter (34) optically coupled to a second integrated photonics chip (36). The second optical device (32) is of a greater height than the first optical device (12). An index-matching material (56) is disposed in a space between the first and second optical devices (12) and (32) and a force is applied on the second optical device (32) to cause the second optical mode converter (34) to align with the first optical mode converter (14). The index-matching material (56) is subsequently cured.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 18, 2019
    Inventors: Ying Huang, Tsung-Yang Liow
  • Publication number: 20190219782
    Abstract: A scavenging photodetection device (10) is provided. The scavenging photodetection device (10) includes an optical coupling portion (12) and a scavenging photodetection portion (14). The optical coupling portion (12) includes an optical coupler (16) configured to receive light from a light source, a plurality of light absorbers (18) arranged to absorb the light from the light source that is not collected by the optical coupler (16), and at least one primary input waveguide (20) optically coupled to the optical coupler (16) and configured to direct collected light to a photonic integrated circuit. The scavenging photodetection portion (14) includes a primary photodetector (22) configured to collect uncollected light from the optical coupling portion (12) to determine an alignment position of the photonic integrated circuit.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 18, 2019
    Inventors: Tsung-Yang Liow, Ying Huang
  • Publication number: 20190162519
    Abstract: A photodetector (10) is provided. The photodetector (10) includes an interferometer (12) and a photodetection region (14) coupled to the interferometer (12). The interferometer (12) is configured to generate an optical intensity distribution that corresponds to an electric field distribution in the photodetection region (14).
    Type: Application
    Filed: November 30, 2018
    Publication date: May 30, 2019
    Applicant: Rain Tree Photonics Pte. Ltd.
    Inventors: Ying Huang, Tsung-Yang Liow
  • Publication number: 20190162628
    Abstract: A method for in-line optical testing is provided. The method includes providing a substrate (10), forming an optical device (16) on the substrate (10), and forming a test circuit (20) on the substrate (10), the test circuit (20) being optically coupled to the optical device (16). An optical test is performed on the optical device (16) with the test circuit (20). The test circuit (20) is then removed.
    Type: Application
    Filed: November 30, 2018
    Publication date: May 30, 2019
    Applicant: Rain Tree Photonics Pte. Ltd.
    Inventors: Ying Huang, Tsung-Yang Liow
  • Publication number: 20190162987
    Abstract: A phase-shifter (10) for optical modulation is provided. The phase-shifter (10) includes a first electrode (12), a second electrode (14), a waveguide (16) in a folded configuration between the first and second electrodes (12, 14), and one or more PN junctions (18, 20) provided with the waveguide (16) and connected to the first and second electrodes (12, 14).
    Type: Application
    Filed: November 30, 2018
    Publication date: May 30, 2019
    Applicant: Rain Tree Photonics Pte. Ltd.
    Inventors: Ying Huang, Tsung-Yang Liow
  • Patent number: 9425341
    Abstract: According to one aspect of the invention, there is provided a pin photodetector comprising a dopant diffusion barrier layer disposed within an active light absorbing region of the pin photodetector.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: August 23, 2016
    Assignee: Agency for Science, Technology and Research
    Inventors: Andy Eu-Jin Lim, Tsung-Yang Liow, Patrick Guo-Qiang Lo
  • Patent number: 9335263
    Abstract: An optical circuit for sensing a biological entity in a fluid and a method of configuring an optical circuit for sensing a biological entity in a fluid are provided. The optical circuit includes a sensing arrangement including a reference arm having a reference waveguide and a sensing arm having a waveguide; wherein lengths of the reference waveguide and the waveguide are configured in accordance with a temperature dependency reduction criterion.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: May 10, 2016
    Assignee: Agency for Science, Technology and Research
    Inventors: Xiaoguang Tu, Tsung-Yang Liow, Mingbin Yu, Guo-Qiang Lo
  • Patent number: 9136672
    Abstract: An optical light source is provided. The optical light source includes a waveguide including two reflectors arranged spaced apart from each other to define an optical cavity therebetween, an optical gain medium, and a coupling structure arranged to couple light between the optical cavity and the optical gain medium.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: September 15, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Xianshu Luo, Junfeng Song, Haifeng Zhou, Tsung-Yang Liow, Mingbin Yu, Patrick Guo-Qiang Lo
  • Patent number: 9002163
    Abstract: An optical converter and a method of manufacturing the optical converter are provided. The optical converter may include a signal receiving portion configured to receive an optical signal from an optical fiber which can be coupled to the optical converter, a signal output portion configured to output the optical signal received by the signal receiving portion, and a signal coupling portion being disposed between the signal receiving portion and the signal output portion and being configured to couple the optical signal received by the signal receiving portion into the signal output portion. The signal output portion may include a waveguide element having at least one tapered end section, and being partially or wholly surrounded by the signal coupling portion. The at least one tapered end section may be configured to couple the optical signal from the signal coupling portion into the waveguide element and the waveguide element may be configured to output the optical signal.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: April 7, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Qing Fang, Tsung-Yang Liow, Mingbin Yu, Guo Qiang Patrick Lo
  • Publication number: 20140153600
    Abstract: An optical light source is provided. The optical light source includes a waveguide including two reflectors arranged spaced apart from each other to define an optical cavity therebetween, an optical gain medium, and a coupling structure arranged to couple light between the optical cavity and the optical gain medium.
    Type: Application
    Filed: November 26, 2013
    Publication date: June 5, 2014
    Applicant: Agency for Science, Technology and Research
    Inventors: Xianshu LUO, Junfeng SONG, Haifeng ZHOU, Tsung-Yang LIOW, Mingbin YU, Patrick Guo-Qiang LO
  • Publication number: 20140138789
    Abstract: According to one aspect of the invention, there is provided a pin photodetector comprising a dopant diffusion barrier layer disposed within an active light absorbing region of the pin photodetector.
    Type: Application
    Filed: October 8, 2013
    Publication date: May 22, 2014
    Applicant: Agency for Science, Technology and Research
    Inventors: Andy Eu-Jin Lim, Tsung-Yang Liow, Patrick Guo-Qiang Lo
  • Publication number: 20120328243
    Abstract: An optical converter and a method of manufacturing the optical converter are provided. The optical converter may include a signal receiving portion configured to receive an optical signal from an optical fiber which can be coupled to the optical converter, a signal output portion configured to output the optical signal received by the signal receiving portion, and a signal coupling portion being disposed between the signal receiving portion and the signal output portion and being configured to couple the optical signal received by the signal receiving portion into the signal output portion. The signal output portion may include a waveguide element having at least one tapered end section, and being partially or wholly surrounded by the signal coupling portion. The at least one tapered end section may be configured to couple the optical signal from the signal coupling portion into the waveguide element and the waveguide element may be configured to output the optical signal.
    Type: Application
    Filed: December 23, 2009
    Publication date: December 27, 2012
    Inventors: Qing Fang, Tsung-Yang Liow, Mingbin Yu, Guo Qiang Patrick Lo